scholarly journals Preparation and Characterization of Regenerated Cellulose Membrane Blended with ZrO2 Nanoparticles

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 42
Author(s):  
Xin Huang ◽  
Feng Tian ◽  
Guohong Chen ◽  
Fanan Wang ◽  
Rengui Weng ◽  
...  
Keyword(s):  
Rejection Rate ◽  
Zro2 Nanoparticles ◽  
Inversion Method ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Gravimetric Analysis ◽  
Green Materials ◽  
Membrane Flux ◽  
Separation Membrane ◽  
Phase Inversion Method

It is of great significance to search for efficient, renewable, biodegradable and economical membrane materials. Herein, we developed an organic-inorganic hybrid regenerated cellulose membrane (ZrO2/BCM) with excellent hydrophilic and anti-fouling properties. The membrane was prepared by introducing ZrO2 particles into an N-Methylmorpholine-N-oxide(NMMO)/bamboo cellulose(BC) solution system by the phase inversion method. The physi-chemical structure of the membranes were characterized based on thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (ATR-FTIR), field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD). The modified regenerated cellulose membrane has the excellent rejection of bovine serum albumin (BSA) and anti-fouling performance. The membrane flux of ZrO2/BCM is 321.49 (L/m2·h), and the rejection rate of BSA is 91.2%. Moreover, the membrane flux recovery rate after cleaning with deionized water was 90.6%. This new type of separation membrane prepared with green materials holds broad application potential in water purification and wastewater treatment.

Hemodialysis Membrane Prepared from Bacterial Cellulose/Lithium Chloride/N,N-Dimethylacetamide Solution

2014 ◽  
Vol 1048 ◽  
pp. 395-399 ◽  
Author(s):  
Jia Zhi Yang ◽  
Guang Mei Liu ◽  
Dong Ping Sun
Keyword(s):  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Phase Inversion ◽  
Inversion Method ◽  
Regenerated Cellulose ◽  
Vitamin B ◽  
Cellulose Membrane ◽  
Cellulose Membranes ◽  
Phase Inversion Method ◽  
Percentage Porosity

A new bacterial cellulose regenerated cellulose membrane (RBC) has been prepared by phase inversion method in LiCl/DMAC solution. The effects of coagulation concentrations on the physical properties of the RBC membranes were studied and optimized. Features of the RBC of membranes obtained using 0%~40% N,N-Dimethylacetamide (DMAC), such as water absorption percentage, porosity (Pr), ultrafilter rate (UFR), and tensile strength were investigated. The RBC membranes prepared with 40% DMAC solution as coagulant exhibit a smooth surface and a high tensile strength with suitable UFR. RBC showed improved permeabilities for urea and vitamin B12when compared with commercial cellulose membranes.

scholarly journals Transport Properties, Mechanical Behavior, Thermal and Chemical Resistance of Asymmetric Flat Sheet Membrane Prepared from PSf/PVDF Blended Membrane on Gauze Supporting Layer

2018 ◽  
Vol 18 (2) ◽  
pp. 257 ◽  
Author(s):  
Nita Kusumawati ◽  
Pirim Setiarso ◽  
Maria Monica Sianita ◽  
Supari Muslim
Keyword(s):  
Polyvinylidene Fluoride ◽  
Phase Inversion ◽  
Membrane Resistance ◽  
Porous Membrane ◽  
Inversion Method ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Color Changes ◽  
Casting Solution ◽  
Phase Inversion Method

Asymmetric polysulfone (PSf) membrane is prepared using phase inversion method and blending with polyvinylidene fluoride (PVDF) on the gauze solid support. Casting solution composition optimization has been done to get PSf/PVDF membrane with best characteristics and permeability. The result shows that blending on PSf with PVDF polymer using phase inversion method has been very helpful in creating an asymmetric porous membrane. Increased level of PVDF in casting solution has increased the formation of asymmetry structure and corresponding flux membrane. The result from thermal test using Differential Scanning Calorimetry (DSC)-Thermal Gravimetric Analysis (TGA) shows the resistance of the membrane to temperature 460 °C. Membrane resistance against acid looks from undetectable changes on infrared spectra after immersion process in H2SO4 6–98 v/v%. While membrane color changes from white to brownish and black is detected after the immersion process in sodium hydroxide (NaOH) 0.15–80 w/v%.

Preparation and Characterization of BaBi2Nb2O9/PVDF Inorganic-Organic Composite Ultrafiltration Membranes

2013 ◽  
Vol 681 ◽  
pp. 309-313
Author(s):  
Dong Hua Zhang ◽  
Li Jing Pan ◽  
Da Zhi Sun
Keyword(s):  
Polyvinylidene Fluoride ◽  
Pure Water ◽  
Water Flux ◽  
Composite Membranes ◽  
Rejection Rate ◽  
Inversion Method ◽  
Ultrafiltration Membranes ◽  
Cross Sectional ◽  
Uf Membranes ◽  
Phase Inversion Method

BaBi2Nb2O9/PVDF (polyvinylidene fluoride) composite ultrafiltration (UF)membranes were prepared by alloying BaBi2Nb2O9 (BBN) particles uniformly in the PVDF solution (15% polymer weight) and used a phase-inversion method. This paper studied the effect of the concentration of BBN from 0% to 5% in 0.2Mpa on pure water flux and rejection rate to Bovine serum albumin (BSA). The cross-sectional structures of composite membranes were observed by scanning electron microscopy (SEM). Moreover, XRD results revealed the crystal structure of PVDF. The experimental results showed that the BBN/PVDF composite ultrafiltration membranes were superior in separation performances than the pure PVDF membranes due to the addition of BBN.

