Study on interface structure and performance of homogeneous-reinforced polyvinyl chloride hollow fiber membranes

Liu, Hailiang; Xiao, Changfa; Huang, Qinglin; Fan, Zhili; Hu, Xiaoyu; Shu, Wei

doi:10.1007/s13726-015-0340-5

Cited by 9 publications

(5 citation statements)

References 27 publications

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“…They found that the interfacial bonding state of prepared PAN hollow fiber membranes reinforced by PAN homogeneous tubular braid was better than that reinforced by PET heterogeneous tubular braid. However, the swelling of the tubular braids would prevent the infiltration of casting solution to the tubular braids and easily formed the dense interface between the separation layer and tubular braid in the preparation process of homogeneous braid reinforced hollow fiber membranes, which might decrease the membrane permeability . The composite formation of polymers and tubular braid were divided into surface compositing type and embedded compositing type.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance of braid‐reinforced poly(vinyl chloride) hollow fiber membranes

Liu

Wang

Mao

et al. 2017

J of Applied Polymer Sci

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A novel braid‐reinforced (BR) poly(vinyl chloride) (PVC) hollow fiber membrane was fabricated via dry‐wet spinning process. The mixtures of PVC polymer solutions were uniformly coated on the tubular braid which contained polyester (PET) and polyacrylonitrile (PAN) fibers. The influences of braid composition on structure and performance of BR PVC hollow fiber membranes were investigated. The results showed that the prepared BR PVC hollow fiber membranes were composed of two layers which contained separation layer and tubular braid supported layer when the PET and PET/PAN hybrid tubular braids were used as the reinforcement. But the sandwich structure appeared when the PAN tubular braid was used as the reinforcement, which revealed outer separation layer, tubular braid supported layer and the inner polymer layer. The BR PVC hollow fiber membranes that prepared by PET/PAN hybrid tubular braid had favorable interfacial bonding state compared with the membrane prepared by pure PET or PAN tubular braid. The pure water flux of the BR PVC hollow fiber membranes that prepared by the PET/PAN hybrid tubular braid were lower than that prepared by pure PET or PAN tubular braid, but the rejection of Bovine serum albumin was opposite. The tensile strength of prepared BR PVC hollow fiber membrane was higher than 50 MPa. Both of the tensile strength and elongation at break decreased with the increase of the PAN filaments in the PET/PAN hybrid tubular braid. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45068.

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Section: Introductionmentioning

confidence: 99%

Preparation and performance of braid‐reinforced poly(vinyl chloride) hollow fiber membranes

Liu

Wang

Mao

et al. 2017

J of Applied Polymer Sci

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“…So, the prepared membrane treated with dilute HCl showed a decrease in WCA (see Table ), and the WCA were lower as iron alkoxide concentrations in the membranes increased. During the acid treatment, iron alkoxide dissolution in acid medium leads to the formation of nano‐ and microlevel voids in the membrane surface and inside, and this could be the reason for the change in WCA . Similar type of changes has been explained based on the concept of Cassie–Baxter and Wenzel state for the decline of water contact angles (CAs) on smoother surfaces .…”

Section: Resultsmentioning

confidence: 81%

“…Many commercial membranes employ organic additives such as polyethylene glycol (PEG), polyvinyl pyrrolidone, and polyvinyl alcohol with varying molecular weight to achieve the desired membrane morphology and molecular weight cutoff . Similarly, nonsolvent additives like triglycol, tween‐80, and inorganic salt lithium chloride are also reported as additive in membrane preparation . However, all of the aforementioned commercial additives tend to create/form secondary pollutants which have to be separated.…”

Section: Introductionmentioning

confidence: 99%

Tuning the morphology of PVDF membranes using inorganic clusters for oil/water separation

