Preparation and characterization of expanded perlite/wood-magnesium composites as building insulation materials
作者:
Lin, Yunfei;Li, Xingong* ;Huang, Qinghua
期刊:
Energy and Buildings ,2021年231:110637 ISSN:0378-7788
通讯作者:
Li, Xingong
作者机构:
[Li, Xingong; Huang, Qinghua; Lin, Yunfei] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
通讯机构:
[Li, Xingong] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词:
Building energy conservation;Building insulation materials;Expanded perlite;Flame retardant;Inorganic spatial network structure;Mechanical properties;Smoke suppression
摘要:
Installing thermal insulation material in the wall is a major means of improving building energy conservation. However, traditional building insulation materials have defects in varying degrees, including flammability, low strength, and not environment-friendly. To solve this problem, a novel thermal insulation composite composed of expanded perlite (EP)/wood-magnesium (EPWMC) was prepared by filling EP into wood-magnesium composites. The mechanical properties, frost resistance, thermal insulation performance, flame retardancy, and smoke suppression properties of these composites were characterized by scanning electron microscopy, X-ray diffraction spectroscopy, and cone calorimetry. The results revealed that, for EPWMC composites filled with 60–70 mesh EP, the modulus of rupture and elasticity and softening coefficient were all clearly increased. In addition, the thickness swelling of these materials decreased significantly. An inorganic spatial network structure was observed to be formed by the aggregation of hydration products of magnesium cement, which improved composite strength and water resistance. These positive results effectively extended the service life of EPWMC materials and broadened their scope of use in wet conditions. The observed excellent flame retardant and smoke suppression performances yield these composites as ideal building insulation materials for exterior or interior walls. © 2020 Elsevier B.V.
语种:
英文
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几种改性剂对稻草纤维/ABS复合材料挥发性有机化合物释放的影响
作者:
夏琪琪;朱凌波;李新功;郑霞
期刊:
复合材料学报 ,2019年36(1):96-103 ISSN:1000-3851
通讯作者:
Li, Xingong(lxgwood@163.com)
作者机构:
[夏琪琪; 朱凌波; 李新功; 郑霞] College of Material Science and Engineering, Central South University of Forestry & Technology, Changsha;410000, China;[夏琪琪; 朱凌波; 李新功; 郑霞] 410000, China
通讯机构:
[Li, X.] C;College of Material Science and Engineering, China
关键词:
稻草纤维;丙烯腈-丁二烯-苯乙烯(ABS);活性炭;复合材料;挥发性有机化合物(VOC)
摘要:
以稻草纤维及丙烯腈-丁二烯-苯乙烯(ABS)为原料,分别以活性炭、Al_2O_3、SiO_2为改性剂,通过混炼-模压工艺制备了稻草纤维/ABS复合材料,采用热重-质谱联用仪对复合材料的挥发性有机化合物(VOC)释放情况进行对比分析,探讨了几种改性剂对稻草纤维/ABS复合材料VOC释放的影响。研究发现:ABS及稻草纤维均能在热解过程中释放CH_2O、C_2H_4O及C_3H_4O,而C_6H_6、C_7H_8、C_8H_8等苯类及烷烃类物质的释放源则主要为ABS;活性炭的添加能够显著降低稻草纤维/ABS复合材料的VOC释放,其VOC释放总量降低了55.5%; Al_2O_3和SiO_2虽然能比较明显地降低复合材料中苯类物质的释放含量,分别降低了32.4%和30.9%,但是其中的Fe、Cu等金属杂质却能够催化醛类物质的产生,导致VOC释放总量分别增加了11.8%和235.7%。
语种:
中文
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纳米TiO_2改性脲醛树脂中游离甲醛的光催化降解研究
作者:
卿彦;关鹏飞;詹满军;陈秀兰;刘文杰;...