Preparation Of Cellulose Acetate Dialysis Membrane Using D–Glucose Monohydrate As Additive

2012 ◽  
Author(s):  
Ani Idris ◽  
Ka Yee Hew ◽  
Mieow Kee Chan
Keyword(s):  
Formic Acid ◽  
Creatinine Clearance ◽  
Cellulose Acetate ◽  
Rejection Rate ◽  
Dissolution Time ◽  
Inversion Method ◽  
Dialysis Membrane ◽  
Sem Images ◽  
Phase Inversion Method ◽  
Bsa Rejection

Dialisis membran yang mengandungi sellulosa asetat (CA) sebagai polimer, asid formik (FA) sebagai pelarut dan glukosa-D monohidrat sebagai bahan tambah telah disediakan melalui proses fasa balikan. Objektif utama bagi penyelidikan ini adalah untuk menyelidik pengaruh bahan tambah glukosa–D terhadap prestasi membran dialisis dari segi pemisahan urea dan kreatinina. Kepekatan glukosa–D diubah daripada 2 hingga 10 wt%. Pemanasan menggunakan ketuhar mikrogelombang yang dapat memendekkan masa pelarutan digunakan untuk melarutkan CA polimer dalam pelarut asid formik. Keputusan menunjukkan bahawa membran yang dihasilkan daripada 20 wt% selulosa asetat, 70 wt% asid formik dan 10 wt% glukosa–D monohidrat memberi prestasi yang terbaik bagi penyingkiran urea and kreatinina sebanyak masing–masimg 49.77% dan 19.54%. Apabila membran yang sama dikaji bagi penahanan BSA, ia memberikan peratus penyingkiran larutan BSA sebanyak 96.78%. Berbanding dengan membran dialisis selulosa asetat komersial, didapati bahawa keputusan adalah memuaskan. Gambar SEM menunjukkan bahawa penambahan glukosa–D monohidrat dalam larutan memberi pembentukan struktur jejari. Kata kunci: Membran dialisis; selulosa asetat; penyingkiran urea; penyingkiran kreatinina; peratus penahanan BSA Dialysis membrane containing cellulose acetate (CA) as polymer, formic acid (FA) as solvent and D–glucose monohydrate as additive was prepared by phase inversion method. The main objective of this study is to investigate the influence of D–glucose monohydrate as an additive on the performance of dialysis membrane in terms of urea and creatinine clearance. The concentration of D–glucose is varied from 2 to 10 wt%. Microwave heating which is capable of reducing dissolution time was used to dissolve the CA polymer in the formic acid solvent. Results revealed that the membrane produced from the 20 wt% cellulose acetate, 70 wt% formic acid and 10 wt% D–glucose monohydrate gives the best performance with urea and creatinine clearance of 49.77% and 19.54% respectively. When testing the same membranes with BSA solutions, it gives a BSA rejection rate as high as 96.78%, which seems to be comparable with the commercial cellulose acetate dialysis membranes. Membrane morphology was observed by using a scanning electron microscopy (SEM). The SEM images illustrated that the increment of D–glucose monohydrate in casting solution tends to promote macrovoid formation. Key words: Dialysis membrane; cellulose acetate; SEM images; urea clearance; creatine clearance; BSA rejection rate

Preparation and Characterization of Antimicrobial PES Ultra-Filtration Membrane Modified with Capsaicin

2011 ◽  
Vol 356-360 ◽  
pp. 2338-2343 ◽  
Author(s):  
Han Min Wang ◽  
Xue Li Gao ◽  
Bao Wei Su ◽  
Cong Jie Gao
Keyword(s):  
Phase Inversion ◽  
Antibacterial Property ◽  
Inversion Method ◽  
Polyethylene Glycol 400 ◽  
Membrane Performance ◽  
Filtration Membrane ◽  
Membrane Flux ◽  
Ultra Filtration ◽  
Phase Inversion Method

The polyethersulfone ultra-filtration membrane was prepared by phase inversion method using polyethersulfone(PES), polyethylene glycol 400(PEG400) and N，N- dimethylamide(DMAC) as materials, and was modified by adding a capsaicin monomer named MBHBA which possess antibacterial property. The effects of MBHBA content on the ultra-filtration membrane performance were discussed. The results showed that the addition of MBHBA monomer effectively increased the membrane flux. And the modified membrane had strong inhibitory activity against Escherichia coli.

scholarly journals Novel Dopamine-Modified Cellulose Acetate Ultrafiltration Membranes with Improved Separation and Antifouling Performances

