摘要
聚合松香是三环二萜类结构小分子松香的二聚物,属于绿色可再生且可降解的化工原料。以小量聚合松香对聚乳酸进行诱导成纤,在常规的熔纺设备上即可获得连续的微纳米聚乳酸纤维束。使用Materials Studio对聚合松香与聚乳酸的共混过程进行分子动力学模拟。通过分析Flory-Huggins相互作用参数及径向分布函数,发现聚乳酸和聚合松香的比例在70∶30~40∶60之间时,相容性最好。通过热重分析,确定了共混体系纺丝温度为190℃,旋转流变测试证明了在纺丝过程中,聚合松香刚性小分子能够渗透到聚乳酸分子链之间。通过差示扫描量热测试得到聚合松香含量为50%时,结晶度达到了75.3%。熔融纺丝试验及电镜测试验证了40%的聚合松香可以使聚乳酸形成微纳米纤维束最细可达400 nm。
Polymerized rosin is a dimer of small molecule rosin with tricyclic diterpenoid structure.It is a green,renewable and degradable chemical raw material.The continuous micro nano poly(lactic acid)fiber bundles can be obtained on the conventional melt spinning equipment by inducing the fiber formation of poly(lactic acid)with a small amount of polymerized rosin.Materials Studio was used to simulate the blending process of polymeric rosin and polylactic acid.Through the analysis of Flory-Huggins interaction parameters and radial distribution function,it was found that when the ratio of polylactic acid and polymeric rosin was between 70∶30~40∶60,the compatibility was the best.The spinning temperature of the blend system was determined to be 190℃by thermogravimetric analysis.The rotational rheological test showed that the rigid small molecules of polymeric rosin could penetrate into the molecular chain of polylactic acid during the spinning process.The crystallinity reached 75.3%when the content of polymerized rosin was 50%by differential scanning calorimetry.Melt spinning test and electron microscope test verified that 40%of polymerized rosin can form micro/nano fiber bundle of polylactic acid,and the smallest can reach 400 nm.
作者
齐浩彤
王文刚
钱裕洁
侯秀良
徐荷澜
QI Hao-tong;WANG Wen-gang;QIAN Yu-jie;HOU Xiu-liang;XU He-lan(Key Laboratory of Ecological Textiles,Ministry of Education,Jiangnan University,Wuxi 214122,China)
出处
《应用化工》
CAS
CSCD
北大核心
2023年第4期1126-1132,1143,共8页
Applied Chemical Industry
基金
中国博士后科学基金面上项目(2019M651699)
中国纺织工业联合会应用基础研究项目(J202008)。
关键词
聚乳酸
聚合松香
微纳米纤维
分子动力学模拟
PLA
polymerized rosin
micro nano fiber
molecular dynamics simulation