期刊:
中南林业科技大学学报 ,2019年39(7):108-113,142 ISSN:1673-923X
作者机构:
中南林业科技大学材料科学与工程学院;[詹满军] 广西丰林木业集团股份有限公司;[陈秀兰] 大亚人造板集团有限公司;[卿彦; 刘文杰; 吴义强; 李新功; 罗莎; 刘明; 关鹏飞] 中南林业科技大学
关键词:
游离甲醛;锐钛矿型二氧化钛;紫外光;光催化;降解
摘要:
如何降低游离甲醛含量一直是脲醛树脂研究的热点之一。采用锐钛矿型纳米二氧化钛(TiO_2)改性脲醛树脂,探索在紫外光(波长λ=365 nm)照射下,纳米TiO_2对脲醛树脂中游离甲醛的催化降解效果。通过分析脲醛树脂中游离甲醛的含量,研究了光照类型、时间以及纳米TiO_2的含量对光降解甲醛的影响。使用傅里叶变换红外光谱(FTIR)、同步热分析(TG)表征了光催化降解游离甲醛对脲醛树脂化学结构及热性能的影响。结果表明:在脲醛树脂的降醛处理中,加入尿素质量1 %的锐钛矿型纳米TiO_2,室温下紫外光照时长48 h,可以获得36.7 %的游离甲醛降解率。紫外光照可以促进脲醛树脂的固化,使其固含量和粘度上升,固化时间缩短,但对脲醛树脂的化学结构和热性能没有明显影响。
语种:
中文
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Preparation of mineral bound particleboards with improved fire retardant and smoke suppression properties based on a mix of inorganic adhesive
作者:
Yang, Kai;Li, Xingong*
期刊:
Holzforschung ,2019年73(6):599-604 ISSN:0018-3830
通讯作者:
Li, Xingong
作者机构:
[Li, Xingong; Yang, Kai] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构:
[Li, Xingong] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词:
Adhesives;Carbon dioxide;Carbon monoxide;Chlorine compounds;Fires;Flame retardants;Formaldehyde;Gaseous effluents;Magnesia;Mechanical properties;Microstructure;Particle board;Scanning electron microscopy;Silicon compounds;Sodium compounds;Fire retardancy;Formaldehyde emission;Indoor materials;Inorganic adhesives;Smoke suppression;Smoke;Adhesives;Carbon Dioxide;Carbon Monoxide;Chlorine Compounds;Fires;Flame Retardants
摘要:
An inorganic adhesive mix consisting of MgO, MgCl2, Na2SiO3, Na3PO4 was used to prepare mineral bound particleboard (mbPB) without formaldehyde emission and with excellent fire retardant and smoke suppression properties. The mechanical properties, interior microstructure, fire retardancy and smoke suppression behavior of the mbPB was investigated based on scanning electron microscopy (SEM) and cone calorimetric observations. The results showed that the presence of massive hydrates of the inorganic adhesive covers the mbPB particles, which are responsible for the positive effects. The effective smoke suppression was accompanied by an essential carbon monoxide (CO) and carbon dioxide (CO2) decrement in the gaseous effluents. The mbPBs are suitable as indoor material for wall, floor, and furniture as fire retardant and smoke suppressive materials. © 2019 Walter de Gruyter GmbH, Berlin/Boston 2019.
语种:
英文
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UF/PDMI组合胶黏剂在刨花板生产中的应用
作者:
刘明;陈秀兰;詹满军;李新功;吴义强
期刊:
林产工业 ,2019年56(10):13-18 ISSN:1001-5299
作者机构:
中南林业科技大学材料科学与工程学院,长沙,410004;大亚人造板集团有限公司,镇江,212300;广西丰林木业集团股份有限公司,南宁,530031;[詹满军] 广西丰林木业集团股份有限公司;[吴义强; 李新功; 刘明] 中南林业科技大学
关键词:
刨花板;脲醛树脂;聚合异氰酸酯;物理力学性能;节能
摘要:
采用脲醛树脂(UF)/聚合异氰酸酯(PDMI)组合胶黏剂,以不同的组合配比在较低热压温度(160℃)条件下用高含水率(9.0%)杂木刨花制备刨花板,检测其静曲强度、内结合强度以及2 h和24 h吸水厚度膨胀率.结果表明:聚合异氰酸酯(PDMI)的引入,可以显著提高刨花板的物理力学性能和耐水性能;将刨花终含水率提高至9.0%可节约刨花干燥能耗达13.0%以上;与脲醛树脂胶黏剂(UF)相比,使用PDMI/UF配比为1:9的(10.0 wt%PDMI)组合胶黏剂可以提高刨花板静曲强度80%,提高内结合强度150%;在不添加防水剂的条件下,可以将板材的2 h吸水厚度膨胀率由31.0%提高至21.0%.该研究可为刨花板节能环保生产提供新思路.
