INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yinjie Ma,Ping Wang,Qingmiao Wang,Fengmei Ding
Aqueous emulsion polymerization prepared a nano-SiO 2 polyacrylate fluorine-free anti-fouling finishing agent in this study. The finishing agent was prepared by copolymerizing nano-SiO 2 modified by KH-570 silane coupling agent with 3-[Tris(trimethylsilyloxy)silyl]propyl methacrylate (M3T) and stearyl methacrylate (SMA). The polymer emulsion has a uniform particle size distribution and can meet the use temperature below 160 °C. It also has good stability under solid acid/alkali conditions. The prepared anti-fouling finishing agent was applied to the cotton fabric by a two-dip and two-roll finishing process, and a polymer film containing nanoparticles can form on the surface of the cotton fiber. The experimental results showed that the finished cotton fabric’s apparent roughness increases, making it superhydrophobic. The water contact angle of the finished cotton fabric is 159 °, and it is still not lower than 150 ° after 10 washing cycles and 50 abrasion cycles. At the same time, it also has an excellent water-repellent function, and the spray test score reaches 100 (iSO-5). In addition, the coffee grounds sprinkled on the surface of the finished cotton fabric can roll off with the droplets, showing its self-cleaning ability. Most importantly, it has a specific anti-vegetable oil function because common vegetable oil can stay on its surface for 5 min without thoroughly wetting. It is worth noting that the preparation process is economical, environmentally friendly, and fluorine-free.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaolu You,Hongbo Wang,Jianxin He,Kun Qi
Waterproof and breathable microporous membranes with superhydrophobic properties have significant applications in numerous fields, including self-cleaning, outdoor protective equipment, and corrosion prevention. However, creating an environmentally friendly, fluorine-free, and waterproof breathable membrane (WBM) that offers excellent water resistance and durable superhydrophobic surfaces without post-coating technology remains a great challenge. Herein, we provide a facile and powerful method to fabricate a superhydrophobic, fluorine-free composite polyurethane (PU) WBM. This WBM is based on a corncob-like substrate membrane combined with a lotus-leaf-like surface layer with differing surface wettability; it is achieved via a two-step electrospinning and heat treatment technique. A corncob-like substrate membrane with excellent water resistance was prepared owing to its improved surface wettability and small pore size. It features a uniform hierarchical rough structure achieved by introducing appropriate SiO 2 nanoparticles (SiO 2 NPs) and two-component liquid silicone rubber (rPDMS) with low surface energy. In addition, a lotus-leaf-like skin layer with the presence of SiO 2 rough microspheres was introduced on a corncob-like membrane’s surface for imparting superhydrophobicity to the double-layer WBM. Importantly, rPDMS not only acted as a hydrophobic agent synergizing with SiO 2 NPs to enhance the wettability of the fiber surface from hydrophobic to superhydrophobic but also served as an adhesive to firmly fix SiO 2 NPs to the fiber surface. The resulting double-layer composite membrane exhibited excellent waterproofness of 93.3 kPa, moderate breathability of 5235 g m −2 d -1 , and durable self-cleaning properties, indicating its great potential for use in protective clothing and other applications.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Binbin Zhang,Mengying Qiao,Guojun Ji,Baorong Hou
Due to their unique interface functions, superhydrophobic materials have a wide range of applications. However, the majority of current superhydrophobic surfaces are designed and manufactured using fluorinated chemical reagents. Moreover, high temperature water droplets with lower surface tension easily pinning to the surface, resulting in interfacial property failures. To overcome these deficiencies, herein we fabricated a superhydrophobic bilayer coating on Q235 carbon steel based on fluorine-free chemicals of polydimethylsiloxane (PDMS) and hexadecyltrimethoxysilane modified aluminum oxide nanoparticles (Al 2 O 3 @HDTMS). Field-emission scanning electron microscopy (FE-SEM), Energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Contact angle meter, and Electrochemical impedance spectroscopy (EIS) techniques were utilized to characterize the constructed superhydrophobic bilayer coating. The results show that the superhydrophobic bilayer coating exhibits non-wetting, anti-fouling and self-cleaning capacities towards various solid and liquid pollutants. The superhydrophobic bilayer coating possesses superior anti-corrosion and weather resisting properties with |Z| 0.01Hz and R ct values increased by more than eight orders of magnitude, withstanding 720 h accelerated salt-spray and 50 days outdoor atmospheric corrosion attack. Furthermore, the superhydrophobic bilayer coating features super-repellency towards water droplets in a wide temperature range (30 ∼ 90 °C) and accompanied with high mechanical stability against continuous sandpaper abrasion and tape-peeling cycles.
