摘要
为提高秸秆粉与聚己二酸/对苯二甲酸丁二酯(PBAT)的相容性及力学性能,以4-三氟甲基苯甲酰氯(PTF-BOC)为酯化剂,4-二甲氨基吡啶(DMAP)为催化剂,三乙胺为缚酸剂制备酯化秸秆粉。利用转矩流变仪熔融共混制备PBAT和不同PTF-BOC用量秸秆粉的复合材料,采用差示扫描量热仪、旋转流变仪、微机控制电子拉伸试验机和冲击试验机测试了复合材料的热性能、流变性能和力学性能。探究了PTF-BOC用量对秸秆粉中羟基取代度的影响,并对酯化前后秸秆粉进行了傅里叶变换红外结构表征及接触角测试。结果表明,PTF-BOC与秸秆粉成功发生酯化反应,酯化后秸秆粉接触角与PBAT的接触角相近,且较未改性秸秆粉接触角提高70.4%,疏水性提高。酯化秸秆粉与PBAT呈现较好的相容性,当PTF-BOC为秸秆粉质量的55%时,PBAT/酯化秸秆粉复合材料的力学性能最佳,其拉伸强度、断裂伸长率和冲击强度较PBAT/未改性秸秆粉复合材料分别提高28.8%,319%和41.8%。
In order to improve the compatibility and mechanical properties of straw powder and polyadipic acid/butylene terephthalate(PBAT),the esterified straw powder was prepared with 4-trifluoromethylbenzoyl chloride(PTF-BOC)as esterification agent,4-dimethylaminopyridine(DMAP)as catalyst and triethylamine as acid binding agent.The composites of PBAT and straw powder with different amounts of PTF-BOC were prepared by melt blending with torque rheometer.The thermal properties,rheological properties and mechanical properties of the composites were tested with differential scanning calorimeter,rotary rheometer,computer-controlled electronic tensile tester and impact tester.The effect of the amount of PTF-BOC on the degree of hydroxyl substitution in straw powder was investigated,and the infrared structure and contact angle of straw powder before and after esterification were characterized.The results showed that PTF-BOC and straw powder were successfully esterified.After esterification,the contact angle of straw powder was similar to that of PBAT,and the contact angle was 70.4%higher than that of unmodified straw powder,and the hydrophobicity was improved.Esterified straw powder has good compatibility with PBAT.When the content of PTF-BOC(the percentage of straw powder mass)is 55%,the mechanical properties of PBAT/esterified straw powder composite are the best,and its tensile strength,elongation at break and impact strength are 28.8%,319%and 41.8%higher than that of PBAT/unmodified straw powder composite.
作者
葛铁军
张力
文起东
文博
刘沛含
唐恺鸿
Ge Tiejun;Zhang Li;Wen Qidong;Wen Bo;Liu Peihan;Tang Kaihong(Research Center of Plastics Engineering,Shenyang Institute of Chemical Technology,Shenyang 110142,China;Liaoning Province Polymer Engineering Technology Research Center,Shenyang 110142,China;Liaoning Dongsheng New Material Research and Development Center Co.Ltd.,Yingkou 115004,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2023年第3期34-39,共6页
Engineering Plastics Application
基金
基于分子设计的高性能生物质降解材料PBAT-X合成关键技术项目[辽科发(2022)41号]。
关键词
4-三氟甲基苯甲酰氯
酯化改性
秸秆粉
复合材料
4-trifluoromethylbenzoyl chloride
desertification modification
straw powder
composite material
