Nanofibrous sunscreen

Lee, Byeoungjun; Lee, Hyun–Woo; Park, Chan; Hong, Sunguk; Jung, Hyun Suk; Kim, Hyonguk; Cho, Seong Jin

doi:10.1039/d2tc00933a

Cited by 4 publications

(3 citation statements)

References 36 publications

(32 reference statements)

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“…That is, certain elements with higher activities tend to cluster during atomic arrangement. [ 48,49 ] Activity calculations were conducted to investigate the effect of the Mo and Ni contents on the Mo activity. The Mo activity was calculated using Thermo‐Calc 2023a.…”

Section: Discussionmentioning

confidence: 99%

Sigma‐Phase Distribution in 2507 Super Duplex Stainless Steel Continuous Casting Slabs

Chen,

Qiao,

Cheng

et al. 2023

steel research int.

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The sigma‐phase distribution in a 2507 super duplex stainless steel continuous casting slab is analyzed using microstructural analyses and thermodynamic calculations. The sigma phase contains high Cr and Mo contents, and precipitates along the phase boundary between austenite and ferrite and grows toward the interior of the ferrite phase in the continuously cast slab. The sigma‐phase fraction at the center of the width direction is higher than that in the one fourth width. Furthermore, the sigma‐phase fraction at the center of the thickness direction is higher than those at the upper and lower surfaces, which is due to the lower cooling rate at the center. The Brinell hardness (HB) at the center increases to 313 HB with an increasing sigma‐phase fraction. The sigma‐phase fraction at the one fourth thickness near the lower surface is higher than that at the one fourth thickness near the upper surface at the same cooling rate. Additionally, Mo and Ni are severely segregated in this zone. A higher Mo content influences the precipitation and stabilization of the sigma phase. Furthermore, Scheil–Gulliver calculations indicate that compositional segregation results in an increase in the sigma‐phase precipitation temperature range.

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Section: Discussionmentioning

confidence: 99%

Sigma‐Phase Distribution in 2507 Super Duplex Stainless Steel Continuous Casting Slabs

Chen,

Qiao,

Cheng

et al. 2023

steel research int.

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“…However, excessive exposure to solar UVR generates free-radical chemical species that may induce eyesight damage and various skin diseases such as pigmentation, aging, inflammatory disorders, and even skin cancer . Because of the growing air pollution and severe ozone depletion in the present atmosphere, solar UVR and corresponding approaches for protection have attracted more and more attention. − Because the thresholds of solar UVR dose depend on the intensity of solar UVR, skin type, and the applied protection approaches, , how to realize the visualized monitor of solar UVR is a key factor to judge the thresholds of solar UVR dose and prevent the possible damage to skin health.…”

Section: Introductionmentioning

confidence: 99%

Reversible and Photochromic Peony-Shaped Hairpin Prepared from Electrospun Hybrid Nanofibers for Visualized Solar UV Radiation Detector

Ding,

Hu,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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Because of the detrimental effects of excessive exposure to solar ultraviolet radiation (UVR) on human skin health, wearable UVR detectors have attracted more and more attention. Inspired by the artwork “Tian-tsui hair pin with flora decoration” from the Palace Museum, a reversible and photochromic peony-shaped hairpin is designed to realize the visualized detection of solar UV radiation. It is prepared via electrospinning a mixed solution containing thermoplastic polyurethanes (TPUs) and Zn-MOF@WO3 onto microfiber nonwoven fabrics (MFNFs). Because of the enhanced UV responsive and photochromic capability from Zn-MOF@WO3 as well the excellent flexibility from TPUs and MFNFs, the obtained hairpin presents an excellent photoresponsive and wearable performance. When exposed to UV radiation from sunshine, the hairpin switches from white to light blue and finally to blue with radiation time. The colors light blue and blue can be used to indicate the UV radiation doses for the synthesis of vitamin D and the induction of erythema, respectively. With the assistance of oxygen in air, the hairpin recovers to its original state after being maintained in a dark atmosphere for 12 h. Even after six cycles of exposure to UV radiation and recovery in the dark, the photochromic performance almost remains unchanged. Only a minor reduction of 5% is observed. As a traditional wearable headdress in China, the peony-shaped hairpin prepared from the hybrid nanofibers not only presents oriental elegance but also is suitable for cyclical use in the daytime to monitor UV radiation for skin health management.

