Sulfur nanoparticles transform montmorillonite into an inorganic surfactant applicable in thermoplastics processing

László Mérai, T. Rajkumar, László Janovák, András Sápi, Imre Szenti, László Nagy, Tamás Molnár, István Bíró, József Sárosi, Ákos Kukovecz, Zoltán Kónya

Research output: Contribution to journalArticle

Abstract

We report on the modification of montmorillonite (MMT) with sulfur nanoparticles (S NPs) that yields a MMT/S nanocomposite exhibiting surfactant-like amphiphilic behavior at 80:20 MMT:S weight-to-weight ratio. The new material was successfully used as an inorganic surfactant for the dispergation of carbon black (CB) in High-Density Polyethylene (HDPE). Both the novel inorganic surfactants and the HDPE-based nanocomposite products were characterized rigorously by XRD, TGA-DSC, SEM, TEM, zeta potential measurement, static contact angle measurement, tensile strength analysis, particle charge measurement, and X-ray micro-computed tomography. It was found that the presence of 0.5 wt% MMT/S has no adverse effects on HDPE product quality. On the contrary, the MMT/S additive improves the homogeneity of the distribution of CB particles in the HDPE matrix, which is very important because of the UV stabilization properties of CB. The industrial relevance of this finding is that it demonstrates how the right composite of two cheap and readily available inorganic materials can improve the properties of one of the most widely used thermoplastics.

Original languageEnglish
Article number106419
JournalPolymer Testing
Volume85
DOIs
Publication statusPublished - May 2020

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Keywords

  • High-density polyethylene
  • Inorganic surfactant
  • Melt blending
  • Montmorillonite
  • Sulfur
  • Tensile strength

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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