酪素基rGO复合乳液的制备及其阻燃性能  

Preparation and flame retardant properties of casein-based rGO composite emulsion

作　　者：安文 马建中 徐群娜 AN Wen;MA Jianzhong;XU Qunna(College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;National Demonstration Center for Experimental Light Chemistry Engineering Education,Xi'an 710021,Shaanxi,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]轻化工程国家级实验教学示范中心,陕西西安710021

出　　处：《精细化工》2021年第5期1045-1052,共8页Fine Chemicals

基　　金：国家自然科学基金重点项目(21838007);国家自然科学基金面上项目(22078185)。

摘　　要：为制备具有增强阻燃效果的皮革涂饰材料,首先以天然石墨为原料,采用Hummers法制备氧化石墨烯(GO),并采用NaBH_(4)对其进行还原得到还原氧化石墨烯(rGO)。通过FTIR,XRD和TEM等对其进行表征。结果表明,成功制备了rGO纳米材料。随后,采用物理共混法将rGO引入天然蛋白质酪素体系,制备酪素基rGO复合乳液并将其应用于皮革涂饰,对涂饰后革样的阻燃性能、力学性能和耐干湿擦性能进行测试。结果表明,当rGO的含量为酪素体系溶质质量的0.5%时,与未含r GO的酪素体系相比,涂饰后革样的燃烧速率下降47.2%,极限氧指数(LOI)由24.2%增加至26.3%,热释放速率(HRR)下降53.1%,总热释放速率(THR)也有所降低。r GO的引入对涂饰后革样的力学性能和耐干湿擦性能影响不大。In order to prepare leather finishing materials with enhanced flame retardant effect, graphene oxide(GO) was prepared from natural graphite by modified Hummers method, and reduced by NaBH_(4) to obtain reduced graphene oxide(r GO). The as-obtained graphene was characterized by FTIR, XRD and TEM. The results showed that rGO was successfully prepared. Then, physical blending method was used to introduce rGO into natural protein casein system to prepare casein-based rGO composite emulsion. The composite emulsion was used as leather finish. The flame-retardant properties, mechanical property, as well as dry and wet rubbing resistance of the finished leather samples were tested. Compared with those of the leather sample finished by the casein system without r GO, the combustion rate of the leather samples finished by the casein system(rGO content being 0.5% of the solute mass of the casein system) decreased by 47.2%, the limit oxygen index(LOI) increased from 24.2% to 26.3%, the heat release rate(HRR) decreased by 53.1%, and the total heat release rate(THR) also decreased. At the same time, the introduction of rGO had little effect on the mechanical properties, as well as dry and wet rubbing resistance of finished leather samples.

关 键 词：酪素 rGO 阻燃性 皮革涂饰 橡塑助剂 

分 类 号：TS529.5[轻工技术与工程—皮革化学与工程]