语种:
中文
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人造板用棉籽粉基胶粘剂改性研究
作者:
刘明;陈秀兰;詹满军;吴义强;刘元;...
期刊:
中国胶粘剂 ,2019年28(05):25-30 ISSN:1004-2849
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;大亚人造板集团有限公司,江苏镇江,212300;广西丰林木业集团股份有限公司,广西南宁,530031;[李贤军; 卿彦; 吴义强; 李新功; 刘元; 刘明] 中南林业科技大学;[詹满军] 广西丰林木业集团股份有限公司
关键词:
胶粘剂;棉籽粉;人造板;黏度
摘要:
研究了碱处理、尿素改性、碱和尿素联合改性以及淀粉基胶粘剂共混对棉籽粉基胶粘剂理化性质及物理力学性能的影响。研究结果表明:改性方法对棉籽粉基胶粘剂干状胶合强度(≥4.0 MPa)无明显影响,并且碱和尿素联合改性可以将棉籽粉基胶粘剂的黏度从51.0 mPa·s提高至128.5 mPa·s。而使用高黏度淀粉基胶粘剂与棉籽粉基胶粘剂共混制得的复合胶粘剂的黏度高于530 mPa·s;尿素对棉籽粉中的棉蛋白具有一定的活化作用,淀粉基胶粘剂并未对棉籽粉化学官能团产生影响;获得的棉籽粉基胶粘剂符合人造板生产工艺要求,为其工业化利用提供支持。
语种:
中文
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木基免拆保温建筑模板制备及其性能研究
作者:
黄清华;郑霞;高歌;贺正国;谢向荣;...
期刊:
功能材料 ,2019年50(1):1091-1097 ISSN:1001-9731
通讯作者:
Li, X.
作者机构:
[郑霞; 黄清华; 贺正国; 李新功; 高歌] Academy of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410000, China;[谢向荣] Green Construction Technology Group New Building Materials High-Tech Co., Ltd, Changsha, 410000, China
通讯机构:
[Li, X.] A;Academy of Materials Science and Engineering, China
关键词:
木材加工剩余物;无机胶粘剂;物理力学性能;导热系数;抗冻性能;优化工艺
摘要:
以木材加工剩余物碎料和自制无机胶粘剂为原料, 通过热压工艺制备木基免拆保温建筑模板.研究了施胶量、热压时间、热压温度及板材密度对其性能的影响.结果表明, 试验范围内, 随着施胶量、密度的增大, 木基免拆保温建筑模板的抗折强度、弹性模量、软化系数、导热系数逐渐增大, 抗冻性能增强;随着热压温度、热压时间的增加, 木基免拆建筑模板的抗折强度、弹性模量、软化系数先增大后减少, 导热系数逐渐下降, 抗冻性能先上升后下降.通过分析获得木基免拆保温建筑模板优化制板工艺参数:密度为0.9g/cm3, 施胶量为65%, 热压温度为120℃, 热压时间为12min.
