Multispectral tunability in single Eu2+-doped (Ba,Sr)(5)(PO4)(3)Br phosphor
作者：
Li, Ruiling;Zhang, Jing;Qiu, Zhongxian* ;Han, Jin;Zhang, Jilin;...
期刊：
无机化学前沿 ,2020年7(13):2515-2522 ISSN：2052-1545
通讯作者：
Qiu, Zhongxian;Lian, Shixun
作者机构：
[Zhang, Jilin; Zhang, Jing; Lian, Shixun; Li, Ruiling; Qiu, Zhongxian; Yu, Liping; Zhou, Wenli] Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Sustainable Resources Proc & Adv Mat Huna, Minist Educ,Key Lab Chem Biol & Tradit Chinese Me, Changsha 410081, Hunan, Peoples R China.;[Qiu, Zhongxian] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China.;[Han, Jin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Qiu, ZX; Lian, SX] H;[Qiu, Zhongxian] C;Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Sustainable Resources Proc & Adv Mat Huna, Minist Educ,Key Lab Chem Biol & Tradit Chinese Me, Changsha 410081, Hunan, Peoples R China.;Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China.
摘要：
Spectral modification is crucial for luminescent materials. A variety of strategies have been proposed in the literature, including the selection of activator ions with characteristic electron configurations, the modification of the local crystal field, and the design of an emissive center pair and energy transfer. Eu2+-activated haloapatites are considered as candidates for phosphor converted light emitting devices due to their excellent stabilities, easy preparation, and high efficiency. In this work, single-phased, single-doped (Ba,Sr)5(PO4)3Br:Eu2+ is selected and multiple approaches are applied, leading to multicolor tunabilities of the phosphors, including a crystal field strength controlled spectral shift, occupancy selectivity induced spectral saltation, defect-driven color tunability, and irradiation dependent dynamic chromaticity. In the high Eu2+ concentration doped Ba5-mSrm(PO4)3Br phosphor, the main emission band shifts from 448 to 452 nm with increasing Sr2+/Ba2+ ratio, and a second emission band around the green region uplifts in the binary metal solid solution phosphors, leading to variable emission colors from blue to cyan under near UV excitation. Moreover, oxygen vacancy (VO) defects formed under synthetic reducing conditions endow the bromoapatites with bright self-activated luminescence. In the low Eu2+ concentration doped Ba2Sr3(PO4)3Br, the combination of the broad yellow-green emission from VO and bluish emission from Eu2+ contributes to a full spectrum feature. The gradual increase of Eu2+ concentrations regulates the tunable emission from yellow-green, through white, to blue under short UV excitation. Furthermore, due to the different absorption preferences of these two centers, Ba2Sr3(PO4)3Br:0.01Eu2+ shows white light emission under 254 nm irradiation while blue emission when exposed to 365 nm irradiation. The materials with multicolor luminescence show promising versatile applications in lighting, biological detection and anti-counterfeiting. The cooperative effects of multiple strategies provide a promising approach to regulate the optical properties of inorganic phosphors. This journal is © the Partner Organisations.
语种：
英文
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Ultra-high rate capability of nanoporous carbon network@V2O5sub-micron brick composite as a novel cathode material for asymmetric supercapacitors
作者：
Jiao, Yue* ;Wan, Caichao* ;Wu, Yiqiang;Han, Jingquan;Bao, Wenhui;...
期刊：
Nanoscale ,2020年12(45):23213-23224 ISSN：2040-3364
通讯作者：
Jiao, Yue;Wan, Caichao;Li, Jian
作者机构：
[Han, Jingquan; Jiao, Yue] Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China.;[Wu, Yiqiang; Wan, Caichao] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wang, Chengyu; Gao, He; Bao, Wenhui; Li, Jian; Wang, Yaoxing] Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.;[Han, Jingquan; Jiao, Yue] Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China.
通讯机构：
[Jiao, Yue; Li, Jian] N;[Wan, Caichao] C;Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China.;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.
