新型羧甲基纤维素钠/羧基丁腈胶乳复合气凝胶的吸声特性研究

Study on the Sound Absorption Characteristics of a Novel Composite Aerogel with Sodium Carboxymethyl Cellulose and Carboxybutylonitrile Latex

以羧甲基纤维素钠(CMC)为基体材料,以羧基丁腈胶乳(XNBRL)为黏合剂、稳定剂,利用冷冻干燥工艺制备复合气凝胶材料,通过改变羧基丁腈胶乳在复合气凝胶中的含量,研究其对复合气凝胶耐热性、机械性能以及吸声性能的影响。结果表明,随着羧基丁腈胶乳的加入,复合气凝胶的耐热性能、结构强度均有提升,且羧甲基纤维素钠与羧基丁腈胶乳含量比为7∶3时具有最佳的吸声性能。

With sodium carboxymethyl cellulose(CMC)as the matrix material and carboxybutylonitrile latex(XNBRL)as adhesive and stabilizer,composite aerogel material is prepared through a freeze-drying process.The effect of varied content of XNBRL in the composite aerogel on the heat resistance,mechanical properties and sound absorption performance of the composite aerogel was studied.Results show that with the addition of XNBRL,heat resistance and structural strength of the composite aerogel are improved,and its sound absorption performance is the best when the ratio of CMC to XNBRL is 7∶3.