Preparation and characterizations of novel zwitterionic membranes

Liu, Junsheng; Zhan, Yin; Xu, Tongwen; Shao, Guoqing

doi:10.1016/j.memsci.2008.08.028

Cited by 17 publications

(8 citation statements)

References 36 publications

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“…Thus, improving their mechanical strength and thermal stability has turned into a key consideration for membrane preparation. Presently, various innovative routes, such as free‐radical polymerization,10 crosslinking,11, 12 and hybridization,6, 13, 14 have been developed for such purposes. Among these, crosslinking between polymeric matrices is regarded to be one of the most effective techniques for promoting the mechanical strength and thermal stability of PVA‐based polymeric membranes.…”

Section: Introductionmentioning

confidence: 99%

“…To increase the mechanical strength and thermal stability of polymeric membranes, an attempt was recently made to prepare and characterize functionalized polymeric membranes;10 it was found that the thermal stability of the polymeric membranes produced could be obviously elevated up to a desired value. Our interest in such a type of polymeric membranes stimulated us to do further research.…”

Section: Introductionmentioning

confidence: 99%

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Poly(vinyl alcohol)‐based polymeric membrane: Preparation and tensile properties

Dong

Liu

Yao

et al. 2011

J of Applied Polymer Sci

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A series of poly(vinyl alcohol) (PVA)-based single-layer organic polymeric membranes were prepared via the crosslinking of PVA with different amounts of formaldehyde. Meanwhile, for comparison, both a threelayer organic polymeric membrane and a hybrid composite membrane were also prepared by the layer-upon-layer method. Their thermal stability and tensile properties were investigated to examine the effect of crosslinking on the membrane performances. Thermogravimetric analysis and differential scanning calorimetry thermal analyses showed that the thermal degradation temperature of the singlelayer crosslinked membrane C reached up to 325 C. Tensile testing indicated that the three-layer organic polymeric membrane E had excellent tensile strength among these single-layer and three-layer membranes. The swelling properties revealed that the swelling degree value of these membranes decreased with an increase in methanol concentration; this suggests that they were not easily swollen by the methanol solution, which is meaningful for the separation of organic mixtures. Field emission scanning electron microscopy images exhibited that the crosslinking of functional groups impacted their structures and confirmed that their mechanical properties were related to their structures. These findings suggest that the crosslinking of functional groups is an effective method for adjusting the tensile strength of PVA-based organic polymeric membranes and related hybrid composite membranes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Poly(vinyl alcohol)‐based polymeric membrane: Preparation and tensile properties

Dong

Liu

Yao

et al. 2011

J of Applied Polymer Sci

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“…The experiment results showed that the amphoteric polymer membrane possesses the characteristics of anion‐exchange, and has good thermal stability, toughness, and strength. Generally, polymerizable betaine monomer is synthesized firstly, which can be homopolymerized and copolymerized with other monomers to obtain the corresponding amphoteric products 25 . At present, the betaine amphoteric polymer is widely developed.…”

Section: Amphoteric Polymermentioning

confidence: 99%

Amphoteric functional polymers for leather wet finishing auxiliaries: A review

Wang

Liu

et al. 2021

Polymers for Advanced Techs

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Amphoteric functional polymers containing anionic and cationic groups have the advantages of pH‐responsive function, self‐assembly, and anti‐polyelectrolyte effect, which have been diffusely applied in the healthcare industry, leather area, and so forth. Very recently, with the development of organic chrome‐free tanned ecological leather manufacturing technology, the anionic retanning and fatliquoring agents for traditional chrome tanning system have gradually lost their dominant position due to the weak interactions between positively charged collagen fibers and negatively charged wet finishing auxiliaries, resulting in a series of problems such as low dye uptake, uneven dyeing, and so forth. To address this issue, recent researches have been devoted to developing amphoteric polymers for leather retanning and fatliquoring processes. In this review, we give a comprehensive overview of the preparation and application of amphoteric materials for leather retanning and fatliquoring agents. With the perspective of their properties, current challenges, and outlook in the future, crafting functional and environmentally friendly amphoteric materials are further put forward. The development and application of amphoteric polymer wet finishing auxiliaries will greatly promote the integrated manufacturing of ecological leather, and further motivate the upgrading, transformation, and sustainable development of the traditional leather industry.

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“…The conventional free radical graft technique is a facile and effective approach to prepare composite membrane or modify the membrane surface with improved permselectivity and antifouling properties. Liu et al [ 126 ] prepared zwitterionic membranes by free radical polymerization between glycidylmethacrylate (GMA) and acrylic acid (AA) monomers, resulting in the ring-opening of epoxide and quaternary amination with trimethylamine hydrochloride. Because both anionic and cationic groups simultaneously exist in the membrane matrix, there is high net charge density, which facilitates the transport of anions and cations through the membrane.…”

Section: Fabrication Of Nanofiltration Membranes Containing Ion Pamentioning

confidence: 99%

Recent Advances in the Fabrication of Membranes Containing “Ion Pairs” for Nanofiltration Processes

et al. 2017

Polymers

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Abstract:In the face of serious environmental pollution and water scarcity problems, the membrane separation technique, especially high efficiency, low energy consumption, and environmental friendly nanofiltration, has been quickly developed. Separation membranes with high permeability, good selectivity, and strong antifouling properties are critical for water treatment and green chemical processing. In recent years, researchers have paid more and more attention to the development of high performance nanofiltration membranes containing "ion pairs". In this review, the effects of "ion pairs" characteristics, such as the super-hydrophilicity, controllable charge character, and antifouling property, on nanofiltration performances are discussed. A systematic survey was carried out on the various approaches and multiple regulation factors in the fabrication of polyelectrolyte complex membranes, zwitterionic membranes, and charged mosaic membranes, respectively. The mass transport behavior and antifouling mechanism of the membranes with "ion pairs" are also discussed. Finally, we present a brief perspective on the future development of advanced nanofiltration membranes with "ion pairs".

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Preparation and characterizations of novel zwitterionic membranes

Cited by 17 publications

References 36 publications

Poly(vinyl alcohol)‐based polymeric membrane: Preparation and tensile properties

Poly(vinyl alcohol)‐based polymeric membrane: Preparation and tensile properties

Amphoteric functional polymers for leather wet finishing auxiliaries: A review

Recent Advances in the Fabrication of Membranes Containing “Ion Pairs” for Nanofiltration Processes

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