نتایج جستجو برای: polymeric membranes

تعداد نتایج: 116258  

2016
Jiaolong Wang Lina Wang Ziyu Zhou Hanjian Lai Pan Xu Lan Liao Junchao Wei Jianxun Ding

Polymer membranes have been widely used in guided tissue regeneration (GTR) and guided bone regeneration (GBR). In this review, various commercially available membranes are described. Much attention is paid to the recent development of biodegradable polymers applied in GTR and GBR, and the important issues of biodegradable polymeric membranes, including their classification, latest experimental...

2014
Gongping Liu Wang Wei Wanqin Jin

Because of the emerging scarcity of oil resources and the demand for environmental protection, as a typical biofuel, biobutanol produced by biomass fermentation is critical for the development of renewable energy. Pervaporation is considered to be an attractive separation technology for both the recovery of butanol from fermentation broth and the dehydration of butanol from low-water content so...

2013
Muhammad Sahimi Larry Rahn

In this project, we study SiC nanoporous membranes, which exhibit the potential to overcome many of the difficulties other inorganic membranes face, particularly under conditions typically encountered in reactive separations for H2 production, and in fuel-cell applications. In particular, we systematically investigate and further develop the technique of pre-ceramic polymer pyrolysis to produce...

2008

The present invention provides wood derivatives and composite materials prepared by first solvating a lignocellulosic material using an ionic liquid. The solvated lignocellulosic material can be derivatized to incorporate functional groups, particularly groups that facilitate later combination with polymer materials, including non-polymer polymers. The polymeric materials can be combined with t...

Journal: :Frontiers of Environmental Science & Engineering 2021

Abstract Bioinspired and biomimetic membranes that contain biological transport channels or attain their structural designs from systems have been through a remarkable development over the last two decades. They take advantage of exceptional properties those channels, thus possess both high permeability selectivity, emerged as promising solution to existing membranes. Since discovery water chan...

2016
Gertjan Vancoillie Richard Hoogenboom

Boronic acid-containing (co)polymers have fascinated researchers for decades, garnering attention for their unique responsiveness toward 1,2- and 1,3-diols, including saccharides and nucleotides. The applications of materials that exert this property are manifold including sensing, but also self-regulated drug delivery systems through responsive membranes or micelles. In this review, some of th...

Journal: : 2022

Dyes are an essential group of organic pollutants with a long history harming aquatic life and humans. Prior to disposal, polluted dye wastewater must be adequately treated prevent adverse impacts on persons the environment. Although there several techniques for removal, most them share similar drawback: they generate secondary pollution Membrane separation is highlighted in this article becaus...

Journal: :Accounts of chemical research 2013
Minghui Wang Vaclav Janout Steven L Regen

The use of organic polymeric membranes to separate gaseous mixtures provides an attractive alternative to other methods such as selective adsorption and cryogenic distillation. The primary advantages of membrane-based separations are their relative energy efficiency and lower costs. Because the flux of a gas across a membrane is inversely proportional to the membrane's thickness, this method re...

2011
Muhammad Sahimi Theodore T. Tsotsis

Silicon carbide (SiC) is a promising material for the preparation of high temperature membranes [1-5] due to its many unique properties such as high thermochemical stability, high thermal conductivity and resistance to abrasion. In our studies, SiC microporous membranes are fabricated using two different techniques. The first approach involves the pyrolysis of pre-ceramic polymeric films [3,4],...

A. Akbari M. Homayoonfal

UV-induced grafting technique was used as a flexible method for surface modification of Polysulfone (PSf) ultrafiltration (UF) membranes in order to prepare hydrophilic nanofiltration (NF) membranes. Flat sheet Polysulfone (PSf) ultrafiltration membranes were prepared via phase inversion method. N-methylene-2-pyrrolidone (NMP) and polyethylene glycol (PEG) of three different molecular weights (...

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