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首页> 外文期刊>RSC Advances >Controllable thermal and pH responsive behavior of PEG based hydrogels and applications for dye adsorption and release
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Controllable thermal and pH responsive behavior of PEG based hydrogels and applications for dye adsorption and release

机译：PEG基水凝胶的可控热响应和pH响应行为及其在染料吸附和释放中的应用

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摘要

A series of controllable thermal and pH dual-responsive copolymeric hydrogels (PMA) were prepared by a one-pot reaction with poly(ethylene glycol) methyl ether acrylate (PEGA), 2-methoxyethyl acrylate (MEA) and acroleic acid (AA). The hydrogels exhibited good mechanical properties and a sensitive response to pH and temperature. Besides, the Lower Critical Solution Temperature (LCST) of the hydrogels can be adjusted from 37?°C to 58 °C by changing the content of AA. The hydrogels also showed excellent selective adsorption properties. The maximum adsorption quantity of organic cationic dye brilliant green and methylene blue were 0.49 mg mg ~(?1) and 0.42 mg mg ~(?1) respectively, much better than previous reports. Furthermore, using the thermal and pH responsibility, the PMA hydrogels can release the adsorbed molecules with control. Nearly 95% of carriers could be released at pH 4.01 and 65 °C over 8 h. The regeneration ability makes the materials easy to reuse many times. Due to these properties, these dual-responsive hydrogels have great potential applications in various fields for adsorption, drug delivery, release and tissue engineering.
机译：通过与聚（乙二醇）甲基丙烯酸甲酯（PEGA），丙烯酸2-甲氧基乙酯（MEA）和丙烯醛（AA）进行一锅反应，制备了一系列可控的热和pH双响应共聚物水凝胶（PMA）。水凝胶表现出良好的机械性能以及对pH和温度的敏感响应。另外，通过改变AA的含量，可以将水凝胶的最低临界溶液温度（LCST）从37℃调节至58℃。水凝胶还显示出优异的选择性吸附性能。有机阳离子染料亮绿色和亚甲基蓝的最大吸附量分别为0.49 mg mg〜（？1）和0.42 mg mg〜（？1），远优于以前的报道。此外，利用热和pH值，PMA水凝胶可以在控制下释放吸附的分子。在8小时内，pH 4.01和65°C下将释放近95％的载体。再生能力使材料易于多次重复使用。由于这些特性，这些双响应水凝胶在吸附，药物输送，释放和组织工程的各个领域具有巨大的潜在应用。

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