文献类型：期刊文献

英文题名：Preparation of the chitosan/poly(glutamic acid)/alginate polyelectrolyte complexing hydrogel and study on its drug releasing property

作者：Chen, Yu[1];Yan, Xiaoting[1];Zhao, Jian[1];Feng, Huaiyu[1];Li, Puwang[2];Tong, Zongrui[1];Yang, Ziming[1,2];Li, Sidong[3];Yang, Jueying[1];Jin, Shaohua[1]

机构：[1]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China;[2]Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China;[3]Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang 524088, Peoples R China

年份：2018

卷号：191

起止页码：8

外文期刊名：CARBOHYDRATE POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000430272200002)、、EI(收录号：20181104901931)、Scopus(收录号：2-s2.0-85043468705)、WOS

基金：This work was supported by the Combination Project of Guangdong Province and the "Yangfan" Innovative Research Team Project of Guangdong Province.

语种：英文

外文关键词：Semi-dissolution/acidification/sol-gel transition; Polyelectrolyte complex; Hydrogel; Natural polymer; Piroxicam; Release

外文摘要：In the current study, a novel semi-dissolution/acidification/sol-gel transition (SD-A-SGT) method was explored for the preparation of polyelectrolyte complexing (PEC) composite hydrogels with natural polymers only. A chitosan (CS) powder was uniformly dispersed in a solution of poly(glutamic acid) (PGA) and alginate (SA) to form a semi-dissolved slurry mixture that was then exposed to an gaseous acidic atmosphere. CS was gradually dissolved and interacted with PGA and SA to form a CS/PGA/SA PEC composite hydrogel with a homogeneous structure. The SD-A-SGT procedure was able to overcome the shortcomings of direct mixing method via the PEC interaction. The effects of the hydrogel composition on its structure and properties were investigated by FTIR, XRD, rheology study, XPS, SEM, and swelling kinetics. The drug delivery performance of the CS/PGA/SA hydrogel was explored using piroxicam (PXC) as a model drug. PXC was in situ embedded in the hydrogel by the SD-A-SGT method. The hydrogel exhibited pH responsive drug release behaviors that were affected by the hydrogel composition. In all, the SD-A-SGT method for preparing PEC composite hydrogels has a great application potential in constructing the CS based hydrogels as medical materials.