端羟基聚乳酸微球的制备与降解

以1,4-丁二醇和D,L-乳酸为原料,经缩合聚合法制备了端羟基聚乳酸,并用溶剂挥发法制备了端羟基聚乳酸微球。考察了乳化剂浓度、油水相比例及聚乳酸浓度对微球平均粒径和形貌的影响,并在pH=7.4缓冲溶液中进行了微球的降解。结果表明以二氯甲烷为溶剂,PVA作为乳化剂,室温和600 r/min搅拌速度下可制得平均粒径0.5-1.0 m的较均匀的、表面平滑的端羟基聚乳酸微球。随着在pH=7.4下降解时间增加,微球表面变得粗糙。...

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Veröffentlicht in:	Xiàndài huàgōng 2008, Vol.28 (5), p.54-56
1. Verfasser:	石淑先夏宇正李斗杨知微陈晓农焦书科
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Schlagworte:	微球溶剂挥发法端羟基聚乳酸降解
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creator	石淑先夏宇正李斗杨知微陈晓农焦书科
description	以1,4-丁二醇和D,L-乳酸为原料,经缩合聚合法制备了端羟基聚乳酸,并用溶剂挥发法制备了端羟基聚乳酸微球。考察了乳化剂浓度、油水相比例及聚乳酸浓度对微球平均粒径和形貌的影响,并在pH=7.4缓冲溶液中进行了微球的降解。结果表明以二氯甲烷为溶剂,PVA作为乳化剂,室温和600 r/min搅拌速度下可制得平均粒径0.5-1.0 m的较均匀的、表面平滑的端羟基聚乳酸微球。随着在pH=7.4下降解时间增加,微球表面变得粗糙。
doi_str_mv	10.3321/j.issn:0253-4320.2008.05.012
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subjects	微球溶剂挥发法端羟基聚乳酸降解
title	端羟基聚乳酸微球的制备与降解
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