语种:
中文
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Combined effect of three additives on enhancing the anti-aging property of wood fiber/polycaprolactone composite
作者:
Yang, Kai;Li, Xingong* ;Tang, Qian
期刊:
Materials Research Express ,2019年6(8):085103 ISSN:2053-1591
通讯作者:
Li, Xingong
作者机构:
[Li, Xingong; Yang, Kai; Tang, Qian] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构:
[Li, Xingong] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词:
Additives;Bending strength;Butylated hydroxyanisole;Composite materials;Mechanical properties;Mixtures;Moisture;Polycaprolactone;Surface morphology;Tensile strength;Thermodynamic stability;Wood products;1 ,4-butanediol diglycidyl ethers;Anti-aging;Anti-aging properties;Hydrothermal treatments;Modified composites;Moisture absorption;Morphology and mechanical properties;Wood plastic composite;Morphology
摘要:
Wood-plastic composites (WPC) have received considerable interest in the past few years due to its low cost and easy processability. However, the poor anti-aging property in high temperature and humidity remains the major problem for its wildly application. In this study, a mixture consisting of butylated hydroxyanisole (BHA), Ca/Zn stabilizer and 1,4-butanediol diglycidyl ether (BDDGE) was used to modify the anti-aging property of wood fiber (WF)/polycaprolactone (PCL) composite. To investigate the anti-aging property of the prepared composite, a hydrothermal treatment (72 h, 80 °C, 95% moisture) was employed. After hydrothermal treatment, the surface morphology, thermostability, mechanical property, moisture absorption of the original composite (OC) and the modified composite (MC) were recorded. The result showed that, adding the mixture can efficiently improve the anti-aging property of WF/PCL composite in maintaining surface morphology and mechanical property. Compared with the OC, the loss rate of tensile strength and bending strength of the MC were decreased by 40.86%, 38.63% respectively, the moisture absorption decreased from 6.69% to 4.65%. This result exhibit a method to improve the anti-aging property for the WPC in multi-aspects. © 2019 IOP Publishing Ltd.
语种:
英文
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碱处理对竹纤维/聚乳酸可降解复合材料性能影响研究
作者:
左迎峰;李萍;刘文杰;李新功;江萍;...
期刊:
功能材料 ,2018年49(2):2006-2012 ISSN:1001-9731
通讯作者:
Wu, Y.
作者机构:
[江萍; 吴义强; 李新功; 左迎峰; 刘文杰] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, 410004, China;College of Art & Design, Xiangnan University, Chenzhou, 423000, China;[李萍] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, 410004, China, College of Art & Design, Xiangnan University, Chenzhou, 423000, China
通讯机构:
[Wu, Y.] C;College of Material Science & Engineering, China
关键词:
竹纤维;碱处理;聚乳酸;可降解复合材料;相容界面
摘要:
以NaOH溶液为改性剂对竹纤维进行碱处理,再与聚乳酸(PLA)熔融共混制备竹纤维/PLA可降解复合材料。探讨了NaOH溶液浓度、碱处理时间和碱处理温度对复合材料拉伸强度、抗弯强度和耐水性能的影响规律,并采用扫描电子显微镜(SEM)对碱处理竹纤维的表面形貌进行了观测。结果表明,碱处理使竹纤维表面粗糙度增大,单纤维的强度提高,有效提高了与PLA基体的机械黏接力。但碱浓度过大、处理时间过长或处理温度过高时,纤维素分子链排列致密程度降低,整体纤维的力学性能下降。NaOH溶液浓度为3%,处理时间为4h,处理温度为60℃时,所制得竹纤维/PLA复合材料拉伸性能、弯曲性能和耐水性能均最佳。
语种:
中文
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竹纤维/聚乳酸可降解复合材料相容界面构建进展
作者:
李文豪;吴义强;李萍;李新功;左迎峰
期刊:
材料导报 ,2018年32(17):3076-3082 ISSN:1005-023X
通讯作者:
Zuo, Yingfeng(zuoyf1986@163.com)
作者机构:
[李文豪; 吴义强; 李萍; 李新功; 左迎峰] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[李文豪; 吴义强; 李萍; 李新功; 左迎峰] 410004, China
通讯机构:
[Zuo, Y.] C;College of Materials Science and Engineering, China
关键词:
竹纤维;聚乳酸;复合材料;相容界面
摘要:
竹纤维/聚乳酸可降解复合材料是一种性能优越、可完全生物降解的绿色生态环保材料。在针对亲水竹纤维与疏水聚乳酸界面不相容而导致竹纤维/聚乳酸复合材料性能劣化的问题,研究者通常采用三种策略来提高其界面相容性:竹纤维改性、聚乳酸树脂改性和增容剂改性。在现有研究基础上,未来可以通过引进纳米纤维改性粒子改善复合体系的界面相容性,完善两相界面基础理论,促进更深入的界面作用及其机理研究,以推动竹纤维/聚乳酸可降解复合材料的发展。
语种:
中文
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硅镁水泥竹刨花板制备及其性能研究
作者:
黄清华;赵星;郑霞;李新功
期刊:
新型建筑材料 ,2018年45(9):25-29 ISSN:1001-702X
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;[赵星; 黄清华; 李新功; 郑霞] 中南林业科技大学
关键词:
竹刨花;水泥刨花板;物理力学性能;优化工艺
摘要:
为降低人造板制造成本,提高竹材加工利用率,以竹刨花和自制无机胶黏剂为原料,通过热压工艺制备了硅镁水泥竹刨花板.研究了施胶量、热压时间和温度对板材密度及其性能的影响.结果表明,试验范围内,随着施胶量增大、热压温度升高和热压时间延长,板材的静曲强度、弹性模量均先提高后降低,内结合强度逐渐提高,24 h吸水厚度膨胀率逐渐减小;随着板材密度的增大,硅镁水泥竹刨花板的静曲强度、弹性模量和内结合强度逐渐提高,24 h吸水厚度膨胀率逐渐减小.硅镁水泥竹刨花板优化制板工艺参数为:施胶量45%,热压温度110℃,热压时间9 min,板材密度1.1 g/cm3.
