Biocompatible nanocomposite production <i>via</i> nanoclays with diverse morphology

Donmez, Fatma; Kandemir, Ayse Cagil; Can, Hatıce Kaplan

doi:10.1080/1023666x.2022.2029998

Cited by 5 publications

(20 citation statements)

References 37 publications

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“…In the case of tubular nanoclays; the only study focusing on HNT reinforcement in PVP matrix, is a previous study of the authors. [26] This study confirms that, thanks to the hydrophilic interactions of HNT surface and PVP chains; high-dispersion quality was possible which in turn resulted in enhanced thermal stability. Additionally, in the same study thermal stability was further improved, when HNT surface was modified with 3-aminopropyltriethoxysilane (APTS).…”

Section: Introductionsupporting

confidence: 78%

“…First, 5 wt%, 10 wt%, 20 wt% and 40 wt% HNT implemented PVP nanocomposites were prepared in water‐solvent based eco‐friendly route, which could be seen in detail in the previous study of the authors. [ 26 ] In order to observe the organic modification influence on mechanical properties, 3‐aminopropyltriethoxysilane (APTS) functionalized HNTs were added in PVP matrix by 5 wt% and 10 wt% ratios. TEM image of the 10 wt% Halloysite/PVP nanocomposite proves both the existence and intercalation of Halloysite silicate layers within the PVP matrix (Figure 7).…”

Section: Resultsmentioning

confidence: 99%

“…APTS modification of HNT was also carried out, details of which are given in the previous study of authors. [ 26 ]…”

Section: Methodsmentioning

confidence: 99%

“…APTS modification of HNT was also carried out, details of which are given in the previous study of authors. [26] The blending of LDPE either with PVP or PVPcomposites was accomplished on a hot plate at 150 C, followed by the step of softening the dough-like samples for half an hour. Subsequently, the blends were transferred to the barrel of injection mold, which was preheated to 130 C. In the last stage of the production, the samples, which were softened in the cylinder by means of the piston using argon gas as the driving force, was injected into the mold at 50 C. The cooled samples having the dimensions of 80 Â 4 Â 1 Â cm were removed from the mold to be exposed to mechanical tests.…”

Section: Blend and Composite Productionmentioning

confidence: 99%

“…First, 5 wt%, 10 wt%, 20 wt% and 40 wt% HNT implemented PVP nanocomposites were prepared in water-solvent based eco-friendly route, which could be seen in detail in the previous study of the authors. [26] In order to observe the organic modification influence on mechanical properties, F I G U R E 7 TEM image of 10 wt% Halloysite/PVP nanocomposite.…”

Section: Nano-scaled Reinforcement: Hnt Nanocompositesmentioning

confidence: 99%

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Design and fabrication of polymer micro/nano composites with two‐level mechanical reinforcing procedure

et al. 2022

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Section: Introductionsupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

“…APTS modification of HNT was also carried out, details of which are given in the previous study of authors. [ 26 ]…”

Section: Methodsmentioning

confidence: 99%

Section: Blend and Composite Productionmentioning

confidence: 99%

Section: Nano-scaled Reinforcement: Hnt Nanocompositesmentioning

confidence: 99%

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Design and fabrication of polymer micro/nano composites with two‐level mechanical reinforcing procedure

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

2022

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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

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Biocompatible organic coating fabrication via polymer/clay nanocomposites: Evaluation of mechanical improvements

Kandemir,

Donmez,

Can

2023

Polymer Composites

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This study focuses on achieving mechanical enhancements in biocompatible organic coatings. A solvent‐based method is employed to produce biocompatible nanocomposites using polyvinylpyrrolidone (PVP) and bentonite nanoclays (BNT) as constituents to achieve this objective. Subsequently, the nanocomposites are spin‐coated onto a glass substrate, resulting in smooth and defect‐free films with a thickness of 5 μm. Through instrumented‐indentation testing, it is observed that BNT reinforcement leads to significant improvements in mechanical properties. Specifically, the addition of 0.5, 1, and 5 wt% of BNT in PVP results in enhancements of 105%, 77%, and 430% in elastic modulus, respectively, while hardness is improved by 166%, 211%, and 448%, respectively. The considerable improvements in the composite modulus cannot be adequately explained by assuming perfect adhesion between the constituents of the composite (as suggested by the Halpin–Tsai model) or by considering the contributions from the interface/network of silicate layers (as proposed by the Modified Halpin–Tsai model). Instead, the significant enhancements in hardness and modulus values are primarily attributed to a notable increase in the BNT volume fraction, ranging from 4 to 9 times, occurring under the Berkovich tip due to the aggregated silicate layers. The findings highlight the role of aggregated silicate layers in enhancing both hardness and modulus and contribute to the development of advanced biocompatible coatings with improved mechanical properties.Highlights Enhanced mechanical properties in biocompatible coatings. Biocompatible nanocomposites of polyvinylpyrrolidone (PVP) and bentonite nanoclays (BNT). Spin‐coated nanocomposite films on glass: smooth, defect‐free, 5 μm thick. BNT reinforcement boosts elastic modulus and hardness of PVP. Aggregated silicate layers under compression drive substantial mechanical improvements.

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Biocompatible nanocomposite production via nanoclays with diverse morphology

Cited by 5 publications

References 37 publications

Design and fabrication of polymer micro/nano composites with two‐level mechanical reinforcing procedure

Design and fabrication of polymer micro/nano composites with two‐level mechanical reinforcing procedure

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

Biocompatible organic coating fabrication via polymer/clay nanocomposites: Evaluation of mechanical improvements

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