基于超临界二氧化碳釜压发泡技术制备生物可降解聚丁二酸对苯二甲酸丁二醇共聚酯发泡颗粒  

Preparation of Biodegradable Poly(butylene succinate terephthalate)Copolyester Foamed Particles Based on Supercritical Carbon Dioxide Autoclave Foaming Technology

作　　者：冀峰 张艳 龚炜华 于庆雨 朱君秋 郭江彬 罗水源 Feng Ji;Yan Zhang;Weihua Gong;Qingyu Yu;Junqiu Zhu;Jiangbin Guo;Shuiyuan Luo(College of Chemical Engineering and Materials,Fujian Engineering and Research Center of Green and Environment-Friendly Functional Footwear 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：《高分子材料科学与工程》2022年第4期66-72,共7页Polymer Materials Science & Engineering

基　　金：福建省重大科技计划(2020HZ06019);泉州市科技计划(2017CT001,2019C106);福建省自然科技计划(2020J05155);泉州师范学院引进人才科研启动经费(H19003,G16021)。

摘　　要：文中首次使用超临界二氧化碳釜压发泡技术制备了生物可降解聚丁二酸对苯二甲酸丁二醇共聚酯(PBST)发泡颗粒。核磁共振分析结果表明,PBST中丁二酸的摩尔分数是55%;差示扫描量热分析结果表明,PBST的玻璃化转变温度和熔点分别是-16℃和118℃;热重分析结果表明,PBST的分解温度是312℃。研究了渗透温度、渗透时间和渗透压力对PBST发泡颗粒密度和发泡倍率的影响。结果表明,当渗透温度从60℃上升到80℃,PBST发泡颗粒的密度逐渐降低、发泡倍率逐渐增大。PBST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,密度和发泡倍率均保持不变;当渗透时间从1 h延长到2 h,PBST发泡颗粒的密度逐渐降低,发泡倍率逐渐增加。当渗透时间从2 h延长到3 h,PBST发泡颗粒的密度和发泡倍率保持不变;当渗透压力从10 MPa增加到12 MPa,PBST发泡颗粒的密度逐渐降低,发泡倍率逐渐增加;当渗透压力从12 MPa增加到14 MPa时,PBST发泡颗粒的密度和发泡倍率保持不变;PBST发泡颗粒的最佳渗透温度是70℃、渗透时间是2 h、渗透压力是12 MPa。扫描电镜结果显示,PBST发泡颗粒的平均泡孔在10μm左右。Biodegradable poly(butylene succinate terephthalate)copolyester(PBST)foamed particles were prepared by supercritical carbon dioxide autoclave foaming technology for the first time.1H-NMR analysis shows that the molar fraction of succinic acid in PBST is 55%.Differential scanning calorimetry results show that the glass transition temperature and melting point of PBST are-16℃and 118℃,respectively.Thermogravimetric results show that the decomposition temperature of PBST is 312℃.The effects of permeation temperature,permeation time and permeation pressure on the density and expansion ratio of PBST foamed particles were studied.The results shows that when the permeation temperature increases from 60℃to 80℃,the density of PBST foamed particles decreases and the expansion ratio increases.When PBST foamed particles are kept for 1 d,the density of PBST foamed particles increases and the expansion ratio of PBST foamed particles decreases.When the storage time is increased to 7 d,the density and expansion ratio remain unchanged;when the permeation time increases from 1 h to 2 h,the density of PBST foamed particles decreases and the expansion ratio increases;when the permeation time is increased from 2 h to 3 h,the density and expansion ratio of PBST foamed particles remain unchanged;when the permeation pressure is increased from 10 MPa to 12 MPa,the density of PBST foamed particles decreases and the expansion ratio increases;when the permeation pressure is increased from 12 MPa to 14 MPa,the density and expansion ratio of PBST foamed particles remain unchanged.The optimum permeation temperature,permeation time and permeation pressure of PBST foamed particles are 70℃,2 h,and 12 MPa,respectively.SEM result shows that the average pore size of PBST foamed particles is ca.10μm.This work can provide experimental basis and theoretical guidance for the application of PBST in the field of green environmental protection and lightweight.

关 键 词：超临界二氧化碳 釜压发泡 生物可降解共聚酯 聚丁二酸对苯二甲酸丁二醇共聚酯 发泡颗粒 

分 类 号：TQ328[化学工程—合成树脂塑料工业]