项目名称: 单封端PEG-CHO改性明胶延缓软胶囊老化的机理研究
项目编号: No.81202931
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 医学八处
项目作者: 杜茂波
作者单位: 中国中医科学院中药研究所
项目金额: 22万元
中文摘要: 单封端PEG-CHO改性明胶是将醛类物质引入到聚乙二醇中,制成端醛基聚乙二醇,再与明胶作用得到的一种改性明胶,具有凝胶性能好、机械性能好、亲水性好及无自由氨基的特点。其可以从根本上解决因明胶发生氨缩醛反应导致的老化问题,并能增强明胶的亲水性。模型药选择2010版药典软胶囊品种-元胡止痛软胶囊,由醋延胡索、白芷两位药组成。课题通过对单封端PEG-CHO改性明胶软胶囊的制备工艺与表征进行研究,建立软胶囊质量评价体系;通过对不同影响因素下放置的单封端PEG-CHO改性明胶软胶囊崩解、溶出的考察,探讨不同影响因素对其延缓老化的影响;通过对比研究单封端PEG-CHO改性明胶软胶囊与明胶软胶囊,在不同影响因素下,氨基残基数、溶胀速率、明胶官能团、凝胶膜流体力学半径、明胶玻璃化温度(Tg)、胶皮-水扩散系数及其结构表征的变化,揭示单封端PEG-CHO改性明胶延缓软胶囊老化的机理。
中文关键词: 单封端PEG-CHO;改性明胶;老化;机理;
英文摘要: PEG-CHO monoblcok Modified gelatin is dirived from the reaction Aldehydes with PEG 400 and gelatin,its has the characteristics of gel properties and good mechanical properties, hydrophilicity and no free amino.It can Fundamentally solve the problem caused by Ammonia Acetalization Reaction,and enhance the hydrophilic nature of gelatin.Yuanhu Zhitong soft Capsule is selected as the module drug,including Corydalis Rhizoma and Angelicae Dahuricae Radix,was contained in the Pharmacopoeia 2010 Editioncon.The research on the preparation and characterization of PEG-CHO monoblcok Modified gelatin is to establish the quality evaluation system of soft capsule;the study on the disintegration, dissolution about PEG-CHO monoblcok Modified gelatin is to investigate influences of different factors;the contrast research of PEG-CHO monoblcok Modified gelatin soft capsule and gelatin capsule about Amino residues、Swelling ratio、Gelatin functional groups、Hydrodynamic radius of the gel film、The glass transition temperature(Tg)、Gelatin - water diffusion coefficient and Structural characterization,is to reveal the mechanism reasearch on PEG-CHO monoblock modified gelatin slowing down the aging problem of soft capsule.
英文关键词: PEG-CHO monoblock;Modified gelatin;aging;Mechanism;