Design, fabrication and characterization of silane tailored surface of halloysite based polymer nanocomposites

Abstract

In recent years, polymeric drug conjugates, nanoparticles, nanocapsules, liposomes, micelles, dendrimers, and nanogels have been gained a great attention. Organically modified layered nanoclays have become an attractive hybrid biomaterial due to their wide range of uses, which can be designed with desired properties in a wide variety of applications from industry to medicine. Functional water-soluble poly(maleic anhydride-alt-acrylic acid) [poly(MA-alt-AA)], synthesized in our previous study, was chosen for the prepare of halloysite/polymer nanocomposite. Surface modification of halloysite nanotubes (HNTs) with 3-aminopropyltriethoxysilane (APTS) was performed to obtain organic functionalized halloysite and also for better compatibility of nanotubes (NTs) with monomers. Nanocomposite were obtained by in situ solution complex-radical copolymerization via charge transfer complex under conditions of copolymerization, using pristine and APTS functionalized HNTs, acrylic acid (AA), and maleic anhydride (MA) monomers. Optimization study using different clay ratios and recipe for organic-inorganic compatibility also were carried out. Characterization studies of halloysite, modified halloysite, copolymers and the formed copolymer-HNT nanotubes were enlighten by using spectroscopic analyzes such as, Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (ATR-FTIR), High resolution Raman (HR-Raman), X-Ray Diffraction Measurements (XRD) and X-Ray Photoelectron Spectroscopy (XPS). Thermal analysis and dynamic mechanical properties were performed with Thermogravimetric Analysis (TGA) and Dynamic Mechanical Analysis (DMA), respectively. Surface morphology was also carried out by Transmission Electron Microscopy (TEM). In the light of these detailed analysis results, it can be briefly concluded that surface modification of HNT, synthesis of copolymer/HNT nanocomposites, and structural characterization successfully achieved. K E Y W O R D S3-aminopropyltriethoxysilane (APTS), complex-radical copolymerization (CTC), poly(maleic anhydride-alt-acrylic acid), polymer/halloysite nanotube, surface modification

Enhanced interfacial and tribological properties of fabric liner by constructing a MXene/HNTs/PAMAM hierarchical coating

“…15 The external surface of HNTs consisted of siloxane (Si-O-Si) groups, and the internal surface was composed of aluminol (Al-OH) groups arrays. 16 Furthermore, HNTs combined geometry of nanotubes and chemistry of kaolinite. Therefore, it was extensively applied in various oil as lubricant additives or resin and distinctly optimized their friction property.…”

“…Recently, halloysite nanotubes (HNTs), an aluminosilicate (Al 2 Si 2 O 5 (OH) 4 · nH 2 O) with natural hollow structure had been considered as the promising candidate for the lubricating nanomaterials owing to its high aspect ratio and low cost 15 . The external surface of HNTs consisted of siloxane (Si–O–Si) groups, and the internal surface was composed of aluminol (Al–OH) groups arrays 16 . Furthermore, HNTs combined geometry of nanotubes and chemistry of kaolinite.…”

Construction of core–shell‐structured halloysite nanotubes with TiO2 nanoparticles for ultra‐high‐molecular‐weight polyethylene (UHMWPE) nanocomposites with improved wear resistance

“…It has been regarded as a potential alternative to replacing carbon nanotubes for polymer reinforcement. 13,14 Recently, HNTs have been utilized as a functional filler to improve the tribological properties of polymers. [15][16][17] The introduction of HNTs contributes to the formation of tribofilm so as to improve the tribological properties of HNT/polymer composites.…”

“…Halloysite nanotube (HNT), a type of natural nanotubular clay, possesses many attractive advantages including biocompatibility, environmental friendliness, and low price. It has been regarded as a potential alternative to replacing carbon nanotubes for polymer reinforcement 13,14 . Recently, HNTs have been utilized as a functional filler to improve the tribological properties of polymers 15–17 .…”

Development of Halloysite Nanotube-Infused Thermoset Soybean Bio-Resin for Advanced Medical Packaging

“…Amino silane modification involves functionalizing the surface of the halloysite with molecules of amino silane that contain both hydrophobic alkyl chains and polar amino groups. The hydrophobic properties of the alkyl chains are compatible with the hydrophobic polymer matrix, resulting in improved interfacial adhesion and mechanical properties of the nanocomposites [ 24 , 25 , 26 , 27 ]. Different treatment methods, including silane modification, were utilized to improve the dispersibility of HNTs in the epoxy resin matrix.…”