共沉淀法制备Mg2Al-LDH及其鞣制性能研究  

Study on preparation of Mg2Al-LDH by co-precipitation and its tanning properties

作　　者：杨晓燕 马建中 石佳博 杨娜 YANG Xiao-yan;MA Jian-zhong;SHI Jia-bo;YANG Na(College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education,Key Laboratory of Auxiliary Chemistry&Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science&Technology,Xi′an 710021,China)

机构地区：[1]陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心教育部轻化工助剂化学与技术重点实验室

出　　处：《陕西科技大学学报》2020年第1期12-17,24,共7页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(21838007);陕西科技大学科研创新团队计划项目(TD12-03)

摘　　要：采用共沉淀法,通过改变溶液pH值制备结晶度高、尺寸大小约为60 nm的水滑石(Mg 2Al-LDH),并将其应用于鞣制山羊皮.通过改变鞣制工艺中的Mg 2Al-LDH用量、渗透及结合pH值,以收缩温度为考察指标,优化出Mg 2Al-LDH用量为3%、鞣制时间为2 h、渗透pH值为3.0、结合pH值为4.0的最佳工艺条件.XRD及SEM结果显示,Mg 2Al-LDH可以有效分散并渗透在皮胶原纤维内部,在分散皮胶原纤维的同时,可作用到皮胶原纤维束表面及纤维之间.Mg 2Al-Layered Double Hydroixdes(Mg 2Al-LDH)with high crystallinity and size of around 60 nm was prepared through changing the pH value of solution according to co-precipitation method.The tanning process based on the as-prepared LDH were further studied by adjusting the dosages of Mg 2Al-LDH,initial and finial pH values in terms of the shrinkage temperature of the resulting crust leathers.The optimized tanning system was using 3%LDH for 2 h at initial pH3.0 and final pH4.0.XRD and SEM results showed that Mg 2Al-LDH nanosheets can be well-dispersed and penetrate into collagen fibers dispersing the collagen fibers and bound onto of between the collagen fibrils.

关 键 词：水滑石 鞣制工艺 皮胶原纤维 微观结构 

分 类 号：TQ943[化学工程]