A novel, green method for the preparation of biodegradable PLA membranes without pore-forming agent

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-05-01 DOI:10.1016/j.jwpe.2025.107841

Jiayi Cai , Zunbo Han , Yinjie Sun , Haoran Chen , Haoran Li , Ruoxi Wang , Yanhong Ji , Benqiao He

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Abstract

Polylactic acid (PLA) membranes have attracted significant attention in separation technologies due to their biodegradable properties. This study proposes a novel and eco-friendly pore-forming strategy for fabricating PLA membranes by triggering the in situ reaction between CaCO₃ nanoparticles and citric acid during the phase inversion process. Unlike conventional methods requiring synthetic pore-forming additives, this approach leverages the sacrificial role of CaCO₃ and the reaction-generated CO₂ nanobubble to synergistically construct a porous structure. The overall porosity increases from 70.2 % (pristine PLA membrane, M0) to 85.6 % (membrane prepared from a 6 wt% CaCO₃-containing casting solution, M6), while pure water flux rises dramatically from 20.1 L·m⁻²·h⁻¹ to 218.3 L·m⁻²·h⁻¹, with bovine serum albumin rejection maintained at 96.8 %. Furthermore, the flux recovery rate improves from 53.2 % (M0) to 71.2 % (M6), demonstrating enhanced antifouling properties. This entirely green fabrication process, employing only natural CaCO₃ and citric acid, represents a significant advancement in sustainable membrane technology and provides a viable route for developing high-performance biodegradable separation membranes.

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一种新的、绿色的制备生物可降解聚乳酸膜的方法

聚乳酸（PLA）膜由于其可生物降解的特性，在分离技术中引起了广泛的关注。本研究提出了一种新型的环保成孔策略，通过在相转化过程中触发CaCO3纳米颗粒与柠檬酸之间的原位反应来制备PLA膜。与需要合成成孔添加剂的传统方法不同，该方法利用CaCO3的牺牲作用和反应产生的CO2纳米泡协同构建多孔结构。总体孔隙率从70.2%（原始PLA膜，M0）增加到85.6%（含6wt % caco3的铸造溶液，M6），纯水通量从20.1 L·m−2·h−1急剧增加到218.3 L·m−2·h−1，牛血清白蛋白排斥率保持在96.8%。此外，助熔剂回收率从53.2% （M0）提高到71.2% (M6)，显示出增强的防污性能。这种完全绿色的制造工艺，只使用天然CaCO3和柠檬酸，代表了可持续膜技术的重大进步，为开发高性能的可生物降解分离膜提供了一条可行的途径。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies