Composite sepiolite/chitosan layer-by-layer coated flexible polyurethane foams with superior mechanical properties and energy absorption

Ji, Wenfei; Zhang, Qicheng; Alvarez-Borges, Fernando; Yuan, Guanjie; Duijneveldt, Jeroen S. van; Briscoe, Wuge H.; Scarpa, Fabrizio

doi:10.1016/j.compstruct.2023.117419

Cited by 7 publications

(1 citation statement)

References 46 publications

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“…Ikram et al [36] conducted research on recent advances in chitosan/graphene-based bio-nanocomposites for energetic applications. Ji et al [37] discovered composite sepiolite/chitosan layer-bylayer coated flexible polyurethane foams. The material showed outstanding mechanical and energy absorption characteristics for green packaging applications.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and In Vitro Biological Assay of Thermo-Mechanically Tuned Chitosan Reinforced Polyurethane Composites

Akram,

Shahzadi,

Zia

et al. 2023

Molecules

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The progressive trend of utilizing bioactive materials constitutes diverse materials exhibiting biocompatibility. The innovative aspect of this research is the tuning of the thermo-mechanical behavior of polyurethane (PU) composites with improved biocompatibility for vibrant applications. Polycaprolactone (CAPA) Mn = 2000 g-mol−1 was used as a macrodiol, along with toluene diisocyanate (TDI) and hexamethylene diisocyanate (HMDI), to develop prepolymer chains, which were terminated with 1,4 butane diol (BD). The matrix was reinforced with various concentrations of chitosan (1–5 wt%). Two series of PU composites (PUT/PUH) based on aromatic and aliphatic diisocyanate were prepared by varying the hard segment (HS) ratio from 5 to 30 (wt%). The Fourier-transformed infrared (FTIR) spectroscopy showed the absence of an NCO peak at 1730 cm−1 in order to confirm polymer chain termination. Thermal gravimetric analysis (TGA) showed optimum weight loss up to 500 °C. Dynamic mechanical analysis (DMA) showed the complex modulus (E*) ≥ 200 MPa. The scanning electron microscope (SEM) proved the ordered structure and uniform distribution of chain extender in PU. The hemolytic activities were recorded up to 15.8 ± 1.5% for the PUH series. The optimum values for the inhibition of biofilm formation were recorded as 46.3 ± 1.8% against E. coli and S. aureus (%), which was supported by phase contrast microscopy.

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Section: Introductionmentioning

confidence: 99%

Fabrication and In Vitro Biological Assay of Thermo-Mechanically Tuned Chitosan Reinforced Polyurethane Composites

Akram,

Shahzadi,

Zia

et al. 2023

Molecules

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Effect of expanded perlite as an environmentally friendly flame‐retardant in semi‐rigid polyurethane foam

Guliyev,

Tekin,

Bora

et al. 2024

J of Applied Polymer Sci

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The objective of the present study is to synthesize semi‐rigid polyurethane foam/expanded perlite (SrPUF/EP) composites using different amounts of EP, a natural and environmentally friendly alternative to traditional halogen‐containing flame‐retardants in a one‐step process. This study investigates the mechanical, physical, thermal, and morphological properties, as well as the flame‐retardant and smoke release behaviors of composites. The cone calorimetry test results indicated that the amounts of carbon monoxide and carbon dioxide released during combustion process decreased by 43% and 37%, respectively, in the 8% EP‐added SrPUF/EP composite (4SrPUF). The amount of char residue formed after complete combustion of 4SrPUF composite was found to be 2.7 times higher than that of pure SrPUF. In the UL‐94 test, it was observed that when 4% or more EP was added to SrPUF, the liquid dripping during combustion ceased entirely, and after complete combustion, the main structure remained in the form of char without disintegration. The flexural strength of 1SrPUF, 2SrPUF, and 3SrPUF exhibited increases of 62%, 69%, and 121%, respectively, in comparison to SrPUF (47.15 kPa). The results of this study indicate that EP has the potential to serve as an environmentally friendly and cost‐effective flame‐retardant, thereby enhancing the fire resistance properties of SrPUF.

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Vibration-damping, fire-retardant, smoke-suppressing, and anti-dripping bio-based polyurethane composites enabled by functionalized UiO-66-NH2 nanomaterials

Zhang,

Xue,

Song

et al. 2025

Composites Part B: Engineering

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Composite sepiolite/chitosan layer-by-layer coated flexible polyurethane foams with superior mechanical properties and energy absorption

Cited by 7 publications

References 46 publications

Fabrication and In Vitro Biological Assay of Thermo-Mechanically Tuned Chitosan Reinforced Polyurethane Composites

Fabrication and In Vitro Biological Assay of Thermo-Mechanically Tuned Chitosan Reinforced Polyurethane Composites

Effect of expanded perlite as an environmentally friendly flame‐retardant in semi‐rigid polyurethane foam

Vibration-damping, fire-retardant, smoke-suppressing, and anti-dripping bio-based polyurethane composites enabled by functionalized UiO-66-NH2 nanomaterials

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