文献类型：期刊文献

英文题名：Thermoset nanocomposites from two-component waterborne polyurethanes and cellulose whiskers

作者：Wu, Guo-min[1,2,3,4,5] Chen, Jian[1,2,3,4] Huo, Shu-ping[1,2,3,4] Liu, Gui-feng[1,2,3,4,5] Kong, Zhen-wu[1,2,3,4,5]

第一作者：Wu, Guo-min;吴国民

通信作者：Wu, GM[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[2]Key Lab Biomass Energy & Mat Jiangsu Prov, Nanjing 210042, Jiangsu, Peoples R China;[3]State Forestry Adm, Key & Open Lab Forest Chem Engn, Nanjing 210042, Jiangsu, Peoples R China;[4]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Jiangsu, Peoples R China;[5]Chinese Acad Forestry, Res Inst New Technol, Beijing 10091, Peoples R China

年份：2014

卷号：105

期号：1

起止页码：207-213

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20141017414623);Scopus(收录号：2-s2.0-84894529588);WOS:【SCI-EXPANDED(收录号:WOS:000335289400027)】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (contract grant number: 31100428).

语种：英文

外文关键词：Two-component waterborne polyurethanes; Cellulose nanowhiskers; Nanocomposite; Turpentine

摘要：We prepared thermoset nancomposites from biomass-based two-component waterborne polyurethane (2K-WPU) and cellulose namowhiskers (CNWs). Due to the formation of hydrogen bonds, the viscosity of 2K-WPU dispersion was found to be increased with the addition of CNWs. SEM images showed "sea-island structure" corresponding to the microphase separation between CNWs nano-filler and the 2K-WPU matrix. The a-relaxation temperature (T-alpha) and glass transition temperature (T-g) increased with the increase of CNWs content, which was due to the formation of a rigid CNWs nano-phase acting as crosslinking points in the 2K-WPU matrix. Mechanical properties from tensile test showed Young's modulus and tensile strength of 2K-WPU/CNWs nanocomposites were reinforced by the addition of CNWs. Thermo-stability of 2K-WPU/CNWs nanocomposites decreased slightly with the increase of CNWs content, which could be attributed to the increased thermal conductivity of the material after adding CNWs. (C) 2014 Elsevier Ltd. All rights reserved.