关键词：
Brick;Carbon;Cathode materials;Cathodes;Current density;Supercapacitor;Vanadium pentoxide;Asymmetric supercapacitor;Capacitance retention;Diffusion-controlled process;Electrochemical features;Electrochemical reactions;External surfaces;Large surface area;Nanoporous carbons;Capacitance
摘要：
A green biomass-derived nanoporous carbon network (NCN) has been prepared and integrated with V2O5 sub-micron bricks (SMBs). The large surface area and high pore volume of the NCN can not only provide abundant sites for electrochemical reactions but also stabilize the structure of the V2O5 SMBs. The NCN@V2O5 SMB composite, acting as a novel cathode material, delivers a high areal capacitance of 786 mF cm-2 at 0.2 mA cm-2 and superior cycling stability with 89.5% capacitance retention after 5000 cycles. Besides, the electrode achieves an ultra-high rate capability (82% capacitance retention as the current density increases from 0.2 to 5 mA cm-2) since the contribution from the non-diffusion-controlled process is estimated to be as high as 95.5%-98.5% according to the kinetic analysis. Furthermore, the micropores are more favorable than the mesopores at lower current densities (0.2-2 mA cm-2), while the contribution of the external surface area becomes more significant for current densities higher than 2 mA cm-2. Moreover, an asymmetric supercapacitor assembled using this cathode and the NCN anode shows superior electrochemical properties, such as wide operating voltage, long cycle life and large energy density (72.2 μW h cm-2). Their excellent electrochemical features and good eco-friendliness confirm the potential of the NCN@V2O5 SMBs for use as supercapacitors. © 2020 The Royal Society of Chemistry.
语种：
英文
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A study on the tunable emission induced by energy transfer in rare-earth-free calcite- and vaterite-type CaCO3 co-doped with Sn2+ and Mn2+ phosphors
作者：
Xu, Qingqing;Tong, Xubo;Han, Jin;Zhang, Xinmin*
期刊：
Journal of Alloys and Compounds ,2019年807:151699 ISSN：0925-8388
通讯作者：
Zhang, Xinmin
作者机构：
[Xu, Qingqing; Han, Jin; Tong, Xubo; Zhang, Xinmin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Zhang, Xinmin] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
关键词：
Calcite;Calcium carbonate;Color;Crystal structure;Emission spectroscopy;Energy transfer;Phosphors;Photoluminescence;Precipitation (chemical);Rare earths;Scanning electron microscopy;X ray powder diffraction;Color tunable;Coordination environment;Energy transfer mechanisms;Fluorescence lifetimes;Photoluminescence properties;Rare-earth-free;Scanning electron microscopy image;Visible spectral regions;Manganese compounds
摘要：
Development of rare-earth-free phosphors is quite significant. It is well known that luminescence of Sn2+ depends strongly on the structure of the host crystal. The emission of Mn2+ is often very weak due to forbidden 4T1 → 6A1 transition. However, it can be enhanced by means of energy transfer. This work deals with the photoluminescence of calcite- and vaterite-type CaCO3 doped with Sn2+, Mn2+ phosphors. The phosphor particles were prepared via a simple co-precipitation method. The phase purity of the synthesized particles was determined by X-ray powder diffraction. Scanning electron microscopy images were obtained to study the particle morphology. Photoluminescence properties were determined by recording the emission spectra and excitation spectra. Furthermore, the fluorescence lifetimes were recorded to investigate decay and energy transfer behavior of the samples. The emission colors of calcite-CaCO3:Sn2+ and vaterite-CaCO3:Sn2+ are different under 254 nm UV excitation, which is explained by the different coordination environment of Ca2+. For the Sn2+-Mn2+ co-doped samples, the emission intensity of Mn2+ becomes stronger than that of Mn2+ singly doped sample, which is attributed to Sn2+ → Mn2+ energy transfer. Inokuti-Hirayama model is used to analysis of the involved energy transfer mechanism. The color tone of the samples can be tuned in the visible spectral region through adjusting the Mn2+ doping concentration. Near cold white-light emission can also be achieved in a single host co-doped with Sn2+ and Mn2+. © 2019 Elsevier B.V.
语种：
英文
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Investigation of site occupancy and photoluminescence of Ce3+ in cubic borate Ba3Y2(B2O5)3 and Ce3+ → Tb3+ energy transfer behavior
作者：
Wu, Pianpian;Tong, Xubo;Xu, Yang;Han, Jin;Seo, Hyo Jin;...
期刊：
Optical Materials ,2019年91:246-252 ISSN：0925-3467
通讯作者：
Zhang, Xinmin
作者机构：
[Xu, Yang; Han, Jin; Tong, Xubo; Wu, Pianpian; Zhang, Xinmin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.;[Seo, Hyo Jin] Pukyong Natl Univ, Dept Phys & Interdisciplinary, Program Biomed Mech & Elect Engn, Busan 608737, South Korea.
