水滴模板技术设计聚合物薄膜三维有序多孔结构

IF 5.2 Q1 POLYMER SCIENCE

ACS Macro Letters Pub Date : 2025-01-24 DOI:10.1021/acsmacrolett.4c00753

Wanxin Peng, Sen Lin, Feng Yang, Ya Cao, Ming Xiang, Tong Wu

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引用次数: 0

摘要

我们开发了一种独特的水滴模板法来制备具有三维有序多孔结构的聚合物薄膜。该技术是基于聚合物/溶剂/H2O三元体系，关键是选择挥发性和疏水的溶剂，与H2O略有混相。随着溶剂的快速蒸发，水滴从铸造溶液中分离出来，从空气中凝结，分别在薄膜内部和表面充当孔模板。根据这一规律，以NC/醋酸甲酯(MA)/水体系为原料制备了硝酸纤维素（NC）膜，其中水在MA中的溶解度为8.1 wt %。通过调节溶液浓度（密度）在3% ~ 9%的NC范围内，可灵活控制溶液中分离水滴（孔隙）的分布由下沉到漂浮。另一方面，NC膜表面均匀分布着大量有序的蜂窝孔，这些孔是由凝结的水滴形成的。这种水滴模板技术可以广泛应用于各种聚合物薄膜，为设计具有理想多孔结构和多种功能的聚合物薄膜提供了有效途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Water Droplet Templating Technique to Design Three-Dimensionally Ordered Porous Structures of Polymer Film

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Water Droplet Templating Technique to Design Three-Dimensionally Ordered Porous Structures of Polymer Film

We developed a unique water droplet templating method to fabricate polymer films with three-dimensionally ordered porous structures. This technique is based on a polymer/solvent/H₂O ternary system, and the key is to choose a volatile and hydrophobic solvent that is slightly miscible with H₂O. With the fast evaporation of the solvent, water droplets separate from the casting solution and condense from the air to act as pore templates inside the film and on the surface, respectively. According to this law, nitrocellulose (NC) films were produced from the NC/methyl acetate (MA)/H₂O system in which the solubility of H₂O in MA is 8.1 wt %. By modulating the solution concentration (density) from 3% to 9% NC, the distribution of separated water droplets (pores) in the solution can be flexibly controlled from sinking to floating. On the other hand, substantial ordered honeycomb pores, originated from condensed water droplets, distribute uniformly on the surface of NC films. This water droplet templating technique can be extensively applied in various polymer films, providing an effective pathway to designing polymer films with a desirable porous structure and diverse functionalities.

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来源期刊

ACS Macro Letters 化学-

CiteScore

10.40

自引率

3.40%

发文量

209

审稿时长

1 months

期刊介绍： ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science. With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.