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首页> 外文期刊>Journal of Materials Science >Impact of synthesis conditions on meso- and macropore structures of resorcinol–formaldehyde xerogels
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Impact of synthesis conditions on meso- and macropore structures of resorcinol–formaldehyde xerogels

机译：合成条件对间苯二酚-甲醛干凝胶的中孔和大孔结构的影响

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摘要

Xerogels were prepared by the sol–gel polymerization of resorcinol with formaldehyde at different conditions. The effects of different synthesis factors (namely, resorcinol-to-formaldehyde ratio, resorcinol-to-water ratio, resorcinol-to-catalyst ratio, and initial solution pH) on the surface areas, pore volumes, pore size distributions, and adsorption capacity of liquid nitrogen were studied. Factorial design was also used to investigate the relative significance of these factors on the resulting xerogels properties, and the possible interactions between them. The mean effects of the most significant factors and factor interactions on determining the pore structures and adsorption capacities were evaluated. The synthesized xerogels were characterized by Fourier transmission infrared spectroscopy, thermal gravimetric analysis, scanning electron microscopy, and surface area analyzer. The results showed that surface areas, pore size distributions, and nitrogen adsorption capacity are dependent completely on the recipes used to prepare the xerogels. Pore structure results put xerogel samples as candidates for adsorption technology, ultra-filtration, and nano-filtration fields based on pore sizes and pore volume scales.
机译：通过在不同条件下间苯二酚与甲醛的溶胶-凝胶聚合反应制备干凝胶。不同合成因子（即间苯二酚与甲醛之比，间苯二酚与水之比，间苯二酚与催化剂之比和初始溶液pH）对表面积，孔体积，孔径分布和吸附容量的影响研究了液氮的含量。析因设计还用于研究这些因素对所得干凝胶性质的相对重要性，以及它们之间可能的相互作用。评价了最重要因素和因素相互作用对确定孔结构和吸附能力的平均影响。合成的干凝胶通过傅里叶透射红外光谱，热重分析，扫描电子显微镜和表面积分析仪进行表征。结果表明，表面积，孔径分布和氮吸附能力完全取决于用于制备干凝胶的配方。孔结构结果使干凝胶样品成为基于孔径和孔体积尺度的吸附技术，超滤和纳米过滤领域的候选者。

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  • 来源
    《Journal of Materials Science》 |2011年第24期|p.7760-7769|共10页
  • 作者

    Ahmed Awadallah-F; Ahmed M. Elkhatat; Shaheen A. Al-Muhtaseb;

  • 作者单位

    Department of Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar;

    Department of Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar;

    Department of Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar;

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