通讯机构：
[Zhang, Xinmin] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
关键词：
Barium compounds;Energy transfer;Phosphors;Photoluminescence;Sol-gels;Terbium compounds;X ray diffraction analysis;Borate;Dipole dipole interactions;Energy transfer process;Green emission peaks;Interaction mechanisms;Luminescence decay curve;Photoluminescence emission;Site occupancy;Cerium compounds
摘要：
Ce3+, Tb3+ and Ce3+-Tb3+ activated Ba3Y2(B2O5)3 phosphors were synthesized by a sol-gel pyrolysis method. The synthesized phosphors were investigated using X-ray diffraction (XRD) analysis, photoluminescence emission and excitation spectra and luminescence decay curves. In the Ce3+ activated Ba3Y2(B2O5)3 samples, two different Ce3+ centers (marked as Ce(1) and Ce(2)) could exist. The Ba3Y2(B2O5)3:Tb3+ phosphor shows some emission peaks at ∼350–650 nm among which the green emission peak at 540 nm is the strongest. For the Ba3Y2(B2O5)3:Ce3+, Tb3+ co-doped phosphor, the existence of energy transfer process from Ce3+ center to Tb3+ center is confirmed and the interaction mechanism between Ce3+ and Tb3+ in Ba3Y2(B2O5)3:Ce3+,Tb3+ system is dipole-dipole interaction based on Inokuti–Hirayama (I–H) model. © 2019 Elsevier B.V.
语种：
英文
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Spectroscopic properties of red-emitting phosphor series (Y4-xEux)Zn4(SiO4)5 (x = 0.004–4) based on the site occupation of Eu3+ ion
作者：
Tong, Xubo;Han, Jin;Zhang, Xinmin*
期刊：
Optical Materials ,2019年95:109236 ISSN：0925-3467
通讯作者：
Zhang, Xinmin
作者机构：
[Han, Jin; Tong, Xubo; Zhang, Xinmin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Zhang, Xinmin] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
关键词：
Crystal atomic structure;Crystal symmetry;Emission spectroscopy;Europium compounds;Ions;Phosphors;Photoluminescence;Quenching;Silicates;X ray powder diffraction;Zinc compounds;Concentration dependence;Concentration quenching;Electric dipole transition;High temperature solid state methods;Magnetic dipole transition;Photo-luminescence excitation;Site symmetry;Spectroscopic property;Yttrium compounds
摘要：
Y4Zn4(SiO4)5 silicate doped with Eu3+ ions was prepared by the high temperature solid state method. The phase purity of phosphor series (Y4-xEux)Zn4(SiO4)5 (0.004 ≤ x ≤ 4) was checked by X-ray diffraction. The crystal structure, interatomic distances, and atom coordination numbers of Eu4Zn4(SiO4)5 were determined using x-ray powder diffraction. A study of the luminescent properties of (Y4-xEux)Zn4(SiO4)5 was carried out employing photoluminescence excitation and emission spectra and luminescence decay. The occupied sites of Eu3+ ions, relative intensity between magnetic dipole transition and electric dipole transition and the 7FJ levels splitting by the crystal field were discussed in terms of a low symmetry site of Y3+ ion in the Y4Zn4(SiO4)5 host lattice. The concentration quenching of Eu3+ luminescence was also investigated from the concentration dependence of the decay time measured for Eu3+ 5D0 → 7F1,2 luminescence. © 2019 Elsevier B.V.
语种：
英文
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Efficient energy transfer induced tunable emission in Ce3+ and Eu2+ co-doped Ba1.2Ca0.8SiO4 phosphor
作者：
Tong, Xubo;Han, Jin;Cheng, Zhe;Wu, Pianpian;Zhang, Xinmin*
期刊：
Journal of Luminescence ,2019年215:116670 ISSN：0022-2313
通讯作者：
Zhang, Xinmin
作者机构：
[Cheng, Zhe; Han, Jin; Tong, Xubo; Wu, Pianpian; Zhang, Xinmin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Zhang, Xinmin] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.
