摘要
以正硅酸乙酯(TEOS)为前驱体,采用溶胶-凝胶法原位制备了SiO2/胶原水解物-聚乙烯醇杂化复合膜(SiO2/CH-PVA杂化膜)。通过溶胀、热重(TG)、红外光谱(FTIR)、扫描电镜(SEM)和拉伸实验,考察了SiO2对杂化膜性能的影响。结果表明,SiO2的引入减小了膜的平衡溶胀度,减缓了膜的溶胀速率,有效地抑制了胶原水解物的溶解。红外光谱中Si—O—Si、Si—C键的吸收峰表明形成了交联的有机聚合物/无机杂化体系,SiO2的引入显著地提高了杂化膜的热稳定性和力学性能,当SiO2质量分数由0%增加到20%,杂化膜的抗张强度由18 MPa提高到25 MPa,断裂伸长率由510%提高到780%。
With tetraethoxysilane（TEOS） as precursor,SiO2/collagen hydrolysate-poly（vinyl alcohol） hybrid composite films（SiO2/CH-PVA hybrid films） were in-situ prepared using a sol-gel technique.The influences of SiO2 on properties of hybrid films were investigated by means of swelling,thermogravimetry,FTIR spectroscopy,SEM diagram and tensile tests.The results show that the addition of SiO2 decreases the swelling ratio at equilibrium of hybrid films,slows down the swelling process,and effectively restricts the solubility of collagen hydrolysate in aqueous solution.Both adsorption peaks of Si—O—Si and Si—C in FTIR graphs indicate the formation of organic polymer/inorganic hybrid system,and SiO2 significantly improves thermal properties and mechanical properties of the hybrid films,with the increase of the SiO2 mass fractions from 0% to 20%,tensile strength of the hybrid film increases from 18 MPa to 25 MPa,and the elongation at break increases from 510% to 780%.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第2期59-63,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50973097)
中国科学院力学研究所国家微重力实验室开放课题资助(NML200902)
关键词
杂化复合膜
聚乙烯醇
SIO2
胶原水解物
溶胀速率
hybrid composite film
poly（vinyl alcohol）
SiO2
collagen hydrolysate
swelling ratio
