CN1328316C - 生物活性降解膜的制备方法 - Google Patents
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Abstract
本发明提供了一种生物活性降解膜的制备方法,所要解决的技术问题是:目前制备生物降解聚合物的原料常用的是聚乳酸和壳聚糖,聚乳酸合成的条件要求较高,多半采用进口的,价格昂贵;由聚乳酸制成的降解膜在体内降解时间很长,所以国内不常使用。本发明的要点是:明胶完全溶于PBS溶液中,配成0.3-5%溶液;壳聚糖完全溶于柠檬酸—磷酸缓冲液中,配成0.5-5%溶液;聚乙烯醇溶于双蒸水中,配成3-15%溶液,使其完全溶解呈无色透明的胶状;取明胶溶液、壳聚糖溶液、聚乙烯醇溶液,这三种溶液按4-8∶2-7∶3-7比例完全混合后,铺在玻璃板上,室温下自然干燥成膜。本发明的积极效果是:具有理想的缓释生物活性物质的作用,并在体内较快降解。
Description
技术领域
本发明涉及生物活性降解膜的制备方法
背景技术
生物降解聚合物是一种人工合成的有机物化合物,在体内可降解吸收、无毒、无蓄积,有较好的生物相容性,现已广泛应用于可吸收缝线,药物的缓释载体,接骨板和固定螺丝等。特别是作为药物缓释载体的研究为人关注。药物控制释放系统中生物降解高分子载体的作用,是使药物能以零级动力学速率或其它可控速率释放药物,随之药物释放的殆尽,高分子载体本身也就降解成小分子物质,并被人体所吸收或排除体外。通常用于药物控释的高分子载体主要聚酯类和一氨基酸类,主要是某些化学物质通过结构修饰或采用制剂学手段来控制药物释放的速率,延长药物作用时间。目前研究较多的是制成微球、微囊、中空纤维等形式,将药物包裹在其中,通过注射给药。制成降解膜的形式研究的不多。
制成生物降解膜主要分为二大类,一类是单独制成生物降解膜,不加入任何药物或活性物质,此膜可作为外科损伤组织间的机械屏障,预防腹部手术后组织粘连;也可作为膜引导组织再生技术在口腔颌面外科和骨科中应用,它创造一个屏障环境,防止结缔组织生长、引导骨再生,修复骨组织缺损。另一类是制备出含有药物或活性物质的降解膜,此类文献报道很少。
目前制备生物降解聚合物的原料常用的是聚乳酸和壳聚糖,聚乳酸合成的条件要求较高,多半采用进口的,价格昂贵;由聚乳酸制成的降解膜在体内降解时间很长,所以国内不常使用。
发明内容
本发明的目的在于提供一种含有生物活性降解膜的制备方法。用此方法制备出的生物活性降解膜可避免上述不足。
本发明的目的是这样实现的:以壳聚糖为主要原料,同时加入相关物质,制备出无色无味、柔软、半透明、具有一定的机械强度、一定弹性和韧性的膜状物。能够溶于水,但湿强度较好、抗拉性能好,便于手术中使用。最终降解产物为氨基葡萄糖是人体存在的物质,因而生物相容性好,无毒副作用。
本发明的制备方法是:
1、明胶完全溶于平衡盐溶液PBS溶液中,配成0.3-5%溶液.
2、壳聚糖完全溶于柠檬酸-磷酸缓冲液中,配成0.5-5%溶液.
3、聚乙烯醇溶于双蒸水中,配成3-15%溶液,使其完全溶解呈无色透明的胶状。
4、取明胶溶液、壳聚糖溶液、聚乙烯醇溶液,这三种溶液按4-8∶2-7∶3-7比例完全混合后,铺在玻璃板上,室温下自然干燥成膜。
本发明与现有技术相比,具有理想的缓释生物活性物质的作用,并在体内较快降解。具体特点是:
1、降解膜中含有生物活性物质,并保存其活性,是理想的载体。
2、生物降解膜非壳聚糖单一组分制成,加入相关物质使缓释速度加快,提高降解率。在体内降解时间为35天左右。
3、作为药物载体具有理想的缓释率。
4、保证该活性物质一定缓释速率的前提下,加入有关物质增加膜的韧性、强度和光泽,在水中湿强度较好,便于在手术中使用。
下面结合实施例进一步说明本发明。
具体实施方式
1、明胶完全溶于平衡盐溶液PBS溶液中,配成3%溶液.
2、壳聚糖完全溶于柠檬酸-磷酸缓冲液中,配成3%溶液.
3、聚乙烯醇溶于双蒸水中,配成10%溶液,使其完全溶解呈无色透明的胶状。
4、取明胶溶液、壳聚糖溶液、聚乙烯醇溶液,这三种溶液按6∶5∶5比例完全混合后,铺在玻璃板上,室温下自然干燥成膜。
Claims (2)
1、一种生物活性降解膜的制备方法,其特征是:
(1)、明胶完全溶于平衡盐溶液PBS溶液中,配成0.3-5%溶液;
(2)、壳聚糖完全溶于柠檬酸-磷酸缓冲液中,配成0.5-5%溶液;
(3)、聚乙烯醇溶于双蒸水中,配成3-15%溶液,使其完全溶解呈无色透明的胶状;
(4)、取明胶溶液、壳聚糖溶液、聚乙烯醇溶液,这三种溶液按4-8∶2-7∶3-7比例完全混合后,铺在玻璃板上,室温下自然干燥成膜。
2、按照权利要求1所述生物活性降解膜的制备方法,其特征是:
(1)、明胶完全溶于平衡盐溶液PBS溶液中,配成3%溶液;
(2)、壳聚糖完全溶于柠檬酸-磷酸缓冲液中,配成3%溶液;
(3)、聚乙烯醇溶于双蒸水中,配成10%溶液,使其完全溶解呈无色透明的胶状;
(4)、取明胶溶液、壳聚糖溶液、聚乙烯醇溶液,这三种溶液按6∶5∶5比例完全混合后,铺在玻璃板上,室温下自然干燥成膜。
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101372820B (zh) * | 2007-08-21 | 2010-11-17 | 马铁良 | 一种香烟自熄液及其制备方法 |
CN102125811B (zh) * | 2011-01-10 | 2012-09-05 | 杭州水处理技术研究开发中心有限公司 | 一种聚乙烯醇-壳聚糖纳滤膜的制备方法 |
CN102585264B (zh) * | 2012-01-20 | 2013-06-05 | 河南科技大学 | 一种用无机蒙脱土改良的明胶/pva复合膜的制备方法 |
CN102585263B (zh) * | 2012-01-20 | 2013-06-05 | 河南科技大学 | 一种用有机蒙脱土改良的明胶/pva复合膜的制备方法 |
CN115895053B (zh) * | 2022-08-04 | 2024-03-26 | 盐城工学院 | 一种生物可降解膜及其制备方法和应用 |
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JPS529070A (en) * | 1975-07-11 | 1977-01-24 | Mitsubishi Monsanto Chem | Process for molding polyvinyl chloride foam |
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2004
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Patent Citations (7)
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JPS529070A (en) * | 1975-07-11 | 1977-01-24 | Mitsubishi Monsanto Chem | Process for molding polyvinyl chloride foam |
CN1063425A (zh) * | 1992-01-17 | 1992-08-12 | 厦门大学 | 高效分离膜的制作法 |
CN1111652A (zh) * | 1994-05-10 | 1995-11-15 | 池洪 | 可生物降解无污发泡水基材料 |
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Title |
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