均苯三酚改性三聚氰胺-甲醛气凝胶的制备与表征

以三聚氰胺、均苯三酚和甲醛为原料，经过溶胶凝胶、CO2超临界干燥，制备出由均苯三酚改性的最低密度为44 mg/cm3、透明、不易开裂的三聚氰胺-甲醛（MF）气凝胶，利用Materials-Studio软件模拟，结果证明了均苯三酚的引入可以缩短凝胶时间。并采用扫描电镜（SEM）, 红外（FT-IR）, 热重（TGA）对样品进行了表征，测试表明:改性后的MF气凝胶具有由直径30 nm的骨架构成三位连续空间网络结构，孔径约为100 nm，且分布均匀，热性能也有所提高。

Preparation and characterization of melamine-formaldehyde aerogel modified by phloroglucinol

Melamine-formaldehyde(MF) aerogels modified by phloroglucinol were prepared using melamine, phloroglucinol and formaldehyde by means of sol-gel and CO2 supercritical drying process. The lowest density of the modified MF aerogels is about 44 mg/cm3. The aerogel samples are transparent and unbroken.It is proved that shortening gelation time is caused by phloroglucinol through the Materials-Studio computer simulation. The samples were also characterized by SEM, FT-IR and TGA. These tests show that: the modified aerogels have the three dimensional space network structure, with uniform pore size distribution and thermostability.