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首页> 外文期刊>Acta biomaterialia >Mechanical testing of electrospun PCL fibers
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Mechanical testing of electrospun PCL fibers

机译：电纺PCL纤维的机械测试

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摘要

Poly(-caprolactone) (PCL) fibers ranging from 250 to 700 nm in diameter were produced by electrospinning a polymer tetrahydrofuran/N,N-dimethylformamide solution. The mechanical properties of the fibrous scaffolds and individual fibers were measured by different methods. The Young's moduli of the scaffolds were determined using macro-tensile testing equipment, whereas single fibers were mechanically tested using a nanoscale three-point bending method, based on atomic force microscopy and force spectroscopy analyses. The modulus obtained by tensile-testing eight different fiber scaffolds was 3.8 ± 0.8 MPa. Assuming that PCL fibers can be described by the bending model of isotropic materials, a Young's modulus of 3.7 ± 0.7 GPa was determined for single fibers. The difference of three orders of magnitude observed in the moduli of fiber scaffolds vs. single fibers can be explained by the lacunar and random structure of the scaffolds.
机译：通过电纺聚合物四氢呋喃/ N，N-二甲基甲酰胺溶液生产直径范围为250至700 nm的聚己内酯（PCL）纤维。纤维支架和单个纤维的机械性能通过不同的方法测量。支架的杨氏模量是使用宏观拉伸测试设备确定的，而单纤维是使用纳米级三点弯曲法基于原子力显微镜和力谱分析进行机械测试的。通过拉伸测试八个不同的纤维支架获得的模量为3.8±0.8 MPa。假设PCL纤维可以用各向同性材料的弯曲模型描述，则单纤维的杨氏模量为3.7±0.7 GPa。纤维支架与单纤维的模量中观察到的三个数量级的差异可以通过支架的腔隙和随机结构来解释。

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