Processing and Characterization of Polypropylene Nanocomposite Films Reinforced with Hexagonal Boron Nitride Nanosheets

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
G. Bayramoglu, Mehmet Mudu
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Abstract

In this study, we synthesized hexagonal boron nitride nanosheets (h-BNN) via the molten hydroxide exfoliation method which results in small flakes and nanoscrolls. The resultant h-BNNs can be dispersed in various solvents such as water, ethanol, and acetone, and form a stable dispersion. The morphological and structural analysis of h-BNNs were performed with Fourier Transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM). The masterbatch (MB) method was used to incorporate the h-BNNs into the polypropylene (PP) matrix via melt mixing. Dilution and film production processes were performed using a twin screw extruder. Nanocomposite films having an h-BNN weight ratio of 1%, 2%, 3%, and 5% were prepared. Thermogravimetric analyzer (TGA) and differential scanning calorimetry (DSC) were used to investigate the thermal stability. Crystallization (Tc) temperatures were increased with the increased amount of h-BNNs and h-BNNs nucleating agent behavior on the PP crystallization was observed. Oxidation induction time (OIT) of the pure PP was increased from 8.84 min to 17.82 min. The results show a considerable effect of the h-BNN content on the thermo-oxidative stability of the nanocomposites studied. The rheological and mechanical properties of the PP-hBNN nanocomposite films were also determined depending on the particle loading ratio. Optimum particle content providing the best thermal, mechanical, and rheological properties were found to be 3% wt.
六方氮化硼纳米片增强聚丙烯纳米复合薄膜的制备与表征
在本研究中,我们采用熔融氢氧化物剥离法合成了六方氮化硼纳米片(h-BNN),得到了小薄片和纳米卷。得到的h- bnn可以分散在各种溶剂中,如水、乙醇和丙酮,并形成稳定的分散体。利用傅里叶变换红外光谱(FTIR)、x射线衍射(XRD)和扫描电镜(SEM)对h-BNNs进行了形态和结构分析。采用母粒(MB)法将h-BNNs通过熔融混合掺入聚丙烯(PP)基体中。稀释和薄膜生产过程使用双螺杆挤出机进行。制备了h-BNN重量比分别为1%、2%、3%和5%的纳米复合膜。采用热重分析仪(TGA)和差示扫描量热仪(DSC)对其热稳定性进行了研究。结晶温度(Tc)随h-BNNs用量的增加而升高,并观察到h-BNNs成核剂对PP结晶的影响。纯PP的氧化诱导时间(OIT)从8.84 min增加到17.82 min。结果表明,h-BNN含量对所研究的纳米复合材料的热氧化稳定性有相当大的影响。PP-hBNN纳米复合膜的流变学和力学性能也随颗粒负载比的变化而变化。最佳颗粒含量提供最佳的热,机械和流变性能被发现是3%重量。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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