研究领域:
材料科学
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表面工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Youjie Sheng,Shanwen Zhang,Die Hu,Li Ma,Yang Li
Nanoparticles (NPs) have shown promising applications in developing the novel environmental-friendly firefighting foams. Hydrophilic silica NPs, siloxane surfactant (CoatOsil-77), and hydrocarbon surfactant (BS-12) were used to prepare mixed foam dispersions. The adsorption between surfactant molecules and NPs, and foamability of the mixed dispersions were analyzed. Thermal stability of foam was evaluated by using foam drainage, coarsening, and volume decay under thermal radiation. The strengthening mechanism of NPs on thermal stability of foam was analyzed. Results indicate that the intense interaction exists between NPs and surfactants. The presence of NPs with a concentration below 1 wt% leads to the deterioration of foam stability by accelerating foam drainage and coarsening, while a concentration of NPs above 1.5 wt% enhances foam stability. The foam coarsening, drainage, and foam volume decay were obviously delayed by NPs under thermal radiation. This research can give theoretical guidance for NP application in invention of fluorine-free firefighting foams.
研究领域:
材料科学
·
消防工程
✓ 已验证
DOI
高影响因子
Advanced Science
·
2020
·Vol. 7
·期 10
·1903680
·
IF 15.84
Sin-Yi Pang,Weng-Fu Io,Lok-Wing Wong,Jiong Zhao,Jianhua Hao
Owing to their high robustness and conductivity, 2D transition metal carbides and nitrides known as MXenes are considered as a promising material class for electrochemical catalysis, energy conversion, and storage applications. Nevertheless, conventional hazardous fluoride-based synthesis routes and the intense intralayer bonding restrict the development of MXenes. Herein, a fluoride-free, facile, and rapid method for synthesizing self-assembled 1D architecture from an MXene-based compound is reported. The MXene nanowire (NW) not only provides a robust connection to the flexible substrate but also effectively increases the electrochemically active surface area. The kinetics-favorable structure yields a boosted performance for the hydrogen/oxygen evolution reaction and the intake of the zinc ion. The 1D NW based on MXene compound maintains high stability in a quite low overpotential of 236 mV for 24 h without detachment from the substrate and manifests an exceptional high-power density of 420 W kg −1 over 150 cycles as a flexible aqueous zinc ion battery. This work paves a novel and non-toxic synthesis method for the 1D nanofiber structure from MXene composition and demonstrates its multifunctional applications for energy conversion and storage.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2019
·
IF 4.384
Xiaoyang Yu,Ning Jiang,Xuyang Miao,Fan Li,Jiyun Wang,Ruowen Zong,Shouxiang Lu
The application of fluorocarbon surfactants in fire-fighting foam has been restricted due to their serious environmental hazards. Thus, it is necessary to develop the fluorine-free foam for fire-fighting and understand their characteristics from different perspectives compared with the fluorinated foam. The present study investigated foam stability, oil-film interaction, and fire extinguishing performance for fluorine-free and fluorinated foams. The results show that the adverse effect of oil on the stability of fluorinated foams is much less than that of fluorine-free foams. Besides, the trends in foam stability are not predicted by the entering, spreading, and bridging coefficients based on the measurement of surface and interfacial tensions. The differences in stability of fluorine-free and fluorinated foams are found to be consistent with the observation of oil-film interaction. Oil droplets destabilize the fluorine-free film by spreading over the film, whereas they tend to be rapidly expelled out of the fluorinated film in the form of oil lenses slightly affecting the film stability. Since the film is unstable in contact with oil, the fluorine-free foam cannot suppress the pool fire effectively at the expansion ratio of 6.8–7.2. By adjusting the foam expansion ratio, the fire extinction performance of the fluorine-free foam can be comparable to that of the fluorinated foam, and the burnback performance is significantly enhanced.
