Gas-Driven Porosity Control in Cellulose Acetate Membranes: Comparing Nitrogen and Carbon Dioxide for Micropore Formation.

IF 5.5 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biomacromolecules Pub Date : 2025-05-14 DOI:10.1021/acs.biomac.5c00257

Haram Ryu, Sang Wook Kang

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引用次数: 0

Abstract

Cellulose acetate (CA) is a widely used porous material in various industrial applications, and its processing methods have evolved. This study presents a novel approach to enhancing pore formation efficiency by substituting nitrogen (N₂) with carbon dioxide (CO₂), a gas with a higher quadrupole moment. This method was employed to fabricate lactic acid-plasticized CA membranes coated on polypropylene substrates, enabling control over pore size and porosity. Surface morphology was analyzed using scanning electron microscopy to observe structural changes before and after gas permeation, with respect to the type of gas used. Fourier-transform infrared spectroscopy was used to assess molecular changes induced by lactic acid addition and to investigate gas-specific differences in pore formation. Thermal stability was evaluated via thermogravimetric analysis in relation to pore development. Additionally, the porosity, Gurley values, and gas permeance were measured to compare the effects of N₂ and CO₂ on the physical properties of the membranes.

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醋酸纤维素膜气驱孔隙控制：氮气和二氧化碳对微孔形成的影响。

醋酸纤维素（CA）是一种广泛应用于各种工业用途的多孔材料，其加工方法也在不断发展。这项研究提出了一种通过用二氧化碳（CO2）取代氮气（N2）来提高孔隙形成效率的新方法，二氧化碳是一种具有更高四极矩的气体。采用该方法制备了涂覆在聚丙烯基板上的乳酸增塑CA膜，实现了孔径和孔隙率的控制。利用扫描电子显微镜分析表面形貌，观察气体渗透前后的结构变化，以及所用气体的类型。傅里叶变换红外光谱分析了乳酸添加引起的分子变化，并研究了孔隙形成的气体特异性差异。热稳定性通过热重分析与孔隙发育的关系进行评价。此外，还测量了孔隙度、Gurley值和透气性，以比较N2和CO2对膜物理性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomacromolecules 化学-高分子科学

CiteScore

10.60

自引率

4.80%

发文量

417

审稿时长

1.6 months

期刊介绍： Biomacromolecules is a leading forum for the dissemination of cutting-edge research at the interface of polymer science and biology. Submissions to Biomacromolecules should contain strong elements of innovation in terms of macromolecular design, synthesis and characterization, or in the application of polymer materials to biology and medicine. Topics covered by Biomacromolecules include, but are not exclusively limited to: sustainable polymers, polymers based on natural and renewable resources, degradable polymers, polymer conjugates, polymeric drugs, polymers in biocatalysis, biomacromolecular assembly, biomimetic polymers, polymer-biomineral hybrids, biomimetic-polymer processing, polymer recycling, bioactive polymer surfaces, original polymer design for biomedical applications such as immunotherapy, drug delivery, gene delivery, antimicrobial applications, diagnostic imaging and biosensing, polymers in tissue engineering and regenerative medicine, polymeric scaffolds and hydrogels for cell culture and delivery.