Preparation and characterization of biodegradable polyurethanes composites filled with silver nanoparticles-decorated graphene

Wu, Chih-Cheng; Tsou, Chi‐Hui; Tseng, Yen-Chun; Lee, Hsun-Tsing; Suen, Maw‐Cherng; Gu, Jiahao; Chiu, Shih‐Hsuan

doi:10.1007/s10965-016-1138-7

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…Additionally, many researchers have coated silver particles on inorganic substances by using physical or chemical methods, with the hope of endowing the composite materials with better physical or antibacterial properties. For example, Wu et al [ 19 ] introduced graphene sheets into PU. In addition to endowing the composite material with better thermal and mechanical properties, the introduction of the sheets also endowed the resultant composite material with antibacterial properties.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane/Nanosilver-Doped Halloysite Nanocomposites: Thermal, Mechanical Properties, and Antibacterial Properties

Sun

Tsou

et al. 2020

Polymers

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In this study, the researchers successfully embellished the surface of halloysite (Ag/HNTs) with silver using halloysite, silver nitrate (AgNO3), and polyvinylpyrrolidone (PVP). The researchers then prepared polyurethane that contained pyridine ring by using 4,4′-diphenylmethane diisocyanate (MDI) and polytetramethylene glycol (PTMG) as the hard chain segment and the soft chain segment of polyurethane (PU), as well as 2,6-pyridinedimethanol (2,6-PDM) as the chain extension agent. This was followed by the preparation of Ag/HNTs/PUs nanocomposite thin films, achieved by mixing Ag/HNTs with different ratios into polyurethane that contains pyridine ring. First, the Ag/HNTs powders were analyzed using energy-dispersive X-ray spectroscopy, X-ray diffraction, and transmission electron microscopy. Subsequently, Fourier-transform infrared spectroscopy was used to examine the dispersibility of Ag/HNTs in PU, whereas the thermal stability and the viscoelasticity of Ag/HNTs/PU were examined using thermal gravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. When the mechanical properties of Ag/HNTs/PU were tested using a universal strength tester, the results indicated a maximum increase of 109.5% in tensile strength. The researchers then examined the surface roughness and the hydrophobic ability of the Ag/HNTs/PU thin films by using atomic force microscopy and water contact angle. Lastly, antibacterial testing on Escherichia coli revealed that when the additive of Ag/HNTs reached 2.0 wt%, 99.3% of the E. coli were eliminated. These results indicated that the addition of Ag/HNTs into PU could enhance the thermal stability, mechanical properties, and antibacterial properties of PU, implying the potential of Ag/HNTs-02 as biomedicine material.

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Section: Introductionmentioning

confidence: 99%

Polyurethane/Nanosilver-Doped Halloysite Nanocomposites: Thermal, Mechanical Properties, and Antibacterial Properties

Sun

Tsou

et al. 2020

Polymers

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“…In this sense, considering polyol building blocks, enzymatic hydrolysis of the ester bond in polyester-polyols makes them more appealing for the production of biodegradable polyurethanes [6]. Thus, polyester polyols like polycaprolactone [7], polylactic acid [8], and polyacrylic or polyglycolic acids [9,10] have demonstrated not to produce toxic decomposition products. Additionally, polycarbonate polyols can also be proposed as biocompatible polyurethane precursors, as it has been shown by Zhu et al [11] when assessing the biostability of poly (1,6-hexanediol) carbonate diol-based polyurethanes.…”

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confidence: 99%

A Review of the Sustainable Approaches in the Production of Bio-based Polyurethanes and Their Applications in the Adhesive Field

2020

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On account of the irreversible environmental damage caused by the utilization of non-renewable raw materials in industrial production, since the end of the twentieth century, the interest in replacing the traditionally applied petroleum-based starting compounds in the polyurethane production by more sustainable feedstocks has grown enormously. Such pursuit of Green Chemistry has been fostered by the implementation of a set of national and international initiatives and stricter regulations, especially in the field of adhesives. In this respect, the latest advances in the production of bio-based polyurethanes are collected in this review. Thus, after a brief introduction to this subject and main tendencies towards the production of more sustainable polyurethanes, the first section reviews the feasibility of manufacturing polyurethanes from a range of natural platforms, including lignocellulosic biomass and vegetable oils, whether modified or in their original form, along with some industrial wastes. Afterwards, the hitherto considered synthetic routes for the preparation of greener polyurethanes are assessed, encompassing waterborne, radiation-curable and non-isocyanate polyurethane techniques. Finally, the last section focuses on the research advancement on the synthesis, properties and different uses of bio-based polyurethanes specifically implemented in the field of adhesives.

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Polyurethane Based Smart Composite Fabric for Personal Thermal Management in Multi‐Mode

Li,

Liao,

Cai

et al. 2024

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Textiles with thermal/moisture managing functions are of high interest. However, making the textile sensitive to the surrounding environment is still challenging. Herein, a multimodal smart fabric is developed by stitching together the Ag coated thermal‐humidity sensitive thermoplastic polyurethane (Ag‐THSPU) and the hybrid of polyvinylidene fluoride and polyurethane (PU‐PVDF). The porous PU‐PVDF layer is used for solar reflection, infrared emissivity, and water resistance. The Ag‐THSPU layer is designed for regulating thermal reflection, sweat evaporation as well as convection. In cold and dry state, the Ag domains are densely packed covering the crystalline polyurethane matrix, featuring low water transmission (102.74 g m−2·24 h−1), high thermal reflection and 2.4 °C warmer than with cotton fabric. In the hot and humid state, the THSPU layer is swollen by sweat and expands in area, resulting in the formation of micro‐hook faces where the Ag domains spread apart to promote sweat evaporation (2084.88 g/m−2·24 h−1), thermal radiation and convection, offering 2.5 °C cooler than with cotton fabric. The strategy reported here opens a new door for the development of adaptive textiles in demanding situations.

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Preparation and characterization of biodegradable polyurethanes composites filled with silver nanoparticles-decorated graphene

Cited by 7 publications

References 42 publications

Polyurethane/Nanosilver-Doped Halloysite Nanocomposites: Thermal, Mechanical Properties, and Antibacterial Properties

Polyurethane/Nanosilver-Doped Halloysite Nanocomposites: Thermal, Mechanical Properties, and Antibacterial Properties

A Review of the Sustainable Approaches in the Production of Bio-based Polyurethanes and Their Applications in the Adhesive Field

Polyurethane Based Smart Composite Fabric for Personal Thermal Management in Multi‐Mode

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