关键词：
Barium compounds;Calcium compounds;Doppler effect;Energy efficiency;Energy transfer;Light emission;Light emitting diodes;Phosphors;Photoluminescence spectroscopy;Red Shift;Silicates;Solid state reactions;Supercomputers;Thermodynamic stability;Color tunable;Correlated color temperature;Dipole interaction;Efficient energy transfer;Energy transfer mechanisms;Fluorescence decays;Red emitting phosphor;White light emitting diodes;Europium compounds
摘要：
A series of Ce3+ and/or Eu2+ doped T-phase orthosilicate Ba1.2Ca0.8SiO4 (BCS) phosphors were synthesized by conventional solid state reaction. The as-synthesized samples were investigated by X-ray diffraction (XRD), photoluminescence spectroscopy, and fluorescence decay curve. The red shifts of emission peak were observed in Ce3+ and/or Eu2+ doped BCS phosphors. The possible rationalization for the red shift was discussed. The emission color for BCS:Ce3+, Eu2+ phosphors can be turned from deep blue to bluish green by varying Eu2+ concentration. The efficient energy transfer from Ce3+ to Eu2+ is responsible for this phenomenon. The energy transfer mechanism was validated and demonstrated to be a resonant type via a dipole–dipole interaction by using Inokuti–Hirayama model and Dexter's energy transfer theory. In addition, the thermal stability of the phosphors is also investigated. Furthermore, the quantum efficiency (QE) of Ba1.15Ca0.8SiO4:0.02Ce3+, 0.02Na+, 0.01Eu2+ phosphor was found to be 38.77%. Finally, to explore the practical applications of obtained compounds for indoor illumination, a white light-emitting-diode (LED) device which contained a n-UV chip, prepared phosphors, and green emitting and red emitting phosphors was packaged. The packaged white LEDs device can emit dazzling white light with satisfied color coordinate of (0.350, 0.335), Ra (84), and correlated color temperature (4744 K). © 2019 Elsevier B.V.
语种：
英文
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PF树脂对二种单板浸渍改性的比较研究
作者：
王雪莹;周文捷;李陈;韩健
期刊：
中南林业科技大学学报 ,2016年36(11):120-124 ISSN：1673-923X
作者机构：
[王雪莹; 周文捷; 李陈; 韩健] 中南林业科技大学材料科学与工程学院, 湖南, 长沙, 410004
关键词：
PF树脂;浸渍;单板;增重率;磨耗值
摘要：
为提高混凝土模板用胶合板的表面耐磨性,采用浸渍方法,在常温、常压下用PF树脂胶液对杨木和马尾松单板进行了改性处理,对胶液种类、浸渍时间与单板增重率、表面磨耗值之间的关系进行了研究,探讨了提高单板表面耐磨性的合适工艺。研究结果表明,单板经浸渍处理后,胶黏剂主要分布在单板表层,随浸渍时间延长,二种单板的增重率呈上升趋势,表面磨耗值呈下降趋势。当浸渍时间相同时,加入耐磨剂的PF树脂胶液,可显著提高单板的表面耐磨性,碳化硅的耐磨性比二氧化硅更明显,杨木单板的表面耐磨性优于马尾松单板。验证试验表明,PF树脂中加入0.4%的碳化硅、0.1%的海藻酸钠和3.5%的微晶纤维素,杨木单板浸渍3 h,马尾松单板浸渍5 h,二者的表面耐磨性可显著提高。
语种：
中文
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竹木复合板的拉伸与弯曲力学特性
作者：
韩健;周文捷;邹越
期刊：
中南林业科技大学学报 ,2014年34(10):107-110 ISSN：1673-923X
作者机构：
[韩健; 周文捷; 邹越] 中南林业科技大学材料科学与工程学院
关键词：
竹木复合板;拉伸特性;弯曲特性;泊松比
摘要：
竹木复合材料的拉伸和弯曲性能是其重要的力学特性,对其应用有十分重要的影响。通过动态电阻应变仪和电脑程控力学试验机对由竹席、竹帘和杨木单板组成的复合材料的拉伸和弯曲力学性能进行了研究。研究表明竹木复合板的纵向和横向拉伸应变与载荷之间具有显著的线性相关关系,泊松比和弹性模量与载荷之间呈非线性关系。随弯曲载荷增加,竹木复合板的弯曲应力、应变和变形均呈线性增加,但弯曲弹性模量呈非线性下降。泊松比、拉伸和弯曲弹性模量与载荷之间呈非线性关系,证明了该竹木复合板的弹塑性特征。
语种：
中文
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竹碎料／木纤维复合板的拉伸与弯曲力学特性研究
作者：
韩健;周文捷;邹越
期刊：
竹子学报 ,2014年33(3):17-21 ISSN：1000-6567
作者机构：
中南林业科技大学材料科学与工程学院,湖南长沙,410004;[邹越; 韩健; 周文捷] 中南林业科技大学
关键词：
竹碎料;木纤维;复合板;力学特性
摘要：
由竹碎料与木纤维按一定方式复合而成的竹碎料/木纤维复合板的力学特性是影响其用途的主要因素。通过MWD-50型微机程控力学试验机和YD-28A型动态电阻应变仪等主要仪器设备,对竹碎料/木纤维复合板的拉伸和弯曲力学特性进行了检测与分析。研究结果表明,随外加载荷增加,竹碎料/木纤维复合板的纵向拉伸应变呈线性增加,横向拉伸应变以及弯曲应力与应变均呈非线性增加。由于竹碎料/木纤维复合板是一种非均质、各向异性的弹塑性材料,其拉伸泊松比和弯曲弹性模量均不为常量,拉伸泊松比的变化范围在0.15-0.18,弯曲弹性模量的变化范围在1 000-3 000 MPa。
