不同取代羧甲基壳聚糖的制备及其对医用透析纸性能的影响
Preparation of carbonxymethyl chitosan and its effects on medical dialysis paper
付柄清 1左金华 1章飞洋 1熊方涛 1杨俊 1赵会芳 1沙力争 1陈建斌2
作者信息
- 1. 浙江科技大学 环境与资源学院,杭州 310023
- 2. 华邦古楼新材料有限公司,衢州 324499
- 折叠
摘要
为了改善壳聚糖的水溶性,拓展其在造纸领域的应用,本文以壳聚糖(CS)为主要原料,采用氯乙酸作为醚化剂,在碱性条件下进行羧甲基化反应,通过控制反应温度、时间和pH值来得到不同取代位点的羧甲基壳聚糖(CMCS),采用红外光谱和核磁氢谱对CMCS产物进行结构表征和分析,并测定了其取代度及在水中的溶解度;最后将制备好的CMCS作为添加剂用于透析纸的制备,研究其用量对透析纸物理强度、透气度及抗菌性能的影响.结果表明:添加不同取代位点的羧甲基壳聚糖对透析纸的强度均有所改善,相对于氨基位取代的 CMCS(N-CMCS)和氨基及羟基位同时取代的 CMCS(N,O-CMCS),添加羟基位取代的 CMCS(O-CMCS)对透析纸的增强效果最为显著.当O-CMCS添加量为 2.5wt％时,纸张的干、湿抗张强度、耐破指数分别为 61.6 N·m·g-1、8.61 N·m·g-1 和 6.19 kPa·m2·g-1,比未添加时分别提高了 18.8％、113％和 91.0％;纸张的透气度为 7.98μm·(Pa·s)-1,满足透析纸的高透气性要求.此外,添加O-CMCS、N-CMCS和 N,O-CMCS的纸张均具有较好的抗菌性,对大肠杆菌的抑菌率分别达到86.7％、83.8％和83.6％.
Abstract
In order to improve the water solubility of chitosan(CS)and extend its application in the field of paper-making,CS was used as the main raw material and chloroacetic acid was used as the etherification agent to prepare carboxymethyl chitosan(CMCS)under alkaline conditions.CMCS with different substitution sites were obtained by controlling the reaction temperature,time and pH value.Then,the structures of CMCS were analyzed by using in-frared spectroscopy(FTIR)and nuclear magnetic resonance spectroscopy(1H-NMR),and their degree of substitu-tion and water solubility were measured.Finally,the prepared CMCS was used as additives to prepare dialysis paper,and the effects of CMCS dosage on the physical strength,permeability and antibacterial performance of dialysis paper were investigated.The results showed that the addition of CMCS with different substitution sites all improved the physical strength of dialysis paper,however,compared with the amino substituted CMCS(N-CMCS)and the amino and hydroxyl substituted CMCS(N,O-CMCS),the addition of the hydroxyl substituted CMCS(O-CMCS)had the most significant effects.When 2.5wt％O-CMCS was added to the papermaking pulp,the dry tensile,wet tensile and burst index of the paper were 61.6 N·m·g-1,8.61 N·m·g-1 and 6.19 kPa·m2·g-1,which increased by 18.8％,113％,and 91.0％,respectively.The air permeability of paper reached 7.98 μm·(Pa·s)-1,meeting the require-ments of air permeability of the dialysis paper.In addition,the paper containing O-CMCS,N-CMCS and N,O-CMCS all showed good antibacterial activity,and had antibacterial rates of 86.7％,83.8％,and 83.6％against Escherichia coli,respectively.
关键词
羧甲基化壳聚糖/取代位点/透析纸/物理强度/抗菌性能Key words
carboxymethyl chitosan/substitution sites/dialysis paper/physical strength/antibacterial perform-ance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据