摘要
目的以阔叶浆为原料制备改性微纤化纤维素,并将其用于增强丙烯腈-丁二烯-苯乙烯共聚物(ABS)。方法采用共研磨的方式,以Ca(OH)_(2)为研磨助剂和润胀剂,将阔叶浆解离成微纤化纤维素(MFC),再经碳酸化和硬脂酸钠改性后制得硬脂酸钙包覆的微纤化纤维素(CS-MFC)。然后采用溶剂浇铸法将CS-MFC以不同比例添加到ABS中,经双螺杆混合挤出和硫化机压片后制得CS-MFC/ABS复合材料,测定MFC、CS-MFC和CS-MFC/ABS复合材料的性能。结果氢氧化钙具有显著的助研磨作用,得到的CS-MFC中硬脂酸钙以物理吸附的方式包覆在MFC表面,水接触角由18.2°提升到72.3°。将CS-MFC添加到ABS基体中,当CS-MFC的质量分数为5%时,复合材料的拉伸强度达到38.0MPa,增幅为15.5%;当CS-MFC的质量分数为10%时,复合材料的弹性模量达到1.72GPa,增幅为5.5%;CS-MFC对ABS的热稳定性影响较小。结论经共研磨及硬脂酸钠改性得到的CS-MFC能有效提升ABS的拉伸强度和弹性模量,有利于提高ABS的应用性能。
The work aims to prepare modified microfibrillated cellulose from broad-leaved pulp and use it to enhance acrylonitrile-butadiene-styrene(ABS).The broad-leaved pulp was dissociated into microfibrillated cellulose(MFC)by co-grinding with Ca(OH)_(2) as grinding aid and swelling agent,and then modified by carbonization and sodium stearate to obtain calcium stearate-coated microfibrillated cellulose(CS-MFC).Then,CS-MFC was added to ABS in different proportions by solvent casting method,and CS-MFC/ABS composites were prepared by twin-screw mixed extrusion and vulcanizing machine pressing method.The properties of MFC,CS-MFC and CS-MFC/ABS composites were measured.The calcium hydroxide had a significant grinding aid effect and the calcium stearate in the obtained CS-MFC was coated on the surface of MFC by physical adsorption,and the water contact angle increased from 18.2°to 72.3°.CS-MFC was added to the ABS matrix and when the addition amount of CS-MFC was 5%,the tensile strength of the composite reached 38.0 MPa,an increase of 15.5%.When the addition amount was 10%,the elastic modulus reached 1.72 GPa,an increase of 5.5%.CS-MFC had little effect on the thermal stability of ABS.The CS-MFC obtained by co-grinding and sodium stearate modification can effectively improve the tensile strength and elastic modulus of ABS,which is conducive to improving the application performance of ABS.
作者
彭旋华
陈京环
刘金刚
赵涛
肖贵华
刘文波
许传波
杜秀
PENG Xuanhua;CHEN Jinghuan;LIU Jingang;ZHAO Tao;XIAO Guihua;LIU Wenbo;XU Chuanbo;DU Xiu(China National Pulp and Paper Research Institute Co.,Ltd.,Beijing 100102,China;National Engineering Lab for Pulp and Paper,Beijing 100102,China;Sinolight Specialty Fiber Products Co.Ltd.,Hebei Langfang 065001,China)
出处
《包装工程》
北大核心
2025年第3期50-57,共8页
Packaging Engineering
