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首页> 外文期刊>Journal of Applied Polymer Science >Combination of cellulose nanofibers and chain-end-functionalized polyethylene and their applications in nanocomposites
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Combination of cellulose nanofibers and chain-end-functionalized polyethylene and their applications in nanocomposites

机译：纤维素纳米纤维和链末官能化聚乙烯的组合及其在纳米复合材料中的应用

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In this study, nanofiber cellulose (NFC) based on a 2,2,6,6-tetramethylpiperidine-1-oxyl radical oxidization method was successfully combined with chain-end-functionalized polyethylene containing alkoxysilane via silanization. Fourier transform infrared spectroscopy, transmission electron microscopy, contact angle measurements, Molau tests, and X-ray photoelectron spectroscopy analyses provided further evidence for the effectiveness of the surface modifications. The hydrophilic surface characteristics of NFC were changed to apparently hydrophobic for the modified nanofiber cellulose (M-NFC). Then, the linear low-density polyethylene (LLDPE)/M-NFC nanocomposite was prepared, and the mechanical properties, thermal properties, and crystallization properties of the LLDPE-M-NFC were investigated by tensile testing, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. The results show that after modification, the thermal stability of NFC was enhanced. The interface between M-NFC and the matrix was good. The tensile strength and Young's modulus values of the nanocomposites were enhanced compared with those of LLDPE; in particular, the tensile strength and Young's modulus of the blend with 5 wt % M-NFC increased by 56 and 106%, respectively. The storage modulus of the nanocomposites was enhanced obviously over a wide temperature range. The addition of a small amount of M-NFC had slight effects on the crystallinity and melting temperature of LLDPE. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45387.
机译：在该研究中，基于2,2,6,6-四甲基哌啶-1-氧基自由基氧化方法的纳米纤维纤维素（NFC）通过硅烷化成功与含有烷氧基硅烷的链末官能化聚乙烯组合。傅里叶变换红外光谱，透射电子显微镜，接触角测量，摩洛试验和X射线光电子能谱分析提供了表面改性的有效性的进一步证据。改变NFC的亲水性表面特征以显然疏水的改性纳米纤维纤维素（M-NFC）。然后，制备线性低密度聚乙烯（LLDPE）/ M-NFC纳米复合材料，通过拉伸试验，热重分析，差示扫描量热法研究了LLDPE-M-NFC的机械性能，热性能和结晶性能，和动态机械分析。结果表明，改性后，增强了NFC的热稳定性。 M-NFC和矩阵之间的界面很好。与LLDPE的那些相比，纳米复合材料的拉伸强度和杨氏模量值增强;特别地，具有5wt％M-NFC的共混物的拉伸强度和杨氏模量分别增加了56％和106％。在宽温度范围内显着增强纳米复合材料的储存模量。添加少量M-NFC对LLDPE的结晶度和熔化温度有轻微影响。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2017,134,45387。

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