Novel approach to tensile testing of micro- and nanoscale fibers
Novel approach to tensile testing of micro- and nanoscale fibers
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DOI：
10.1063/1.1775309
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发表时间：
2004-08
影响因子：
1.6
通讯作者：
E. Tan;C. Lim
中科院分区：
文献类型：
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作者：
E. Tan;C. Lim
由于微米级和纳米级纤维的强度和尺寸，较大的常规万能试验机不适合进行此类纤维的拉伸试验。现有的微拉伸试验机是定制的，并且构造复杂且昂贵。在这里，提出了一种新的方法，使用现有的原子力显微镜（AFM）为基础的纳米压痕系统的拉伸测试的微米级或成束的纳米纤维。以微米级聚（L-乳酸-共-乙醇酸）纤维（直径约25 μm）为例说明了这种技术。首先通过定制的保持器将微纤维连接到纳米压头尖端和基底上，以确保微纤维拉紧并垂直对齐。使用纳米压头的力传感器来测量拉伸微纤维所需的张力。使用AFM系统的步进电机拉伸微纤维。通过减去换能器弹簧的伸长来测量微纤维的伸长。
Due to the strength and size of the micro- and nanoscale fibers, larger conventional universal testing machines are not suitable in performing stretch test of such fibers. Existing microtensile testing machines are custom-made and are complex and expensive to construct. Here, a novel method of using an existing atomic force microscope (AFM)-based nanoindenation system for the tensile testing of microscale or bundled nanoscale fibers is proposed. The microscale poly (L-lactic-co-glycolic acid) fiber (∼25 μm diameter) was used as an example to illustrate this technique. The microfiber was first attached to a nanoindenter tip and the base via a custom-made holder to ensure that the microfiber was taut and vertically aligned. The force transducer of the nanoindenter was used to measure the tensile force required to stretch the microfiber. The microfiber was stretched using the stepper motor of the AFM system. The elongation of the microfiber was measured by subtracting the elongation of the transducer spring ...