摘要
通过溶胶-凝胶法,以正硅酸乙酯(TEOS)为硅源、乙醇为溶剂、盐酸为催化剂,在剑麻纤维素微晶(SFCM)表面包覆上了一层连续、致密的二氧化硅(SiO2),制得二氧化硅包覆剑麻纤维素微晶(SiO2-SFCM)。采用红外光谱和扫描电子显微镜对其结构进行表征,并与环氧树脂(EP)复合制备了SiO2-SFCM/EP复合材料,研究了SiO2-SFCM对EP复合材料力学性能的影响。结果表明,SiO2包覆层增强了SFCM与EP之间的界面相互作用,提高了复合材料的力学和热性能。当加入的SiO2-SFCM的质量分数为3%时,复合材料的冲击强度由未改性的16.4 kJ/m2提高到29.4 kJ/m2,热分解温度提高24℃,二氧化硅的包覆率为50%~60%。
Silica coated sisal cellulose microcrystalline( SiO2-SFCM),which has a layer of continuous,dense silica coated the sisal microcrystalline cellulose surface,was prepared by sol-gel method using tetraethylorthosilicate( TEOS)as silica precursor,ethanol as solvent and hydrochloric acid as catalyst. The structure of SiO2-SFCM was characterized by Fourier transform infrared spectroscopy( FT-IR),scanning electron microscope( SEM),and the mechanical properties of the SiO2-SFCM /EP composites were investigated. The results show that the silica layer improves the interfacial interaction between SiO2-SFCM and epoxy resin( EP),which enhances the mechanical and thermal properties of the SiO2-SFCM /EP composites. By adding 3% SiO2-SFCM,the impact strength of the epoxy resin composites increases from16. 4 kJ /m2to 29. 4 kJ /m2and the thermal decomposition temperature of modified systems is also 24 ℃ higher than that of the unmodified system. The cladding rate of silica coated is 50% ~ 60%.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第6期170-173,177,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51163004)
广西自然科学基金资助项目(2013GXNSFAA019308)
有色金属及材料加工新技术教育部重点实验室(12KF-10)
广西高校人才小高地创新团队及广西特聘专家专项经费资助
