A novel 5-sulfosalicylic acid - Polyvinyl alcohol - Hydroxyethyl cellulose vapor permeation membrane for gas dehumidification. (21st July 2022)

• Record Type: Journal Article
• Authors: Yue, Dongmin; Zhang, Hao; Liu, MeiLing; Li, Bingbing; Ge, Yanxia; Sun, De; Li, Fenggang
• Is Part Of: Polymer. Volume 254(2022)
• Publication Date: 2022-07-21
• Subjects: Hydroxyethyl cellulose -- Polyvinyl alcohol -- Dehumidification performance; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2022.125048
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract : The crystallinity and the hydrophilicity are the two main factors influencing the membrane's vapor permeability for gas dehumidification. Herein, a novel 5-sulfosalicylic acid-polyvinyl alcohol-hydroxyethyl cellulose (SSA-PVA-HEC) vapor permeation membrane composing SSA capturing water layer and PVA-HEC transporting water layer was prepared. To reduce membrane crystallinity and increase vapor permeability, HEC was added to the PVA membrane matrix to form a transporting water PVA-HEC layer. To further improve the PVA-HEC layer's permeability, the surface of the PVA-HEC membrane was modified by the hydrophilic SSA, which acted as a capturing water layer. The results showed that the water vapor permeability of the SSA-PVA-HEC membrane improved from 1.19 × 10 4 to 1.52 × 10 5 Barrer. After dealt with SSA-PVA-HEC membrane, the relative humidity (RH%) of the feed (humid nitrogen) decreased from 90% to 23.4%. Overall, the low cost and the excellent dehumidification performance of the SSA-PVA-HEC membrane make it possible for industrialization. Graphical abstract: Image 1 Highlights: The SSA-PVA-HEC gas dehumidification membrane was prepared. HEC was added into PVA matrix to reduce the crystallinity of the membrane. SSA was grafted on the surface of the membrane to improve the permeability.