语种：
中文
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A Study on Modification Technology of Poplarthrough Impregnating with UF Resin
作者：
Jian Han;Kai Neng Liu;Xi Tao Gao
期刊：
Advanced Materials Research ,2013年621:54-57 ISSN：1022-6680
通讯作者：
Han, J.
作者机构：
[Jian Han; Kai Neng Liu] Central South University of Forestry and Technology;[Xi Tao Gao] Central South Universityof Forestry and Technology
通讯机构：
[Han, J.] C;College of Material Science and Technology, , Changsha 410004, Hunan, China
会议名称：
International Conference on Materials Science and Manufacturing, ICMSM 2012
会议时间：
14 December 2012 through 16 December 2012
关键词：
Impregnation;Modification technology;Poplar;UF resin
摘要：
Through impregnating with UF resin, the modification technology of Poplar was experimented and studied. The study results proved that the laminated veneer lumber (LVL), impregnated with UF resin, reached fine quality when the bumping vacuum time, the solid content of UF resin, the impregnation temperature and time were respectively 40min, 30%, 25-30°C and 3 hours. The picture of electron microscope showed that in LVL impregnated with UF resin, the wood vessels and cells near the veneer junction sections occurred mostly deformation, but the wood cells depart farther from the veneer junction sections occurred rarely deformation. The cell lumens and middle lamella near the veneer junction sections were almost filled by the resin，but the scarcely any resin filled in the wood cell lumens depart farther from the veneer junction sections.
语种：
英文
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Effect of technology factors on the resin impregnation results of Poplar
作者：
Han, Jian* ;Liu, Kaineng;Gao, Xitao
期刊：
Advanced Materials Research ,2013年750-752:2352-2356 ISSN：1022-6680
通讯作者：
Han, Jian
作者机构：
[Gao, Xitao; Han, Jian; Liu, Kaineng] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Han, Jian] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
3rd International Conference on Advanced Engineering Materials and Technology (AEMT 2013)
会议时间：
MAY 11-12, 2013
会议地点：
Zhangjiajie, PEOPLES R CHINA
会议主办单位：
[Han, Jian;Liu, Kaineng;Gao, Xitao] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Mpregnation;Poplar;Resin;Technology factors
摘要：
Aimed to improve the properties of Poplar, this study, taking phenol-formaldehyde resin (PF) and urea-formaldehyde resin (UF) as impregnation resin, probed the effect of the technology factors-vacuum time, solid content of resin, impregnation temperature and time on the impregnation results of Poplar, and the relationship between the resin and the wood was researched through infrared spectrum. The weight percent gain (WPG) of test-pieces increased with vacuum time extending, and WPG of the test-pieces were greatest when the solid content of resin was 30%, and the impregnation temperature was 25-30°C. when the impregnation time extended from 3 h to 9 h, WPG of the test-pieces presented increase trend which wasnt obvious. In this wood impregnated resin, the reaction between the resin and the hydroxy in wood formed ether bond binding, which proved that the resin and the wood occurred the chemical reaction.
