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首页> 外文期刊>Separation and Purification Technology >Poly(3-hydroxybutyrate)-functionalised multi-walled carbon nanotubes/chitosan green nanocomposite membranes and their application in pervaporation
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Poly(3-hydroxybutyrate)-functionalised multi-walled carbon nanotubes/chitosan green nanocomposite membranes and their application in pervaporation

机译：聚（3-羟基丁酸酯）功能化的多壁碳纳米管/壳聚糖绿色纳米复合膜及其在全蒸发中的应用

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摘要

The aim of this research was to align poly(3-hydroxybutyrate) (PHB)-functionalised multi-walled carbon nanotubes (MWCNTs) into a chitosan matrix. The MWCNTs were first functionalised with PHB and aligned into a membrane filter template through a filtration process. A solution casting technique was then applied to cast the chitosan onto the template to form PHB-MWCNT/chitosan nanocomposite membranes. The functionalised MWCNTs and resulting membranes were characterised using thermo-gravimetric analysis (TGA), Fourier transform infrared spectroscopy (ETIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The TGA demonstrated that approximately 40 wt.% of the PHB was successfully functionalised in the MWCNTs, and TEM showed that the polymer wrapped on the nanotubes surface. The presence of the PHB functional moieties helped to improve the dispersion and compatibility of the MWCNTs in the chitosan matrix. When we applied the PHB-MWCNT/chitosan nanocomposite membranes in the pervaporation process of 1,4-dioxane dehydration, the nanocomposite membrane showed a relatively high permeation flux and selectivity towards water, compared to existing membrane.
机译：这项研究的目的是将聚（3-羟基丁酸酯）（PHB）功能化的多壁碳纳米管（MWCNT）排列成壳聚糖基质。首先用PHB对MWCNT进行功能化，并通过过滤过程将其对准成膜过滤器模板。然后应用溶液流延技术将壳聚糖流延到模板上以形成PHB-MWCNT /壳聚糖纳米复合膜。使用热重分析（TGA），傅立叶变换红外光谱（ETIR），扫描电子显微镜（SEM）和透射电子显微镜（TEM）对功能化的MWCNT和所得膜进行表征。 TGA表明，在MWCNT中成功地官能化了约40wt。％的PHB，并且TEM表明聚合物包裹在纳米管表面上。 PHB功能部分的存在有助于改善MWCNT在壳聚糖基质中的分散性和相容性。当我们将PHB-MWCNT /壳聚糖纳米复合膜应用于1,4-二恶烷脱水的全蒸发过程中时，与现有膜相比，该纳米复合膜表现出相对较高的渗透通量和对水的选择性。

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