Tuning the Properties of Surface-Anchored Polymer Networks by Varying the Concentration of a Thermally Activated Cross-Linker, Annealing Time, and Temperature in a One-Pot Reaction
Tuning the Properties of Surface-Anchored Polymer Networks by Varying the Concentration of a Thermally Activated Cross-Linker, Annealing Time, and Temperature in a One-Pot Reaction
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通过改变一锅反应中热活化交联剂的浓度、退火时间和温度来调节表面锚定聚合物网络的性能
DOI：
10.1021/acsapm.1c00890
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发表时间：
2021
影响因子：
5
通讯作者：
Genzer, Jan
中科院分区：
文献类型：
--
作者：
Woo, Sun Young;Pandiyarajan, C. K.;Genzer, Jan
我们研究了用热活性6-叠氮磺酰基己基三乙氧基硅烷（6-ASHTES）一锅合成的表面锚定聚合物网络的性质。6-ASHTES是一种双功能凝胶，在100°C以上退火时发生交联和表面锚定反应。我们采用不同分子量（10-1300 kDa）的聚乙烯吡罗烷酮（PVP）作为模型体系，考察了6-ASHTES浓度、退火时间和退火温度对凝胶形成的影响。将PVP/6-ASHTES混合物薄膜沉积在干净的硅片上并退火形成网络层。光谱椭偏法测量交联层的薄膜厚度，由此确定凝胶分数和膨胀比。通过改变PVP/6-ASHTES混合物中6-ASHTES的退火时间、温度和浓度，可以“拨动”网络中PVP的凝胶分数。我们使用一个简单的蒙特卡罗模拟模型来描述交联作为交联剂浓度、反应速率、反应时间和聚合物长度的函数。模型模拟得到的趋势与实验数据在定性上是一致的。
We investigate the properties of surface-anchored polymer networks created via one-pot synthesis using thermally active 6-azidosulfonylhexyltriethoxysilane (6-ASHTES). 6-ASHTES is a bifunctional gelator that undergoes cross-linking and surface-anchoring reactions when annealed above 100 °C. We employ a poly(vinylpyrrolidone) (PVP) with different molecular weights (10–1300 kDa) as a model system to examine the effect of 6-ASHTES concentration, annealing time, and annealing temperature on gel formation. A thin film of PVP/6-ASHTES mixture is deposited on a clean silicon wafer and annealed to form network layers. Spectroscopic ellipsometry measures the film thickness of the cross-linked layers from which the gel fraction and swelling ratio are determined. The gel fraction of PVP in the network can be “dialed in” by varying the annealing time, temperature, and concentration of 6-ASHTES in the PVP/6-ASHTES mixture. We use a simple Monte Carlo simulation model to describe cross-linking as a function of cross-linker concentration, reaction rate, reaction time, and polymer length. The trends obtained from the model simulations are in qualitative agreement with the experimental data.
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影响因子：
15
作者：
Jonas Kost;Alexander Bleiziffer;Dennis Rusitov;J. Rühe
通讯作者：
Jonas Kost;Alexander Bleiziffer;Dennis Rusitov;J. Rühe
影响因子：
5.5
作者：
Pandiyarajan, C. K.;Genzer, Jan
通讯作者：
Genzer, Jan
采用光引发“嫁接”方法的渐变和图案聚合物刷
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
Timothy P. Enright;Daniel Hagaman;M. Kokoruz;N. Coleman;A. Sidorenko
通讯作者：
A. Sidorenko
影响因子：
5.5
作者：
Pandiyarajan, C. K.;Rubinstein, Michael;Genzer, Jan
通讯作者：
Genzer, Jan