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首页> 外文期刊>Applied Surface Science >Organosilane modified silica/polydimethylsiloxane mixed matrix membranes for enhanced propyleneitrogen separation
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Organosilane modified silica/polydimethylsiloxane mixed matrix membranes for enhanced propyleneitrogen separation

机译：有机硅烷改性的二氧化硅/聚二甲基硅氧烷混合基质膜，用于增强丙烯/氮气分离

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摘要

Gas transport behaviors of oxygen (O_2), nitrogen (N_2) and propylene (C_3H_6) in polydimethylsiloxane (PDMS) mixed matrix membranes (MMM) containing modified silica (SiO_2) nanoparticles are presented. Two surface modified SiO_2 nanoparticles, silica dimethyloctyl silane (Si-DMOS) and silica dimethylphenyl silane (Si-DMPS), were used as fillers. Surface modification was carried out through silanization, which was confirmed via Fourier transform infrared spectroscopy. From elemental analysis, degrees of modifications on Si-DMOS and Si-DMPS were estimated to be 29.64% and 79.89%, respectively. Field emission scanning electron microscopy showed uniform distribution of the modified SiO_2 fillers in MMMs. Both MMMs exhibited reduced O_2 and N_2 permeabilities as compared to pure PDMS, while enhanced C_3H_6 permeabilities were observed. Consequently, C_3H_6/N_2 permselectivities were increased by 35 and 44% in MMMs filled with Si-DMOS and Si-DMPS, respectively. Results revealed that permeability was dependent on penetrant diffusivities, a parameter related to the structure of MMMs. Density measurements and differential scanning calorimetry were performed to elucidate the changes in MMM properties which affected the permeation behaviors of O_2, N_2 and C_3H_6. Overall, both Si-DMOS and Si-DMPS show potential as fillers for the enhancement of PDMS permeation performance.
机译：提出了氧（O_2），氮（N_2）和丙烯（C_3H_6）在含改性二氧化硅（SiO_2）纳米粒子的聚二甲基硅氧烷（PDMS）混合基质膜（MMM）中的气体迁移行为。两种表面改性的SiO_2纳米颗粒，二氧化硅二甲基辛基硅烷（Si-DMOS）和二氧化硅二甲基苯基硅烷（Si-DMPS），用作填充剂。表面改性通过硅烷化进行，这通过傅立叶变换红外光谱法得到证实。根据元素分析，Si-DMOS和Si-DMPS的修饰度分别为29.64％和79.89％。场发射扫描电子显微镜显示改性的SiO_2填料在MMM中的均匀分布。与纯PDMS相比，两种MMM均表现出降低的O_2和N_2渗透率，而观察到增强的C_3H_6渗透率。因此，在填充有Si-DMOS和Si-DMPS的MMM中，C_3H_6 / N_2的渗透率分别增加了35％和44％。结果表明，渗透率取决于渗透率，渗透率与MMM的结构有关。进行密度测量和差示扫描量热法以阐明影响O_2，N_2和C_3H_6的渗透行为的MMM性质的变化。总体而言，Si-DMOS和Si-DMPS都显示出了增强PDMS渗透性能的潜力。

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  • 来源
    《Applied Surface Science》 |2011年第1期|p.337-345|共9页
  • 作者

    Arnel B. Beltran; Grace M. Nisola; EulsaengCho; Erli ErosD.Lee; Wook-JinChung;

  • 作者单位

    Energy and Environment Fusion Technology Center (E2FTC), Department of Environmental Engineering and Biotechnology, Myongji University, Yongin City, Gyeonggi Province 449-728, South Korea;

    Energy and Environment Fusion Technology Center (E2FTC), Department of Environmental Engineering and Biotechnology, Myongji University, Yongin City, Gyeonggi Province 449-728, South Korea;

    Korea Environment Institute, Division of Water and Environmental Strategy Research Croup: 290Jinheungno, Eunpyeong-Cu, Seoul, 122-706, South Korea;

    Energy and Environment Fusion Technology Center (E2FTC), Department of Environmental Engineering and Biotechnology, Myongji University, Yongin City, Gyeonggi Province 449-728, South Korea;

    Energy and Environment Fusion Technology Center (E2FTC), Department of Environmental Engineering and Biotechnology, Myongji University, Yongin City, Gyeonggi Province 449-728, South Korea;

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  • 正文语种 eng
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  • 关键词

    silica nanoparticle; surface modification; silanization; mixed matrix membrane; gas separation; propylene;

    机译：二氧化硅纳米粒子表面改性;硅烷化混合基质膜气体分离丙烯;

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