Nanocomposites containing polyvinyl alcohol and reinforced carbon-based nanofiller: A super effective biologically active material.

Q1 Engineering

Nanobiomedicine Pub Date : 2018-08-26 eCollection Date: 2018-01-01 DOI:10.1177/1849543518794818

Khdejah S Hajeeassa, Mahmoud A Hussein, Yasir Anwar, Nada Y Tashkandi, Zahra M Al-Amshany

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引用次数: 19

Abstract

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-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-carbon nanotubes (2, 5, 10, 15, and 20 wt%) were added to the host polyvinyl alcohol polymer. In this study, polyvinyl alcohol/mixed graphene-carbon nanotubes_a-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-carbon nanotubes into polyvinyl alcohol matrix. X-ray diffraction patterns for these nanocomposites showed 2θ = 19.35° and 40° due to the crystal nature of polyvinyl alcohol in addition to 2θ = 26.5° which attributed to the graphite plane of carbon-based nanofillers. Thermal stability of polyvinyl alcohol/mixed graphene-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 469-491°C. Antibacterial property of polyvinyl alcohol/mixed graphene-carbon nanotubes_a-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-carbon nanotubes_b, polyvinyl alcohol/mixed graphene-carbon nanotubes_c, and polyvinyl alcohol/mixed graphene-carbon nanotubes_d nanocomposites after 24 h are 6%, 5%, and 7% respectively. However, polyvinyl alcohol/mixed graphene-carbon nanotubes_e 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-carbon nanotubes_a-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 × 10⁶-95 × 10⁶.

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含有聚乙烯醇和增强碳基纳米填料的纳米复合材料:一种超级有效的生物活性材料。

以聚乙烯醇和增强混合石墨烯/碳纳米管为碳基纳米填料，采用超声辐射下的高效溶液混合方法，成功合成了一类新型的生物活性聚合物纳米复合材料(简称聚乙烯醇/混合石墨烯-碳纳米管)。混合石墨烯和碳纳米管的比例(50%:50%)是按wt比制备的。不同负载的混合石墨烯-碳纳米管(2、5、10、15和20 wt%)被添加到宿主聚乙烯醇聚合物中。本研究通过x射线衍射、傅里叶变换红外、扫描电镜、透射电镜对聚乙烯醇/混合石墨烯-碳纳米管-e纳米复合材料进行了表征和分析，并通过热重分析和导数热重分析对其热稳定性进行了测定。傅里叶变换红外和x射线衍射光谱证明了在聚乙烯醇基体中加入了混合石墨烯-碳纳米管。这些纳米复合材料的x射线衍射图表明，由于聚乙烯醇的结晶性质，其x射线衍射图为2θ = 19.35°和40°，而碳基纳米填料的石墨平面则为2θ = 26.5°。与纯聚乙烯醇相比，聚乙烯醇/混合石墨烯-碳纳米管纳米复合材料的热稳定性得到增强。主要降解步骤在360°~ 450°C之间。复合材料的最高降解温度为285 ~ 267℃，最终降解温度(FCDT)为469 ~ 491℃。采用菌落形成单元技术研究了聚乙烯醇/混合石墨烯-碳纳米管-e纳米复合材料对大肠杆菌的抑菌性能。结果表明，其抗菌性能有所改善。聚乙烯醇/混合石墨烯-碳纳米管、聚乙烯醇/混合石墨烯-碳纳米管和聚乙烯醇/混合石墨烯-碳纳米管纳米复合材料在24h后的成品率分别为6%、5%和7%。而聚乙烯醇/混合石墨烯-碳纳米管纳米复合材料表现出超活性，其还原率显著提高，达到100%，是最高的抑制率百分比。此外，聚乙烯醇和聚乙烯醇/石墨烯-碳纳米管-d在12 h后的集落形成单位值为70 × 106和65±2 × 106, 24 h后的集落形成单位值为86 × 106 ~ 95 × 106。

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来源期刊

Nanobiomedicine Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

6.80

自引率

0.00%

发文量

审稿时长

14 weeks

期刊介绍： Nanobiomedicine is an international, peer-reviewed, open access scientific journal that publishes research in nanotechnology as it interfaces with fundamental studies in biology, as well as its application to the fields of medicine. Nanobiomedicine covers all key aspects of this research field, including, but not limited to, bioengineering, biophysics, physical and biological chemistry, and physiology, as well as nanotechnological applications in diagnostics, therapeutic application, preventive medicine, drug delivery, and monitoring of human disease. Additionally, theoretical and modeling studies covering the nanobiomedicine fields will be considered. All submitted articles considered suitable for Nanobiomedicine are subjected to rigorous peer review to ensure the highest levels of quality. The review process is carried out as quickly as possible to minimize any delays in the online publication of articles. Submissions are encouraged on all topics related to nanobiomedicine, and its clinical applications including but not limited to: Nanoscale-structured biomaterials, Nanoscale bio-devices, Nanoscale imaging, Nanoscale drug delivery, Nanobiotechnology, Nanorobotics, Nanotoxicology, Nanoparticles, Nanocarriers, Nanofluidics, Nanosensors (nanowires, nanophotonics), Nanosurgery (dermatology, gastroenterology, ophthalmology, etc), Nanocarriers commercialization of nanobiomedical technologies, Market trends in the nanobiomedicine space, Ethics and regulatory aspects of nanobiomedicine approval, New perspectives of nanobiomedicine in clinical diagnostics, BioMEMS, Nano-coatings, Plasmonics, Nanoscale visualization.