聚丙烯酸钠水凝胶颗粒对超声场声强的衰减规律  

Attenuation Law of Ultrasonic Field Sound Intensity by Sodium Polyacrylate Hydrogel Particles

作　　者：王丹彤 薛凯茹 张园园 杨欣 琚成功 吴燕 WANG Dan-tong;XUE Kai-ru;ZHANG Yuan-yuan;YANG Xin;JU Cheng-gong;WU Yan(College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457

出　　处：《科学技术与工程》2023年第11期4514-4518,共5页Science Technology and Engineering

基　　金：国家自然科学基金(21806122)。

摘　　要：为提高超声波在水凝胶环境中应用的准确性,借助自行搭建的超声场实验平台,研究了聚丙烯酸钠干凝胶颗粒溶胀过程、堆积状态,以及超声场作用下水凝胶颗粒状态变化对超声场声强的衰减规律。结果表明:干凝胶颗粒吸水溶胀150 s时,声强基本稳定,稳定时声衰幅度达55.00%。不同堆积状态的干凝胶颗粒溶胀对声强衰减的影响规律一致:声衰幅度先增大后稳定,颗粒堆积密度越大,则稳定时声衰幅度越小。超声场作用下,随水凝胶颗粒逐渐吸水饱和,其造成的声衰幅度逐渐减小,最终稳定在7.97%。In order to improve the accuracy of ultrasonic application in hydrogel environment,the influence of sodium polyacrylate xerogel particles in the swelling process and of the different packing state on ultrasonic field was studied by using a self-built ultrasonic field experimental platform.Besides,the effect of hydrogel particle of different state under ultrasonic field on sound intensity attenuation was also investigated.The results show that when the xerogel particles swelled by water for 150 s,the sound intensity is almost stable,with the sound attenuation amplitude reaching 55.00%.The influence of swelling of xerogel particles in different packing states on sound intensity attenuation is consistent:the sound attenuation amplitude increases first and then reaches a plateau.And the larger the packing density of particles is,the smaller the sound attenuation amplitude is at the stable state.Under ultrasonic field,as the hydrogel particles gradually saturated with water,the resulting amplitude of sound attenuation gradually decreases and finally stabilizes at 7.97%.

关 键 词：水凝胶颗粒 溶胀过程 超声场 声衰幅度 

分 类 号：O631[理学—高分子化学]