Preparation and characterization of cellulose nanofiltration membrane through hydrolysis followed by carboxymethylation

Weng, Rengui; Chen, Lihui; Xiao, He; Huang, Fang; Lin, Shan; Cao, Shi‐Lin; Huang, Liulian

doi:10.1007/s12221-017-7200-1

Cited by 15 publications

(9 citation statements)

References 33 publications

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“…4 Permeability of pure water measured at 1 bar and retention of PEG 35 kDa values for M1-4 membrane samples prepared from biomass samples B1-4 respectively might be concluded that some amount of lignin has been dissolved and later participated in the formation of the matrix of M1. A peak at 1732 cm -1 is also present and, as reported by Weng et al (2017), might be related to unconjugated C=O groups in lignin, carboxylic ester hemicellulose structures and some hardwood extractives as they have not been specifically removed (Routa et al 2017). A small shoulder peak appears at * 1250 cm -1 , which might result from C-O bonds in xylan and vibrations of syringyl rings in lignin structures (Pandey and Pitman 2003).…”

Section: Performance and Characteristics Of The Membranes Prepared DImentioning

confidence: 81%

Preparation of cellulose-rich membranes from wood: effect of wood pretreatment process on membrane performance

et al. 2020

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In this study cellulose-rich membranes were fabricated from untreated and treated hardwood biomass solutions in 1-ethyl-3-methylimidazolium acetate ([Emim][OAc])—dimetylsulfoxide (DMSO) system via wet phase separation. Wood treatment methods aimed to get purified cellulose fraction of wood. Treatment sequence was as followed: deep eutectic solvent pretreatment, sodium chlorite bleaching, and alkaline treatment. Resulted biomass after each treatment step was characterized by chemical composition and crystalline fraction content. Flat-sheet membranes were produced from biomass samples after each treatment step. Characterization of membranes included measurements of pure water permeability and (poly)ethyleneglycol 35 kDa retention, Fourier-transform infrared and Raman spectroscopy, X-ray diffraction measurements and thermogravimetric analysis. The study revealed that it was possible to fabricate membrane from untreated wood as well as from wood biomass after each of treatment steps. The resulted membranes differed in chemical composition and filtration performance. Membrane prepared directly from untreated wood had the highest permeability, the lowest retention; and the most complex chemical composition among others. As treatment steps removed lignin and hemicelluloses from the wood biomass, the corresponding membranes became chemically more homogeneous and showed increased retention and decreased permeability values.

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Section: Performance and Characteristics Of The Membranes Prepared DImentioning

confidence: 81%

Preparation of cellulose-rich membranes from wood: effect of wood pretreatment process on membrane performance

et al. 2020

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“…These antifouling agents improve the surface morphology, charge and hydrophilicity of the membrane, enhancing productivity and life span. For instance, Li et al reported the fabrication of permeable and antifouling UF membranes using bacterial cellulose with mussel-inspired dopamine and graphene oxide [ 106 ]. Graphene-oxide nanosheet functionalized phosphorylated chitosan (PCS) NF membranes also exhibited high flux, separation efficiency and antifouling performance [ 107 ].…”

Section: Biopolymer-based Dye Removal Technologiesmentioning

confidence: 99%

Recent Advances in Biopolymer-Based Dye Removal Technologies

2021

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Synthetic dyes have become an integral part of many industries such as textiles, tannin and even food and pharmaceuticals. Industrial dye effluents from various dye utilizing industries are considered harmful to the environment and human health due to their intense color, toxicity and carcinogenic nature. To mitigate environmental and public health related issues, different techniques of dye remediation have been widely investigated. However, efficient and cost-effective methods of dye removal have not been fully established yet. This paper highlights and presents a review of recent literature on the utilization of the most widely available biopolymers, specifically, cellulose, chitin and chitosan-based products for dye removal. The focus has been limited to the three most widely explored technologies: adsorption, advanced oxidation processes and membrane filtration. Due to their high efficiency in dye removal coupled with environmental benignity, scalability, low cost and non-toxicity, biopolymer-based dye removal technologies have the potential to become sustainable alternatives for the remediation of industrial dye effluents as well as contaminated water bodies.

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“…The thermal stability after membrane formation was lower than before membrane formation, which may be due to the dissolution regeneration process. The hydrogen bond between the cellulose was not completely rebuilt after it was opened, and the decrease in crystallinity after dissolution also affects the thermal stability of the MCC membrane (Weng et al 2017) In uence of the content of MCC on the mechanical properties Figure 7 shown the in uence of the content of microcrystalline cellulose in the casting solution on the mechanical properties of the microcrystalline cellulose membrane. It can be seen that with the increase of the content of MCC in the casting solution, the tensile strength and elongation at break of the MCC membrane both show an increasing trend.…”

Section: Thermal Analysismentioning

confidence: 99%

Preparation of microcrystalline cellulose from Rabdosia rubescens and study on its membrane properties

Wei

Shi

et al. 2021

Preprint

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Microcrystalline cellulose (MCC) from Rabdosia rubescens was prepared by acid hydrolysis, and the corresponding yield of MCC was about 94% when the hydrochloric acid concentration was 10%, the acid hydrolysis time was 70min and the acid hydrolysis temperature was 70℃. The MCC was dissolved in N-methylmorpholine-N-oxide(NMMO)by phase transformation method to prepare MCC membrane. The structure and mechanical properties of MCC membrane were studied systemically. The results showed that the cellulose structure changed from type I to type II in the process of membrane formation, and the thermal stability also decreased. The content of MCC in the casting solution has a great influence on the mechanical properties of the membranes. The higher the content of MCC, the better the comprehensive mechanical properties of the membranes. When the MCC content is 9%, the tensile strength is 8.38 MPa and the elongation at break is 26.72%. Finally, the separation properties of membrane studed by separation bovine serum albumin (BSA) from water. The results showed that the rejection rate and water flux changed positively and negatively with the change of MCC content. When the content was 5%, MCC membrane showed the best comprehensive performance, its rejection of BSA was 37.23 g/(m2·h), and the corresponding rejection rate and water flux were 88.87% and 41.89 L/(m2·h) respectively.

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Preparation and characterization of cellulose nanofiltration membrane through hydrolysis followed by carboxymethylation

Cited by 15 publications

References 33 publications

Preparation of cellulose-rich membranes from wood: effect of wood pretreatment process on membrane performance

Preparation of cellulose-rich membranes from wood: effect of wood pretreatment process on membrane performance

Recent Advances in Biopolymer-Based Dye Removal Technologies

Preparation of microcrystalline cellulose from Rabdosia rubescens and study on its membrane properties

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