Preparation and characterization of composite membranes of polysulfone and microcrystalline cellulose

Zhang, Liping; Chen, Guowei; Tang, Huanwei; Cheng, Qiuming; Wang, Siqun

doi:10.1002/app.29434

Cited by 25 publications

(12 citation statements)

References 10 publications

(19 reference statements)

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“…RNSF with its very high surface area has plenty of hydroxyl and carboxylic functional groups at their surface which can attract the charged lime nanoparticles. Similar observation was found in previous work in case of using microcrystalline cellulose, cellulose nanocrystals or cellulose nanofibers isolated from bleached pulps when rejection of bovine serum albumin (BSA) was studied [25,27,36]. Although addition of cellulose nanocrystals or nanofibers to PSF resulted in increasing porosity and water flux, rejection of BSA (protein with charged surface) did not significantly affect by the increased porosity or water flux.…”

Section: Resultssupporting

confidence: 83%

Effect of Unbleached Rice Straw Cellulose Nanofibers on the Properties of Polysulfone Membranes

et al. 2019

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In addition to their lower cost and more environmentally friendly nature, cellulose nanofibers isolated from unbleached pulps offer different surface properties and functionality than those isolated from bleached pulps. At the same time, nanofibers isolated from unbleached pulps keep interesting properties such as hydrophilicity and mechanical strength, close to those isolated from bleached pulps. In the current work, rice straw nanofibers (RSNF) isolated from unbleached neutral sulfite pulp (lignin content 14%) were used with polysulfone (PSF) polymer to make membrane via phase inversion. The effect of RSNF on microstructure, porosity, hydrophilicity, mechanical properties, water flux, and fouling of PSF membranes was studied. In addition, the prepared membranes were tested to remove lime nanoparticles, an example of medium-size nanoparticles. The results showed that using RSNF at loadings from 0.5 to 2 wt.% can significantly increase hydrophilicity, porosity, water flux, and antifouling properties of PSF. RSNF also brought about an increase in rejection of lime nanoparticles (up to 98% rejection) from their aqueous suspension, and at the same time, with increasing flux across the membranes. Tensile strength of the membranes improved by ~29% with addition of RSNF and the maximum improvement was obtained on using 0.5% of RSNF, while Young’s modulus improved by ~40% at the same RSNF loading. As compared to previous published results on using cellulose nanofibers isolated from bleached pulps, the obtained results in the current work showed potential application of nanofibers isolated from unbleached pulps for improving important properties of PSF membranes, such as hydrophilicity, water flux, rejection, and antifouling properties.

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Section: Resultssupporting

confidence: 83%

Effect of Unbleached Rice Straw Cellulose Nanofibers on the Properties of Polysulfone Membranes

et al. 2019

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“…The addition of cellulose fi bers in PSf membranes proposed and carried out by this study increased the permeate fl ux. Zhang et al [4] observed the same, though in their work the PSf membranes were prepared with the addition of MCC.…”

Section: Pure Water Permeate Fl Uxmentioning

confidence: 70%

“…When Zhang et al [4] modifi ed PSf membranes with the addition of MCC, a casting solution of PSf/MCC blend was obtained. MCC changed the morphological structure of the membranes, by good distribution of MCC in PSf composite membrane, and thereby changed their properties regarding pure water fl ux and bovine serum albumin (BSA) solution retention.…”

Section: Introductionmentioning

confidence: 99%

Effect of cellulose fi bers on morphology and pure water permeation of PSf membranes

Santos

Pacheco

Poletto

et al. 2011

Desalination and Water Treatment

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A B S T R AC TChemical and physical changes are necessary to improve the transport properties of polymeric membranes. Cellulose fi ber pulp from Pinus taeda was processed in knives and balls mills in order to reduce the dimensions of the fi bers for later application in polysulfone (PSf) membranes. By adding cellulosic fi bers in PSf membranes, a composite membrane with improved morphological properties, permeate fl ux and good resistance to pressure was obtained. The fi bers as well as the PSf and PSf/cellulose fi bers membranes were morphologically characterized by scanning electron microscopy. Tests of pure water permeate fl ux were performed with pressure up to 20 bar. The addition of 0.2% (wt) of cellulose fi bers in the formation of composite membranes resulted in the elimination of macrovoids, causing an increase in pure water fl ux (50% ± 10) when pressure was risen.

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“…The membrane porosity was tested according to the method described in the literature [26]. The membranes were weighed when wet and were later dried in an oven.…”

Section: Methodsmentioning

confidence: 99%

Preparation and Characterization of Hydrophilically Modified PVDF Membranes by a Novel Nonsolvent Thermally Induced Phase Separation Method

Xiao

Cai

et al. 2016

Membranes

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In this study, a nonsolvent thermally-induced phase separation (NTIPS) method was first proposed to fabricate hydrophilically-modified poly(vinylidene fluoride) (PVDF) membranes to overcome the drawbacks of conventional thermally-induced phase separation (TIPS) and nonsolvent-induced phase separation (NIPS) methods. Hydrophilically-modified PVDF membranes were successfully prepared by blending in hydrophilic polymer polyvinyl alcohol (PVA) at 140 °C. A series of PVDF/PVA blend membranes was prepared at different total polymer concentrations and blend ratios. The morphological analysis via SEM indicated that the formation mechanism of these hydrophilically-modified membranes was a combined NIPS and TIPS process. As the total polymer concentration increased, the tensile strength of the membranes increased; meanwhile, the membrane pore size, porosity and water flux decreased. With the PVDF/PVA blend ratio increased from 10:0 to 8:2, the membrane pore size and water flux increased. The dynamic water contact angle of these membranes showed that the hydrophilic properties of PVDF/PVA blend membranes were prominently improved. The higher hydrophilicity of the membranes resulted in reduced membrane resistance and, hence, higher permeability. The total resistance Rt of the modified PVDF membranes decreased significantly as the hydrophilicity increased. The irreversible fouling related to pore blocking and adsorption fouling onto the membrane surface was minimal, indicating good antifouling properties.

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Preparation and characterization of composite membranes of polysulfone and microcrystalline cellulose

Cited by 25 publications

References 10 publications

Effect of Unbleached Rice Straw Cellulose Nanofibers on the Properties of Polysulfone Membranes

Effect of Unbleached Rice Straw Cellulose Nanofibers on the Properties of Polysulfone Membranes

Effect of cellulose fi bers on morphology and pure water permeation of PSf membranes

Preparation and Characterization of Hydrophilically Modified PVDF Membranes by a Novel Nonsolvent Thermally Induced Phase Separation Method

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