第36卷第4期 2016年12月
化学传感器 CHEMICALSENSORS
Vol. 36, No. 4 Dec .2 0 1 6
明胶银纳米复合材料封装的毛细管阵列用于甲醛的
可视化比色分析
姜耀1，孙宗招，龙大成2，段志强12，刘陵瑷1，王雪2，王桦12(1.曲卓师范大学化学与化工学院，山东省生命有机分析重点实验室，山东曲卓273165
(2.济宁市功能材料与监测器件工程技术中心，山东三生新材料科技有限公司，山东济宁272000）
摘要：以明胶为还原剂和稳定剂，借助低温速冻终止反应技术，一锅式合成了包含银纳米颗粒与银离子的明胶银纳米复合材料，进而将之共价修饰于经氨基化的毛细管内壁，制成对甲醛敏感的功能化毛细管阵列。通过毛细现象自动吸取样品，在碱性环境下，利用银纳米颗粒催化甲醛还原其中银离子，引起银颗粒的
增长变色，实现了对水产品中甲醛的灵敏、快速、高通量、可视化的比色检测。关键调：明胶银纳米材料；毛细管阵列；毛细现象；甲醛；比色检测
Encapsulating gelatin-silver nanocomposites onto arrayed capillary
tubes toward a visual colorimetric strategy for formaldehyde Jiang Yao ', Sun Zong-zhao', Long Da-cheng, Duan Zhi-qiang'2, Liu Ling-yuan', Wang Xue?, Wang Hua 1.2(1. The Key Laboratory of LifeOrganic Analysis, Qufu Nomal University. Qufu 273165, China)(2. Jining Functional Materials and Monitoring Devices E & T Center, Jining 272000, China)
Abstract: Gelatinsilver nanocomposites were synthesized by the onepot reactions using gelatin as the reductant and stable agent, which was skillfully stopped at a suitable reaction time by quick freezing. The so prepared nanocomposites containing simultaneously silver nanoparticles and silver ions were covalently encapsulated onto the aminederivatized inner surface of arrayed capillary tubes serving as the functionalized platform for the rapid and eaeoosseoaaeoaoaa sucked into the capillary tubes by the capillarity. Under the alkaline environment, formaldehyde would reduce silver ions catalyzed by silver nanoparticles in the gelatin silver nanocomposites, so that the metallic silver could be deposited onto the surface of catalytic silver nanoparticles showing a visual color change. Subsequently, the developed visual colorimetric sensing system was employed to probe formaldehyde in aquatic products with high detection sensitivity.
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0引言
甲醛是一种重要的化工原料和有机溶剂，常
用于制造树脂、塑料及橡胶等工业用品，也可用作防腐剂用于食品以及化妆品等。人体长期接触这些材料，会使体内甲醛浓度逐渐积累而危害人
体健康。例如，甲醛可直接破坏生物体内细胞蛋白质，对人的皮肤、呼吸道及内脏造成损害，麻醉人的中枢神经，引起肺水肿、肝昏迷、肾衰竭等食品中如鱼贝类水产品常加入甲醛溶液（俗称福尔马林)防腐，人体长期接触福尔马林可导致癌症。因此，世界卫生组织将甲醛列为致畸和引起
基金项目：国家自然科学基金（21675099）、国家科技部“星火计划"（2015GA105005)和山东省西部经济隆起带基层科技人才计划(XB2016CX014)资助
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