期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 37, 页码 42169-42178出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c12399
关键词
salt-responsive membrane; antipolyelectrolyte; gradient transport; macromolecules screening; oil/saline separation; polymer brush
资金
- Natural Science Foundation of China [51673175]
- Natural Science Foundation of Zhejiang Province [LZ20E030004, LY16E030012]
- program of Xinmiao (Potential) Talents in Zhejiang Province [2019R403056]
Continuously growing interest in the controlled and tunable transport or separation of target molecules has attracted more attention recently. However, traditional on-off stimuli-responsive membranes are limited to nongradient feedback, which manifests as filtration efficiency that cannot be increased or decreased gradually along with the different stimuli conditions; indeed, only the transformation of on/off state is visible. Herein, we design and fabricate a series of robust salt-responsive SiO2@cellulose membranes (SRMs) by simply combining salt-responsive poly[3-(dimethyl(4-vinylbenzyl)ammonium)propyl sulfonate] (polyDVBAPS)-modified SiO2 nanoparticles and cellulose membranes under negative-pressure filtering. The antipolyelectrolyte effect induces stretch/shrinkage of polyDVBAPS chains inside the channels and facilities the directional aperture size and surface wettability variation, greatly enhancing the variability of interfacial transport and separation efficiency. Due to the linear salt-responsive feedback mechanism, the optimal SRMs achieve highly efficient target macromolecule separation (>75%) and rapid oil/saline separation (>97%) with a continuous gradient and adjustable permeability, instead of simply an on-off switch. The salt-responsive factors (SiO2-polyDVBAPS) could be reversibly separated or self-assembled to membrane substrates; thus, SRMs achieved unprecedented repeatability and reusability even after long-term cyclic testing, which exceeds those of currently reported membranes. Such SRMs possess simultaneously a superfast responsive time, a controllable gradient permeability, a high gating ratio, and an excellent reusability, making our strategy a potentially exciting approach for efficient osmotic transportation and target molecule separation in a more controllable manner.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据