Kopf Sabrina, Root Andrew, Heinmaa Ivo, Aristéia de Lima Juliana, Åkesson Dan, Skrifvars Mikael
Swedish Centre for Resource Recovery, Faculty of Textiles, Engineering and Business, University of Borås, 501 90 Borås, Sweden.
MagSol, Tuhkanummenkuja 2, 00970 Helsinki, Finland.
ACS Omega. 2024 Jun 13;9(25):27415-27427. doi: 10.1021/acsomega.4c02241. eCollection 2024 Jun 25.
We investigated the melt-spinning potential of a poly(3-hydroxybutyrate)/poly(3-hydroxybutyrate--4-hydroxybutyrate) blend using a piston spinning machine with two different spinneret diameters (0.2 and 0.5 mm). Results from the differential scanning calorimetry, dynamic mechanical thermal analysis, and tensile testing showed distinct filament properties depending on the monofilaments' cross-sectional area. Finer filaments possessed different melting behaviors compared to the coarser filaments and the neat polymer, indicating the formation of a different type of polymer crystal. Additionally, the mechanical properties of the finer filament (tensile strength: 21.5 MPa and elongation at break: 341%) differed markedly from the coarser filament (tensile strength: 11.7 MPa, elongation at break: 12.3%). The hydrolytic stability of the filaments was evaluated for 7 weeks in a phosphate-buffered saline solution and showed a considerably reduced elongation at break of the thinner filaments. Overall, the results indicate considerable potential for further filament improvements to facilitate textile processing.
我们使用具有两种不同喷丝板直径（0.2毫米和0.5毫米）的活塞纺丝机，研究了聚（3-羟基丁酸酯）/聚（3-羟基丁酸酯-4-羟基丁酸酯）共混物的熔纺潜力。差示扫描量热法、动态热机械分析和拉伸测试的结果表明，根据单丝的横截面积，长丝具有不同的性能。与较粗的长丝和纯聚合物相比，较细的长丝具有不同的熔融行为，这表明形成了不同类型的聚合物晶体。此外，较细的长丝（拉伸强度：21.5兆帕，断裂伸长率：341%）的机械性能与较粗的长丝（拉伸强度：11.7兆帕，断裂伸长率：12.3%）明显不同。在磷酸盐缓冲盐溶液中对长丝的水解稳定性进行了7周的评估，结果表明较细的长丝的断裂伸长率显著降低。总体而言，结果表明进一步改进长丝以促进纺织加工具有相当大的潜力。
