表面活性剂-纳米颗粒相互作用与智能体系的构建（IV）非离子表面活性剂-纳米颗粒相互作用——氢键作用构建温度-响应性Pickering乳状液

doi:10.3969/j.issn.1001-1803.2019.10.002

摘要/Abstract

摘要：

在水介质中,多数无机商品纳米颗粒的表面除了带有电荷,一般还分布有大量的羟基。这些表面羟基一方面使颗粒表面具有强亲水性,另一方面提供了丰富的位点,使其能够与聚氧乙烯（EO）基团形成氢键,故而含有EO基团的非离子表面活性剂能够通过氢键作用吸附于这些固体颗粒表面,形成以EO链朝向颗粒表面、烷基链朝向水的单分子层,对颗粒产生原位疏水化作用。由于氢键具有温度效应：在低温下易于建立和稳定,在高温下减弱或断裂,因此利用氢键作用可以获得以温度为触发机制的开关性表面活性颗粒。本讲座将介绍如何利用非离子表面活性剂和普通纳米颗粒例如纳米SiO₂组合,通过氢键作用构建温度-响应性Pickering乳状液。

关键词: 氢键作用, 纳米SiO₂, 非离子表面活性剂, 温度响应, Pickering乳状液

Abstract:

In aqueous media, the surfaces of most commercial inorganic nanoparticles are not only charged but also distributed with a large amount of hydroxyl groups. On the one hand, these hydroxyl groups make the particle surfaces strongly hydrophilic, and on the other hand, they provide abundant sites, enabling the formation of hydrogen bonding with polyoxyethylene（EO）group. Therefore, the nonionic surfactants containing EO group can adsorb at the particle/water interface with EO chains on particle surface and the alkyl chains oriented toward water, forming a hydrophobic monolayer and producing hydrophobization in situ to the particle surfaces. Since hydrogen bonding is temperature sensitive（i.e. it is easy to be established and stable at low temperature, but is weakened and even broken at high temperature）, it is possible to obtain switchable surface-active inorganic nanoparticles triggered by temperature by means of hydrogen bonding. Herein, it will be discussed that how to construct temperature-responsive Pickering emulsions by using nonionic surfactants in combination with common inorganic nanoparticles such as silica nanoparticles via hydrogen bonding interaction.

Key words: hydrogen bonding, silica nanoparticle, nonionic surfactant, temperature-responsive, Pickering emulsion

中图分类号:

TQ423

张婉晴,蒋建中,崔正刚. 表面活性剂-纳米颗粒相互作用与智能体系的构建（IV）非离子表面活性剂-纳米颗粒相互作用——氢键作用构建温度-响应性Pickering乳状液[J]. 日用化学工业, 2019, 49(10): 633-642.

ZHANG Wan-qing,JIANG Jian-zhong,CUI Zheng-gang. Interactions between surfactants and nanoparticles and theconstruction of smart systems（IV）Interactions between nanoparticles and nonionic surfactantsConstruction of temperature-responsive Pickering emulsionsvia hydrogen bonding[J]. China Surfactant Detergent & Cosmetics, 2019, 49(10): 633-642.

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θ/℃	V（分出水相）/mL	m（水相中颗粒）/g	C_p/%	吸附百分数/%
25	4.998	0.015	0.308	37.4±1.4
25	5.002	0.016	0.318
45	5.012	0.023	0.453	11.0±2.2
45	5.005	0.022	0.438