2021 ◽  
Author(s):  
Xi Ma ◽  
Hanxiang Guo ◽  
Zhaofeng Wang ◽  
Nan Sun ◽  
Pengfei Huo ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Pure Water ◽  
Water Flux ◽  
Rejection Rate ◽  
High Water ◽  
Inversion Method ◽  
Cellulose Derivatives ◽  
Long Term Performance ◽  
Phase Inversion Method ◽  
Term Performance

Abstract Cellulose derivatives are the earliest and most widely used membrane materials due to its many excellent characteristics, especially chemical activity and biodegradability. However, the hydrophobic properties of cellulose acetate (CA) limited its development to some extent. To improve the inherent hydrophobic and antifouling properties of the CA membrane, CA was successfully modified with dopamine (CA-2,3-DA) through selective oxidation and Schiff base reactions in this work, which was confirmed by 1H NMR and FTIR measurements. And then, the CA-2,3-DA membrane with high water permeability and the excellent antifouling property was prepared by the phase inversion method. Compared with the primordial CA membrane, the CA-2,3-DA membrane maintained a higher rejection rate for BSA (92.5%) while greatly increasing the pure water flux (167.3 L/m2h), which could be overcome the trade-off relationship between selectivity and permeability of the traditional CA membrane to a certain extent. According to the three-cycles dynamic ultrafiltration and static protein adsorption experiments, the CA-2,3-DA membrane showed good long-term performance stability and superior antifouling performance, which was supported by the experiment results including filtration resistance, flux decline ratio and flux recovery ratio. It is expected that this approach can greatly expand the high-value utilization of modified natural organic polysaccharides in separation engineering.

scholarly journals OPTIMASI KETEBALAN CETAK PADA PREPARASI MEMBRAN POLYETHERIMIDE (PEI)

2018 ◽  
Vol 1 (2) ◽  
pp. 74
Author(s):  
AR. Sella Auliya
Keyword(s):  
Cross Sections ◽  
Phase Inversion ◽  
Membrane Reactor ◽  
Morphological Analysis ◽  
Inversion Method ◽  
Membrane Phase ◽  
Membrane Flux ◽  
Dead End ◽  
Phase Inversion Method ◽  
Scanning Electron

ABSTRACT This research was conducted to optimize the casting thickness in the preparation of Polyetherimide (PEI) membrane. PEI was performed using an immersion-precipitation-induced phase inversion method with a thickness range from 0.5 to 0.8 mm. The results of morphological analysis and cross-sections performed by using Scanning Electron Microscope (SEM) showed decreased pore size along with decreased casting thickness. The results of purified air permeability analysis using "dead end" membrane reactor showed membrane flux at 55,290.16 - 67,244,79 L / m2.h and modulus of prepared PEI rugs were in the range of 1,443,25 - 1,687,59 N / m2. Thus, PEI membrane casting thickness has resulted in increased mechanical strength and pure air permeability.Keywords: Membrane, Phase Inversion; Polyetherimide; Surface Morphology; Tensile Strength; Pemeability ABSTRAK Penelitian ini dilakukan untuk mengoptimasi ketebalan cetak dalam pembuatan membran Polyetherimide (PEI). Optimasi ketebalan cetak membran PEI dilakukan dengan menggunakan metode inversi fasa terinduksi imersi-presipitasi dengan rentang ketebalan 0,5 – 0,8 mm. Hasil analisa morfologi permukaan dan penampang melintang dilakukan menggunakan Scanning Electron Microscopy (SEM) menunjukkan penurunan ukuran pori seiring dengan penurunan ketebalan cetak. Hasil analisis permeabilitas air murni menggunakan reaktor membran “Dead end” menunjukkan nilai fluks membran pada 55.290,16  – 67.244,79 L/m2.jam dan nilai modulus Young membran PEI yang dipreparasi berada pada rentang 1.443,25 – 1.687,59 N/m2. Dengan demikian, penurunan ketebalan cetak membran PEI telah menghasilkan peningkatan kekuatan mekanik dan permeabilitas air murni. Kata Kunci: Membran; Inversi Fasa; Polyetherimide; Morfologi Permukaan; Kekuatan Mekanik; Pemeabilitas

A graphene oxide facilitated a highly porous and effective antibacterial regenerated cellulose membrane containing stabilized silver nanoparticles

Cellulose ◽  
2014 ◽  
Vol 21 (6) ◽  
pp. 4261-4270 ◽  
Author(s):  
Soon Wei Chook ◽  
Chin Hua Chia ◽  
Sarani Zakaria ◽  
Mohd Khan Ayob ◽  
Nay Ming Huang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Highly Porous

A straight, open and macro-porous fuel electrode-supported protonic ceramic electrochemical cell

2021 ◽  
Author(s):  
Yuxin Pan ◽  
Kai Pei ◽  
Yucun Zhou ◽  
Tong Liu ◽  
Meilin Liu ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Electrochemical Cell ◽  
Inversion Method ◽  
Phase Inversion Method

A straight, open and macro-porous Ni–BaZr0.1Ce0.7Y0.1Yb0.1O3 fuel electrode-supported protonic ceramic electrochemical cell has been fabricated by a modified phase-inversion method.

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