Improvement of filtration performance of polyvinyl chloride/cellulose acetate blend membrane via acid hydrolysis

Zhang, Yong; Tan, Lin; Yao, Anrong; Tan, Pengfei; Guo, Ronghui; Zhou, Mi; Zhu, Ping; Huang, Shih-Chien; Wu, Yunheng

doi:10.1002/app.50312

Cited by 15 publications

(12 citation statements)

References 34 publications

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“…The hydrophilicity/hydrophobicity of the membrane surface is an important factor affecting the membrane performance, and the water contact angle (WCA) can reflect the hydrophilicity of the membrane surface to a certain extent. Generally, membranes with smaller WCAs are more hydrophilic. , As shown in Figure a, the WCA of the CA membrane is 75.6 ± 5.3°. After EPDMDAC modification, the WCA of the QCA- X membrane becomes smaller, which may be due to the stronger ability of cationic quaternary ammonium salt groups introduced into the membrane surface through electrostatic interactions to attract and bind water molecules, thus improving the hydrophilicity of the membrane .…”

Section: Resultsmentioning

confidence: 94%

Improvement of Antibacterial and Antifouling Properties of a Cellulose Acetate Membrane by Surface Grafting Quaternary Ammonium Salt

Zhou

Jiang

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Through etherification reaction, epoxy propyl dimethyl dodecyl ammonium chloride (EPDMDAC) was grafted onto the surface of a cellulose acetate (CA) membrane to prepare a stable nonleaching antibacterial antifouling membrane (QCA-X). The results showed that with the extension of grafting reaction time, the quaternary ammonium salt groups on the membrane surface increased and the hydrophilicity was enhanced. Compared with those of the CA membrane, the filtration capacity and antifouling performance of the QCA-X membrane are improved. When the grafting time is 4 h, the water permeability and flux recovery rate of the QCA-4 membrane are increased by 139 and 21.5%, respectively. The QCA-X membrane showed excellent antibacterial performance, and the sterilization rate against S. aureus and E. coli was more than 99.99%. After four repeated antibacterial cycles, the bactericidal rates against S. aureus and E. coli were maintained at about 99.69 ± 0.02 and 99.98 ± 0.02%, respectively, with good antibacterial persistence. Moreover, the QCA-X membrane can effectively inhibit bacterial adhesion. Mild and simple EPDMDAC grafting modifications improve the antibacterial, antifouling, and antibioadhesion properties of the CA membrane, showing its application potential in long-term water treatment, especially in biofouling water treatment.

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Section: Resultsmentioning

confidence: 94%

Improvement of Antibacterial and Antifouling Properties of a Cellulose Acetate Membrane by Surface Grafting Quaternary Ammonium Salt

Zhou

Jiang

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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“…These absorption peaks are the characteristic peaks of PU (Riaz et al 2016;Yin et al 2018;Tan et al 2015). The absorption peak at 3465cm − 1 is the stretching vibration peak of O-H, which belongs to the characteristic peak of CA (Zhang et al 2021). After PU and CA were blended, the strength of the stretching vibration peak and bending vibration peak of N-H decreased, while the stretching vibration peak of O-H moved to the high wave number direction, which may be caused by the formation of hydrogen bond between the hydroxyl group of CA and the amino group of PU.…”

Section: Infrared Spectroscopy and Thermogravimetric Analysismentioning

confidence: 97%

“…4a. The water contact angle (WCA) of CA nano ber membrane is 64.3°, which may be caused by the hydrophilicity of ester groups and incompletely esteri ed hydroxyl groups of CA molecular chain (Zhang et al 2021). The WCA of PU nano ber membrane is 123.8°, indicating that PU membrane is hydrophobic.…”

