囊泡模板法制备纳米/微米级酚醛树脂中空球

以十六烷基三甲基溴化铵(CTAB)和十二烷基硫酸钠(SDS)分子自组装形成的囊泡为模板, 用氨水溶液提供缓冲环境, 甲阶酚醛树脂为前驱体, 控制表面活性剂配比, 反应温度和时间不变, 通过改变搅拌速率得到纳米/微米级酚醛树脂多层中空球, 并利用X射线衍射仪（XRD）、 透射电子显微镜（TEM）、 扫描电子显微镜（SEM）、 比表面积和孔隙分析仪、 热重分析仪（TGA）对所得微球进行表征. 结果表明： 酚醛树脂中空纳米球的粒径为50~60 nm, 球壳厚度约为10 nm； 酚醛树脂中空微米球分为单室和多室两种形貌, 单室中空球粒径为2~5 μm, 多室中空球粒径可达10 μm, 球壳厚度约为500 nm; 两种形貌的酚醛树脂中空球的球壳均为多层周期结构.

Preparation of Phenolic Resin Hollow Nano/Micron Spheres by Vesicle Template Method

The nano/micron phenolic resin multi layer hollow spheres were obtained by using self assembled vesicles consisting of cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) as templates, the water soluble phenolic resin was the precursor, and the buffer environment was provided with the aqueous ammonia solution. The surfactant ratio, reaction temperature and time were controlled, and the stirring rate was changed. The samples were characterized by X-ray  diffractometry (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen adsorption desorption analyzer, and thermogravimetric analyzer (TGA). The results show that the particle size of the phenolic resin hollow nanosphere is 50—60 nm. The thickness of the shell is about 10 nm.The morphology of phenolic resin hollow microspheres are divided into single chamber and multi chamber. The particle size of the single chamber hollow microsphere is 2—5 μm, and the particle size of the multi chamber microhollow sphere can reach 10 μm. The thickness of the shell is about 500 nm. The spherical shells of two kinds of the phenolic resin hollow spheres have a multi layer periodic structure.