摘要
为了实现茶剩余物的资源高值化利用,以茶梗纤维(TSF)为原料,用扩链剂4,4'-二苯基甲烷二异氰酸酯(4,4'-MDI)对其进行表面改性,将4,4'-MDI改性后的茶梗纤维(MDI-TSF)与聚对苯二甲酸-己二酸丁二醇酯(PBAT)共混制备复合材料。4,4'-MDI两端异氰酸酯键(―N=C=O)与TSF表面羟基(―OH)进行反应,减少TSF表面羟基含量并削弱其表面极性,从而减少了TSF与PBAT之间的极性差,环氧大豆油(ESO)加入改善两者之间界面相容性,从而可提高复合材料的机械性能。改性茶梗纤维MDI-TSF的加入可以有效增强复合材料的拉伸强度、弯曲强度以及热稳定性,当PBAT与MDI-TSF质量比80∶20,即MDI-TSF添加量20%,加入10%ESO制得的复合材料PBAT/ESO/20%MDI-TSF综合力学性能最佳,拉伸强度、弯曲强度和冲击强度分别为13.014 MPa、10.94 MPa和18.314 kJ/m^(2),与复合材料PBAT/ESO/20%TSF(8.652 MPa,8.32 MPa,14.563 kJ/m^(2))相比,拉伸强度提高了50.4%,弯曲强度提高了31.5%,冲击强度提高了25.8%,热稳定性和结晶度均有提高。
In order to realize the resource high value utilization of tea residue,tea stalk fiber(TSF)was used as raw material to modify its surface with chain extender 4,4'-diphenylmethane diisocyanate(4,4-MDI).The 4,4-MDI modified tea stalk fiber(MDI-TSF)was blended with polyterephthalate-butanediol adipate(PBAT)to prepare the composite.The isocyanate bond(—N=C=O)at both ends of 4,4'-MDI reacted with the hydroxyl group(—OH)on the surface of TSF,reducing the hydroxyl group content on the surface of TSF and weakening its surface polarity,thereby reducing the polarity difference between TSF and PBAT.The addition of ESO improved the interface compatibility between TSF and PBAT,thereby improving the mechanical properties of the composites.The addition of modified tea stalk fiber MDI-TSF could effectively enhance the tensile strength,bending strength and thermal stability of the composites.When the mass ratio of PBAT to MDI-TSF was 80∶20,the composite material PBAT/ESO/20%MDI-TSF prepared by adding 20%MDI-TSF and 10%ESO had the best comprehensive mechanical properties,and the tensile strength,bending strength and impact strength were 13.014 MPa,10.94 MPa and 18.314 kJ/m^(2),respectively.Compared with the composite of PBAT/ESO/20%TSF(8.652 MPa,8.32 MPa,14.563 kJ/m^(2)),the tensile strength,bending strength and impact strength were increased by 50.4%,31.5%and 25.8%,respectively,and the thermal stability and crystallinity were also improved.
作者
潘浩津
何素萍
洪国隆
KEHINDE Olonisakin
李燃
杨文斌
PAN Haojin;HE Suping;HONG Guolong;KEHINDE Olonisakin;LI Ran;YANG Wenbin(College of Materials Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Xiamen HuaXiangyuan Tea Industry Co.,Ltd.,Xiamen 361007,China)
出处
《生物质化学工程》
CAS
2024年第3期17-24,共8页
Biomass Chemical Engineering
基金
中央引导地方科技发展资金项目(2022L3006)
厦门华祥苑茶业股份有限公司资助基金(KH210200A)。
关键词
聚对苯二甲酸-己二酸丁二醇酯
界面相容
复合材料
polyterephthalate-butanediol adipate
interfacial compatibility
composite material
作者简介
潘浩津(1999-),男,安徽池州人,硕士生,主要从事生物质复合材料制备与性能研究工作;通讯作者:杨文斌,教授,研究领域:生物质复合材料,E-mail:fafuywb@163.com。
