Surface Biomimetic Waterproof Modification of Chitosan Rod

Abstract

Abstract: In-situ precipitation method was developed to prepare chitosan rod. But high water penetrating rate and large amount of water absorption of chitosan rod limit its practical application as internal fixation of bone fracture. Many terrestrial plants and animals are water-repellent. It was believed that water-repellency is based on the surface roughness caused by different microstructures, together with the waterproof properties of the epicuticular wax. The surface acetylation and bio-ester coating were adopted as the method of surface waterproof modification of chitosan rod. Firstly, a scraggy surface was obtained though the surface acetylation of chitosan rod. Subsequently bio-ester was coated onto the modified surface. Then the final waterproof effect was characterized by contact angle and water absorption rate also. Soaked in the simulated body fluid(SBF) for three months, little mechanical properties attenuation shows that the surface composite modification is a method with a feasibility to improve the waterproof property of the chitosan rod.

Key words: Chitosan, Surface acetylation, Biomimetic, Waterproof, Internal fracture fixation

CLC Number:

O636.1

TrendMD:

HU Qiao-Ling, LEI Yong, ZHANG Zhong-Ming, SHEN Jia-Cong. Surface Biomimetic Waterproof Modification of Chitosan Rod[J]. Chem. J. Chinese Universities, 2005, 26(6): 1162.

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Surface Biomimetic Waterproof Modification of Chitosan Rod

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