One reaction to make highly stretchable or extremely soft silicone elastomers from easily available materials.

One reaction to make highly stretchable or extremely soft silicone elastomers from easily available materials.
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一个反应是从容易获得的材料中制造高度可拉伸或极软的有机硅弹性体。

DOI:
10.1038/s41467-022-28015-2
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发表时间:
2022-01-18
影响因子:
16.6
通讯作者:
Skov AL
Skov AL
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Hu P;Madsen J;Skov AL

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高度可拉伸的软硅酮弹性体对于可拉伸的软装置的制造具有极大的意义。然而,缺乏能够有效制备具有上级拉伸性和柔软性的有机硅弹性体的可用化学品。在这里,我们展示了制备有机硅弹性体的简单固化反应,其中遥爪/多氢硅烷(Si-H)官能化聚二甲基硅氧烷(PDMS)在氧和水存在下的铂催化反应导致缓慢交联。这种固化化学允许弹性体特性的多功能定制,这超过了其固有的限制。具体而言,高度可拉伸的有机硅弹性体(最大应变为2800%)和极软的有机硅弹性体(最低剪切模量为1.2 kPa)均通过分别由商业前体聚合物产生高度缠结的弹性体和瓶刷弹性体来制备。已经探索了几种策略来克服对有机硅弹性体的最终延展性和柔软性的限制,但它们增加了工艺复杂性或导致所得弹性体的机械不稳定性。在这里,作者报告了一种容易的固化反应,该反应允许弹性体性能的多功能定制,超过其固有的限制
Highly stretchable, soft silicone elastomers are of great interest for the fabrication of stretchable, soft devices. However, there is a lack of available chemistries capable of efficiently preparing silicone elastomers with superior stretchability and softness. Here we show an easy curing reaction to prepare silicone elastomers, in which a platinum-catalyzed reaction of telechelic/multi-hydrosilane (Si–H) functional polydimethylsiloxane (PDMS) in the presence of oxygen and water leads to slow crosslinking. This curing chemistry allows versatile tailoring of elastomer properties, which exceed their intrinsic limitations. Specifically, both highly stretchable silicone elastomers (maximum strain of 2800%) and extremely soft silicone elastomers (lowest shear modulus of 1.2 kPa) are prepared by creating highly entangled elastomers and bottle-brush elastomers from commercial precursor polymers, respectively. Several strategies have been explored for overcoming limitations on the ultimate extensibility and softness of silicone elastomers but they either increase process complexity or lead to mechanical instabilities in the resulting elastomers. Here the authors report an easy curing reaction which allows versatile tailoring of elastomer properties exceeding their intrinsic limitations
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发表时间: 2016-03-23
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