首页> 外文会议>Pacific Rim International Conference on Advanced Materials and Processing; 20071105-09; Jeju Island(KR) >pH-sensitivity of N-carboxyethyl Chitosan Hydrogel and Drug Controlled Release in vitro
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pH-sensitivity of N-carboxyethyl Chitosan Hydrogel and Drug Controlled Release in vitro

机译:N-羧乙基壳聚糖水凝胶的pH敏感性和体外控释

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N-carboxyethyl chitosan (ACS) was formed by a Micheal reaction. Through the analysis of IR and ~1H-NMR spectra, the Micheal reaction was carried out between - NH_2 of chitosan and - C = C - of acrylic acid. ACS hydrogel (ACSG) was prepared by cross-linking with glutaraldehyde. ACSG show pH-sensitive swelling behavior, and the smallest swelling rate (SR) of ACSG is in pH5.0 buffer solution. With dosage of glutaraldehyde increasing, the SR of ACSG decreased. With grafting degree (GD) increasing, the SR of ACSG increased first and decreased afterward. Using bovine serum albumin (BSA) as a model medicine, the releasing behaviors of ACSG were investigated in vitro. In simulated gastric and intestinal fluid, the ACSG loading BSA (GD=20.45%) has better releasing behaviors.
机译:N-羧乙基壳聚糖(ACS)通过Micheal反应形成。通过红外光谱和〜1H-NMR谱分析,壳聚糖的-NH_2与丙烯酸的-C = C-之间发生了缩醛反应。通过与戊二醛交联制备ACS水凝胶(ACSG)。 ACSG显示出对pH敏感的溶胀行为,并且ACSG的最小溶胀率(SR)在pH5.0缓冲溶液中。随着戊二醛用量的增加,ACSG的SR降低。随着接枝度(GD)的增加,ACSG的SR先增加后减少。以牛血清白蛋白(BSA)为模型药物,体外研究了ACSG的释放行为。在模拟的胃液和肠液中,ACSG负载的牛血清白蛋白(GD = 20.45%)具有更好的释放性能。

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