基于Pickering乳液技术制备高强度和高透明的纤维素纳米纤维/聚苯乙烯复合材料  

Cellulose Nanofibers Reinforce Polystyrene Composites Based on Pickering Emulsion Technology

作　　者：贺莹莹 刘馨月 齐晓俊 管宇鹏 李帅 刘红霞[1] Yingying He;Xinyue Liu;Xiaojun Qi;Yupeng Guan;Shuai Li;Hongxia Liu(Guangxi State Key Laboratory of Nonferrous Metals and Special Materials Processing,College of Material Science&Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学材料科学与工程学院广西有色金属及特色材料加工国家重点实验室,广西桂林541004

出　　处：《高分子材料科学与工程》2021年第2期73-79,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21664006);广西自然科学基金资助项目(2016GXNSFAA380004)。

摘　　要：利用纤维素纳米纤(CNFs)稳定的油相中含有聚苯乙烯(PS)的O/W型Pickering乳液凝胶,经进一步真空过滤、溶剂洗涤和热压过程制备了CNFs增强的PS(CNFs/PS)复合材料。所得的C-CNFs/PS复合薄膜材料具有独特的多尺度的三维交联网络结构。其中,大部分PS以鹅卵石状镶嵌在微米级的三维交联网络结构中,而其则由初始的相互缠结交联的CNFs与少量PS形成的CNFs/PS复合片层构成。所得的复合材料具有良好的热稳定性、优异的透明性和力学性能。当CNFs的含量为48%时,其最佳拉伸强度为63 MPa,与纯PS相比,提高了约4.5倍,同时在600~800 nm的波长范围内保持约87%的优异透光率。The oil-in-water Pickering emulsion gel stablized by cellulose nanofibrils(CNFs)was combined with vacuum filtration,solvent washing and hot pressing process to prepare CNFs reinforced polystyrene(PS)matrix composites(C-CNFs/PS).The obtained C-CNFs/PS composites have a uniquely multiscale three-dimensional crosslinked network structure.In the composites,most PS microspheres as pebble-shaped structure are inbeded in micrometer-sized 3D cross-linking networks,which consists of composite layers built by a few PS and nanometer-sized CNFs networks.The composites are endowed with better thermal stability,excellent transparency and mechanical properties.When the content of CNFs is 48%,the optimal tensile strength reaches up to 63 MPa,which marks an improvement of approximately 4.5 times compared with that of a neat PS,and an excellent light transmittance of about 87%in the wavelength range of 600~800 nm is maintained.

关 键 词：纤维素纳米纤 Pickering乳液 复合材料 透明性 聚苯乙烯 

分 类 号：TB332[一般工业技术—材料科学与工程]