壳聚糖/纳米SiO_x复合膜的制备及机械性能  

Preparation and Mechanical Properties of Composite Chitosan/Nano-Sized SiO_x Film

作　　者：王明力[1] 司方[1] 张义明[1] 赵德刚[2] 

机构地区：[1]贵州大学贵州省发酵工程与生物制药重点实验室,贵州贵阳550003 [2]贵州大学绿色农药与农业生物工程教育部重点实验室,贵州贵阳550025

出　　处：《华南理工大学学报（自然科学版）》2008年第7期36-41,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：贵州省优秀科技教育人才省长基金资助项目(200619);贵州省科技攻关项目(NGY065)

摘　　要：采用二次回归旋转正交试验方法,探讨了制备壳聚糖/纳米SiOx复合膜的优化工艺条件,用流延法制得分散比较均匀的纳米复合膜,并对涂膜结构进行红外光谱(IR)、X射线衍射(XRD)及透射电镜(TEM)表征.结果表明:复合膜(CTS-SiOx)中壳聚糖与SiOx粒子表面的大量羟基存在强烈的氢键作用;当配料为壳聚糖1.98 g、SiOx0.017 g、单甘酯0.04 g时,壳聚糖复合涂膜拉伸强度达到最优值、与纯壳聚糖单膜相比,复合膜的拉伸强度、断裂伸长率和直角撕裂强度分别提高了63.3%,45.4%和11.6%,透水率降低了73.1%.可见复合膜的性能优于单膜.The preparation conditions of composite chitosan/nano-sized SiOx （ CTS-SiOx） films were optimized by quadratic-regression rotatable orthogonal experiments, and the films with homogeneous structure were prepared via the casting method, which were then characterized by means of IR, XRD and TEM. The results show that there are a great number of hydrogen bonds between chitosan and the hydroxyls on nano-sized SiOx surface, that the CTS- SiOx film with a chitosan/SiO/glycerel monostearte mass ratio of 1.98： 0. 017：0.04 has a maximum tensile strength, and that, as compared with the chitosan film, the tensile strength, breaking extensibility and orthogonaltear strength of the composite film increase respectively by 63.3% , 45.4% and 11.6% , while the water permeability decreases by 73.1%. It is thus concluded that the composite film is superior to the film with single component.

关 键 词：壳聚糖 复合膜 拉伸强度 二次回归旋转正交试验 

分 类 号：TQ028.1[化学工程]