کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5183435 1381018 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Graphene sulphonic acid/chitosan nano biocomposites with tunable mechanical and conductivity properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Graphene sulphonic acid/chitosan nano biocomposites with tunable mechanical and conductivity properties
چکیده انگلیسی

Nanocomposites of chitosan are produced using graphene sulphonic acid (SG) at five different compositions and are designated as SG0.5, SG0.75, SG1, SG3 and SG5; the numbers indicate weight percent of SG. The TEM & AFM micrographs indicate that the SG sheets are in exfoliated state. The thermal stability and the storage modulus of the composites increase with increasing SG concentration showing a maximum increase (202%) for SG5 sample. The stresses at break and Young's modulus have increased with increasing SG content. SG5 shows the highest increase of both tensile strength and Young's modulus of 290 ± 7% and 200 ± 7%, respectively. Analysis of the Young's modulus data suggests that SG sheets are randomly distributed and at ≥1 wt% concentration they are unidirectionally oriented parallel to the film. The system exhibits percolation threshold of 0.49 wt% SG and it attains maximum conductivity of 0.13 S m−1 at 1.6 wt% SG.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 53, Issue 11, 9 May 2012, Pages 2265-2273
نویسندگان
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