Interfacial characteristics of poly(ε‐caprolactone)‐grafted‐halloysites nanotubes bionanocomposites,Polymer Engineering and Science

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Interfacial characteristics of poly(ε‐caprolactone)‐grafted‐halloysites nanotubes bionanocomposites
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-11-10 , DOI: 10.1002/pen.25583
Nouha Ghorbel ₁ , Mustapha Raihane ₂ , Mohammed Lahcini _{2,

3} , Ali Kallel ₁

Affiliation

Dielectric and thermal characterization of nanohybrid films based on poly(ε‐caprolactone) biopolymer were investigated. Nano‐composites samples with distinct loadings of halloysite nanotubes (HNT) were prepared by in situ Ring Opening Polymerisation of ε‐caprolactone. The effect of the incorporated HNT on the molecular relaxation process and interfacial polarization of PCL was studied via broadband dielectric spectroscopy (BDS) on a frequency domain starting from 1E‐1 to 1E6 Hz and at temperatures ranging from −70°C to 50°C. The BDS measurements revealed four significant dielectric processes α‐primary relaxation attributed to glass transition, β‐secondary relaxation and two interfacial polarizations due to the semi‐crystalline character of PCL and the added HNT fillers. According to our results, the weight ratio of HNT ranging between 3% and 5% is recommended for achieving the highest performing nanocomposite that can be used in several applications.

中文翻译：

聚（ε-己内酯）接枝的卤化物纳米管纳米复合材料的界面特性

研究了基于聚（ε-己内酯）生物聚合物的纳米杂化薄膜的介电和热表征。通过ε-己内酯的原位开环聚合制备了具有不同负载埃洛石纳米管（HNT）的纳米复合材料样品。通过宽带介电谱（BDS）在从1E-1到1E6 Hz的频域以及-70°C到50°C的温度范围内研究了掺入的HNT对PCL分子弛豫过程和界面极化的影响。BDS测量显示出四个重要的介电过程-玻璃转变引起的主要弛豫-β由于PCL的半结晶特性和添加的HNT填料，导致二次弛豫和两个界面极化。根据我们的结果，建议HNT的重量比在3％和5％之间，以实现可以在多种应用中使用的最高性能的纳米复合材料。

更新日期：2020-11-10

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