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, Central South University of Forestry and Technology, Changsha, China
摘要：
The application of superhydrophobic wood is majorly limited by its durability when subjected to natural conditions. Herein, the stability of two representative superhydrophobic woods (i.e., Poplar (Populus tomentosa) and Chinese fir (Cunninghamia lanceolata)), were prepared via a one-step hydrothermal process using tetrabutyltitanate (Ti(OC4H9)(4), TBOT) and vinyltriethoxysilane (CH2CHSi(OC2H5)(3), VTES) as a co-precursor and sequentially tested under different humidity and temperature conditions. The variables including morphology, water contact angle (WCA), color parameter, chemical components of the surface, and moisture absorption property were characterized using a scanning electron microscope (SEM), WCA measurement, a colorimeter, a Fourier transform infrared (FTIR) spectroscopy, and a moisture absorption test, respectively. It was found that initial static WCAs of superhydrophobic wood were larger than 150 degrees. Micron-sized cracks were formed on the coatings after the alternating humidity and temperature aging cycles. This lowered the water repellency, but the WCA was still greater than 140 degrees. There was nearly no chemical change of wood after the aging test; the color change between the same species of untreated and superhydrophobic wood was very small, only with a difference of 0.42 and 4.05 in overall color change DE/values for Chinese fir and poplar, respectively. The superhydrophobic coatings had a trivial influence on wood moisture absorption property, which only lowered 3% in poplar and 2% in Chinese fir, respectively. (C) 2017 Published by Elsevier B. V. This is an open access article under the CC BY-NC-ND license
作者机构：
[Li, Xingong; Li, Yun; Wu, Yiqiang; He, Xia; Cheng, Xiyi; Li, Xianjun] Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha 410004, Hunan, Peoples R China.;[Liu, Dandan] Nanjing Forestry Univ, Coll Furniture & Ind Design, Nanjing 210037, Jiangsu, Peoples R China.;[Huang, Qiongtao] Yihua Enterprise Grp Co Ltd, Yihua Timber Ind, Shantou 515834, Guangdong, Peoples R China.
通讯机构：
[Li, Xianjun] C;Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha 410004, Hunan, Peoples R China.
关键词：
Dimensional stability;Energy storage and saving;Polyethylene glycol (PEG);Thermal properties;Wood
摘要：
Green fir wood (Pseudotsuga menziesii) was modified with polyethylene glycol (PEG) to produce wood composites for energy storage and conversion. The PEG-modified wood composites were evaluated based on their dimensional stability, durability, and thermal properties by various analytical methods. The differential scanning calorimetry (DSC) results showed the melting temperature and the latent heat of the phase change material (PCM) composite were 26.74 °C and 73.59 J/g, respectively. Thermal cycling tests and thermogravimetric analysis confirmed the composite exhibited good thermal stability, reliability, and chemical stability. All treated specimens were free from noticeable defects, and the addition of a surface varnish coating prevented PEG from leaching. The PEG-modified composites exhibited improved dimensional and thermal performance, which makes this material a potential candidate for economical and green, lightweight building materials.
期刊：
建筑材料学报,2016年19(5):860-865 and 882 ISSN：1007-9629
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[李新功; 吴义强; 张新荔; 朱晓丹; 左迎峰; 李贤军] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[Qiao, Jianzheng; Li, Xingong; Wang, Aijun] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Qiao, Jianzheng] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, 498 Shaoshan South Rd, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Qiao, Jianzheng] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, 498 Shaoshan South Rd, Changsha 410004, Hunan, Peoples R China.
