两亲性Janus粒子在蜂窝状多孔聚合物膜上的自组装性能

doi:10.7503/cjcu20160711

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (4): 678.doi: 10.7503/cjcu20160711

两亲性Janus粒子在蜂窝状多孔聚合物膜上的自组装性能

杨平辉^1,², 朱嘉峰^1,², 孙巍^1,²(), 周婉蓉^1,²

1. 宁波大学材料化学与工程学院材料科学与工程系,2. 宁波市特种高分子材料制备与应用技术重点实验室, 宁波 315211

收稿日期:2016-10-11 出版日期:2017-04-10 发布日期:2017-03-22
作者简介:联系人简介: 孙巍, 男, 博士, 副教授, 主要从事聚合物表界面技术研究. E-mail: sunwei@nbu.edu.cn
基金资助:
国家自然科学基金(批准号: 21104036)、宁波市自然科学基金(批准号: 2015A610057)、浙江省重点科技创新团队自设项目(批准号: 211R50001-04)和宁波大学王宽诚幸福基金资助

Self-assembly Behavior of Amphiphilic Janus Particles in the Acting Process of Breath Figure Method^†

YANG Pinghui^1,², ZHU Jiafeng^1,², SUN Wei^1,^2,^*(), ZHOU Wanrong^1,²

1. Department of Materials Science and Engineering, School of Materials Science and Chemical Engineering,2. Key Laboratory of Specialty Polymers, School of Materials Science and Chemical Engineering,Ningbo University, Ningbo 315211, China

Received:2016-10-11 Online:2017-04-10 Published:2017-03-22
Contact: SUN Wei E-mail:sunwei@nbu.edu.cn
Supported by:
† Supported by the National Natural Science Foundation of China(No.21104036), the Natural Science Foundation of Ningbo City, China(No.2015A610057), the Program for Zhejiang Leading S&T Innovation Team, China(No.211R50001-04) and the K. C. Wong Magna Fund in Ningbo University, China.

摘要/Abstract

摘要：

采用具有两亲性的两面体(Janus)粒子实现稳定的粒子界面组装与水滴模板法自组装过程相结合的方法获得了粒子在蜂窝状多孔聚合物薄膜内壁的高效定向修饰. 通过与均质粒子组装形貌的对比, 证明了Janus粒子因其特殊的界面自组装活性, 可以获得高粒子加量条件下的规则多孔结构, 解决了使用均质粒子时存在的结构有序性和粒子修饰密度之间的矛盾. 而在较低粒子加量的条件下, Janus粒子也展示出与均质粒子极为不同的组装形貌. 这一方法的建立, 为新型表面功能化材料的制备提供了一个新的思路.

关键词: Janus粒子, 水滴模板法, 自组装, 功能化蜂窝状多孔膜

Abstract:

Breath figure(BF) method is a dynamic templating method for surface patterning of polymeric materials. The BF process has been extensively studied as a novel methodology to achieve surface patterning via self-assembly. During the evaporation of the solvent, functional buliding blocks added into the casting solution such as nanoparticles, block copolymers and other components containing hydrophilic parts could be able to spontaneously migrate onto the water/oil interfaces formed between templating water droplets and casting solution during the BF process. As a result, functionalization and modification of the obtained patterned surfaces on selective areas could be achieved at the time when matrices of patterned surfaces are formed. By employing the particles in BF method, the porous film with pore arrays selectively decorated with particles can be fabricated. Based on the combination of interfacial self-assembly of particles and self-assembly process of BF, amphiphilic Janus particles were employed in the breath figures method. Amphiphilic Janus silica particles were prepared by selective chemical treatment on the particle “colloidosomes”. Janus particles enriching the patterned pores present unique assembling characteristics which are much different from previously reported cases with homogeneous particles. The experimental results indicate that Janus particles show optimized assembling morphology when they are involved in the interfacial self-assembly process of BF. By employing Janus particles, a trade-off of the ordering of the honeycomb-structured pore arrays and the density of decorated particles was also achieved. With lower concentration of particles being used, Janus particles show quite different assembling behavior from their homogeneous counterparts. It opens an attractive route to produce functional hierarchically patterned materials by, for example, loading the biological Janus particles for single-cell cultures or catalytic Janus particles for micro-chemical reactors.

Key words: Janus particle, Breath figure method, Self-assembly, Functional honeycomb-structured porous film

中图分类号:

O631.1

TrendMD:

杨平辉, 朱嘉峰, 孙巍, 周婉蓉. 两亲性Janus粒子在蜂窝状多孔聚合物膜上的自组装性能. 高等学校化学学报, 2017, 38(4): 678.

YANG Pinghui, ZHU Jiafeng, SUN Wei, ZHOU Wanrong. Self-assembly Behavior of Amphiphilic Janus Particles in the Acting Process of Breath Figure Method^†. Chem. J. Chinese Universities, 2017, 38(4): 678.

图/表 6

Fig.1 SEM images of colloidosomes made from silica particles[600 nm(A, B) and 1000 nm(C, D )] stabilized wax-in-water emulsion

Fig.2 SEM images of Janus particles selective area labeled with Au nanoparticles (A) 600 nm; (B) 1000 nm.

Fig.3 SEM images of porous films fabricated from solutions prepared by adding Janus particles(A—D) and hydrophilic particles suspension(E—H) with concentration of 10 mg/mL into 1 mL PS chloroform solution with concentration of 15 g/LThe amounts of Janus particles(or hydrophilic SiO2 particles) suspension are 10 μL(A, E), 15 μL(B, F), 20 μL(C, G), 25 μL(D, H), respectively.

Fig.4 SEM images of porous films fabricated from solutions prepared by adding Janus particles(A, B) and hydrophilic particles alcoholic suspension(C, D) with the concentration of 10 mg/mL into 1 mL PS chloroform solution with concentration of 15 mg/mLThe amount of particles alcoholic suspension was 45 μL.

Fig.5 Cross-sectional SEM images of porous films fabricated from solutions prepared by adding Janus particles with the concentration of 10 mg/mL into 1 mL PS chloroform solution with concentration of 15 mg/mLThe amount of particles suspension is 60 μL.

Fig.6 Cross-sectional SEM images of porous films fabricated from solutions prepared by pure PS chloroform(A) or adding Janus particles(B—D ) with the concentration of 10 mg/mL into 1 mL PS chloroform solution with concentration of 15 mg/mLThe amount of particles alcoholic suspension is 15 μL(B ), 30 μL(C ) and 45 μL(D).

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两亲性Janus粒子在蜂窝状多孔聚合物膜上的自组装性能

Self-assembly Behavior of Amphiphilic Janus Particles in the Acting Process of Breath Figure Method^†

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两亲性Janus粒子在蜂窝状多孔聚合物膜上的自组装性能

Self-assembly Behavior of Amphiphilic Janus Particles in the Acting Process of Breath Figure Method†

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Self-assembly Behavior of Amphiphilic Janus Particles in the Acting Process of Breath Figure Method^†