聚(3-羟基丁酸酯-4-羟基丁酸酯)/聚乳酸纤维的制备及其性能  

Preparation and properties of poly(3-hydroxybutyrate-4-hydroxybutyrate)/poly(lactic acid)fibers

作　　者：陈宇 周长年[3] 朱金唐 彭杰 崔华帅 崔宁 史贤宁 李杰 黄庆 吴鹏飞 CHEN Yu;ZHOU Changnian;ZHU Jintang;PENG Jie;CUI Huashuai;CUI Ning;SHI Xianning;LI Jie;HUANG Qing;WU Pengfei(College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;State Key Laboratory of Biobased Fiber Manufacturing Technology,China Textile Academy,Beijng 100025,China;China Textile Information Center,Beijing 100020,China)

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]中国纺织科学研究院有限公司生物源纤维制造技术国家重点实验室,北京100025 [3]中国纺织信息中心,北京100020

出　　处：《毛纺科技》2024年第4期1-7,共7页Wool Textile Journal

基　　金：国家重点研发计划项目(2022YFB3704900)。

摘　　要：聚(3-羟基丁酸酯-4-羟基丁酸酯)(P34HB)是极具前景的生物基可降解材料,但结晶慢且加工黏度大等因素使其难以直接熔纺制备纤维。左旋聚乳酸(PLLA)与P34HB化学结构相似,加工温度接近,与P34HB具有协同增强作用。采用熔融纺丝法制备P34HB含量为30%的P34HB/PLLA纤维,研究纤维的力学性能、热稳定性能以及结晶性能。结果发现,2000 m/min的卷绕速率下制备的P34HB/PLLA预牵伸纤维(POY)经1.40、1.75倍牵伸和定形后得到的全牵伸纤维(FDY-1和FDY-2)的断裂强度分别为1.66、2.29 cN/dtex,断裂伸长率分别为33.3%、28.8%;差示扫描量热仪(DSC)测试结果显示,POY、FDY-1、FDY-2结晶度分别为62.51%、62.05%、61.36%;XRD衍射仪测试结果也表明POY的结晶度与FDY结晶度相近,这表明在POY成形过程中,纤维中的结晶已经接近完成,P34HB提高了PLLA结晶效率。Poly(3-hydroxybutyrate-4-hydroxybutyrate)(P34HB)stands as a promising biodegradable material,encounters challenges in its direct melt spinning process due to slow crystallization and high processing viscosity.Poly(lactic acid)(PLLA),possessing a similar chemical structure to P34HB,shares comparable processing temperatures and has a synergistic reinforcing effect with P34HB.A P34HB/PLLA fiber with a P34HB content of 30 wt%was fabricated by melt spinning method,subsequently the fiber′s mechanical,thermal,and crystallization properties were examined.Results indicate that the maximum tenacity of fully drawn fibers(FDY-1 and FDY-2),obtained from the preparation of P34HB/PLLA pre-drawn fiber(POY)at a winding speed of 2000 m/min and drawing and setting at 1.40 times and 1.75 times,respectively,are 1.66 cN/dtex and 2.29 cN/dtex respectively,and the elongations at break are 33.3%and 28.8%respectively.The differential scanning calorimetry(DSC)test reveal that the crystallinity of POY,FDY-1,and FDY-2 are 62.51%,62.05%,and 61.36%respectively.Additionally,XRD diffractometer analysis indicates that the crystallinity of POY is similar to that of FDY,suggesting that during the POY formation process,fiber crystallization is nearly complete,and P34HB enhances the crystallization efficiency of PLLA.

关 键 词：聚(3-羟基丁酸酯-4-羟基丁酸酯) 聚乳酸 纤维 热稳定性 力学性能 结晶性能 

分 类 号：TQ340.64[化学工程—化纤工业]