超临界二氧化碳釜压发泡法制备生物可降解PBAT发泡颗粒  

Preparation of biodegradable PBAT foaming particles by supercritical carbon dioxide autoclave foaming technology

作　　者：冀峰 龚炜华 张艳 罗水源 于庆雨 朱君秋 郭江彬 JI Feng;GONG Weihua;ZHANG Yan;LUO Shuiyuan;YU Qingyu;ZHU Junqiu;GUO Jiangbin(Fujian Engineering and Research Center of Green and Environment-Friendly Functional Footwear Materials,College of Chemical Engineering and Materials,Quanzhou Normal University,Quanzhou 362000,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]泉州师范学院化工与材料学院,福建省绿色环保功能鞋材工程研究中心,福建泉州362000 [2]天津大学化工学院,天津300350

出　　处：《中国塑料》2022年第5期122-126,共5页China Plastics

基　　金：福建省重大科技计划资助项目(2020HZ06019);福建省中青年教师教育科研项目(JAT190517);2021年泉州市揭榜挂帅项目(2021GZ3)。

摘　　要：通过超临界二氧化碳釜压发泡技术制备了生物可降解聚对苯二甲酸丁二醇酯-co-聚己二酸丁二醇酯(PBAT)发泡颗粒,采用核磁共振光谱仪(^(1)H-NMR)、凝胶渗透色谱仪(GPC)、差示扫描量热仪(DSC)对PBAT的化学组分及热性能进行了表征,并研究了渗透条件对PBAT发泡性能的影响。结果表明,PBAT中己二酸丁二醇(BA)和对苯二甲酸丁二醇(BT)链节含量分别为53%和47%(摩尔分数);PBAT的玻璃化转变温度、最大熔融温度和结晶度分别是-33、122℃和13.16%,其分解温度为280℃;当渗透温度从76℃增加到90℃时,PBAT发泡颗粒密度逐渐降低、发泡倍率逐渐增大,且该条件下制备的PBAT发泡颗粒放置1 d后密度增加、发泡倍率降低,继续延长放置时间至7 d时,其密度和发泡倍率保持不变;当渗透时间从0.5 h延长到2 h时,PBAT发泡颗粒密度逐渐降低、发泡倍率逐渐增加;当渗透时间从2 h延长到3 h时,其密度和发泡倍率保持不变;当渗透压力从10 MPa增加到12 MPa时,PBAT发泡颗粒密度逐渐降低、发泡倍率逐渐增加;当渗透压力从12 MPa增加到14 MPa时,其密度和发泡倍率保持不变。Biodegradable poly(butylene adipate-co-butylene terephthalate)(PBAT)foaming particles were prepared using a supercritical carbon dioxide autoclave foaming technology.The chemical composition and thermal properties of the obtained PBAT were investigated using a nuclear magnetic resonance spectrometer,a gel permeation chromatographer,and a differen-tial scanning calorimeter.Moreover,the effects of infiltration conditions on the foaming properties of PBAT were studied.The results indicated that the molar ratio of butylene adipate segment to butylene terephthalate segment in the PBAT chains was 53 and 47 mol%,respectively.The glass transition temperature,melting peak temperature,and crystallinity degree of PBAT were-33℃,122℃,and 13.16%,respectively.In addition,the obtained PBAT exhibited a decomposition tem-perature of 280℃.When the permeation temperature increased from 76 to 90℃,the density of PBAT foamed particles de-creased but their expansion ratio increased.Their density tended to increase but their expansion ratio decreased after holding for one day.Their density and expansion ratio kept stable when the storage time was increased to seven days.When the per-meation time increased from 0.5 to 2 h,the density of PBAT foamed particles decreased but their expansion ratio increased.With a further increase in permeation time from 2 to 3 h,their density and expansion ratio both kept stable.When the perme-ation pressure increased from 10 to 12 MPa,the density of PBAT foamed particles decreased but their expansion ratio in-creased.Their density and expansion ratio kept unchanged with a further increase in permeation pressure from 12 to 14 MPa.

关 键 词：聚对苯二甲酸-己二酸-丁二醇酯 超临界二氧化碳 生物可降解共聚酯 发泡颗粒 

分 类 号：TQ328[化学工程—合成树脂塑料工业]