光交联交替层状自组装(LBL)抗菌膜的制备及其性能研究  

Preparation and Characterization of Photo-crosslinked Layer-by-Layer(LBL)Self-assembled Antibacterial Films

作　　者：王学斌 薛源 周耀武 陈声毅 包春燕[1] 朱麟勇[1] Xue-binWang;Yuan Xue;Yao-wu Zhou;Sheng-yi Chen;Chun-yan Bao;Lin-yong Zhu(Shanghai Key Laboratory of Functional Materials Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237)

机构地区：[1]上海市功能性材料化学重点实验室华东理工大学化学与分子工程学院,上海200237

出　　处：《高分子学报》2022年第2期133-144,共12页Acta Polymerica Sinica

基　　金：上海市自然科学基金项目(基金号21ZR1415500)资助项目.

摘　　要：针对静电超分子作用的交替层状自组装(LBL)膜稳定性差、易分解和难以实现应用的问题,设计合成了一种光交联型抗菌LBL多层膜.该LBL多层膜由修饰有光敏邻硝基苄醇分子的透明质酸(HANB)与季铵化的壳聚糖(ACS)通过静电作用在基片上交替沉积而成.光照后,HANB上的邻硝基苄醇分子产生活性醛基,与邻近壳聚糖上的氨基发生亚胺偶联反应,实现了LBL多层膜的光交联.实验证明交联后的LBL膜具有很好的稳定性,能在不同pH值盐溶液中长期保持膜的完整性.壳聚糖的抗菌特性赋予LBL膜良好的抗菌性能,亲水性生物大分子骨架的选取赋予LBL膜良好的细胞相容性.与其他化学交联方法相比,邻硝基苄醇光交联策略无需任何引发剂或添加剂的引入,具有更好的生物相容性,为医疗植入物表面抗菌涂层的构建提供新方法.Bacteria are one of the oldest life forms on the earth.They have strong adaptability to various environments and can be seen almost everywhere on the earth.Bacteria will adhere to different surfaces and then reproduce to form dense aggregates or biofilms with a thickness of several microns to tens of centimeters,which will seriously affect the properties of materials,especially for medical devices.Bacterial adhesion and biofilm formation on these devices are an important reason for the failure of medical implantation and the formation of large-area medical infection.Therefore,researchers are focusing on developing antibacterial surface coatings to eliminate or prevent the initial adhesion of bacteria and biofilm formation on the surface of materials.Alternating layered self-assembly(LBL)film,as the most popular coating technology,is applicable to the surface of various materials.Due to its advantages of simple operation,high controllability and easy functionalization,LBL film is widely used in separation technology,sensor,controlled drug release,surface modification of biomaterials and so on.However,its inherent shortcomings,such as poor stability,easy decomposition,etc.,greatly limit their applications.To solve the above problems,a kind of photo crosslinking antibacterial LBL membrane was designed and prepared by alternating deposition of photosensitive o-nitrobenzyl alcohol modified hyaluronic acid(HANB)and quaternized chitosan(ACS)on the glass substrate through electrostatic interaction.The photoligation reaction of o-nitrobenzyl alcohol to amine of chitosan enables the crosslinking of the assembled polyelectrolyte membrane,which stabilizes and maintains the integrity of the membrane for a long time in salt solutions with different pH values.The antibacterial property of chitosan endows LBL membrane with good antibacterial property and strong electrostatic supramolecular interactions with HANB.Cytotoxicity analysis confirms the cytocompatibility of the LBL membranes.Antibacterial experiments show that the non

关 键 词：交替层状自组装膜 抗菌涂层 光交联 细胞相容性 

分 类 号：G64[文化科学—高等教育学]