关键词：
Glue-straw ratio;Inorganic binder;Physical and mechanical property;Thermal stability;Wheat-straw composite board
摘要：
With wheat-straw and inorganic binder as the major raw materials, inorganic wheat-straw composite board was manufactured by moldpressing. The effect of wheat-straw loading on the physical and mechanical properties of inorganic wheat-straw composite board was studied. X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) were used to characterize and evaluate the performance of the resulting composite board. Results showed that the optimal glue-straw ratio was 2.1. With the increase in glue-straw ratio during board maintenance, the inhibition effect was weaker during hydration reaction of inorganic materials. This accelerated the process of the hydration reaction in inorganic wheat-straw composite board such that the reaction was carried out more completely and produced more complete crystallization and more inorganic glue. Internal bond strength (IB) and thermal stability of inorganic wheat-straw composite board increased gradually, while TS decreased. Modulus of rupture (MOR) and modulus of elasticity (MOE) firstly increased and then decreased. In summary, the bonding interface between wheat-straw and inorganic adhesive performed well.
作者机构：
[陈茂; 李新功; 潘亚鸽; 唐钱; 朱凌波] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[陈茂; 李新功; 潘亚鸽; 唐钱; 朱凌波] 410004, China
通讯机构：
[Li, X.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
无机杨木刨花板;施胶量;密度;物理力学性能;阻燃抑烟
摘要：
以杨木刨花和无机胶黏剂为主要原料,通过冷压成型工艺制备了无机杨木刨花板,研究了不同施胶量和密度对无机杨木刨花板物理力学性能的影响,通过XRD和SEM分析了不同施胶量及密度对无机杨木刨花板性能的影响机制,同时通过锥型量热仪分析了无机杨木刨花板的阻燃抑烟性能。结果表明:一方面,随着施胶量增大,无机杨木刨花板静曲强度(MOR)和弹性模量(MOE)先增大后减小,同时,内结合强度(IB)逐渐增大,24 h吸水厚度膨胀率(TS)逐渐减小。施胶量为57%时MOR和MOE分别达到最大值21.5 MPa和4 360 MPa,施胶量为65%时IB达到最大值2.61MPa, 24 h TS达到最小值3.36%。随着施胶量增大,燃烧的峰值热释放速率(HRR)降低,HRR到达峰值的时间推迟,总热释放量(THR)和总生烟量(TSP)减少。另一方面,随着密度增大,MOR、MOE均逐渐增大,IB先增大后减小,24hTS先减小后增大,无机杨木刨花板密度为1.1 g/cm~3时IB达到最大值3.54 MPa, 24 h TS达到最小值3.99%。
作者机构：
[刘明; 田翠花; 吴义强; 卿彦; 贾闪闪; 罗莎; 李新功] College of Material Science and Engineering, Centre South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
[Wu, Y.] C;College of Material Science and Engineering, Centre South University of Forestry and Technology, Changsha, China
作者机构：
[Li, Xingong; Li, Yun; Wu, Yiqiang; Li, Xianjun] Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha 410004, Hunan, Peoples R China.;[Huang, Qiongtao] Yihua Enterprise Grp Co Ltd, Yihua Timber Ind, Shantou 515834, Guangdong, Peoples R China.;[Chen, Zhangjing] Virginia Tech Univ, Dept Sustainable Biomat, Blacksburg, VA 24061 USA.
通讯机构：
[Li, Xianjun] C;Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha 410004, Hunan, Peoples R China.
关键词：
Dimensional stability;Impregnation;Microcrystalline wax;Surface hardness;Swelling and shrinkage extent
摘要：
Air-dried rosewood (Aniba rosaeodora) samples with sizes of 50 mm (length) by 50 mm (width) by 20 mm (thickness) were pretreated with NaOH to increase their permeability. The specimens were then impregnated with microcrystalline wax at a temperature of 100 °C to obtain various weight gains at four treatment durations. After impregnation, the swelling and shrinkage extents and surface hardness of the rosewood were measured. The results showed that, compared with untreated specimens, the linear swelling extent, volumetric swelling extent, and linear shrinkage extent of the impregnated specimens decreased by 75.23%, 59.85%, and 80.70%, respectively, and the surface hardness of the treated specimens increased by 43.36%. The impregnation with wax significantly increased the dimensional stability and surface hardness of the rosewood.
作者机构：
[李新功; 吴义强; 符彬; 袁光明; 陈卫民] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China;[陈卫民] College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, China
通讯机构：
[Li, X.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
