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Gas Separation Properties of New Nanocomposite Polyurethane / Alumina Nanocomposite Films: Application in Methane and Nitrogen Separation

Authors： Qizhao Li

Units： School of Pharmacy, Anhui Xinhua University, Anhui Hefei, 230088, China

KeyWords： bauxite, polyurethane, nanocomposite film, gas separation

ClassificationCode：TB383.2

year,volume(issue):pagination： 2020,40(6):79-87

Abstract：

In this paper, the effect of alumina hydroxide (γ - AlO (OH)) nanoparticles on the gas permeability of polyether polyurethane membrane was studied. Aluminum nitrate (Al (NO3) 3) and DEA were used as precipitants. The thin bauxite was synthesized by hydrothermal mechanism and combined with polyurethane matrix. The optimum temperature and time of nanoparticle preparation were 200°c and 24 h, respectively. Polyurethane (PU) and polyurethane / boehmite films were prepared by thermal phase transformation. XRD, FTIR, SEM and DSC were used to characterize the uniformity and nano distribution of the polyurethane - boehmite films.The results of FTIR showed that the mobility of the chain was controlled, and the phase separation of the soft segment and the hard segment was improved. The gas permeability of nanocomposite films with different bauxite concentrations (5%,10%,15%, and 20 wt.%) to pure CO2, N2, O2, and CH4 gases was investigated. The experimental results show that the permeability of the membrane can be significantly reduced by adding impermeable thin bauxite nanoparticles to the polyurethane-buhemite film. However, the selectivity to CO2/N2 and CO2/CH4 mixtures increased by 36.5% and 46.85%, respectively, due to the increased content of bauxite in thin water.

Funds：

安徽教育厅自然科学研究项目，项目编号：KJ2017A627 安徽省级质量工程项目，项目编号：2016sxzx021

AuthorIntro：

李启照（1970.10-），男，汉，安徽金寨人，硕士，副教授，主要研究领域为制药工程

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