Photoprotective properties of alpaca fiber melanin reinforced by rutile TiO2 nanoparticles: A study on wool fabric

Liang, Yujia; Pakdel, Esfandiar; Zhang, Mingwen; Sun, Lu; Wang, Xungai

doi:10.1016/j.polymdegradstab.2018.12.006

Cited by 42 publications

(27 citation statements)

References 48 publications

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“…A range of nanoparticles are applied either directly to the surface of textile fibres or used in fibre coatings to increase their UV-shielding properties. Most continuing current research on this approach is focused on nanoparticles of zinc oxide (ZnO) [ 462 – 464 ] and titanium dioxide (TiO 2 ) [ 465 – 469 ]. All reported data confirm the efficacy of this approach in increasing UPF of fabrics.…”

Section: Materials Damagementioning

confidence: 99%

Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020

Neale

Barnes

Robson

et al. 2021

Photochem Photobiol Sci

130

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This assessment by the Environmental Effects Assessment Panel (EEAP) of the United Nations Environment Programme (UNEP) provides the latest scientific update since our most recent comprehensive assessment (Photochemical and Photobiological Sciences, 2019, 18, 595–828). The interactive effects between the stratospheric ozone layer, solar ultraviolet (UV) radiation, and climate change are presented within the framework of the Montreal Protocol and the United Nations Sustainable Development Goals. We address how these global environmental changes affect the atmosphere and air quality; human health; terrestrial and aquatic ecosystems; biogeochemical cycles; and materials used in outdoor construction, solar energy technologies, and fabrics. In many cases, there is a growing influence from changes in seasonality and extreme events due to climate change. Additionally, we assess the transmission and environmental effects of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is responsible for the COVID-19 pandemic, in the context of linkages with solar UV radiation and the Montreal Protocol.

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Section: Materials Damagementioning

confidence: 99%

Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020

Neale

Barnes

Robson

et al. 2021

Photochem Photobiol Sci

130

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“…YM was obtained from yak hair as reported in our previous work. ,,− In brief, the yak hair was immersed into acetone for washing, followed by rinsing with deionized water for several times. Afterward, the washed hair was dried in the oven at 60 °C overnight.…”

Section: Methodsmentioning

confidence: 99%

“…Melanin is a natural pigment that widely appears in animals, plants, and microorganisms . It possesses a series of unique properties and has widely been employed in different applications. ,− In particular, it has intrinsic biocompatibility and has been applied as food additives/supplements or biocompatible electrode material. , It is also considered to be an excellent photothermal agent because of its extremely fast photodynamics, which enable almost complete conversion of the energy of the absorbed photons into heat . In this regard, several studies have successfully applied both synthetic and natural melanin for photothermal therapy. ,− Furthermore, NIR-photoresponsive SMPs based on melanin/melanin-like materials have also been developed. − However, no SMP-based implantable prototypes have been developed based on melanin, and their long-term toxicity has not been explored.…”

Section: Introductionmentioning

confidence: 99%

Natural Melanin/Polyurethane Composites as Highly Efficient Near-Infrared-Photoresponsive Shape Memory Implants

Xie

Yan

Pakdel

et al. 2020

ACS Biomater. Sci. Eng.

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Natural melanin is recognized as a biocompatible photothermal agent because of its biologically derived nature and efficient photothermal conversion ability. Here, yak hair melanin (YM) is added to polyurethane (PU) for the fabrication of NIR-photoresponsive shape memory implants. The in vitro toxicity of the YM/PU composites is carried out by exposing them to human mesenchymal stem cells (hMSCs) and mouse fibroblast (L929) cells lines for 24 h, while the in vivo toxicity is investigated by implanting the YM/PU composites in the mouse for two months. No significant differences on cell viability, blood chemistry, hematology, and histological results are observed between YM/PU composites and control groups, suggesting their excellent biocompatibility. The biostability of the YM/PU composites is confirmed by monitoring their in vitro degradation for 12 weeks. The YM/PU column implanted in the back subcutis or vagina of the mouse rapidly recovered to its original state within 60 s under a very low NIR laser (808 nm, 0.5 W/cm2) intensity, which is much lower than the general laser intensity for photothermal cancer therapy (1–2 W/cm2). This work confirms the applicability of the YM/PU composites as long-term implant materials and expedites the use of YM/PU composites as cost-effective candidates for biomedical applications.

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“…There are several research publications available that indicate the UV protection of textile substrates by TiO 2 [39][40][41][42][43][44]. The UV resistance performance is measured by calculating the ultraviolet protection factor (UPF) for UVA and UVB.…”

Section: Uv Protectionmentioning

confidence: 99%

“…Liang et al [42] prepared a composite with natural pigment melanin and TiO 2 . Melanin protects the living cell from UV radiation.…”

Section: Uv Protectionmentioning

confidence: 99%

Titanium Dioxide and Its Applications in Mechanical, Electrical, Optical, and Biomedical Fields

Das¹,

Ambardekar²,

Bandyopadhyay³

2022

Titanium Dioxide - Advances and Applications

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Titanium dioxide (TiO2), owing to its non-toxicity, chemical stability, and low cost, is one of the most valuable ceramic materials. TiO2 derived coatings not only act like a ceramic protective shield for the metallic substrate but also provide cathodic protection to the metals against the corrosive solution under Ultraviolet (UV) illumination. Being biocompatible, TiO2 coatings are widely used as an implant material. The acid treatment of TiO2 promotes the attachment of cells and bone tissue integration with the implant. In this chapter, the applications of TiO2 as a corrosion inhibitor and bioactive material are briefly discussed. The semiconducting nature and high refractive index of TiO2 conferred UV shielding properties, allowing it to absorb or reflect UV rays. Several studies showed that a high ultraviolet protection factor (UPF) was achieved by incorporating TiO2 in the sunscreens (to protect the human skin) and textile fibers (to minimize its photochemical degradation). The rutile phase of TiO2 offers high whiteness, and opacity owing to its tendency to scatter light. These properties enable TiO2 to be used as a pigment a brief review of which is also addressed in this chapter. Since TiO2 exhibits high hardness and fracture toughness, the wear rate of composite is considerably reduced by adding TiO2. On interacting with gases like hydrogen at elevated temperatures, the electrical resistance of TiO2 changes to some different value. The change in resistance can be utilized in detecting various gases that enables TiO2 to be used as a gas sensor for monitoring different gases. This chapter attempts to provide a comprehensive review of applications of TiO2 as an anti-corrosion, wear-resistant material in the mechanical field, a UV absorber, pigment in the optical sector, a bioactive material in the biomedical field, and a gas sensor in the electrical domain.

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Photoprotective properties of alpaca fiber melanin reinforced by rutile TiO2 nanoparticles: A study on wool fabric

Cited by 42 publications

References 48 publications

Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020

Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020

Natural Melanin/Polyurethane Composites as Highly Efficient Near-Infrared-Photoresponsive Shape Memory Implants

Titanium Dioxide and Its Applications in Mechanical, Electrical, Optical, and Biomedical Fields

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