Halloysite Containing Thermoset Nanocomposites via Free Radical Photocrosslinking Polymerization,Macromolecular Chemistry and Physics

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Halloysite Containing Thermoset Nanocomposites via Free Radical Photocrosslinking Polymerization
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-10-07 , DOI: 10.1002/macp.202000197
Onur Turp ₁ , Seda Bekin Acar ₁ , Kevser Ozdemir ₁ , Fatima Ezzahra Bouharras ₂ , Mustapha Raihane ₂ , Mehmet Atilla Tasdelen ₁

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Naturally occurring halloysite nanotubes (HNTs) are first functionalized by 3‐(trimethoxysilyl) propyl methacrylate and then used as nanofillers in a mixture of difunctional methacrylates (triethylene glycol dimethacrylate and bisphenol A glycerolate dimethacrylate). Upon free radical photocrosslinking of this mixture enables the in situ preparation of HNT/thermoset nanocomposites. The covalent bonding of HNT in the thermoset matrix is proven by following characteristic bands of the mixture using Fourier transformed infrared spectroscopy. Furthermore, the presence and distribution of HNT in the nanocomposites are confirmed by scanning electron microscopy with energy dispersive X‐ray spectroscopy, and transmission electron microscopy observations. In addition, a mixed morphology containing agglomerated/nonagglomerated HNTs in the thermoset matrix is also determined. Both tensile strength and elasticity modulus of nanocomposites are dramatically increased with increase in HNT loading up to 4% ratio. On the other hand, these nanocomposites exhibit higher thermal properties compared to the neat thermoset.

中文翻译：

通过自由基光交联聚合的含埃洛石的热固性纳米复合材料

天然的埃洛石纳米管（HNT）首先通过甲基丙烯酸3-（三甲氧基甲硅烷基）丙酯官能化，然后在双官能甲基丙烯酸酯（三乙二醇二甲基丙烯酸酯和双酚A甘油酸酯二甲基丙烯酸酯）的混合物中用作纳米填料。在自由基作用下，该混合物的光致交联使得能够原位制备HNT /热固性纳米复合材料。HNT在热固性基质中的共价键通过使用傅立叶变换红外光谱法跟踪混合物的特征谱带来证明。此外，HNT在纳米复合材料中的存在和分布可以通过扫描电子显微镜，能量色散X射线光谱学和透射电子显微镜观察得到证实。此外，还确定了在热固性基体中包含团聚/非团聚HNT的混合形态。纳米复合材料的拉伸强度和弹性模量都随着HNT含量的增加而显着增加，达到4％。另一方面，与纯热固性塑料相比，这些纳米复合材料具有更高的热性能。

更新日期：2020-11-04

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