语种:
中文
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几种不同改性剂对稻草/丙烯腈-丁二烯-苯乙烯复合材料性能的影响
作者:
朱凌波;李新功;杨凯;张晓凤;卢立
期刊:
复合材料学报 ,2018年35(7):1791-1799 ISSN:1000-3851
通讯作者:
Li, Xingong(lxgwood@163.com)
作者机构:
[朱凌波; 李新功; 杨凯; 张晓凤; 卢立] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410000, China;[朱凌波; 李新功; 杨凯; 张晓凤; 卢立] 410000, China
通讯机构:
[Li, X.] S;School of Materials Science and Engineering, China
关键词:
木塑复合材料;稻草;丙烯腈-丁二烯-苯乙烯(ABS);活性炭;硅烷偶联剂;增强
摘要:
以稻草纤维及丙烯腈-丁二烯-苯乙烯(ABS)为原料,分别以活性炭、Al_2O_3、SiO_2和硅烷偶联剂为增强改性剂,通过混炼-模压工艺制备了改性剂-稻草/ABS复合材料,对比研究了几种不同增强改性剂的增强效果及其增强机制。结果表明:硅烷偶联剂对稻草/ABS复合材料的增强效果较差,活性炭、Al_2O_3和SiO_2对稻草/ABS复合材料的增强均优于硅烷偶联剂,其中Al_2O_3的增强效果最佳。当Al_2O_3的添加量(Al_2O_3∶ABS质量比)为5%时,Al_2O_3-稻草/ABS复合材料的拉伸、弯曲及冲击强度分别达到最大值27.719 MPa、61.05 MPa和26.53 kJ/m~2;当无机物添加量(无机物∶ABS质量比)为5%时,复合材料的耐水性能表现为:5% Al_2O_3>5%活性炭>5%SiO_2>未添加,与复合材料的力学性能梯度相符;改性剂-稻草/ABS复合材料的流变性能则表现为: 5%活性炭>5%Al_2O_3>5%SiO_2>未添加。
语种:
中文
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Preparation and characterization of polylactic acid-g-bamboo fiber based on in-situ solid phase polymerization
作者:
Zuo, Yingfeng;Li, Wenhao;Li, Ping;Liu, Wenjie;Li, Xingong;...
期刊:
Industrial Crops and Products ,2018年123:646-653 ISSN:0926-6690
通讯作者:
Wu, Yiqiang
作者机构:
[Li, Xingong; Wu, Yiqiang; Li, Wenhao; Zuo, Yingfeng; Li, Ping; Liu, Wenjie] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Li, Xingong; Wu, Yiqiang; Zuo, Yingfeng] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.
