Texturing commercial epoxy with hierarchical and porous structure for robust superhydrophobic coatings

Jia, Shanshan; Deng, Songlin; Luo, Sha; Qing, Yan; Yan, Ning; Wu, Yiqiang

doi:10.1016/j.apsusc.2018.10.017

Cited by 62 publications

(23 citation statements)

References 57 publications

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“…The superhydrophobic coating was fabricated via an efficient pathway according to previous research. 32 First, 2 mg of HT-LNS powder was placed into 4 mL of ethanol using ultrasonic dispersion for 30 min, followed by the introduction of 2 mg of F 13 -TMS with magnetic stirring (600 rpm) for 1 h at room temperature to modify the HT-LNS. This was proceeded by the addition of 4 mg of epoxy and curing agents (the weight ratio of epoxy to curing agents is 1:1) to the mixture for another 30 min, thus obtaining the superhydrophobic adhesive homogeneous reactant solution.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Preparation and Formation Mechanism of Covalent–Noncovalent Forces Stabilizing Lignin Nanospheres and Their Application in Superhydrophobic and Carbon Materials

Wang

Xiong

Tan

et al. 2021

ACS Sustainable Chem. Eng.

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Self-assembled lignin nanospheres (LNS) have attracted much attention due to the new opportunities provided for the preparation of value-added products derived from lignin. However, the internal connections of the LNS generally depend on weak intermolecular forces, leading to low solubility resistance and thermostability. In this study, we present a simple method for the fabrication of covalent–noncovalent forces stabilizing lignin nanospheres (HT-LNS) through utilizing the natural characteristic that lignin molecules undergo irreversible condensation under high-temperature stimulation. Experiments demonstrated that the action of temperature resulted in the fracture of β-O-4 ether and Cα–Cβ bonds, as well as hydroxyl and −OCH3 lignin molecule groups, leading to the formation of free radicals in the LNS. In addition, a large number of adjacent intramolecular and intermolecular radicals almost simultaneously generated chemical cross-linking via α-5, β-5, β–β′ bonds, and so forth. The amount of lignin molecules participating in the cross-linking reaction increased with temperature, which gradually reduced the HT-LNS diameter from 597 to 477 nm and enhanced the maximum decomposition peak from 367.7 to 395.1 °C. The solubility of nanospheres in ethanol and tetrahydrofuran (THF) decreased from 93.92 to 10.39% and from 98.09 to 22.45% with increasing treatment temperature, respectively. The HT-LNS can be employed in the preparation of superhydrophobic coatings, replacing non-environmentally friendly silica nanoparticles. The water contact and slide angles were determined as 151.9 ± 1.4 and 9.4 ± 0.5°, respectively. Moreover, the application of HT-LNS for the preparation of lignin-based carbon nanospheres maintained a perfect spherical structure with tiny graphitic area and the content of carbon atoms reached up to 94.99%. This study provides a simple and effective technology platform for the development of green materials.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Preparation and Formation Mechanism of Covalent–Noncovalent Forces Stabilizing Lignin Nanospheres and Their Application in Superhydrophobic and Carbon Materials

Wang

Xiong

Tan

et al. 2021

ACS Sustainable Chem. Eng.

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“…For example, fluorosilane-modified silica nanoparticles have been used in combination with epoxy resin to create an artificial superhydrophobic surface. The nanoscale particles helped to achieve a hierarchical structure with a low surface energy (Jia et al, 2019 ). Recently, a dual-scale modification was carried out on a melamine sponge to create a combination of superhydrophobic and superoleophilic properties (Lv et al, 2019 ).…”

Section: Separation Of Oil/water Mixturesmentioning

confidence: 99%

Surface Engineering of Ceramic Nanomaterials for Separation of Oil/Water Mixtures

et al. 2020

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Oil/water mixtures are a potentially major source of environmental pollution if efficient separation technology is not employed during processing. A large volume of oil/water mixtures is produced via many manufacturing operations in food, petrochemical, mining, and metal industries and can be exposed to water sources on a regular basis. To date, several techniques are used in practice to deal with industrial oil/water mixtures and oil spills such as in situ burning of oil, bioremediation, and solidifiers, which change the physical shape of oil as a result of chemical interaction. Physical separation of oil/water mixtures is in industrial practice; however, the existing technologies to do so often require either dissipation of large amounts of energy (such as in cyclones and hydrocyclones) or large residence times or inventories of fluids (such as in decanters). Recently, materials with selective wettability have gained attention for application in separation of oil/water mixtures and surfactant stabilized emulsions. For example, a superhydrophobic material is selectively wettable toward oil while having a poor affinity for the aqueous phase; therefore, a superhydrophobic porous material can easily adsorb the oil while completely rejecting the water from an oil/water mixture, thus physically separating the two components. The ease of separation, low cost, and low-energy requirements are some of the other advantages offered by these materials over existing practices of oil/water separation. The present review aims to focus on the surface engineering aspects to achieve selectively wettability in materials and its their relationship with the separation of oil/water mixtures with particular focus on emulsions, on factors contributing to their stability, and on how wettability can be helpful in their separation. Finally, the challenges in application of superwettable materials will be highlighted, and potential solutions to improve the application of these materials will be put forward.

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“…These unique infiltration phenomena have attracted the attention of the scientific community. Numerous studies have focused on this unique surface with a contact angle of >150° and a rolling angle of <10° [ 1 , 2 , 3 , 4 , 5 ]. Various methods for preparing superhydrophobic surfaces have been developed via extensive research, including the sol-gel [ 6 , 7 ], layer-by-layer self-assembly [ 8 , 9 ], and chemical vapor deposition methods [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Stable POSS-Based Superhydrophobic Textiles Using Thiol–Ene Click Chemistry

Wang

Xing

et al. 2022

Polymers

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In this study, a superhydrophobic fabric was synthesized by modifying the fiber’s surface with dopamine-containing hydroxyl functional groups. Furthermore, we introduced mercapto-based functional groups by the hydrolysis of mercaptopropylmethyldimethoxysilane (MPMDS) and finally grafted POSS and mercaptans using a thiol–ene click reaction. These processes generated a superhydrophobic fabric with a static contact and a sliding angle of 162° and 8°, respectively. The superhydrophobic fabric’s compact and regular micro-nano rough structure based on POSS and mercaptans provides stable fastness and durability, as well as high resistance to organic solvents, acid–base environments, mechanical abrasion, UV rays, and washing. Moreover, it can be used for self-cleaning and oil–water separation, and it has a wide range of applications in the coating industry.

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Texturing commercial epoxy with hierarchical and porous structure for robust superhydrophobic coatings

Cited by 62 publications

References 57 publications

Preparation and Formation Mechanism of Covalent–Noncovalent Forces Stabilizing Lignin Nanospheres and Their Application in Superhydrophobic and Carbon Materials

Preparation and Formation Mechanism of Covalent–Noncovalent Forces Stabilizing Lignin Nanospheres and Their Application in Superhydrophobic and Carbon Materials

Surface Engineering of Ceramic Nanomaterials for Separation of Oil/Water Mixtures

Preparation of Stable POSS-Based Superhydrophobic Textiles Using Thiol–Ene Click Chemistry

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