废纸浆气凝胶的制备及性能研究

Study on preparation and property of waste paper pulp aerogel

以废弃瓦楞纸纸浆为原料,溴化锂溶液为溶剂,通过溶解再生法和冷冻干燥法制备了废纸浆气凝胶,并进一步利用甲基三氯硅烷(MTS)对气凝胶进行疏水改性。采用扫描电子显微镜、全自动比表面及孔隙度分析仪、傅里叶变换红外光谱仪(FT-IR)、X射线衍射仪和接触角测量仪等手段对气凝胶进行表征。结果表明:气凝胶材料具有良好的成形和吸附能力,呈相互交联的三维网络多孔结构,比表面积为61.31m^2/g,孔体积为0.22cm^3/g,平均孔径为15.58nm。FT-IR分析表明MTS成功改性了气凝胶,气凝胶疏水吸油性能测试表明疏水性气凝胶由亲水型变成疏水型,接触角约为136°,对油类和有机试剂具有较好的吸附能力。

Using waste corrugated paper pulp as raw material and lithium bromide solution as solvent,waste paper pulp aerogels were prepared by dissolution and regeneration method and freeze-drying method,and then hydrophobic modified by methyl trichlorosilane(MTS).The aerogel was characterized by scanning electron microscope(SEM),automatic specific surface and porosity analyzer,fourier transform infrared spectrometer(FT-IR),X-ray diffraction(XRD)and contact Angle measuring instrument.The results showed that the aerogels had good forming and adsorption capacity,and the crosslinked three-dimensional network porous structure with the specific surface area of 61.31m2/g,pore volume of 0.22cm3/g,and average pore diameter of 15.58nm.FT-IR analysis showed that MTS successfully modified the aerogel,aerogel hydrophobic oil absorption performance tests showed that hydrophobic aerogel from hydrophilic to hydrophobic,the contact angle was 136°,and had good adsorption ability to oil and organic reagent.