通讯机构:
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词:
bamboo fiber;hydrophobicity;in-situ solid phase polymerization;interfacial compatibility;polylactic acid
摘要:
This study details effort to improve the interfacial compatibility of bamboo fiber/polylactic acid composites, by attaching the molecular chain of polylactic acid (PLA) to bamboo fibers (BF). The BF was pretreated using a 1 wt% sodium hydroxide solution and the lactic acid was then grafted onto BFs using in-situ solid phase polymerization. The prepared PLA grafted BF (PLA-g-BF) was characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), the results confirmed that the grafting reaction occurred successful. The grafting ratio of the PLA-g-BF was 16.51% and the degree of substitution was 35.59%. The effect of reaction temperature and time on the degree of substitution of the PLA-g-BF was studied. The results showed that a reaction temperature of 80 °C and a reaction time of 7 h were the optimum conditions. The hydrophobicity, surface morphology, crystal structure, thermal properties and tensile properties of the PLA-g-BF were characterized. The results demonstrated that the surface and interior of BF were covered with PLA. The crystalline structure of the BF was somewhat damaged, which decreased its crystallinity and tensile strength. The grafting reaction improved the thermoplasticity and thermogravimetric performance of the PLA-g-BF. Moreover, the hydrophobicity of the PLA-g-BF was significantly increased. © 2018 Elsevier B.V.
语种:
英文
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竹纤维/聚乳酸可降解复合材料的增塑改性
作者:
左迎峰;李文豪;李萍;赵星;李新功;...
期刊:
林业工程学报 ,2018年3(1):77-82 ISSN:2096-1359
作者机构:
中南林业科技大学材料科学与工程学院,长沙,410004;[赵星; 李文豪; 吴义强; 李新功; 李萍; 左迎峰] 中南林业科技大学
关键词:
竹纤维;聚乳酸;复合增塑;界面相容性;机械性能;耐水性能
摘要:
以竹纤维和聚乳酸(PLA)为原料,乙二醇、甘油、聚乙二醇400、尿素、甲酰胺和柠檬酸酯为增塑剂,通过熔融共混法制备了竹纤维/PLA可降解复合材料。探讨了一元增塑、二元复合增塑和三元复合增塑对竹纤维/PLA复合材料拉伸强度、抗弯强度、断裂伸长率和耐水性能的影响。试验结果表明,不同增塑剂对竹纤维/PLA复合材料的增塑效果不同,甘油增塑复合材料的拉伸强度和抗弯强度最大,甲酰胺增塑复合材料的断裂伸长率最大,柠檬酸酯增塑复合材料的耐水性能最优。二元复合增塑具有协同增塑效果,甘油/柠檬酸脂复合增塑竹纤维/PLA复合材料的拉伸强度和抗弯强度最大,乙二醇/甲酰胺复合增塑竹纤维/PLA复合材料的断裂伸长率最大,乙二醇/柠檬酸酯复合增塑竹纤维/PLA复合材料的耐水性能最优。三元复合增塑在获得较好相容性的同时,复合材料的韧性明显提高,甘油/柠檬酸酯/乙二醇、甘油/柠檬酸脂/甲酰胺复合增塑竹纤维/PLA复合材料不仅具有较高的强度,且断裂伸长率和耐水性能均较好,优于一元和二元增塑效果。
语种:
中文
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三聚氰胺/纳米TiO2联合改性脲醛树脂胶粘剂研究
作者:
刘文杰;刘明;李新功;李贤军;吴义强;...
期刊:
中国胶粘剂 ,2018年27(10):10-14 ISSN:1004-2849
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;[李贤军; 卿彦; 刘文杰; 吴义强; 李新功; 刘明; 左迎峰] 中南林业科技大学
关键词:
三聚氰胺;纳米TiO2;脲醛树脂;游离甲醛;热性能
摘要:
以甲醛、尿素为原料,纳米TiO2和三聚氰胺为改性剂,采用“碱-酸-碱”的合成工艺合成脲醛树脂,并对三聚氰胺/纳米TiO2联合改性脲醛树脂工艺进行优化。研究结果表明:当纳米TiO2用量不变,脲醛树脂的黏度、固含量、胶合强度随三聚氰胺加入量增加而增大,而固化时间和游离甲醛含量则呈现出相反的变化趋势;添加w(三聚氰胺)=1.5%(相对于尿素添加质量而言)改性后的脲醛树脂游离甲醛含量为0.41%,耐水胶合强度为1.25 MPa,对不同配比的甲醛/尿素(F/U)脲醛树脂,三聚氰胺/纳米TiO2联合改性性能相似;改性后的脲醛树脂及纳米TiO2能够均匀分布于木材表面,以保证较好的胶合强度和联合改性效果。
语种:
中文
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Preparation and characterization of fire retardant straw/magnesium cement composites with an organic-inorganic network structure
作者:
Zuo, Yingfeng;Xiao, Junhua;Wang, Jian;Liu, Wenjie;Li, Xingong;...
