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间苯二酚甲醛与Ni(OH)_2复合气凝胶结构特性研究
作者:李悦 陈艾 吴孟强 陆海鹏 
单位:西南电子设备研究所微波集成中心 电子科技大学微电子与固体电子学院 电子科技大学微电子与固体电子学院 西南电子设备研究所微波集成中心 成都 610036电子科技大学微电子与固体电子学院 成都 610054  成都 610054  成都 610054  成都 610036 
关键词:复合气凝胶  溶胶凝胶  超临界干燥  小角X射线散射  分形结构 
分类号:O648
出版年,卷(期):页码:2004,32(6):714-717
DOI:
摘要:
以间苯二酚、甲醛、碳酸氢钠、硝酸镍为原料,采用溶胶凝胶法和超临界干燥工艺制得间苯二酚甲醛与Ni(OH)2复合气凝胶,对不同pH值和Ni(OH)2含量的复合气凝胶结构进行研究。通过小角X射线散射实验测量气凝胶的散射强度,分析了复合气凝胶平均粒径、比表面积和分形行为等特性。结果表明:酸性条件比碱性条件下制成的复合气凝胶粒径小,团聚现象不明显;且随着复合气凝胶中Ni(OH)2的质量分数增加,其结构复杂度增加,胶体平均粒径和比表面积均增大。
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The resorcinolformaldehyde (RF) and nickel hydroxide compound aerogels were synthesized by solgel process and supercritical drying technique using resorcinol, formaldehyde, nickel nitrate and anhydrous sodium carbonate as raw materials. The structure and characteristics of composite aerogels with different pH value and Ni(OH)_(2) content were studied. The scattering intensity was measured by small angle X-ray scattering test. The pore diameters, specific surfaces and fractal behaviors of samples were analyzed. The results show that the particle size of composite aerogels prepared in acidic conditions is smaller than that in alkaline conditions, but the particle size and the specific surface area of composite aerogels become bigger with the increase of the mass fraction of Ni(OH)_(2)content.
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基金项目:
科工委基金(2002JKA5023);; 国家自然科学基金(50082001)资助项目。
作者简介:
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参考文献:
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