金红石型纳米二氧化钛/聚二甲基硅氧烷复合改性制备多功能胶原海绵  

Preparation of Multifunctional Collagen Sponge by Composite Modification of Rutile-Type Titanium Dioxide/Polydimethylsiloxane

作　　者：张敏[1] 郭晨晨 王瑜 张云龙 丁翠翠 黄六莲[1] 陈礼辉[1] Min Zhang;Chenchen Guo;Yu Wang;Yunlong Zhang;Cuicui Ding;Liulian Huang;Lihui Chen(College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China;College of Ecological Environment and Urban Construction,Fujian University of Technology,Fuzhou 350108,China)

机构地区：[1]福建农林大学材料工程学院,福建福州350108 [2]福建工程学院生态环境与城市建设学院,福建福州350108

出　　处：《高分子材料科学与工程》2023年第2期26-35,共10页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(22178056,22078060);福建省自然科学基金资助项目(2020J01555,2020J01881)。

摘　　要：胶原(COL)是一种来自于动物生物质的天然高分子材料,具有来源丰富、易加工、易修饰、可降解等优势。在胶原材料中,基于冻干处理而得的海绵具有天然多孔性,不仅为油相储存提供了充足的空间,还为功能微纳组分的固载提供了骨架网络。文中以胶原海绵为基底、聚二甲基硅氧烷(PDMS)为疏水改性剂、金红石型二氧化钛纳米颗粒(TiO_(2))为光催化剂,制备出集疏水性、光催化效应及光响应抗菌性于一体的多功能复合胶原海绵TiO_(2)/PDMS-COL。使用场发射扫描电镜观察TiO_(2)/PDMS-COL的形貌,利用红外光谱、X射线光电子能谱、X射线衍射和热重分析对TiO_(2)/PDMS-COL的结构进行了表征。结果证实,TiO_(2),PDMS与COL之间产生了复合作用。复合海绵对CHCl_(3)的吸附容量可达134 g/g;循环使用20次后接触角下降较少。复合海绵对乳液也展现出良好的分离能力。模拟太阳光照射下,80min内复合海绵对罗丹明B的降解率达88%,且3次光照循环使用后其催化降解性能未发生明显下降。此外,光照下TiO_(2)产生的活性氧使复合海绵具备优异的光响应抗菌性,其对大肠杆菌与金黄色葡萄球菌的抑菌率达90%以上。Collagen(COL)is a kind of natural polymer from animal biomass,which is rich in source,easy in processing and modification and degradable.Among collagen materials,sponges based on lyophilization have natural porosity,which not only provide sufficient space for oil phase storage,but also provide skeleton network for the fixation of functional micro-nano components.Using collagen sponge as framework,polydimethylsiloxane(PDMS)as hydrophobic modifier,and rutile-type titanium dioxide nanoparticles(TiO_(2))as photocatalyst,a multi-functional composite collagen sponge TiO_(2)/PDMS-COL integrating of hydrophobicity,photocatalytic and sunlight-responsive antibacterial activity was fabricated.The morphology of TiO_(2)/PDMS-COL was observed by FE-SEM,and the structure of TiO_(2)/PDMS-COL was characterized by FT-IR,XPS,XRD and TG.The results confirm that TiO_(2) and PDMS are successfully compounded with COL.The adsorption capacity of the composite sponge toward CHCl_(3) is as high as 134 g/g.The contact angle is not decreased obviously after 20 cycles.The compound sponge shows a good separation ability for emulsion.Under the irradiation of sunlight,the degradation rate toward RhB reaches 88%within 80 min,and it is not decreased significantly after three cycles.Reactive oxygen species produced by TiO_(2) under sunlight endow the composite sponge with excellent sunlight-responsive antibacterial activity,that is,the antibacterial rates toward E.coli and S.aureus are more than 90%,respectively.

关 键 词：胶原海绵 油水分离 光催化 抗菌性 

分 类 号：X703[环境科学与工程—环境工程]