期刊:
Construction and Building Materials ,2018年171:404-413 ISSN:0950-0618
通讯作者:
Wu, Yiqiang
作者机构:
[Xiao, Junhua; Wang, Jian; Li, Xingong; Wu, Yiqiang; Zuo, Yingfeng; Liu, Wenjie] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构:
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词:
Fire-retardant;Magnesium cement;Mechanical property;Organic-inorganic network structure;Silicone-acrylate emulsion;Straw;Water resistance
摘要:
Magnesium cement product is an excellent fire-retardant material that has been extensively used in the building materials industry. But their strength and ability to withstand humid conditions still yet to be improved. The silicone-acrylate emulsion was utilized in this study to improve the water resistance and mechanical strength of the straw-magnesium cement (SMC) composites. The properties improvement mechanism and fire-retardant performances was also analyzed. For the SMC composites containing 6% silicone-acrylate emulsion, the modulus of rupture, internal bond strength and the strength retention coefficient after immersion have all increased significantly. In contrast, the thickness swelling, water absorption decreased dramatically. The analysis results showed that an organic-inorganic network structure was formed in the novel magnesium cement, which enhanced the integrity of the material and played a role in protecting the crystals against hydrolysis. With the enhanced water resistance and mechanical strength, the novel SMC composites broadened the use in humid environments and increased the service life. Their excellent fire-resistant properties make the novel SMC composites an ideal candidate for use in public venues.
语种:
英文
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炭化处理对重组竹阻燃抑烟性能影响
作者:
杨凯;李新功;郑霞;唐钱
期刊:
功能材料 ,2018年49(3):03020-03024 ISSN:1001-9731
通讯作者:
Li, X.
作者机构:
[唐钱; 郑霞; 李新功; 杨凯] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构:
[Li, X.] S;School of Materials Science and Engineering, China
关键词:
炭化处理;重组竹;阻燃;抑烟
摘要:
利用锥形量热仪、氧指数测定仪和烟密度测定仪研究了炭化处理对重组竹阻燃抑烟性能的影响,结果表明,炭化处理可以降低重组竹燃烧热释放速率和质量损失速率,减少热释放总量,增大氧指数,延迟点燃时间。炭化处理使重组竹燃烧热释放速率峰值降低了36.6%、达到峰值的时间延迟了450s,点燃时间增加了5倍,氧指数增大了49.3%,质量损失速率峰值降低了21.8%、达到峰值的时间延迟了505s;炭化处理显著降低了重组竹烟生成速率、烟生成总量、烟密度及一氧化碳与二氧化碳释放速率。炭化处理使重组竹燃烧烟密度降低了35.9%,一氧化碳与二氧化碳释放速率达到最大值时间延迟了600s左右。炭化处理对重组竹具有明显的阻燃抑烟效果。
