文献类型：期刊文献

英文题名：Design of cell structures in PLA-based foams via supercritical CO? foaming: enabling ultrafast and high-capacity oil adsorption

作者：Guo, Wentao[1]; Yuan, Jie[1]; Gao, Xiulu[1]; Wang, Zhirui[1]; Chen, Yichong[1]; Zhao, Ling[1]; Hu, Dongdong[1]

机构：[1] State Key Laboratory of Chemical Engineering and Low-Carbon Technology, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2026

卷号：382

外文期刊名：Separation and Purification Technology

收录：EI(收录号：20254619491008)

语种：英文

外文关键词：Adsorption - Carbon dioxide - Cell culture - Cells - Foams - Lactic acid - Structural design - Structural optimization

摘要：This work systematically investigates the regulation of cell structure and oil adsorption properties of polylactic acid (PLA)-based composites via supercritical CO2 foaming. Four typical foams with distinct cell structure are successfully prepared through optimized foaming processes, including uniform-cell, sandwich-structured, and gradient-cell. Using a two-step full saturation foaming approach, PLA foams exhibit large structures, while PLA/polybutylene succinate (PLA/PBS) composites foams exhibit small structures. Sandwich-structured foams achieve integrated "external hydrophobicity-internal oil adsorption", demonstrating ultra-high separation efficiency for 10 vol% oil-in-water emulsions, outperforming uniform-cell counterparts. Gradient-cell structured PLA/polybutylene succinate-co-adipate (PLA/PBSA) foams, fabricated by controlling CO2 concentration gradients during non-equilibrium saturation. The design achieves excellent comprehensive adsorption performance, in the initial stage, it relies on the surface large-cell layer to quickly capture the oil phase (constant 42.32 × 10?3 g/g·s-1), and in the later stage, it realizes deep adsorption through the high specific surface area of the internal small-cell layer (19.7 g/g). By integrating material property and process optimization, this work establishes a generic framework for designing cell structures, providing theoretical guidance for the development of high-performance oil-adsorbing materials. ? 2025 Elsevier B.V.