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首页> 外文期刊>Acta biomaterialia >Effect of electron beam irradiation on the structure and properties of electrospun PLLA and PLLA/PDLA blend nanofibers.
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Effect of electron beam irradiation on the structure and properties of electrospun PLLA and PLLA/PDLA blend nanofibers.

机译：电子束照射对电纺PLLA和PLLA / PDLA混合物纳米纤维的结构和性能的影响。

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摘要

Poly(L-lactide) (PLLA) and a PLLA/poly(D-lactide) (PDLA) blend (50/50 wt.%) were electrospun into nanofibers. Electron beam (e-beam) irradiation of the electrospun PLLA and blend nanofibers was used as a method to alter their structures and surface properties. The crystalline structures of the nanofibers before and after irradiation were investigated by differential scanning calorimetry. Tensile tests of the aligned nanofibers were also performed to determine the effects of irradiation on the mechanical properties of the nanofibers. The hydrophilicity of the nanofibers was determined by water contact angle measurements, while any degradation of the fibers caused by irradiation could be detected by intrinsic viscosity measurements. The e-beam irradiation method was able to improve the surface hydrophilicity of the PLLA and blend nanofibers, although bulk degradation was inevitable.
机译：将聚（L-丙交酯）（PLLA）和PLLA / poly（D-丙交酯）（PDLA）混合物（50/50重量％）进行电纺成纳米纤维。 电纺PLLA和共混纳米纤维的电子束（电子束）照射用作改变其结构和表面性质的方法。 通过差示扫描量热法研究了辐射前后纳米纤维的晶体结构。 还进行了取向纳米纤维的拉伸试验以确定照射对纳米纤维的机械性能的影响。 通过水接触角测量测定纳米纤维的亲水性，而通过固有粘度测量可以检测由辐射引起的纤维的任何降解。 电子束照射方法能够改善PLLA和共混纳米纤维的表面亲水性，但体积降解是不可避免的。

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