Synthetically simple, highly resilient hydrogels.

Synthetically simple, highly resilient hydrogels.
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DOI:
10.1021/bm300015s
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发表时间:
2012-03-12
期刊:
影响因子:
6.2
通讯作者:
Tew, Gregory N.
Tew, Gregory N.
中科院分区:
化学2区
文献类型:
--
作者:
Cui, Jun;Lackey, Melissa A.;Madkour, Ahmad E.;Saffer, Erika M.;Griffin, David M.;Bhatia, Surita R.;Crosby, Alfred J.;Tew, Gregory N.

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通过使用有效的硫醇-异戊二烯化学将亲水性聚乙二醇(PEG)和疏水性聚二甲基硅氧烷(PDMS)聚合物链交联,合成了高弹性合成水凝胶。通过PEG和PDMS的相对量很好地控制水凝胶的溶胀和机械性能。此外,在高达300%的应变下,机械能存储效率(弹性)大于97%。这与已知的最有弹性的材料之一:天然弹性蛋白,一种在许多昆虫中发现的弹性蛋白,如跳蚤的肌腱和蜻蜓的翅膀。这些水凝胶的高回弹性可归因于由多功能化学、低交联密度和聚合物链中缺乏二级结构提供的明确的网络结构。
Highly resilient synthetic hydrogels were synthesized by using the efficient thiol-norbornene chemistry to cross-link hydrophilic poly(ethylene glycol) (PEG) and hydrophobic polydimethylsiloxane (PDMS) polymer chains. The swelling and mechanical properties of the hydrogels were well-controlled by the relative amounts of PEG and PDMS. In addition, the mechanical energy storage efficiency (resilience) was more than 97% at strains up to 300%. This is comparable with one of the most resilient materials known: natural resilin, an elastic protein found in many insects, such as in the tendons of fleas and the wings of dragonflies. The high resilience of these hydrogels can be attributed to the well-defined network structure provided by the versatile chemistry, low cross-link density, and lack of secondary structure in the polymer chains.
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