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Combining Acid- and Base-Imprinted Nanoparticles in a Hydrogel Film for Temperature-Responsive Quick and Reversible Capture of Salt
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2019-12-31 , DOI: 10.1021/acsapm.9b00940 Yu Hoshino 1 , Mitsunori Moribe 1 , Naoki Gondo 1 , Toshiki Jibiki 1 , Masahiko Nakamoto 1 , Benshuai Guo 1 , Rinoka Adachi 1 , Yoshiko Miura 1
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2019-12-31 , DOI: 10.1021/acsapm.9b00940 Yu Hoshino 1 , Mitsunori Moribe 1 , Naoki Gondo 1 , Toshiki Jibiki 1 , Masahiko Nakamoto 1 , Benshuai Guo 1 , Rinoka Adachi 1 , Yoshiko Miura 1
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Hydrogel films that reversibly absorb salt in response to thermal stimuli are prepared and evaluated. Co-immobilization of temperature responsive poly(N-isopropylacrylamide) (polyNIPAm) nanoparticles (NPs) in which carboxylic acids and amines are imprinted is crucial in the design of the film. At high temperatures, acids and bases are imprinted in the NPs in deionized form and thus NPs are not capable of capturing counterions. However, at low temperatures, the NPs swell and denature from the imprinted structures and are thus capable of absorbing salts by providing counterions. The absorbed salts are released upon heating owing to the regeneration of the imprinted acids and bases. The imprinted microenvironment around the acids and bases as well as the spatial distribution of the functional groups is crucial in the design of the films. The films showed quick phase transition behavior of which relaxation time is about 800 ms and can reversibly capture up to 468 μmol/g (27 mg/g) of NaCl in a heating and cooling cycle. It was demonstrated that the films can almost completely desalinate (>90%) a sugar solution and can be immediately regenerated by heating.
中文翻译：
在水凝胶膜中结合酸和碱印迹的纳米颗粒，以快速响应温度的可逆捕获盐
制备并评估响应热刺激可逆地吸收盐的水凝胶薄膜。温度响应性聚（N）的共固定化在膜的设计中印有羧酸和胺的-异丙基丙烯酰胺）（polyNIPAm）纳米颗粒（NPs）至关重要。在高温下，酸和碱以去离子形式被印在NP中，因此NP无法捕获抗衡离子。然而，在低温下，NPs从被压印的结构中溶胀并变性，因此能够通过提供抗衡离子来吸收盐分。由于压印的酸和碱的再生，吸收的盐在加热时释放。酸和碱周围的印迹微环境以及官能团的空间分布对于薄膜的设计至关重要。薄膜显示出快速的相变行为，其弛豫时间约为800毫秒，在加热和冷却循环中可逆地捕获高达468μmol/ g（27 mg / g）的NaCl。已证明该膜几乎可以使糖溶液几乎完全脱盐（> 90％），并且可以通过加热立即再生。
更新日期：2019-12-31
中文翻译：
在水凝胶膜中结合酸和碱印迹的纳米颗粒，以快速响应温度的可逆捕获盐
制备并评估响应热刺激可逆地吸收盐的水凝胶薄膜。温度响应性聚（N）的共固定化在膜的设计中印有羧酸和胺的-异丙基丙烯酰胺）（polyNIPAm）纳米颗粒（NPs）至关重要。在高温下，酸和碱以去离子形式被印在NP中，因此NP无法捕获抗衡离子。然而，在低温下，NPs从被压印的结构中溶胀并变性，因此能够通过提供抗衡离子来吸收盐分。由于压印的酸和碱的再生，吸收的盐在加热时释放。酸和碱周围的印迹微环境以及官能团的空间分布对于薄膜的设计至关重要。薄膜显示出快速的相变行为，其弛豫时间约为800毫秒，在加热和冷却循环中可逆地捕获高达468μmol/ g（27 mg / g）的NaCl。已证明该膜几乎可以使糖溶液几乎完全脱盐（> 90％），并且可以通过加热立即再生。
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