纳米纤维素复合气凝胶的制备与性能研究

Research on the Preparation and Properties of Nanocellulose Composite Aerogels

针对当前纤维素气凝胶性能研究的不足,开展了纳米纤维素气凝胶的常规制备、复合改性,油脂吸附、吸声性能、力学性能、疏水性能、孔径分布等实验。结果表明:常规纤维素气凝胶超亲水,通过复合改性可具有超疏水性;油脂吸附能力突出,可达自身重量的30倍以上,且可以循环使用;在较宽的频率范围内吸声系数都高于0.6,最高接近0.9,优于市售常规吸声材料;采用BET、FTIR分析方法探索了纳米纤维素气凝胶性能优越的机理。纳米纤维素气凝胶适用于吸附、空气净化、建筑等多领域。

In order to further improve nanocellulose aerogel applications,we have investigated the preparation,composite modification,oil adsorption,sound absorption,mechanical engineering,hydrophobic analysis,and pore size distribution tests of nanocellulose aerogels.Cellulose aerogel is able to be superhydrophobic by composite modification even though it is super-hydrophilic normally.Its oil adsorption capacity is outstanding-adsorbing more than 30 times of its weight,as well as recycling.The sound absorption coefficient is over 0.6 in a wide frequency range with the highest number of 0.9,which is superior to the commercially conventional sound absorbing materials.The mechanism of superior performance was explored by BET,FTIR,and TG analysis.Nanocellulose aerogels are suitable for many fields,including adsorption,air purification,and construction.