رسانای الکتریکی، قدرتمندی مکانیکی، هیدروژل های کامپوزیت گرافن/پلیمر حساس به PH
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|57851||2015||8 صفحه PDF||سفارش دهید||5160 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Composites Science and Technology, Volume 127, 28 April 2016, Pages 119–126
Electrically conductive yet mechanically strong composite hydrogels are highly desired in many applications, and graphene would be the most promising candidate for these hydrogels. While previous research utilized either as-prepared or reduced graphene oxide, we herein prepared high structural integrity yet solution-processable graphene sheets for the development of graphene/polymer composite hydrogels. A percolation threshold of electrical conductivity was found at 0.4 vol% graphene for these hydrogels. At 1.0 vol%, Young's modulus and compressive strength were respectively enhanced from 1.64 to 19.03 MPa and from 0.37 to 6.90 MPa, corresponding to 1060% and 1765% improvements. These improvements were explained from the perspectives of the graphene sheets' dispersion and their interaction with the polymer and water molecules. It is worth noting that the addition of graphene improved the hydrogel pH sensitivity.