Mudiyanselage Thilini K, Neckers Douglas C
Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio, 43403, USA.
Soft Matter. 2008 Mar 20;4(4):768-774. doi: 10.1039/b712642p.
Photochromic superabsorbent polymers (PSAPs) with a hydrophilic core and a photochromic shell were prepared by inverse suspension polymerization using acrylic acid (AA) and acrylamide (AM) as monomers, potassium persulfate as the initiator, N,N'-methylene bisacrylamide (BIS) as a cross-linker, sorbitan monostearate (Span60) as the dispersant, cyclohexane as the solvent and bis(methacryloylamino)azobenzene (AC) as the photochromic surface cross-linker. The polymer was characterized by NMR, infrared spectroscopy, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Water absorption (Q) and the photoresponse of the PSAPs was investigated. The PSAPs prepared have excellent water absorption (2800 g g-1). When the sample is irradiated at 350 nm water expulsion from the swollen PSAPs was observed.
采用丙烯酸（AA）和丙烯酰胺（AM）作为单体、过硫酸钾作为引发剂、N，N'-亚甲基双丙烯酰胺（BIS）作为交联剂、失水山梨醇单硬脂酸酯（Span60）作为分散剂、环己烷作为溶剂以及双（甲基丙烯酰氨基）偶氮苯（AC）作为光致变色表面交联剂，通过反相悬浮聚合法制备了具有亲水性核和光致变色壳的光致变色超吸水性聚合物（PSAPs）。通过核磁共振、红外光谱、差示扫描量热法（DSC）和热重分析（TGA）对该聚合物进行了表征。研究了PSAPs的吸水率（Q）和光响应。所制备的PSAPs具有优异的吸水率（2800 g g-1）。当样品在350 nm处照射时，观察到溶胀的PSAPs中有水排出。