语种:
中文
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麦秸/木材均质复合无机碎料板的制备及其性能
作者:
潘亚鸽;朱凌波;唐钱;黄清华;李新功
期刊:
材料导报 ,2017年31(2):25-29 ISSN:1005-023X
通讯作者:
Li, Xingong(lxgwood@163.com)
作者机构:
[潘亚鸽; 朱凌波; 唐钱; 黄清华; 李新功] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[潘亚鸽; 朱凌波; 唐钱; 黄清华; 李新功] 410004, China
通讯机构:
[Li, X.] S;School of Materials Science and Engineering, China
关键词:
麦秸;木材;均质复合;无机碎料板;物理力学性能;优化工艺
摘要:
以麦秸、木材和环保阻燃无机胶黏剂为主要原料,通过麦秸和木材碎料均匀混合的方式,采用热压工艺制备麦秸/木材均质复合无机碎料板,研究了麦秸与木材的配比、施胶量、热压时间和热压温度对板材性能的影响,并通过X射线衍射仪、扫描电镜分析了其对板材性能的影响机制。结果表明,随着麦秸与木材配比减小,板材静曲强度(MOR)、弹性模量(MOE)和内结合强度(IB)逐渐增大,2h吸水厚度膨胀率(TS)逐渐减小,优选配比为m(麦秸)∶m(木材)=4∶6。随着施胶量的增大,板材的MOR、MOE先增大后减小,IB逐渐增大,TS逐渐减小。施胶量为63%时,板材的MOR、MOE分别达到最大值15.5 MPa、3 110 MPa,此时,IB、TS分别为0.47 MPa、5.5%。随着热压温度的升高和热压时间的延长,板材的MOR、MOE、IB逐渐增大,TS逐渐减小。热压温度和热压时间分别为100℃、30min时,MOR、MOE、IB分别达到最大值(16.8 MPa、3 350 MPa、0.56 MPa),TS达到最小值(3.5%)。优化制板工艺为m(麦秸)∶m(木材)=4∶6,施胶量63%,热压时间30min,热压温度100℃。
语种:
中文
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稻草纤维填充ABS复合材料的制备及性能研究
作者:
朱凌波;唐钱;李佩琦;李新功
期刊:
中国塑料 ,2017年31(9):73-80 ISSN:1001-9278
作者机构:
[朱凌波; 唐钱; 李佩琦; 李新功] 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:
丙烯腈-丁二烯-苯乙烯共聚物;稻草纤维;木塑复合材料;模压温度;稻草纤维比例;力学性能;流变性能
摘要:
以丙烯腈-丁二烯-苯乙烯共聚物(ABS)树脂为基体,稻草纤维为填充材料,在不添加偶联剂的情况下,通过模压成型法制备了ABS/稻草纤维木塑复合材料。采用万能力学试验机、热失重分析仪、扫描电子显微镜、凝胶渗透色谱仪、旋转流变仪研究了模压温度和纤维含量对ABS/稻草纤维木塑复合材料性能的影响。结果表明,ABS/稻草纤维木塑复合材料的最佳模压温度和最佳纤维比例分别为170℃和100/30;当模压温度为210℃时,稻草纤维碳化严重,其表面硅制层脱落,纤维与树脂的界面结合强度降低,但纤维呈致密的网状结构,有利于冲击应力的吸收;ABS的相对分子质量随模压温度的升高而减小,树脂基体冲击性能增强;当模压温度为170~190℃、纤维含量为30~40份时,纤维在树脂基体中的强度和分散性较好,力学性能较高。
语种:
中文
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麦秸/木材均质复合无机碎料板的阻燃性能研究
作者:
潘亚鸽;朱凌波;唐钱;黄清华;卢立;...
期刊:
功能材料 ,2017年48(5):5164-5168 ISSN:1001-9731
通讯作者:
Zheng, X.
作者机构:
[唐钱; 朱凌波; 潘亚鸽; 郑霞; 李新功; 黄清华; 卢立] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构:
[Zheng, X.] S;School of Materials Science and Engineering, China
关键词:
麦秸;木材;无机胶黏剂;均质碎料板;阻燃抑烟
摘要:
以镁系无机胶粘剂和均匀混合的麦秸和木材碎料为原料,采用热压工艺,制备麦秸/木材均质复合无机碎料板。利用导热系数测定仪、锥形量热仪对比研究了普通有机胶粘剂胶合麦秸板、麦秸无机碎料板、木材无机碎料板以及麦秸/木材均质复合无机碎料板的阻燃抑烟性能。结果表明,与普通有机胶粘剂胶合麦秸板相比,无机胶粘剂能显著降低板材的热释放和烟释放;麦秸/木材均质复合无机碎料板的热释放速率(HRR)、总热释放量(THR)、烟生成速率(SPR)、总烟生成量(TSP)和质量损失均高于麦秸无机碎料板而低于木材无机碎料板,点燃时间(TTI)小于麦秸无机碎料板而大于木材无机碎料板,麦秸/木材均质复合无机碎料板具有良好的阻燃抑烟性能。
语种:
中文
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