文献类型：期刊文献

英文题名：Heterogeneously Modified Cellulose Nanocrystals-Stabilized Pickering Emulsion: Preparation and Their Template Application for the Creation of PS Microspheres with Amino-Rich Surfaces

作者：Du, Wenbo[1,2] Guo, Juan[3,4] Li, Huaming[1,2] Gao, Yong[1,2]

第一作者：Du, Wenbo

通信作者：Gao, Y[1];Gao, Y[2];Guo, J[3];Guo, J[4]|[a0005c616682e38d4137f]郭娟;

机构：[1]Xiangtan Univ, Coll Chem, Xiangtan 411105, Hunan, Peoples R China;[2]Coll Hunan Prov, Key Lab Adv Funct Polymer Mat, Key Lab Polymer Mat & Applicat Technol Hunan Prov, Xiangtan 411105, Hunan, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[4]Chinese Acad Forestry, Res Inst Wood Ind, Dept Wood Anat & Utilizat, Beijing 100091, Peoples R China

年份：2017

卷号：5

期号：9

起止页码：7514-7523

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20173704143374);Scopus(收录号：2-s2.0-85028842691);WOS:【SCI-EXPANDED(收录号:WOS:000410006200010)】；

基金：The authors appreciated the financial supports from the National Natural Science Foundation of China (21574112, 21174118), Hunan Provincial Natural Science Foundation of China (2017JJ2243), Open Project of Hunan Provincial University Innovation Platform (15K123), and a project of Research Institute for Forestry New Technology, Chinese Academy of Forestry (CAFINT2014K03), the National Nonprofit Institute Research Grant of CAFINT, China.

语种：英文

外文关键词：ellulose nanocrystals (CNCs); Pickering emulsion; Reversible covalent bond; Template

摘要：A kind of manipulative oil in water Pickering emulsion stabilized by heterogeneously modified cellulose nanocrystals (CNCs) and its application as a template for the creation of functional polystyrene microspheres were presented in this study. First, 18-carbon alkyl long chains were selectively introduced at the reducing ends of CNCs through a two-step chemical process including the hydrazone reaction and the amidation reaction. The as-obtained heterogeneously modified CNCs (CNC-C-18) were then used as emulsifiers for the formation of oil in water Pickering emulsions. Compared with the pristine CNCs used in this study, CNC-C-18 exhibited a high emulsifying performance. Highly stable oil in water Pickering emulsions could be formed at a low content of CNC-C-18 nanoparticles. Because of the pH-responsive stability of the C=N bond linkages between 18-carbon alkyl chains and CNCs, the introduced 18-carbon alkyl chains could be cleaved completely at a suitable acid condition, and this endowed the formed Pickering emulsions with a pH-triggered de-emulsification character. Upon the replacement of n-hexane with a styrene/divinyl benezene mixed oil, cross-linked PS microspheres with amino-rich surfaces were created by the Pickering emulsion directed-radical copolymerization reaction, followed by acid treatment. The current work revealed CNCs could be used as a promising green and widely available resource for the fabrication of stimuli-responsive particle emulsifiers.