کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5432229 1508831 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimizing the free radical content of graphene oxide by controlling its reduction
ترجمه فارسی عنوان
بهینه سازی محتوای رادیکال آزاد اکسید گرافین با کنترل کاهش آن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی

Radicals can form at the edges and defect sites on graphene plane. However, the radical content of graphene is too low to be practically useful. This study demonstrates how the radical content of graphene can be enhanced and optimized simply by oxidation and reduction treatments. Graphene oxide nanosheets are produced by oxidation of graphite and different reduction methods including thermal, chemical and photo reduction are used to obtain different degrees of reduction and free radical formation on the nanosheets. The reactivity and usefulness of the radicals are demonstrated for surface and bulk polymerization of butyl acrylate. Compared to a conventional initiator, ammonium persulfate, although the polymerization kinetics is slower when graphene radicals are used, a higher polymerization yield can be achieved. Moreover, the higher stability of graphene radicals helps to avoid the radical-induced polymerization termination, a common problem that limits the efficiency of conventional radical initiators.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 116, May 2017, Pages 703-712
نویسندگان
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