研究领域:
消防工程
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表面化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Bobo He,Xiao Hou,Yufei Liu,Jiankun Hu,Lina Song,Zheming Tong,Xiaoli Zhan,Yongyuan Ren,Quan Liu,Qinghua Zhang
Hydrophobic functionalized coatings have attracted widespread attention in fabric finishing fields, which exhibit breathable properties and can significantly enhance wearer comfort. However, the inadequate hydrophobic durability of inorganic coating and poor biologically safety of fluorine-containing coatings limited the further development of fabric finishing coating, thus it remains a significant challenge to develop fluorine-free and durable fabric finishing coating. In this study, a glyceryl monostearate (GMO)-modified fluorine-free waterborne polyurethane (WPU) emulsion (WSiPU) was synthesized and applied as a hydrophobic coating on different type of fabrics successfully. The optimal additive amount of GMO was determined by investigating the particle size and size distributions of the emulsions, solvent swell rates, wettability of water and oil on the coatings, and hydrophobicity . Cotton fabric treated with optimized WSiPU 8 emulsion exhibited excellent hydrophobicity, durability, reusability, solvent resistance, breathability, and bio-safety. Furthermore, clothing and gloves treated with WSiPU 8 emulsion exhibited excellent water repellency under flowing water and after soaking in sewage. The treated cotton fabric showed excellent hydrophobicity (water contact angle > 140°), durability (>50 resistance cycles of abrasion and laundry), and self-cleaning performance. The findings of this study provided novel insights for various applications such as oil–water separation and hydrophobic coatings.
研究领域:
材料科学
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纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xiankun Wu,Min Li,Xiaolong Chen,Pengfei Xiong,Huihui Gao,Haonan Li,Shujun Zhao,Zhongkai Wang,Zhong Wang
Given the rapid advancements in ocean engineering, wind power generation, and related fields, it is imperative to develop highly integrated coatings characterized by robust mechanical toughness, efficient self-healing capabilities, and self-cleaning functionalities to prolong the service life of the equipment. However, a formidable challenge encountered in self-healing coatings arises from the inadequate interfacial interaction between the polymer and the substrate, which results from the rapid segmental movement of molecular chains. Furthermore, the integration of multiple functionalities (such as liquid repellency, adhesive capability, scratch resistance, etc.) within self-healing coatings poses a constraint on current development efforts. Herein, we developed a method for preparing fluorine-free biobased water-repellent coatings using eco-friendly plant oils and eugenol. The obtained coatings exhibit excellent intrinsic mechanical performance and extraordinary room temperature autonomous healing efficiency. Remarkably, the coatings also provided unprecedented interfacial strength (shear strength: 11.82 MPa, peeling strength: 1841.4 N m–1) and stable adhesion performance even under water. This judicious design strategy offers a versatile and scalable approach to producing multifunctional coatings and devices tailored for desired functionalities in demanding service conditions. The coatings find application in sustainable antifouling, electronic device protection, and biomedical fields.