语种：
英文
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Compare of impregnating Poplar with UF and PF resin
作者：
Han, Jian* ;Liu, Kaineng;Gao, Xitao
期刊：
Advanced Materials Research ,2013年779-780:17-20 ISSN：1022-6680
通讯作者：
Han, Jian
作者机构：
[Gao, Xitao; Han, Jian; Liu, Kaineng] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Han, Jian] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
International Conference on Materials, Transportation and Environmental Engineering (CMTEE 2013)
会议时间：
AUG 21-23, 2013
会议地点：
Taichung, TAIWAN
会议主办单位：
[Han, Jian;Liu, Kaineng;Gao, Xitao] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Impregnation;Modification technology;Poplar;UF resin
摘要：
Through impregnation with UF and PF resin, the modification technology of Poplar was experimented and studied. The study results showed that WPG(weight percent gain) of the test-pieces impregnated with UF and PF resin had less difference. The wood vessels were scarcely filled by resin especially UF resin. Regardless of impregnating with UF or PF resin, the cell lumens near the veneer junctions are basically filled by the resin. But the most of the cell lumens depart farther from the veneer junctions were only filled by PF resin instead of UF resin.
语种：
英文
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Majorization of technical treating circle bamboo with ACQ-B
作者：
Han, Jian* ;Luo, Dan
作者机构：
[Luo, Dan; Han, Jian] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
2nd International Conference on Applied Robotics for the Power Industry (CARPI)
会议时间：
SEP 11-13, 2012
会议地点：
Zurich, SWITZERLAND
会议主办单位：
[Han, Jian;Luo, Dan] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
International Conference on Applied Robotics for the Power Industry
关键词：
preservative;circle bamboo;technical condition;optimizing
摘要：
Taking water-solubility preservative(ACQ-B) as the agentia, and the liquid medicine concentration (LMC), the forcing time, the liquid medicine temperature(LMT) and the pressure as the test factors, the permo-treatment was processed to the circle bamboo, and the technical conditions of the treatment were compared. The results showed that each factor and the levels in the same factor had all larger differences to the weight increase rate(WGR) of bamboo, and WGR of the specimens in the same level had also larger difference. Through variance, range and trend analysis, the technical condition for anti-decadent of circle bamboo was that LMC was 1.0%, forcing time 15h, LMT 65., pressure 0.24MPa, which proved that the preservative could get best permeating result through repeat test.
语种：
英文
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Self-assembling behavior of cellulose nanoparticles during freeze-drying: Effect of suspension concentration, particle size, crystal structure, and surface charge
作者：
Han, Jingquan;Zhou, Chengjun;Wu, Yiqiang;Liu, Fangyang;Wu, Qinglin*
期刊：
Biomacromolecules ,2013年14(5):1529-1540 ISSN：1525-7797
通讯作者：
Wu, Qinglin
作者机构：
[Han, Jingquan; Wu, Qinglin; Zhou, Chengjun] Louisiana State Univ AgCtr, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA.;[Wu, Yiqiang] Cent South Forestry Univ Sci & Technol, Coll Mat Sci & Engn, Changsha, Peoples R China.;[Liu, Fangyang] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
通讯机构：
[Wu, Qinglin] L;Louisiana State Univ AgCtr, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA.
摘要：
Cellulose nanocrystals and cellulose nanofibers with I and II crystalline allomorphs (designated as CNC I, CNC II, CNF I, and CNF II) were isolated from bleached wood fibers by alkaline pretreatment and acid hydrolysis. The effects of concentration, particle size, surface charge, and crystal structure on the lyophilization-induced self-assembly of cellulose particles in aqueous suspensions were studied. Within the concentration range of 0.5 to 1.0 wt %, cellulose particles self-organized into lamellar structured foam composed of aligned membrane layers with widths between 0.5 and 3 μm. At 0.05 wt %, CNC I, CNF I, CNC II, and CNF II self-assembled into oriented ultrafine fibers with mean diameters of 0.57, 1.02, 1.50, and 1.00 μm, respectively. The size of self-assembled fibers became larger when more hydroxyl groups and fewer sulfates (weaker electrostatic repulsion) were on cellulose surfaces. Possible formation mechanism was inferred from ice growth and interaction between cellulose nanoparticles in liquid-crystalline suspensions. © 2013 American Chemical Society.
