文献类型：期刊文献

英文题名：Effect of lignin-containing cellulose nanofibrils on the curing kinetics of polymeric diphenylmethane diisocyanate (PMDI) resin

作者：Wu, Guomin[1,2,3,4,5] Feng, Xinhao[6] Jin, Can[1,2,3,4,5] Kong, Zhenwu[1,2,3,4,5] Wang, Siqun[6]

第一作者：Wu, Guomin;吴国民

通信作者：Kong, ZW[1];Kong, ZW[2];Kong, ZW[3];Kong, ZW[4];Kong, ZW[5];Wang, SQ[6]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing, Jiangsu, Peoples R China;[2]Natl Engn Lab Biomass Chem Utilizat, Nanjing, Jiangsu, Peoples R China;[3]State Forestry Adm, Key & Open Lab Forest Chem Engn, Nanjing, Jiangsu, Peoples R China;[4]Key Lab Biomass Energy & Mat, Nanjing, Jiangsu, Peoples R China;[5]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210042, Jiangsu, Peoples R China;[6]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA

年份：2019

卷号：73

期号：9

起止页码：879-887

外文期刊名：HOLZFORSCHUNG

收录：;EI(收录号：20191706837527);Scopus(收录号：2-s2.0-85064609114);WOS:【SCI-EXPANDED(收录号:WOS:000480415200009)】；

基金：This work was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of Chinese Academy of Forestry (CAFYBB2018GD002), the SDSU Sungrant Regional Program [A18-0659] and the USDA National Institute of Food and Agriculture [Hatch project 1012359].

语种：英文

外文关键词：cellulose nanofibrils; curing kinetics; diphenylmethane diisocyanate; lignin

摘要：In order to increase the curing rate of polymeric diphenylmethane diisocyanate (PMDI) resin, different contents of lignin-containing cellulose nanofibrils (L-CNFs) were blended into the PMDI. Differential scanning calorimetry (DSC) was used to examine how the addition of L-CNFs influences the curing kinetics of PMDI resin. The activation energy (E-a) of the curing reaction of PMDI/L-CNF systems was calculated using the Kissinger, Friedman and Flynn-Wall-Ozawa model-free methods. The results showed that E-a values calculated by the aforementioned three methods varied in a similar trend with the increase in the L-CNF content. Adding L-CNFs could decrease the E-a value of the curing reaction of PMDI and speed up the curing reaction. The acceleration of the cure rate of the PMDI resin upon the addition of L-CNIFs may be attributable to the effective dispersion of the L-CNFs into the PMDI resin as well as the reaction between the hydroxyl (-OH) groups of the L-CNFs and the isocyanate (-NCO) groups of the PMDI.