Muthukumar

Kaleekkal

Lakshmi

et al. 2019

J of Applied Polymer Sci

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Polyvinylidene fluoride (PVDF) membranes with modified membrane morphology were prepared by phase inversion process using iron alkoxide as a novel pore-forming additive (PFA). Higher pure water flux was observed for PVDF/PFA (iron alkoxide) membranes treated with 5% HCl, due to higher porosity produced by the leaching out of the iron alkoxide additive. The untreated membrane containing 0.04% iron alkoxide showed~99% efficiency oil removal from a surfactant-stabilized oil-water emulsion. After acid treatment, there was a slight decrease in the rejection efficiency (~96.5%); however, this membrane still exhibited the highest emulsion flux. The fouling propensity of the membrane with 0.04 wt % iron alkoxide tested in a crossflow condition decreases indicating a lower amount of oil adsorbed onto the surface and a greater flux recovery ratio. The treated membranes showed appreciable antibiofouling property when the membranes were challenged with Escherichia coli and Bacillus subtilis obtained from freshwater and/or seawater.Many commercial membranes employ organic additives such as polyethylene glycol (PEG), 10 polyvinyl pyrrolidone, 11 and polyvinyl alcohol with varying molecular weight to achieve the desired membrane morphology and molecular weight cutoff. 12 Similarly, nonsolvent Additional Supporting Information may be found in the online version of this article.

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“…To measure the membrane rejection, the HA concentrations of feed and permeate solutions were determined using a UV spectrophotometer (Bio Quest CE2501) and the HA rejection of membrane was calculated using Eq (15) as follows [52,53]:…”

Section: Analyses Of Fouling Resistancesmentioning

confidence: 99%

Synthesis, characterization, and anti-fouling properties of cellulose acetate/polyethylene glycol-grafted nanodiamond nanocomposite membranes for humic acid removal from contaminated water

et al. 2018

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Polyethylene glycol-grafted nanodiamond (ND-PEG) was synthesized from pristine detonation NDs and utilized to prepare novel cellulose acetate/polyethylene glycol-grafted nanodiamond(CA/ND-PEG)nanocomposite membranes. Due to unique thermal, mechanical, and antibacterial properties and very easy cleaning of fouled ND-embedded CA nanocomposite membranes, we tried to investigate the performance of CA/ND-PEG membrane for humic acid (HA) removal from contaminated water. Surface functionalization was confirmed by Fourier transform infrared spectroscopy and thermogravimetry analysis. Pristine and functionalized ND with different concentration was added in the casting solution containing CA. The prepared membranes were characterized using contact angle, mechanical strength, scanning electron microscopy (SEM), transmission electron microscopy, and permeation tests. SEM micrographs of the surface of the membranes depicted the increase in the number of pores by the addition of ND and especially ND-PEG into polymer matrix. The results indicated that the nanocomposite membrane with 0.5 wt% ND-PEG exhibited excellent hydrophilicity, mechanical properties, permeability, high rejection, high abrasion resistance, and good anti-fouling performance. The HA adsorption on the membrane surface decreased from 2.85 to 2.15 mg cm −2 when the ND-PEG content increased from 0 to 0.5 wt%. Most importantly, the HA filtration experiments revealed that the incorporation of ND and especially ND-PEG particles reduced membrane irreversible fouling, dramatically. Meanwhile, the analysis of the fouling mechanism based on Hermia's model revealed that cake formation is a prevailing mechanism for all membranes.

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Study on interface structure and performance of homogeneous-reinforced polyvinyl chloride hollow fiber membranes

Cited by 9 publications

References 27 publications

Preparation and performance of braid‐reinforced poly(vinyl chloride) hollow fiber membranes

Preparation and performance of braid‐reinforced poly(vinyl chloride) hollow fiber membranes

Tuning the morphology of PVDF membranes using inorganic clusters for oil/water separation

Synthesis, characterization, and anti-fouling properties of cellulose acetate/polyethylene glycol-grafted nanodiamond nanocomposite membranes for humic acid removal from contaminated water

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