语种：
英文
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Study on the bending mechanical properties of bamboo plywood used middle temperature PF resine
作者：
Han, Jian* ;Zou, Yue
期刊：
Advanced Materials Research ,2012年374-377:1239-1243 ISSN：1022-6680
通讯作者：
Han, Jian
作者机构：
[Zou, Yue; Han, Jian] Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Han, Jian] C;Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
4th International Conference on Technology of Architecture and Structure (ICTAS 2011)
会议时间：
SEP 22-24, 2011
会议地点：
Xian Univ Architecture & Technol, Xian, PEOPLES R CHINA
会议主办单位：
Xian Univ Architecture & Technol
会议论文集名称：
Advanced Materials Research
关键词：
Bamboo plywood;Bending;Mechanical property;Middle temperature PF resine
摘要：
<jats:p>The bending mechanical properties of bamboo plywood which was glued with phenol formaldehyde (PF) resine were detected and analysised. The study results showed that the differences of the bending strength (MOR)and the elastic modulus(MOE) of bamboo plywood prepared separately within 110-130°C were not large, and MOR and MOE exceeded all the targets ruled by JB/T 156-2004. It was proved that the property of this kind of middle temperature PF resine was very well for using in bamboo plywood. When the load was the same, the differences of the deflection、the stress of the bamboo plywood prepared on the different hot-pressing temperature were very small too, but some differences existed in the those strains，and the strains on the lower sursurface of the boards were larger than those on upper surface. When the load was smaller, The deflection、stress and strain of the boards linearly changed with the load increase, which proved that the bamboo plywood mainly produced elastic deformation under this circumstances.</jats:p>
语种：
英文
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不同热压条件下的中温酚醛树脂竹胶合板力学性能比较
作者：
刘凯能;韩健
期刊：
中南林业科技大学学报 ,2012年32(6):168-171 ISSN：1673-923X
作者机构：
[刘凯能; 韩健] 中南林业科技大学材料科学与工程学院
关键词：
中温固化酚醛树脂;热压工艺;竹胶合板;力学性能
摘要：
对不同热压工艺条件下,以中温固化酚醛树脂为胶黏剂,采用"热进热出"和"冷进冷出"热压工艺压制的竹胶合板的主要力学性能进行了检测和比较。研究结果表明,中温固化型酚醛树脂应用于竹胶合板生产是可行的,产品的静曲强度、弹性模量、保留强度等力学性能均达到或超过了国家建设部行业标准(GJ/T 165-2004)的指标,且采用"冷进冷出"工艺比"热进热出"工艺具有更好的效果。经比较,确定中温固化酚醛树脂竹胶合板的最佳热压工艺条件为:热压温度110℃、热压时间70 s/mm、单位压力3.5 MPa。
语种：
中文
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A study on face strain and interlaminar stress of bamboo plywood
作者：
Han, Jian* ;Liang, Chao
期刊：
Advanced Materials Research ,2012年476-478:488-492 ISSN：1022-6680
通讯作者：
Han, Jian
作者机构：
[Liang, Chao; Han, Jian] Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Han, Jian] C;Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
3rd International Conference on Manufacturing Science and Engineering (ICMSE 2012)
会议时间：
MAR 27-29, 2012
会议地点：
Xiamen, PEOPLES R CHINA
会议主办单位：
[Han, Jian;Liang, Chao] Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Bamboo plywood;Face strain;Interlaminar stress;Study
摘要：
The face strain and interlaminar stress of bamboo plywood were studied through finite-element analysis (FEA). The study results showed that under the action of centralized cross line load, the upper face strain (compression strain) of the board gradually increased and the lower face strain (tensile strain) gradually decreased from the middle section to two ends of the board. The stress components (Σ<inf>z</inf>, τ<inf>xz</inf>, τ<inf>yz</inf>) between the each two layer, in the thickness direction, were symmetrical on the plane y=37.5mm, and reached maximum nearby the free edges, but were nearly zero in the board. Within the limit of small deformation, the stress components between the each two layer, in the thickness direction, increased linearly with the load increasing, which resulted in the interlaminar cracking of the product at the free edges. ©(2012) Trans Tech Publications.
