文献类型：期刊文献

英文题名：Preparation and Characterization of Tung Oil Toughened Modified Phenolic Foams with Enhanced Mechanical Properties and Smoke Suppression

作者：Song, Fei[1,2] Jia, Puyou[1] Bo, Caiying[1] Ren, Xiaoli[1] Hu, Lihong[1] Zhou, Yonghong[1]

第一作者：Song, Fei

通信作者：Jia, PY[1];Zhou, YH[1]

机构：[1]Chinese Acad Forestry, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Inst Chem Ind Forest Prod,Natl Engn Lab Biomass C, Key Lab Chem Engn Forest Prod,Natl Forestry & Gra, Nanjing 210042, Peoples R China;[2]Nanjing Forestry Univ, Nanjing 210037, Peoples R China

年份：2020

卷号：8

期号：5

起止页码：535-547

外文期刊名：JOURNAL OF RENEWABLE MATERIALS

收录：;EI(收录号：20212810629853);Scopus(收录号：2-s2.0-85084368611);WOS:【SCI-EXPANDED(收录号:WOS:000530129300005)】；

基金：The authors are grateful to the financial support from the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (No. CAFYBB2018MA001) and the National Natural Science Foundation of China (Grant No. 31700499).

语种：英文

外文关键词：Tung oil; Friedel-Craft reaction; phenolic foams; mechanical properties; smoke suppression

摘要：In this study, we prepared a series of tung oil phenolic foams (TPF) by a one-pot method. The FT-IR and H-1 NMR spectra confirm the successful Friedel-Crafts grafting of phenol to the long-chain alkyl group in tung oil. Modified TPFs exhibit enhanced mechanical properties, including compressive and flexural strengths of up to 0.278 +/- 0.036 MPa and 0.450 +/- 0.017 MPa, respectively, which represent increases of 68.75% and 86.72% over those of pure phenolic foam (PF). SEM spectra reveal the TPF microstructure to have uniform hexagonal cell morphology, narrower cell size distribution, and smaller mean cell size, suggesting enhanced mechanical properties. The TPF total smoke release decreased by 74.23%, indicating that the long alkyl chain significantly improves smoke suppression of the combusting foam. However, due to the flammability of the alkyl chains, the TPF limiting oxygen index decreases with increasing tung oil content. Moreover, TPF exhibits reduced thermal stability and high-temperature charring rate, elevated peak and mean heat release rates, and higher total heat release compared with pure PF. Therefore, future research will focus on the use of tung oil modified flame retardant to provide more robust phenolic foams.