Section: Wettability Of Ca Ca/pu and Pu Nano Ber Membranesmentioning

confidence: 99%

“…It has good biocompatibility, good hydrophilicity, fouling resistance and chlorine resistance. Its disadvantages are poor mechanical strength and low chemical resistance (Yao et al 2021;Zhang et al 2021;Jiang et al 2020;Nosar et al 2016). PU is a copolymer formed by alternating arrangement of soft and hard chain segments, which has unique mechanical properties, such as higher tensile strength, exibility and ability to withstand extreme temperature conditions, which makes PU competitive in many industrial membrane separation applications (Zavastin et al 2010;Riaz et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Transition sandwich Janus membrane of cellulose acetate and polyurethane nanofibers for oil–water separation

et al. 2022

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Through sequential electrospinning, a sandwich Janus membrane (PU-(CA/PU)-CA) was constructed with hydrophobic polyurethane (PU) nano ber membrane as the top layer, cellulose acetate/polyurethane (CA/PU) blend nano ber membrane as the intermediate transition layer and hydrophilic cellulose acetate (CA) nano ber membrane as the bottom layer. The effects of membrane structure, composition and thickness on the mechanical properties, permeability and separation ability of PU-(CA/PU)-CA nano ber membrane were studied. The results show that the transition sandwich structure PU-(CA/PU)-CA membrane has good mechanical properties, high permeability and selective separation ability, and can realize the unidirectional transmission of water and e cient oil-water separation. When the membrane thickness is 80 μm, the hydraulic permeability is 3.4×10 4 L/(m 2 h bar), the oil-water separation e ciency reaches 99%, and the tensile strength is 95.8% higher than that of the double-layer PU-CA membrane without intermediate transition layer. The thermal stability and antifouling ability of PU-(CA/PU)-CA nano ber membrane have also been improved, and the reusability is good. CA/PU transition interlayer improves the interfacial compatibility between CA and PU nano ber membrane, enhances the performance of PU-(CA/PU)-CA nano ber Janus membrane, and shows its application prospect in the eld of separation and puri cation.

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“…is 64.3°, which may be caused by the hydrophilicity of ester groups and incompletely esteri ed hydroxyl groups of CA molecular chain(Zhang et al 2021). The WCA of PU nano ber membrane is 123.8°, indicating that PU membrane is hydrophobic.…”

mentioning

confidence: 99%

Transition Sandwich Janus Membrane of Cellulose Acetate and Polyurethane Nanofibers For Oil-Water Separation

Zhang¹,

Yang²,

Zhou³

et al. 2021

Preprint

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Through sequential electrospinning, a sandwich Janus membrane (PU-(CA/PU)-CA) was constructed with hydrophobic polyurethane (PU) nanofiber membrane as the top layer, cellulose acetate/polyurethane (CA/PU) blend nanofiber membrane as the intermediate transition layer and hydrophilic cellulose acetate (CA) nanofiber membrane as the bottom layer. The effects of membrane structure, composition and thickness on the mechanical properties, permeability and separation ability of PU-(CA/PU)-CA nanofiber membrane were studied. The results show that the transition sandwich structure PU-(CA/PU)-CA membrane has good mechanical properties, high permeability and selective separation ability, and can realize the unidirectional transmission of water and efficient oil-water separation. When the membrane thickness is 80 μm, the hydraulic permeability is 3.4×104 L/(m2 h bar), the oil-water separation efficiency reaches 99%, and the tensile strength is 95.8% higher than that of the double-layer PU-CA membrane without intermediate transition layer. The thermal stability and antifouling ability of PU-(CA/PU)-CA nanofiber membrane have also been improved, and the reusability is good. CA/PU transition interlayer improves the interfacial compatibility between CA and PU nanofiber membrane, enhances the performance of PU-(CA/PU)-CA nanofiber Janus membrane, and shows its application prospect in the field of separation and purification.

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Improvement of filtration performance of polyvinyl chloride/cellulose acetate blend membrane via acid hydrolysis

Cited by 15 publications

References 34 publications

Improvement of Antibacterial and Antifouling Properties of a Cellulose Acetate Membrane by Surface Grafting Quaternary Ammonium Salt

Improvement of Antibacterial and Antifouling Properties of a Cellulose Acetate Membrane by Surface Grafting Quaternary Ammonium Salt

Transition sandwich Janus membrane of cellulose acetate and polyurethane nanofibers for oil–water separation

Transition Sandwich Janus Membrane of Cellulose Acetate and Polyurethane Nanofibers For Oil-Water Separation

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