期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 9, 页码 7514-7523出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00375
关键词
ellulose nanocrystals (CNCs); Pickering emulsion; Reversible covalent bond; Template
资金
- 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]
- Research Institute for Forestry New Technology, Chinese Academy of Forestry [CAFINT2014K03]
- National Nonprofit Institute Research Grant of CAFINT, China
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据