The influence of halloysite on the physicochemical, mechanical and biological properties of polyurethane-based nanocomposites

Abstract

The impact of the addition of the nanofiller -halloysite -on the mechanical, physicochemical and biological properties of a nanocomposite, in which thermoplastic polyurethane fulfilled the role of the matrix was investigated. The nanocomposite was obtained by extrusion in three variants with 1, 2 and 3 wt % halloysite. The nanostructure of the obtained materials was confirmed using Atomic Force Microscopy (AFM). Based on the mechanical tests carried out, it was proven that the obtained nanocomposites were characterized by a tensile modulus greater than the polyurethane constituting the matrix. The density and hardness of the nanocomposites had changed within error limits compared to unmodified polyurethane. Biological tests showed no cytotoxicity of all the tested materials to normal human dermal fibroblasts (NHDF). Degradation tests were carried out in artificial plasma and showed that samples with 2 wt % halloysite addition had the best ratio of tensile strength and elongation at break to elasticity modulus.

The Influence of Zinc Waste Filler on the Tribological and Mechanical Properties of Silicone-Based Composites

“…The obtained results showed that the particles of inorganic constituents can significantly reduce the friction coefficient, even small weight fractions of the filler. The influence of filler in the form of inorganic particles on the preservation of the mechanical and physicochemical properties of polymers can be determined by changing the composition of the filler [ 33 , 34 , 35 ].…”

Influence of the Halloysite Nanotube (HNT) Addition on Selected Mechanical and Biological Properties of Thermoplastic Polyurethane

“…The 3D printing of these materials provides many advantages, including unique tailoring to a patient's needs, which is in line with the current trend of personalized medicine [27,28]. The conducted preliminary tests, including plate-tubular halloysite, proved that twin-screw extrusion provides nanocomposites with improved mechanical properties compared with the original matrix with no toxicity to normal cells [29]. The scheme of the research methodology is shown in Figure 1.…”

The Impact of Wood Waste on the Properties of Silicone-Based Composites

“…The cytotoxicity of the tested composites was obtained according to the standard procedures against model cell lines [29,30,32]. The viability and proliferation assays, such as an MTT assay, allowed for biocompatibility of different, natural, or synthetic agents assessments [32,33].…”

“…Cytotoxicity testing of composite samples according to the procedure described earlier [29,30]. Cell viability of normal human dermal fibroblasts (NHDF, Lonza) was assessed using an MTT (3-[4-5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) test.…”