固化温度对增强PDMS纳米复合材料拉伸性能和硬度的影响,Advances in Materials Science and Engineering

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固化温度对增强PDMS纳米复合材料拉伸性能和硬度的影响
Advances in Materials Science and Engineering Pub Date : 2020-07-16 , DOI: 10.1155/2020/6562373
Yvonne Konku-Asase ₁ , Abu Yaya ₂ , Kwabena Kan-Dapaah ₁

Affiliation

普通聚二甲基硅氧烷（PDMS）及其纳米复合材料的机械性能已被用于各种治疗学生物医学应用。尽管几个研究小组已经研究了制备条件（尤其是固化温度和时间）对普通PDMS整体机械性能的影响，但尚无关于其纳米复合材料的类似研究的报道。在这项研究中，PDMS的机械性能由不同的体积分数增强（卷％）的-纳米颗粒（NP）进行了研究和定量数据提出了不同的固化温度（25，100，和150℃）。在很大程度上，-纳米颗粒是均匀地分散在基质PDMS与形成没有主化学键。对于所测试的温度，数据显示，随着NP浓度的增加，杨氏模量（）增加约170％（1.36-3.71 MPa），极限抗拉强度（）降低约65％（MPa）。此外，硬度（邵氏A）（）随固化温度增加而随浓度降低。根据这些发现，我们得出结论，计算出的机械性能（，，）和小与固化温度无关。实验数据为PDMS纳米复合材料制造工艺参数的选择提供了有用的背景信息。

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Curing Temperature Effects on the Tensile Properties and Hardness of Reinforced PDMS Nanocomposites

The mechanical properties of plain polydimethylsiloxane (PDMS) and its nanocomposites have been exploited for various theranostic biomedical applications. Although several research groups have investigated the effects of preparation conditions—especially curing temperature and time—on bulk mechanical properties of plain PDMS, there are no reported similar studies for its nanocomposites. In this study, mechanical properties of PDMS reinforced by different volume fractions ( vol. %) of - nanoparticles (NPs) were investigated and quantitative data presented for different curing temperatures (25, 100, and 150°C). To a large extent, - NPs were uniformly dispersed in the PDMS matrix with no primary chemical bonds formed. For the temperatures tested, the data showed an increase for Young’s modulus () of about 170% (1.36–3.71 MPa) and a decrease of the ultimate tensile strength () of about 65% ( MPa) with increasing concentration of the NPs. Furthermore, hardness (Shore A) () increased with curing temperature but decreased with concentration. Based on the findings, we conclude that the linear relationship between the calculated mechanical properties (, , ) and small is independent of the curing temperature. The experimental data provide useful background information for the selection of processing parameters for PDMS nanocomposite fabrication.

更新日期：2020-07-16

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