研究领域:
材料科学
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海洋工程
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1257
·
IF 3.4
Xin Weng,Na Lin,Wenting Huang,Minghua Liu
Molded pulp is considered an alternative to plastic packaging for its low cost, recyclability and non-pollution characteristics. However, the range of its applications has been limited by hydrophilicity and lipophilicity. Presented herein is a facile and straightforward method for the preparation biodegradable water- and oil-repellant for molded pulp. Sodium alginate-based oil repellent and PDMS-based water repellent were prepared by cross-linking and modification. The two were then mixed in various ratios to obtain compound water- and oil-repellent, which was applied to the molded pulp by dip-coating. The coated paper demonstrated excellent oil resistance (with a kit rating of 11/12) and outstanding water resistance (with a water contact angle of 121.9° and water absorption of 25.8%). This novel, eco-friendly, water- and oil-resistant molded pulp coating prepared from biodegradable and food-contactable materials is a potential candidate to replace petroleum-based coatings and has excellent possibilities to be manufactured on a large-scale intended for food and non-food contact applications.Keywords:water resistant;oil resistant;molded pulp coating;fluorine-free;sustainable packaging;barrier property
研究领域:
材料科学
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环境科学
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Chemical Reactor Engineering
·
2022
·Vol. 20
·期 12
·1283-1295
·
IF 1.636
Junxiang Guo,Daqiang Cang,Zhixing Zhao,Youhao Yin,Zhiqiang Yang,Bateer Saiyin
Polyethylene terephthalate (PET) fabric materials are broadly applied in daily life. However, on one hand, they suffer problem of easy contamination by dust owing to their hydrophilicity, which largely reduce their lifetime. On the other hand, their inflammability will bring many potential safety hazards. Therefore, in this paper, PET fabric material with superior superhydrophobicity and flame retardance through a fluorine-free layer-by-layer (LBL) method was developed, which effectively extended its lifetime and range of applications. The LBL technique was realized through assembly of the mixed polyelectrolytes include chitosan (CS), phytic acid (PA), and ammonium polyphosphate (APP) for only two bilayers (BL), which endowed the fabric superior fire retardance. A final layer consisted of steel slag (SS) particles and octadecylamine (ODA) were further assembled onto the flame-retardant fabric, which successfully gave rise to superior superhydrophobicity with water contact angle (WCA) of 155° and water sliding angle (WSA) of 2°. Compared with the pure fabric, the limited oxygen index (LOI) values of the coated fabric were enhanced from 19.8% to 29.2%. The finally obtained fabric also showed excellent self-cleaning and anti-fouling capabilities. It could be used to highly efficiently separate various oil–water mixtures. It also could endure long-time heating treatment at high temperature of 180 °C without affecting the superhydrophobicity and flame retardance. This method was fluorine-free and made good use of waste SS particles. Such fabric was believed to find vary promising applications in water repellence, self-cleaning, flame retardance, anti-fouling, and liquid separation fields.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Xia Zhao,Miaomiao Sun,Yanping Duan,Hong Hao
Superhydrophobic CH 3 -SiO 2 and i-Bu-SiO 2 copolymer coatings containing raspberry-like micro–nanoparticles were fabricated byemulsifier-free polymerization and sol–gel methods. The morphology of the particles could be controlled by simply adjusting the reactant ratio in the initial solution. The fluoride-free CH 3 -SiO 2 copolymer and i-Bu-SiO 2 copolymer composite coatings exhibited superhydrophobicity with water contact angles (WCAs) of 151.22° and 154.85° and sliding angles (SAs) of 5.03° and 4.85°, respectively. The coatings were applied on cotton to form superhydrophobic cottons resistant to water, milk, and coffee stains. The whole procedure was carried out under a mild environment, without toxic chemicals, costly instruments, or complex production processes. These advantages could provide a large-area preparation and marketability of the coatings.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 5
·2100845
·
IF 4.402
Hao Ren,Mingchen Lu,Qingquan Tang,Xianze Yin,Luoxin Wang,Hua Wang
Waterproof and breathable membranes (WBMs) are widely applied in garment, electronics, and aerospace, however, it is challenging to fabricate WBMs by a facile and successive strategy with excellent comprehensive properties, including environmental friendliness, heat-resistance, waterproofness, breathability, and mechanical properties. Herein, a straightforward method is developed to fabricate large-sized WBMs with outstanding integrated performance by direct electrospinning of original polymerization solution from polymers of intrinsic microporosity (PIMs). As-prepared nanofibrous WBMs perform comprehensive properties with the absence of fluorine, average nanofiber diameters of 278 nm, waterproofness of 88.7 kPa, breathability of 11.2 kg m −2 d −1 , tensile strength of 4.2 MPa, and heat-resistance of 200 °C, which are superior to most of that reported fluorine-free WBMs. Most significantly, the avoidance of tedious and intermittent fabrication procedures to prepare high-performant WBMs allows the achievement of the successive production, and the high heat-resistance meets the requirement of harsh service conditions. This work not only confirms that PIMs can be a good candidate for preparing high-performant WBMs, but also paves a new version for fabricating environmental benign WBMs in a facile and successive approach.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）