磁组装法简单制备均匀显色的葡萄糖响应型光子晶体凝胶  

Efficient Preparation of Homogeneous Chromogenic Glucose-responsive Photonic Crystal Gels by Magnetic Assembly Method

作　　者：胡亚琴 巨晓洁[1] 汪伟[1] 刘壮[1] 潘大伟 谢锐[1] 褚良银[1] Hu Yaqin;Ju Xiaojie;Wang Wei;Liu Zhuang;Pan Dawei;Xie Rui;Chu Liangyin(School of Chemical Engineering,Sichuan University,Chengdu 610065)

机构地区：[1]四川大学化学工程学院,成都610065

出　　处：《化学学报》2024年第7期782-789,I0002-I0004,共11页Acta Chimica Sinica

基　　金：四川省科技支撑计划项目(2019JDJQ0026)资助.

摘　　要：选用化学稳定性良好的3-丙烯酰胺基苯硼酸(3-APBA)为葡萄糖响应共聚单体、聚(乙烯吡咯烷酮)包覆的磁性纳米颗粒(Fe_(3)O_(4)@PVP MCNCs)作为磁组装单元,在磁场和紫外光照共同作用下引发预聚液聚合形成内部含有有序的一维光子晶体链的葡萄糖响应型光子晶体凝胶.系统探究了MCNCs粒径、浓度、磁场强度及测试环境pH对其响应性能的影响.结果显示,添加了MCNCs(浓度为4 g/L、粒径为181 nm)的预聚液,于8 mT的磁场强度下制备的光子晶体凝胶具有最佳的葡萄糖响应性能.该凝胶能够在0到50 mmol/L的葡萄糖溶液中由蓝色变为橙黄色,达到100 nm衍射波长的迁移,并具有良好的重复使用性能.基于一维磁组装的葡萄糖响应型光子晶体凝胶具有制备工艺简便、结构色均匀和响应稳定可逆等优势,在葡萄糖的可视化检测领域具有潜在的应用前景.To efficiently prepare glucose-responsive photonic crystal gels with homogeneous coloration is still a challenge.A glucose-responsive gel embedded with ordered one-dimensional photonic crystal chains is fabricated by curing the precur-sors under both magnetic field and UV light.The chemically stable 3-acrylamidophenylboronic acid(3-APBA)is selected as the glucose-responsive co-monomer,which is negatively charged after recognizing glucose and makes the gel swelling.However,poly(vinylpyrrolidone)-coated magnetic colloidal nanoparticles(Fe_(3)O_(4)@PVP MCNCs)are prepared by solvother-mal method and used as the magnetic assembly elements for the construction of the one-dimensional photonic crystal struc-ture.MCNCs suspended in dimethyl sulfoxide/ethylene glycol(DMSO/EG)mixed solvent reach equilibrium by both spatial repulsion of PVP shell polymer and magnetic attraction along the direction of applied magnetic field,rapidly arranging into one-dimensional chain-like structures;while in the direction perpendicular to the magnetic field,magnetic particles repel each other and maintain the independent chains.When the total monomer concentration is 2.5 mol/L,the feeding molar ratio of 3-APBA and crosslinker to monomers are respectively 20%and 0.2%,the resultant hydrogel has satisfactory glu-cose-responsive swelling properties.The effects of MCNCs size,concentration,magnetic field strength and environmental pH on the glucose-responsive performance are investigated systematically.The diffraction wavelength of the photonic crystal gels will be red-shifted with the increase of the particle size and concentration of the MCNCs,the decrease of the applied magnetic field strength,and the enhancement of the test environment alkalinity.The results show that the photonic crystal gel,prepared by polymerizing the precursor solution containing MCNCs concentration of 4 g/L and a particle size of 181 nm at a moderate magnetic field strength of 8 mT,has the optimal glucose-responsive performance.It is able to change from blue to orange in

关 键 词：磁组装 光子晶体 葡萄糖响应 水凝胶 可视化 

分 类 号：TQ427.26[化学工程] O734[理学—晶体学]