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

作     者：Fei Song Puyou Jia Caiying Bo Xiaoli Ren Lihong Hu Yonghong Zhou 

作者机构：Institute of Chemical Industry of Forest ProductsChinese Academy of ForestryNational Engineering Laboratory for Biomass Chemical UtilizationCo-Innovation Center of Efficient Processing and Utilization of Forest ResourcesKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationKey Laboratory of Biomass Energy and MaterialsNanjing210042China Nanjing Forestry UniversityNanjing210037China 

出 版 物：《Journal of Renewable Materials》 (可再生材料杂志（英文）)

年 卷 期：2020年第8卷第5期

页      面：535-547页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070303[理学-有机化学] 0706[理学-大气科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the financial support from the Fundamental Research Funds for the Central Non-profit Research Institution of CAF(No.CAFYBB2018MA001) the National Natural Science Foundation of China(Grant No.31700499). 

主　　题：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 1H 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.