%0 Journal Article
%T Nanocomposites containing polyvinyl alcohol and reinforced carbon-based nanofiller
%A Khdejah S Hajeeassa
%A Mahmoud A Hussein
%A Nada Y Tashkandi
%A Yasir Anwar
%A Zahra M Al-amshany
%J Archive of "Nanobiomedicine".
%D 2018
%R 10.1177/1849543518794818
%X A new class of biologically active polymer nanocomposites based on polyvinyl alcohol and reinforced mixed graphene/carbon nanotube as carbon-based nanofillers with a general abbreviation (polyvinyl alcohol/mixed graphene每carbon nanotubes) has been successfully synthesized by an efficient solution mixing method with the help of ultrasonic radiation. Mixed graphene and carbon nanotubes ratio has been prepared (50%:50%) wt by wt. Different loading of mixed graphene每carbon nanotubes (2, 5, 10, 15, and 20 wt%) were added to the host polyvinyl alcohol polymer. In this study, polyvinyl alcohol/mixed graphene每carbon nanotubesa每e nanocomposites were characterized and analyzed by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, and the thermal stability was measured by thermogravimetric analysis and derivative thermal gravimetric. Fourier transform infrared and X-ray diffraction spectra proved the addition of mixed graphene每carbon nanotubes into polyvinyl alcohol matrix. X-ray diffraction patterns for these nanocomposites showed 2牟 = 19.35∼ and 40∼ due to the crystal nature of polyvinyl alcohol in addition to 2牟 = 26.5∼ which attributed to the graphite plane of carbon-based nanofillers. Thermal stability of polyvinyl alcohol/mixed graphene每carbon nanotubes nanocomposites was enhanced comparing with pure polyvinyl alcohol. The main degradation step ranged between 360∼ and 450∼C. Moreover, maximum composite degradation temperature has appeared at range from 285∼C to 267∼C and final composite degradation temperature (FCDT) displayed at a temperature range of 469每491∼C. Antibacterial property of polyvinyl alcohol/mixed graphene每carbon nanotubesa每e nanocomposites were tested against Escherichia coli bacteria using the colony forming units technique. Results showed an improvement of antibacterial property. The rate percentages of polyvinyl alcohol/mixed graphene每carbon nanotubesb, polyvinyl alcohol/mixed graphene每carbon nanotubesc, and polyvinyl alcohol/mixed graphene每carbon nanotubesd nanocomposites after 24 h are 6%, 5%, and 7% respectively. However, polyvinyl alcohol/mixed graphene每carbon nanotubese nanocomposite showed hyperactivity, where its reduction percentage remarkably raised up to 100% which is the highest inhibition rate percentage. In addition, polyvinyl alcohol and polyvinyl alcohol/graphene每carbon nanotubesa每d showed colony forming units values/ml 70 ℅ 106 and 65 ㊣ 2 ℅ 106 after 12 h. After 24 h, the colony forming units values/ml were in the range of 86 ℅ 106每95 ℅ 106
%K Nanocomposites
%K polyvinyl alcohol
%K graphene
%K carbon nanotube
%K biological interest
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6109842/