摘要
以天然竹纤维粉(BF)为原料,分别通过氢氧化钠和十六烷基三甲氧基硅烷(HTES)改性竹纤维,然后分别将天然和改性竹粉与聚丙烯(PP)复合挤出制备竹纤维增强PP复合材料。采用傅里叶变换红外光谱(FTIR)及水接触角(WCA)表征了天然竹粉和改性竹粉的表面化学结构及亲疏水性能;研究了添加5%的竹粉时PP复合材料力学性能。结果表明,硅烷偶联剂成功接枝到竹纤维表面,竹粉WCA由26.4°提高到107.8°;热变形实验结果显示添加未改性竹粉后,纯PP的热变形温度由78.3℃降到74℃,但是添加HTES改性竹粉后,PP复合材料的热变形温度提高到86.9℃,另外,与未改性竹粉相比,HTES改性竹粉能够显著提高PP的拉伸强度、冲击强度及弯曲模量。
Natural bamboo flour(BF)was modified by sodium hydroxide(NaOH)and hexadecyl trimethoxysilane(HTES),then the pristine and modified BF were mixed with PP to prepare polypropylene(PP)composites by extruding method,respectively.Fourier transform infrared spectroscopy(FTIR)and water contact angle(WCA)tests were used to characterize the surface chemical structure and hydrophilic/hydrophobic properties of the fiber.The mechanical properties of PP composites with 5%of bamboo powder were studied.The results show that HTES is successfully grafted onto the surface of bamboo fiber and the WCA of the fiber surface increases from 26.43°to 107.8°.The results of thermal deformation tests show that blending nature BF reduces the thermal deformation temperature of pure PP from 78.3℃to 74℃.And the thermal deformation temperature of PP composite material increases to 86.9℃by the addition of HTES modified BF.In addition,comparing with unmodified BF,HTES modified BF can significantly improve the tensile strength,impact strength and bending modulus of PP composites.
作者
杜西兰
熊一鸣
靳进波
宋季岭
龙雪彬
DU Xi-lan;XIONG Yi-Ming;JIN Jin-bo;SONG Ji-Ling;LONG Xue-bin(Guizhou Materials Industry Technology Research Institute,Guiyang 550014,China;Guizhou Materials Technology Innovation Base,Guiyang 550014,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第8期114-117,共4页
China Plastics Industry
基金
贵州省白云区科技计划项目(白科合同[2019]18号)
贵州省科技厅科技计划项目(黔科合支撑[2020]2Y019号)。
关键词
竹粉
十六烷基三甲氧基硅烷
聚丙烯复合材料
力学性能
Plant Fiber
Hexadecyl Trimethoxysilane
Polypropylene Composites
Mechanical Properties
