Poly-N-isopropylacrylamide Nanogels and Microgels at Fluid Interfaces

纳米凝胶 材料科学 聚(N-异丙基丙烯酰胺) 纳米技术 聚合物 化学工程 防水剂 化学 复合材料 共聚物 药物输送 有机化学 工程类
作者
Marcel Rey,Miguel Ángel Fernández-Rodríguez,Matthias Karg,Lucio Isa,Nicolas Vogel
出处
期刊:Accounts of Chemical Research [American Chemical Society]
卷期号:53 (2): 414-424 被引量:107
标识
DOI:10.1021/acs.accounts.9b00528
摘要

The confinement of colloidal particles at liquid interfaces offers many opportunities for materials design. Adsorption is driven by a reduction of the total free energy as the contact area between the two liquids is partially replaced by the particle. From an application point of view, particle-stabilized interfaces form emulsions and foams with superior stability. Liquid interfaces also effectively confine colloidal particles in two dimensions and therefore provide ideal model systems to fundamentally study particle interactions, dynamics, and self-assembly. With progress in the synthesis of nanomaterials, more and more complex and functional particles are available for such studies. In this Account, we focus on poly(N-isopropylacrylamide) nanogels and microgels. These are cross-linked polymeric particles that swell and soften by uptaking large amounts of water. The incorporated water can be partially expelled, causing a volume phase transition into a collapsed state when the temperature is increased above approximately 32 °C. Soft microgels adsorbed to liquid interfaces significantly deform under the influence of interfacial tension and assume cross sections exceeding their bulk dimensions. In particular, a pronounced corona forms around the microgel core, consisting of dangling chains at the microgel periphery. These polymer chains expand at the interface and strongly affect the interparticle interactions. The particle deformability therefore leads to a significantly more complex interfacial phase behavior that provides a rich playground to explore structure formation processes. We first discuss the characteristic "fried-egg" or core-corona morphology of individual microgels adsorbed to a liquid interface and comment on the dependence of this interfacial morphology on their physicochemical properties. We introduce different theoretical models to describe their interfacial morphology. In a second part, we introduce how ensembles of microgels interact and self-assemble at liquid interfaces. The core-corona morphology and the possibility to force these elements into overlap upon compression results in a complex phase behavior with a phase transition between microgels with extended and collapsed coronae. We discuss the influence of the internal particle architecture, also including core-shell microgels with rigid cores, on the phase behavior. Finally, we present new routes for the realization of more complex structures, resulting from multiple deposition protocols and from engineering the interaction potential of the individual particles.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Cecily关注了科研通微信公众号
1秒前
1秒前
Han发布了新的文献求助10
1秒前
1秒前
2秒前
飞飞完成签到,获得积分10
3秒前
3秒前
鬼鬼鼠鼠偷番薯完成签到,获得积分10
3秒前
4秒前
lagom完成签到,获得积分10
4秒前
隐形曼青应助fyl采纳,获得10
5秒前
飞飞发布了新的文献求助10
5秒前
円桑发布了新的文献求助10
5秒前
研友_LJGXgn完成签到,获得积分10
6秒前
mxx完成签到,获得积分20
6秒前
7秒前
7秒前
帆帆牛完成签到,获得积分10
7秒前
Akim应助djbj2022采纳,获得10
8秒前
9秒前
9秒前
SciGPT应助ljs采纳,获得10
9秒前
9秒前
晾猫人完成签到,获得积分10
10秒前
慕青应助汪洋采纳,获得10
10秒前
去2完成签到 ,获得积分10
10秒前
10秒前
11秒前
cherry完成签到,获得积分10
11秒前
11秒前
潇洒寒烟发布了新的文献求助10
12秒前
虚幻尔阳发布了新的文献求助10
12秒前
hongfei完成签到,获得积分10
12秒前
bb发布了新的文献求助10
13秒前
周老八发布了新的文献求助10
14秒前
14秒前
叶泽完成签到,获得积分10
14秒前
lx发布了新的文献求助10
15秒前
栗子发布了新的文献求助10
15秒前
15秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969383
求助须知:如何正确求助?哪些是违规求助? 3514211
关于积分的说明 11172730
捐赠科研通 3249476
什么是DOI,文献DOI怎么找? 1794909
邀请新用户注册赠送积分活动 875441
科研通“疑难数据库(出版商)”最低求助积分说明 804827