Multilayer Poly(ionic liquid) Microcapsules Prepared by Sequential Phase Separation and Subsequent Photopolymerization in Ternary Emulsion Droplets
Multilayer Poly(ionic liquid) Microcapsules Prepared by Sequential Phase Separation and Subsequent Photopolymerization in Ternary Emulsion Droplets
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三元乳液液滴中连续相分离和后续光聚合制备多层聚（离子液体）微胶囊
DOI：
10.1021/acsapm.1c01315
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发表时间：
2022
影响因子：
5
通讯作者：
Tsutomu Ono
中科院分区：
文献类型：
--
作者：
Takaichi Watanabe;Yuka Yasuhara;Tsutomu Ono
我们报告了一个简单的微流控过程中，制备多层聚（离子液体）（PIL）微胶囊通过顺序的液-液相分离内三元乳液滴，然后由离子液体（IL）单体丰富的相的光聚合。首先在微流控装置中形成由疏水性IL单体、水和N，N-二甲基甲酰胺（DMF）组成的乳液液滴，然后由连续水相携带液滴。随后，DMF从液滴扩散到连续水相中，导致富IL相和富水相的连续内部相分离，产生包含交替的富IL相和富水相的多层乳液液滴。通过改变分散相的初始组成，将液滴层的数目控制在1至5个。此外，在形成更高级乳液液滴的条件下，相分离开始和各层形成之间的时间尺度变得更短。此外，多层乳液液滴中的富含IL的相容易通过光聚合固化，从而产生具有多层结构的PIL微胶囊。阴离子交换的PIL微胶囊实现其从疏水性到亲水性的转变，导致在PIL微胶囊具有不同的溶胀性能和PIL层的渗透性，通过各种溶剂。我们相信，在三元乳液液滴中观察到的顺序相分离系统可以为具有非平衡结构的PIL基胶体材料的设计铺平道路，从而扩展其在功能材料中的应用。
We report a simple microfluidic process to prepare multilayer poly(ionic liquid) (PIL) microcapsules via sequential liquid–liquid phase separation within ternary emulsion droplets followed by the photopolymerization of ionic liquid (IL) monomer-rich phases. Emulsion droplets, consisting of a hydrophobic IL monomer, water, andN,N-dimethylformamide (DMF), are first formed in a microfluidic device, and the droplets are then carried by a continuous aqueous phase. Subsequently, DMF diffuses from the droplets into the continuous aqueous phase, resulting in the sequential internal phase separation of the IL-rich and water-rich phases, generating multilayer emulsion droplets comprising alternating IL-rich and water-rich phases. The number of droplet layers was controlled from one to five by varying the initial composition of the dispersed phase. Furthermore, under the conditions where higher-order emulsion droplets were formed, the time scale between the onset of phase separation and the formation of each layer became shorter. Additionally, the IL-rich phases in the multilayer emulsion droplets were easily solidified via photopolymerization, resulting in PIL microcapsules with multilayer structures. Anion exchange of the obtained PIL microcapsules effectuated their transition from a hydrophobic to a hydrophilic nature, resulting in PIL microcapsules with diverse swelling properties and PIL layer permeability across various solvents. We believe that the sequential phase separation system observed in the ternary emulsion droplets can pave the way for the design of PIL-based colloidal materials with thermodynamically nonequilibrium structures, thereby extending their application in functional materials.
DOI：
10.1073/pnas.1716330115
发表时间：
2018-04-03
影响因子：
11.1
作者：
Moerman, Pepijn G.;Hohenberg, Pierre C.;Brujic, Jasna
通讯作者：
Brujic, Jasna
影响因子：
29.4
作者：
Kamio, Eiji;Yasui, Tomoki;Matsuyama, Hideto
通讯作者：
Matsuyama, Hideto
影响因子：
13.3
作者：
Feng, Kai;Gao, Ning;Li, Guangtao
通讯作者：
Li, Guangtao