正硅酸乙酯溶胶-凝胶制备壳聚糖-SiO_2杂化材料  

Preparation of Chitosan-SiO_2 Hybrid Composite Material via Tetraethy Loxy Silane Sol-Gel Process

作　　者：崔少伟[1] 唐正华[1] 葛建芳[1] 

机构地区：[1]仲恺农业工程学院化学化工学院,广东广州510225

出　　处：《中北大学学报（自然科学版）》2012年第3期313-319,共7页Journal of North University of China(Natural Science Edition)

摘　　要：用共混法和原位杂化法分别合成了壳聚糖-SiO2杂化材料,研究了投料比对壳聚糖-SiO2杂化材料的结构以及耐水性、力学性能、Cu2+吸附性的影响.结果表明:与纯壳聚糖相比,共混法和原位杂化法合成的杂化膜材料的吸水倍率最高时分别比纯壳聚糖提高了108.3%和11.1%;共混法合成的杂化膜材料拉伸断裂强度随mTEOS/m壳聚糖的增加先增大后减小,而原位杂化法的则是随mTEOS/m壳聚糖的增加一直增大,分别比纯壳聚糖膜提高了19.9%和20.3%.同时,随着mTEOS/m壳聚糖的增大,两种方法制备的杂化材料的断裂伸长率均下降;而随着mTEOS/m壳聚糖值的增大,共混法合成的杂化膜对Cu2+的吸附能力则是先增强后逐渐降低,而原位杂化法的则一直降低.TGA分析表明:SiO2的引入并未改变壳聚糖的降解机理.SEM分析表明:复合材料是以纳米尺度的SiO2增强的杂化膜材料.Chitosan-SiO2 hybrid materials were prepared by the methods of blending and original hybrid respectively.The effects of the feed ratio of TEOS to chitosan on the structures and properties which included moisture resistance,mechanical,Cu2+ adsorption of the hybrid materials were studied.The results indicated that the materials' highest water adsorption rate prepared by blending and originally hybrid the increase 108.3% and 11.1% respectively compared to the pure chitosan film material.As regarding to the tensile strength,the material prepared by blending the highest increase rate was 19.9% and originally hybrid's was 20.3% compared to the pure chitosan film material;with the increasing of the value of mTEOS/mchitosan,the tensile strength value of the material prepared by blending increased firstly then decreased but the originally hybrid's increased directly.At the same time,with the increasing of the value of mTEOS/mchitosan,the elongation value of the materials which were prepared by blending and originally hybrid both decreased.As to the adsorption ability to Cu2+,with the increasing of the value of mTEOS/mchitosan,the adsorption value of the material prepared by blending increased firstly then decreased and the materials prepared by originally hybrid decreased all the time.The results of the TGA test showed that the materials' degradation mechanism kept unchanged with the introduction of SiO2.The test of SEM indicated that the composite film materials were enhanced by nano SiO2.

关 键 词：壳聚糖-SiO2杂化材料 溶胶凝胶 杂化 壳聚糖 正硅酸乙酯 

分 类 号：O631[理学—高分子化学]