γ射线对聚丙烯发泡材料亲油疏水性能的影响  

γ-ray effects on lipophilic and hydrophobic properties of polypropylene foaming materials

作　　者：蔡佩君 文鑫 王小俊 严坤 杨晨光 CAI Peijun;WEN Xin;WANG Xiaojun;YAN Kun;YANG Chenguang(Hubei Key Laboratory of Advanced Textile Materials&Application,College of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]湖北省纺织新材料与应用重点实验室,武汉纺织大学材料科学与工程学院,武汉430200

出　　处：《辐射研究与辐射工艺学报》2021年第3期9-15,共7页Journal of Radiation Research and Radiation Processing

基　　金：武汉纺织大学科技创新项目(193143,205009)资助。

摘　　要：系统研究了γ射线辐照对两种聚丙烯(PP)泡沫材料亲油疏水性能的影响规律。等规聚丙烯(iPP)和高熔体强度聚丙烯(HMSPP)颗粒分别经热压制备成厚度为1 mm的片材,然后通过超临界CO_(2)釜压发泡制备PP泡沫材料,利用γ射线对发泡样品进行辐照处理。结果表明:辐照后,两种泡沫的熔点和结晶温度均下降,泡孔孔壁出现裂纹,泡沫断面粗糙度明显增加,出现亲水性缺陷,泡沫断面的抗液滴黏着性增加;iPP泡沫水接触角增加26.4%,HMSPP泡沫接触角从135.2°增长至141.8°,几乎达到超疏水水平;泡孔孔壁裂纹的出现,增加了泡孔之间的连通性,泡沫吸油渗透率变大,吸油量明显增加。这为制备亲油疏水泡沫材料提供了方法。The effects of γ-ray irradiation on the lipophilic and hydrophobic properties of two types of polypropylene(PP)foam materials were systematically studied.Isotactic polypropylene(iPP)and high-meltstrength polypropylene(HMSPP)sheets were prepared by hot pressing with a thickness of 1 mm,and then PP foams were prepared by supercritical CO_(2) batch foaming.Finally,the foamed samples were irradiated with γ-rays.The results showed that the melting points and crystallization temperatures of the two foams decreased after irradiation.The scanning electron microscope images showed that the cell walls of both PP foams appeared cracks and the roughness of the foam’s cross-section increased significantly.The water contact angle of iPP foam largely increased by 26.4%,and the contact angle of HMSPP foam increased from 135.2°to 141.8°,which almost reached the superhydrophobic level.The enhanced roughness increased the hydrophilic defects and the droplet adhesion resistance.Moreover,the appearance of the cracks in the cell walls increased the connectivity between cells,which largely increased the foam oil absorption permeability and the oil absorption quantity.This study provides a method for preparing lipophilic and hydrophobic foam.

关 键 词：Γ射线辐照 PP泡沫 超临界CO_(2)发泡 疏水性 吸油性能 

分 类 号：TL13[核科学技术—核能科学]