聚（聚乙烯醇）增强和增韧的聚（多巴胺）处理的氧化石墨烯，及其在湿度传感中的应用。

Poly(vinyl alcohol) reinforced and toughened with poly(dopamine)-treated graphene oxide, and its use for humidity sensing.

机构信息

Low Dimensional Carbon Materials Center, ‡School of Mechanical and Nuclear Engineering, §School of Natural Science, and ⊥Center for Multidimensional Carbon Materials, Institute of Basic Sciences, Ulsan National Institute of Science and Technology , UNIST-gil 50, Eonyang-eup, Ulju-gun, Ulsan 689-798 Republic of Korea.

出版信息

ACS Nano. 2014 Jul 22;8(7):6739-47. doi: 10.1021/nn500504s. Epub 2014 Jun 23.

DOI:10.1021/nn500504s

PMID:24911396

Abstract

Poly(dopamine)-treated graphene oxide/poly(vinyl alcohol) ("dG-O/PVA") composite films were made and characterized. G-O was modified with poly(dopamine) in aqueous solution and then chemically reduced to yield poly(dopamine)-treated reduced G-O. A combination of hydrogen bonding, strong adhesion of poly(dopamine) at the interface of PVA and G-O sheets, and reinforcement by G-O resulted in increases in tensile modulus, ultimate tensile strength, and strain-to-failure by 39, 100, and 89%, respectively, at 0.5 wt % dG-O loading of the PVA. The dG-O serves as a moisture barrier for water-soluble PVA, and the dG-O/PVA composite films were shown to be effective humidity sensors over the relative humidity range 40-100%.

摘要

聚多巴胺处理的氧化石墨烯/聚乙烯醇（“dG-O/PVA”）复合薄膜已制备并进行了表征。在水溶液中用聚多巴胺对 G-O 进行改性，然后化学还原得到聚多巴胺处理的还原 G-O。氢键的结合、PVA 和 G-O 片之间聚多巴胺的强粘附以及 G-O 的增强作用，使得在 PVA 的 0.5wt% dG-O 负载下，拉伸模量、极限拉伸强度和断裂应变分别提高了 39%、100%和 89%。dG-O 对水溶性 PVA 起到了防潮作用，dG-O/PVA 复合薄膜在 40-100%的相对湿度范围内显示出有效的湿度传感器性能。