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Development of intelligent films with cylindrical nanopores that open and close depending on temperature

开发具有根据温度打开和关闭的圆柱形纳米孔的智能薄膜

基本信息

批准号：
09555291
负责人：
KATAKAI Ryoichi
金额：
$ 5.95万
依托单位：
Gunma University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555291/
关键词：
Thermo-responsive hydrogel nanopore with a switch polymer containing amino acid side chain intelligent film material permeation p-nitrophenol 温度応答ヒドロゲル

项目摘要

The aim of this research project is to develop intelligent films with cylindrical nanopores that open and close depending on temperature.Diethyleneglycol bisallylcarbonate (DEBA, CR-39) was copolymerized with (meth)acryloyl L-amino acid esters to give copolymer films 38μm in thickness. ィイD184ィエD1Kr and ィイD1129ィエD1Xe were irradiated to the films with TIARA at Takasaki Institute, JAERI. The films irradiated were treated with 6M NaOH aqueous solution at 60゜C to give cylindrical nanopores.The films with nanopores were treated in the aqueous solution of (meth)acryloyl L-amino acid methyl esters with irradiation of γ-rays from ィイD160ィエD1Co. The (meth)acryloyl derivatives were graft-polymerized to give a thin layer of hydrogel at the surface of the films. Since the thin layer of hydrogel can swell at a low temperature and shrink at a high temperature, the swollen gel layer closes the nanopores and the shrunken hydrogel layer opens them. We, then developed an intelligent film with nanopores th … More at open and close depending on temperature. The chemistry of hydrogels consisting of (meth)acryloyl L-amino acid methyl esters was studied. The phase transition temperature from the swollen state to the shrunken state of the hydrogels varies with the hydrophobic-hydrophilic balance of the copolymers.Permeation of p-nitrophenol through the intelligent film was studied. p-Nitrophenol permeated through the film without hydrogel layer. The permeation constant gradually and linearly increased with elevation of temperature. The permeation constant of p-nitrophenol through pores with the surface hydrogel layer changed dramatically depending on temperature. The constant was very low under the phase transition temperature of the surface hydrogel, and jumped at the transition temperature to become close to the value of that for the pores without surface hydrogel. The high values of the constant are maintained over the phase transition temperature.In conclusion, we are able to develop the intelligent films with nanopores that open under the phase transition temperature of the surface hydrogel and close over the transition temperature. The films can be used as a device for selective permeation of materials with variation of temperature. Less

该研究项目的目的是开发具有根据温度打开和关闭的圆柱形纳米孔的智能薄膜。二甘醇双烯丙基碳酸酯（DEBA，CR-39）与（甲基）丙烯酰L-氨基酸酯共聚，得到厚度为38μm的共聚物薄膜。ィイD184ィエD1Kr和ィイD1129ィエD1Xe在JAERI高崎研究所用TIARA照射到胶片上。将经照射的膜在60℃下用6M NaOH水溶液处理以得到圆柱形纳米孔。将具有纳米孔的膜在(甲基)丙烯酰L-氨基酸甲酯的水溶液中用来自ィイD160ィD1Co的γ射线照射进行处理。 (甲基)丙烯酰衍生物进行接枝聚合，在薄膜表面形成一层薄薄的水凝胶。由于水凝胶薄层可以在低温下膨胀并在高温下收缩，因此膨胀的凝胶层封闭纳米孔，而收缩的水凝胶层打开纳米孔。然后，我们开发了一种具有纳米孔的智能薄膜，其根据温度打开和关闭。研究了由(甲基)丙烯酰L-氨基酸甲酯组成的水凝胶的化学性质。水凝胶从溶胀状态到收缩状态的相变温度随共聚物的疏水-亲水平衡而变化。研究了对硝基苯酚通过智能膜的渗透。对硝基苯酚渗透过没有水凝胶层的薄膜。随着温度的升高，渗透常数逐渐线性增加。对硝基苯酚通过表面水凝胶层孔隙的渗透常数根据温度发生显着变化。在表面水凝胶的相变温度下，该常数非常低，并且在转变温度下跳跃到接近没有表面水凝胶的孔的值。在相变温度范围内，该常数保持较高的值。总之，我们能够开发出具有纳米孔的智能薄膜，该纳米孔在表面水凝胶的相变温度下打开，并在相变温度以上关闭。该薄膜可用作随温度变化选择性渗透材料的装置。较少的