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“…Short-term overexposure to solar UV radiation may induce tanning of the skin, sunburn, and eyesight damage . Whereas long-term excessive exposure to solar UV radiation can directly cause cell degenerative changes that trigger pigmentation, premature skin aging, ocular pathologies, and even skin cancers such as squamous cell carcinoma. , Traditional UV protection strategies include parasol and sunscreen, which do not allow for monitoring. − Therefore, they cannot provide any information about the solar UV radiation dose. Owing to the fact that the skin injury is caused by the solar UV radiation dose and not by the UV radiation intensity, − a wearable and UV-sensitive device is highly desired to monitor the UV radiation dose, especially during outdoor activities.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Hydrogel-Based Skin Health Monitor for Tracing Solar UV Radiation in Aqueous Environments

Hu,

Hong,

Yan

et al. 2023

ACS Appl. Polym. Mater.

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Inspired by the Chinese wood oil coating on umbrella, an ionic polymer layer is coated onto hybrid hydrogels to realize monitoring of the solar ultraviolet (UV) radiation dose in aqueous environments. The hybrid hydrogels are synthesized by introducing the photocatalyst graphitic-carbon nitride (g-C3N4) nanosheets into the radically polymerized hydrogels from the monomer di(ethylene glycol) methyl ether methacrylate (MA) and oligo(ethylene glycol) methyl ether methacrylate (MA300). Thus, g-C3N4 are physically embedded in the hydrogels. Owing to the existence of inorganic nanoparticles (g-C3N4 nanosheets) and hydrogels, the obtained hydrogels containing g-C3N4 nanosheets are named as hybrid hydrogels. Because g-C3N4 can decompose the dye methylene blue (MB) by photodegradation and the decomposition capability is correlated to the absorbed UV radiation dose from the sunshine, the solar UV radiation dose can be easily traced by the discoloration extent of dyed hybrid hydrogels. To avoid the possible dye leakage during aquatic sports activities, such as swimming in a lake or surfing in the seaside, the acetamide/zinc perchlorate hexahydrate (AC/ZPH)-based ionic polymer is coated onto the hybrid hydrogels. Owing to the combined effects of the dense structure as well as the existence of positive and negative ions in the AC/ZPH layer, the coated hybrid hydrogels present excellent resistance against dye leakage. To overcome the frangibility of the hydrogels, microfiber nonwoven fabrics (MFNF) are used as a substrate for the sensor. The obtained hybrid hydrogel-based UV radiation monitor presents excellent dye leakage resistance as well as flexibility and strength. Thus, it is very suitable for wearable devices to monitor skin health in the aqueous environment under sunshine.

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Nanofibrous sunscreen

Abstract: We introduce a new type of nanofibrous sunscreen solution that is applied via a novel portable electrospinning system. This UV skin protection is highly waterproof, dust-resistant, and biocompatible while being highly breathable and skin-conformable.

Cited by 4 publications

References 36 publications

Sigma‐Phase Distribution in 2507 Super Duplex Stainless Steel Continuous Casting Slabs

Sigma‐Phase Distribution in 2507 Super Duplex Stainless Steel Continuous Casting Slabs

Reversible and Photochromic Peony-Shaped Hairpin Prepared from Electrospun Hybrid Nanofibers for Visualized Solar UV Radiation Detector

Hybrid Hydrogel-Based Skin Health Monitor for Tracing Solar UV Radiation in Aqueous Environments

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