摘要
通过分析间/对苯二酚-甲醛复合气凝胶反应体系的紫外吸收光谱,推断了该体系的反应历程应该是:间苯二酚与甲醛发生加成反应生成羟甲基化合物,而对苯二酚不参与跟甲醛的加成反应,但是,间苯二酚和对苯二酚的酚环上未被取代的活泼氢共同参与跟羟甲基之间的缩聚反应,参与凝胶核的形成,凝胶核继续生长并相互交联形成纳米网络结构。为进一步增强该推论的可靠性,研究了反应体系的红外光谱(FTIR)和透射电镜(TEM)图像。
After analyzing the UV-spectra of RHF composite organic aerogels, the course of the reaction in the mixed solution with resorcine, hydroquinone and formaldehyde is concluded to be that hydroquinone and formaldehyde can not react to give birth to hydroxylmethylene on the used condision but resorcin and formaldehyde can do. Conden- sation reaction exists on hydroxylmethylenes and the remainder active hydrogen of the hydroxybenzene phenyl. And dusters form because the bigger particulates go on to grow up,and then clusters are coupled to come into being a nanonetlike framework. At the same time, the infrared spectra and TEM picture of reaction system are used to prove the conclusion credible.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2006年第5期142-144,共3页
Materials Reports
基金
国家高技术863
国家自然科学基金(10475069/A0506155)
关键词
紫外光谱
红外光谱
复合气凝胶
UV spectrum, infrared spectrum, composite aerogel
