可调控结构色互穿纳米水凝胶的合成及凝胶化转变  

Synthesis and sol-gel transition of interpenetrating nanogels with controllable structural color

作　　者：夏婷婷 李雪婷 鲁希华 Tingting Xia;Xueting Li;Xihua Lu(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China;Fujian Nano-Micro Advanced Materials Sc.&Tech Co.,Ltd.,Jinjiang,Fujian 362200,China;Shanghai Evanston Advanced Materials Sc.&Tech Co.,Ltd.,Shanghai 200082,China)

机构地区：[1]东华大学化学与化工学院,上海201620 [2]福建纳微新材料科技有限公司,福建晋江362200 [3]上海爱文斯顿新材料科技有限公司,上海200082

出　　处：《日用化学工业（中英文）》2024年第8期911-920,共10页China Surfactant Detergent & Cosmetics

基　　金：国家自然科学基金面上项目(52173157);中央高校基本科研业务费专项资金资助(2232022A-07)。

摘　　要：研究合成了具有温度和pH响应性的PNIPAM/PAphe互穿纳米水凝胶,通过红外光谱、扫描电镜、动态光散射仪、光纤光谱仪等技术,详细研究了互穿纳米水凝胶的结构和形貌、粒径与分散性、温度和pH响应性、结构色调控与光子晶体自组装,以及凝胶化转变行为。根据红外光谱和扫描电镜图确认了两种网络的有效互穿和其良好的单分散性。通过粒径分析可以得到随着PAphe含量的增加,互穿纳米水凝胶的粒径相应增大,但单分散性保持良好。利用温度和pH敏感性实验证明了该互穿纳米水凝胶的智能调控响应性,具体表现为:在温度上升或pH值下降的条件下,其粒径显著减小。结合光纤光谱图,进一步发现该互穿纳米水凝胶能够通过调整粒径大小来实现其结构色的可调控性。更为重要的是,通过试管倒置法发现在相变温度(32℃)以上该纳米凝胶具有从溶胶转变到凝胶的能力,展现了其在高度可调控的光学材料及生物医学领域中的应用潜力。The PNIPAM/PAphe interpenetrating nanogels which were responsive to temperature and pH were synthesized.The chemical structure,morphology,particle size and dispersity,temperature-and pH-response,structural color tunability,photonic crystal self-assembly,and sol-gel transition behavior of the interpenetrating nanogels were studied in detail by infrared spectroscopy,scanning electron microscopy(SEM),dynamic light scattering,and optical fiber spectrometry.According to the infrared spectrum and SEM image,the effective interpenetration and good monodispersity of the two networks were confirmed.The analysis of particle size and polydispersity index(PDI)indicated that,with the increase of PAphe content,the particle size of the interpenetrating nanogels correspondingly increased,but the monodispersity remained good.The temperature-and pH-sensitivity experiments proved the responsiveness of the interpenetrating nanogels,which showed that the particle size was significantly decreased when the temperature was increased or the pH value was decreased.Combined with the optical fiber spectrum,it was further found that the interpenetrating nanogel could achieve controllable structural colors by adjusting the particle size.More importantly,they possessed the ability of transition from sol to gel above T_(p)(32℃)by the method of test tube inversion.These characteristics showed their potential applications in highly controllable optical materials and the biomedical field.

关 键 词：互穿纳米水凝胶 双重响应性 凝胶化 结构色 

分 类 号：TQ427.2[化学工程]