International Journal of Nanoscience
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2023
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IF 0.8
Jie Yang,Jun Li,Zhantao Wei,Tao Wang,Hang Jiang,Likang Xiao,Jianghe Lan,Jiayi Zhu,Xiaoru Liu,Gang Xu,Zhipeng Gao,Zhengwei Xiong
The graded-refractive-index SiO 2 antireflective (AR) films were prepared using the sol–gel method. A monolayer with a porous nanonetwork structure was designed as the mixed volume ratio of 70:30 between the alkali- and acid-catalyzed SiO 2 sols. As the top layer, the hexamethylisilazane (HMDS) modified alkali catalyzed SiO 2 sols induced SiO 2 nanoparticles transforming from hydrophilic to hydrophobic nature. In comparison with the structures of monolayer and bilayer films, the AR properties and laser damage resistance were investigated in detail. By designing the nanostructures of the bottom and top layers, the graded- refractive-index SiO 2 film was obtained, consequently enhancing the AR performance. In the bilayer film, the transmittance reached ∼ 98%@532 nm and 97%@1064 nm, respectively, corresponding to the obvious reduction of reflectivity. The assembly of the bilayer SiO 2 film increased the laser-induced damage threshold by ∼ 30% from 25.3 J/cm 2 (monolayer) to 33.1 J/cm 2 (bilayer). The inducement of laser damage was further revealed by the analysis of morphological changes induced by laser damage, attributing to the initiator absorption of environmental contaminations. Therefore, the SiO 2 film not only provided a graded-refractive-index structure with good AR performance, but also had high laser damage resistance. The unique graded-refractive-index structure of SiO 2 AR films offers a new strategy for improving the performance of optical components in high-power laser systems.
研究领域:
光学材料
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薄膜技术
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光子学
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应用物理
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材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Zhonglong Wang,Aibi Yang,Xinyu Tan,Yiteng Tu,Sydney Sabin,Peng Xiang,Man Wang,Runhua Guo,Xiaobo Chen
Superhydrophobic (SHP) coatings have been reported with many promising applications using various nano-micro structures with surfactants of low surface energies. However, many SHP coatings have poor durability, largely limiting their practical importance. In this study, a durable SHP coating is demonstrated with a novel veil-over-sprout micro-nano structure of silica nano particles (SNP) and poly(methyl methacrylate) (PMMA). This coating displays a large water contact angle (WCA) of 168.0° and a small sliding angle (SA) of less than 1.0°. Excellent abrasion resistance is demonstrated with excellent superhydrophobicity (WCA = 159.0°) after consecutive tests with sandpaper, high-density water flow and fine sand impact. An excellent self-healing function has been achieved with this SHP coating after stored at room temperature , recovering its remarkable superhydrophobicity. Outstanding resistance against ice formation is exhibited with the starting-freezing time at −20 ℃ three times longer than uncoated surface. Strong resistance to acid and base attacks is observed even after a week of immersion in highly acidic and alkaline environments (pH 1.0–14.0), without much degradation of SHP performance. Efficiency of up to 99.9% is demonstrated in corrosion protection in a solution with pH = 10.0 to extend the life of the metal. In addition, remarkable SHP durability is demonstrated after long-term outdoor exposure. Therefore, this work has shown off a promising methods for SHP coatings towards future practical applications.
研究领域:
材料科学
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表面工程
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纳米技术
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涂层与薄膜
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Xue Fu,Shuyan Xu
Superhydrophobic coatings, inspired by lotus leaves, have gained significant interest due to their multifunctional properties. However, their mechanical wear resistance is often inadequate, resulting in a limited lifespan. This study aims to create a wear-resistant superhydrophobic composite coating using epoxy resin (EP) as a binder, along with SiO 2 modified by hexadecyltrimethoxysilane (HDTMS) and cellulose nanofibers (CNF) modified by KH570 to enhance performance synergistically. The preparation method is environmentally friendly and does not involve fluorine chemicals. A simple and efficient one-step spraying technique is employed to create a micro-nano hierarchical structure on the substrate surface. SiO 2 contributes to surface roughness, CNF serves as a toughening agent to form a three-dimensional network, and EP provides strong adhesion. This composite structure significantly improves the mechanical durability of the coating while preserving excellent superhydrophobic properties. The coating is compatible with various substrates and retains good hydrophobicity even after extensive abrasion and tape peeling. Additionally, the superhydrophobic coating demonstrates outstanding anti-fouling and self-cleaning capabilities, resistance to acids and bases, and strong adhesion. We believe this research offers innovative approaches for developing fluorine-free, wear-resistant superhydrophobic coatings.
研究领域:
材料科学
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表面工程
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纳米技术
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高分子科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Lili Zhu,Dongxing Lu,Yibing Cai,Shiqin Liao,Qingqing Wang,Qufu Wei
Radiative cooling textiles are cooled by transferring the body’s metabolic heat to outer space and reflecting sunlight, without any energy input, providing a sustainable way for personal thermal management (PTM). However, current research on the environmental adaptability of fabrics is very scarce, and most of the research on PTM has a single application environment. Here, based on the Mie scattering theory and the design of micronanostructures, this work demonstrates an environmentally adaptive fabric (EAF) composed of polyformaldehyde (POM) with a high selectivity ratio and hollow SiO2. It not only achieves the selective emission of the atmospheric window (8–13 μm) but also shows the transmission of the entire band (2.5–25 μm) and reflect sunlight (0.3–2.5 μm). Remarkably, its optical properties remain outstanding after being subjected to acid, alkaline, and UV treatments, which match the daily garment use application requirements. As a result, the EAF achieves efficient radiative cooling both outdoors (under sunny and cloudy conditions) and indoors (1.5–12.2 °C lower than cotton and commercial cooling fabrics). The EAF with excellent environmental adaptability and robustness brings new possibilities for the rational design of next-generation smart thermal management textiles and other sustainable applications.
研究领域:
材料科学
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纳米技术
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纺织工程
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热管理
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
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2024
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IF 15.8
Zhiming Wang,Meiqin Zhang,Xin Du
Hollow nanoparticles with tunable structures and spatial and chemical specificity are considered as promising carriers. However, it remains a formidable challenge to endow hollow nanomaterials with precisely controlled multisized macro/mesoporous structures up to now. This paper demonstrates a “polydopamine (PDA) expansion–shrinkage” strategy combined with a monomicelle interfacial confined assembly method to achieve the highly controllable preparation of a series of yolk@shell PDA@SiO2 composite nanoparticles with structural asymmetry and a tunable multisized pore in the shell. The strategy allows systematic manipulation of the average pore size of large slit pores in the range of 15.4–86.5 nm by adjusting the reaction temperature. Benefiting from advantages such as an asymmetric structure and multilevel porosity, they exhibit excellent performance in the applications of on-demand loading of dual-sized cargoes, dual-propelled nanomotors, and particle size-selected encapsulation and separation. These findings provide inspiration for the construction of asymmetric yolk@shell structures with tunable multisized pores for a wide range of biological and chemical applications.
研究领域:
纳米技术
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材料科学
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化学工程
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）