语种：
英文
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Valuation on mildew-proof results of ACQ-B to bamboo
作者：
Jian Han;Dan Luo
期刊：
Advanced Materials Research ,2012年580:517-520 ISSN：1022-6680
通讯作者：
Han, J.(hanjianwm@163.com)
作者机构：
[Dan Luo; Jian Han] College of Material Science and Technology, Central South University of Forestry and Technology, Changsha 410004, Hunan, China
通讯机构：
[Han, J.] C;College of Material Science and Technology, , Changsha 410004, Hunan, China
会议名称：
2012 International Mechanical Properties and Structural Materials Conference(IMPSMC2012)(2012机械性能与结构材料国际会议)
会议时间：
2012-08-17
会议地点：
太原
会议论文集名称：
2012 International Mechanical Properties and Structural Materials Conference(IMPSMC2012)(2012机械性能与结构材料国际会议)论文集
关键词：
ACQ-B;Bamboo;Mildew-proof;Valuation
摘要：
In order to increased mildew-proof capability of bamboo, ACQ-B was taken as mildew preventive, and the concentration and temperature of ACQ-B, the pressure and forcing time as the test factors. The relationship between the technical factor and the moulding of bamboo was researched through the orthogonal test. The results showed that the more the weight of bamboo increased, i.e., the more ACQ-B permeating into bamboo was, the better the mildew-proof capability of the bamboo was. Through the analysis and comparing to the test results, that the concentration of ACQ-B was 0.4%, the forcing time was15h, the temperature of ACQ-B was 65°C, and the pressure was 0.24MPa was the best technical condition when bamboo was treated with ACQ-B. ©(2012) Trans Tech Publications, Switzerland.
语种：
英文
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A study on tensile mechanical properties of bamboo plywood
作者：
Han, Jian* ;Gao, Xitao
期刊：
Advanced Materials Research ,2011年291-294:1009-1014 ISSN：1022-6680
通讯作者：
Han, Jian
作者机构：
[Gao, Xitao; Han, Jian] Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Han, Jian] C;Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
International Conference on Advanced Engineering Materials and Technology (AEMT2011)
会议时间：
JUL 29-31, 2011
会议地点：
Sanya, PEOPLES R CHINA
会议主办单位：
[Han, Jian;Gao, Xitao] Cent S Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Bamboo plywood;Poisson ratio;Strain;Stress;Tensile elastic modulus
摘要：
The tensile mechanical properties of bamboo mat and curtain plywood(for short bamboo plywood)were studied through "electrometric method". It was proved that in the range of elastic deformation,the Poisson's ratio and the elastic modulus of the bamboo plywood were not constant. The Poisson's ratio of the bamboo plywood decreased nonlinearly with the load increase that Poisson's ratio decreased markedly when the load was less than 1kN,and decreased gently when more than 1kN.The tensile elastic modulus of the bamboo plywood also increased nonlinearly with the load increase that the tensile modulus of elasticity increased drastically when the load was less than 800N,and increased less when exceeded 800N. In the process of loading,the tensile deformation?the tensile stress and strain all increased linearly with the load increase,and the tensile stress and strain both were linearly relevant to tensile deformation. ©(2011) Trans Tech Publications, Switzerland.
语种：
英文
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Graft copolymerization of methyl methacrylate onto bamboo cellulose under microwave irradiation
作者：
Wan, Zhenglong;Xiong, Zhouyi;Ren, Heling;Huang, Yuanyuan;Liu, Huaxi;...
期刊：
Carbohydrate Polymers ,2011年83(1):264-269 ISSN：0144-8617
通讯作者：
Xiong, Hanguo
作者机构：
[Liu, Huaxi; Wan, Zhenglong; Xiong, Hanguo; Ren, Heling; Huang, Yuanyuan] Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan 430070, Peoples R China.;[Xiong, Zhouyi] Huazhong Agr Univ, Chutian Coll, Wuhan 430205, Peoples R China.;[Wu, Yiqiang; Han, Jian] Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Xiong, Hanguo] H;Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan 430070, Peoples R China.
关键词：
Bamboo cellulose;Graft copolymerization;Methyl methacrylate;Microwave
摘要：
Grafting of methyl methacrylate (MMA) onto bamboo cellulose using ceric ammonium nitrate (CAN) as an initiator was carried out under microwave irradiation. The graft copolymers were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The effects of varying the microwave power, exposure time and concentration of initiator of graft polymerization were studied by determining the grafting parameters, such as grafting percentage and grafting efficiency. The experimental results showed that the optimal conditions for grafting were: [CAN] = 0.004 mol/L, which was acidified with 0.1 mol/L nitric acid; exposure time, 9 min; and the microwave power, 160 W. Moreover, the moisture absorption ability of the graft copolymers decreased significantly with the increase in grafting percentage. © 2010 Elsevier Ltd.
语种：
英文
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