丙烯酸接枝壳寡糖生物可降解交联剂的合成与表征  被引量:2

Synthesis and Characterization of Chitosan Oligosaccharide-graft-Acrylic Acid Biodegradable Crosslinker

在线阅读下载全文

作  者:苏宇佳[1] 赵骞[1] 孙建中[1] 

机构地区:[1]浙江大学化学工程与生物工程学系化学工程联合国家重点实验室,浙江杭州310027

出  处:《高校化学工程学报》2012年第2期285-289,共5页Journal of Chemical Engineering of Chinese Universities

摘  要:在1-乙基-3-(3-二甲氨丙基)碳化二亚胺盐酸盐(EDC)和N-羟基琥珀酰亚胺(NHS)催化作用下,采用水溶性的壳寡糖(CSO)与丙烯酸(AA)发生N-酰化反应,制备出一种新型水溶性可降解水凝胶交联剂——丙烯酸接枝壳寡糖(CSO-g-AA)。用CSO-g-AA与丙烯酰胺单体共聚制备了聚丙烯酰胺水凝胶。该水凝胶可在蜗牛酶作用下降解为水溶性直链聚丙烯酰胺。采用1H-NMR、红外吸收光谱法对CSO-g-AA结构进行表征,用溴酸钾-溴化钾滴定法定量分析了CSO-g-AA中不饱和双键的含量。结果表明:该交联剂中不饱和双键的接枝率约为4%,在适当的温度、pH值和酶浓度下水凝胶经72 h完全降解。A new water soluble and biodegradable crosslinker of chitosan oligosaccharide-graft-acrylic acid (CSO-g-AA) was synthesized through the acrylyl reaction of amino groups in the chitosan oligosaccharide (CSO) chains with acrylic acid (AA) catalyzed by l-ethyl-3-(3-dimethylaminopropyi)-carbodiimidehydro-chioride (EDC) and N-hydroxysuccinimide (NHS). Polyacrylamide (PAM) hydrogels were prepared by copolymerization of acrylamide and CSO-g-AA. CSO-g-AA was structurally characterized by Fourier transform infrared spectroscopy (FT-IR) and H-1 nuclear magnetic resonance (1H-NMR) spectroscopy. The content of unsaturated double bond in CSO-g-AA was quantitatively analysed by titration analysis using potassium bromate (KBrO) and potassium bromide (KBr). The results show that the grafting ratio of unsaturated double bond in CSO-g-AA is about 4%. At a proper temperature, pH value and concentration of enzyme, the PAM hydrogels can be degraded to water soluble polyacrylamide chains in 72 h under the catalysis ofsnailase.

关 键 词:壳寡糖 丙烯酸化 接枝反应 可降解交联剂 水凝胶 

分 类 号:TQ326.4[化学工程—合成树脂塑料工业]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象