Preparation and characterization of high-hydrophilic polyhydroxy functional PP hollow fiber membrane

Wang, Lei; Wei, Junfu; Zhao, Kongyin; Wu, Bo

doi:10.1016/j.matlet.2015.06.089

Cited by 11 publications

(5 citation statements)

References 14 publications

(13 reference statements)

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“…The electron microscopy test proved that the modification was successful. When the graft ratio was 13.3%, the water contact angle of the film was 46 • , which was significantly lower than that of the original film (64 • ) [134]. Up to a certain value, as the grafting rate was increased, the water flux increased.…”

Section: Surface Graftingmentioning

confidence: 88%

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

et al. 2020

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Compared with the traditional activated sludge process, a membrane bioreactor (MBR) has many advantages, such as good effluent quality, small floor space, low residual sludge yield and easy automatic control. It has a promising prospect in wastewater treatment and reuse. However, membrane fouling is the biggest obstacle to the wide application of MBR. This paper aims at summarizing the new research progress of membrane fouling mechanism, control, prediction and detection in the MBR systems. Classification, mechanism, influencing factors and control of membrane fouling, membrane life prediction and online monitoring of membrane fouling are discussed. The research trends of relevant research areas in MBR membrane fouling are prospected.

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Section: Surface Graftingmentioning

confidence: 88%

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

et al. 2020

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“…After that, the fouled membrane was cleaned by ultrasound for 15 min, and finally, the pure water flux of the rinsed membrane (J 2 ) was measured again. The flux recovery ratio (FRR) was calculated using Equation (10).…”

Section: Antifouling Property Evaluationmentioning

confidence: 99%

“…[6][7][8] There are many materials used in membrane separation technology. The commonly used polymer membrane materials include poly (vinylidene fluoride) (PVDF), [9] polypropylene (PP), [10] and polyethersulfone (PES). [11] Due to the different processing methods of the membrane, the prepared membrane has a loose structure and low strength.…”

Section: Introductionmentioning

confidence: 99%

Preparation of fiber core support UHMWPE/SiO₂ composite hollow fiber membrane toward enhancing structure stability and antifouling

Zhu

2021

Polymer Engineering & Sci

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The purpose of this study was to reduce the severe shrinkage of the UHMWPE membrane during low‐concentration molding processing. In this study, using SiO2 inorganic particles as inner reinforced materials and copper fibers as core support bodies significantly improved the structural stability of the membrane. Compared with the UHMWPE membrane, the shrinkage of the length and diameter of the Cu@UHMWPE/SiO2 membranes decreased by 84% and 61%, respectively, and the pure water flux increased by 322%. Copper fiber as a support material reduced the shrinkage of the membrane and improved pore connectivity. The tensile strength of Cu@UHMWPE/SiO2 was 6.8 MPa. Additionally, the Cu@UHMWPE/SiO2 membrane exerted a better antifouling performance. This study provided a new method to improve the structural stability of the UHMWPE membrane.

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“…Polypropylene (PP) hollow fiber membrane has been widely used in numerous separation processes for their advantages of excellent mechanical strength, good chemical and thermal stability, as well as low cost . However, the immanent hydrophobicity of PP membrane makes it easy to be polluted during the filtration, causing degressive separation performance, shorter working life, as well as higher energy consumption . Hence, lots of efforts have been devoted to enhancing the antifouling property of PP membranes.…”

Section: Introductionmentioning

confidence: 99%

Interface engineering of polypropylene hollow fiber membrane through ultrasonic capillary effect and nucleophilic substitution

Shao

Liang³

et al. 2018

Polymers for Advanced Techs

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Interface engineering has been considered to be very critical for achieving polymer membranes with high performances. The main objective of this study is to establish a guideline for controlling the microstructure of membranes through ultrasonic capillary effect and nucleophilic substitution. Our key strategy is to construct micro/nano surface structures of polypropylene hollow fiber membranes grafted by glycidyl methacrylate in the ultrasonic assisted polymerization system. Then, zwitterionic surfaces of membranes were formed through the amino acids induced epoxy ring opening reaction. The formation mechanism of different morphology structures was discussed in detail. The effect of microstructures on the property of membranes was investigated systematically. When zwitterionic copolymers were uniformly formed on the membranes layer by layer, in the presence of threonine, the excellent bovine serum albumin rejection and antifouling properties were achieved. In contrast, zwitterionic copolymers appeared on the membranes as collapsed droplets in the case of glycine, and the relevant properties of membranes were decreased evidently. This study can provide a novel and facile protocol for constructing microstructures on the membrane surface, improving the performance. KEYWORDS interface engineering, microstructure, nucleophilic substitution, polypropylene hollow fiber membrane, ultrasonic capillary effect 1 | INTRODUCTION Polypropylene (PP) hollow fiber membrane has been widely used in numerous separation processes for their advantages of excellent mechanical strength, good chemical and thermal stability, as well as low cost. 1-3 However, the immanent hydrophobicity of PP membranemakes it easy to be polluted during the filtration, causing degressive separation performance, shorter working life, as well as higher energy consumption. 4,5 Hence, lots of efforts have been devoted to enhancing the antifouling property of PP membranes. Surface grafting is considered to be an effective approach for its versatility in chemical structure and geometry controls. [6][7][8] Meanwhile, it has become increasingly prevalent to construct the durable antifouling surfaces by grafting zwitterionic copolymers. 9,10 Glycidyl methacrylate (GMA) and amino acid have been frequently applied in the construction of zwitterionic surfaces on the membrane. In view of process conditions, their applications are threefold. First, poly (glycidyl methacrylate) is synthesized, then polymer membranes blended with it are prepared, and the epoxy ring is opened in the presence of amino acids. 11 Second, amino acids are anchored on the GMA grafted polymers via the epoxy ring opening reaction, then polymer membranes blended with the graft polymer are fabricated. 12 Third, GMA is grafted on the surface of polymer membranes, then amino acids reacts with epoxy rings. 13 To sum up, above methods improved the properties of membranes, such as permeation flux, separation as well as anti-fouling properties. Effect of amino acid nature on the membrane property has been ...

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Preparation and characterization of high-hydrophilic polyhydroxy functional PP hollow fiber membrane

Cited by 11 publications

References 14 publications

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

Preparation of fiber core support UHMWPE/SiO₂ composite hollow fiber membrane toward enhancing structure stability and antifouling

Interface engineering of polypropylene hollow fiber membrane through ultrasonic capillary effect and nucleophilic substitution

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Preparation and characterization of high-hydrophilic polyhydroxy functional PP hollow fiber membrane

Cited by 11 publications

References 14 publications

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

Preparation of fiber core support UHMWPE/SiO2 composite hollow fiber membrane toward enhancing structure stability and antifouling

Interface engineering of polypropylene hollow fiber membrane through ultrasonic capillary effect and nucleophilic substitution

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Preparation of fiber core support UHMWPE/SiO₂ composite hollow fiber membrane toward enhancing structure stability and antifouling