CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guoshuang Hua,Xiaoqiang Fan,Zhongpan Zhang,Cai Meng,Minhao Zhu
Hierarchical honeycomb-like polyimide (PI) composite coatings are engineered via humidity-regulated KH570 hydrolysis and high-temperature self-assembly. Controlled hydrolysis of KH570 generates uniform microspheres during thermal curing, while concurrent poly (amic acid) (PAA) imidization enables in situ microspheres encapsulation, yielding compact honeycomb-structured KH-PI composites. To mitigate the brittleness caused by the KH-PI matrix and microspheres phase separation without compromising structural integrity, Ti 3 C 2 T x MXene nanosheets are incorporated into the precursor system (forming KMX-PI). Hydrogen bonding and van der Waals interactions between Ti 3 C 2 T x MXene surface functional groups and PI chains mediate interfacial toughening, synergistically enhancing mechanical and environmental tolerance. Comprehensive characterization confirms that KMX-PI retains KH-PI's structural merits, while exhibiting superior hardness (258.0 MPa) and Young's modulus (293.47 GPa). After 4-week soaking, KMX-PI achieves an electrochemical impedance modulus (|Z| 0.01Hz ) of 1.17 × 10 9 Ω·cm 2 and reduced wear rates (1.56 × 10 −5 mm 3 ·N −1 ·m −1 ). Wear resistance arises from KH570 microspheres' rolling-sliding synergy effect and Ti 3 C 2 T x MXene's lubricating film. Corrosion resistance stems from: (i) curved pore walls delaying diffusion, (ii) microsphere barriers, and (iii) Ti 3 C 2 T x 's nanoscale labyrinth effect. This multiscale design integrates mechanical robustness and environmental resistance of polymer coatings for extreme conditions.
研究领域:
材料科学
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表面工程
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高分子材料
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腐蚀防护
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摩擦学
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纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Xiangliang Meng,Jie Zhang,Honghui Guo,Jian Gao,Wei Li,Yuling Wu,Hong Yan,BaoLong Niu
MgO/Ag nanoparticles (NPs) have been surface modified with the silane coupling agent KH-570. The modified NPs (KMA) were added to poly (butylene succinate- co -terephthalate) (PBST) to prepare the K-PMA composite films. The modification improved the compatibility between MgO/Ag NPs and PBST matrix. The study comprehensively investigated the effects of modified MgO/Ag NPs on the mechanical, antibacterial, and preservation properties of bio-nanocomposite films. The incorporation of NPs substantially improved the mechanical and barrier properties of the PBST matrix. The composite films exhibited the best overall performance when the nanoparticle content is 3 %. In particular, the elongation at break, tensile strength, and water vapor permeability ( WVP ) were 794.67 %, 32.20 MPa, and 1.53 × 10 −11 g·m/m 2 ·s·Pa, respectively. Furthermore, the K-PMA-3 composite film exhibited excellent antibacterial properties and food preservation performance. The inhibition rates against Staphylococcus aureus ( S. aureus ), Escherichia coli ( E. coli ), and Salmonella paratyphi B ( S. paratyphi B ) were all over 98 %. After 6 days of preservation experiments, the mass loss of cherry tomatoes wrapped with K-PMA-3 film was only 5.9 %, which was only 45 % of the mass loss of cherry tomatoes wrapped with PMA-3 film. The results showed that the prepared biofilms have a great potential to be used as food packaging films.
研究领域:
材料科学
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食品科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
FlatChem
·
2025
·
IF 6.2
Shulong Chen,Xijun Wang,Shengxing Wang,Huacheng Wu,Ruina Ma,An Du,Xue Zhao,Yongzhe Fan
The agglomeration of graphene in conventional silver composite plating baths significantly compromises coating homogeneity and performance. This study introduces γ-methacryloxypropyl trimethoxysilane (KH-570) as a silane coupling agent to functionalize graphene, enhancing its dispersion and interfacial adhesion with the silver matrix. Pure silve, unmodified graphene/silver (G/Ag), and KH-570-modified graphene/silver (MG/Ag) coatings were fabricated via brush plating under varying voltages (3 V, 4 V, 5 V). Systematic investigations revealed that the MG/Ag coating exhibited superior microstructural compactness, with 64% higher microhardness (HV 140) and 65% lower wear rate compared to pure Ag. Electrochemical tests in 3.5% NaCl demonstrated a one-order-of-magnitude reduction in corrosion current density (0.086 × 10 −6 A/cm 2 ) for the 4 V MG/Ag coating, alongside a hydrophobic surface (contact angle: 112°) and reduced contact resistance (0.58 μΩ). The optimized voltage of 4 V facilitated refined grain structures, minimized defects, and enhanced graphene dispersion through covalent Si O C bonding. These improvements stem from KH-570's dual role in preventing graphene agglomeration and strengthening the Ag-graphene interface. The MG/Ag coating demonstrates exceptional wear resistance, corrosion inhibition, and electrical stability, positioning it as a robust candidate for high-voltage disconnectors in harsh outdoor environments. The concentration of KH-570 used in this study is analytical reagent (AR). This work provides a scalable, eco-friendly strategy for advancing durable electrical contact materials.
✓ 已验证
DOI
高影响因子
FDMP-Fluid Dynamics & Materials Processing
·
2022
·
IF 0
Chao Wei,Zhongjin Peng,Yunfei Chen,Yanhai Cheng
Ag 3 PO 4 exhibits a high photocatalytic activity if exposed to visible light, however, it displays bottlenecks such as poor cycle-stability and mediocre ability to degrade methyl orange (MO) because of limited adsorption of MO molecules onto its surface. In this study, nano TiO 2 prepared by a one-step method was combined with Ag 3 PO 4 to form a TiO 2 @Ag 3 PO 4 heterojunction in order to improve this material both in terms of photocatalysis and photostability. After adding a KH-570 silane coupling agent, the photocatalytic performance of TiO 2 @Ag 3 PO 4 could be improved even further, with the degradation rate of MO maintained at more than 90% after three cycles of visible in light.
研究领域:
材料科学
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纳米技术
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环境科学
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化学工程
✓ 已验证
DOI
IRANIAN POLYMER JOURNAL
·
2012
·Vol. 21
·期 6
·343-352
·
IF 0.936
Wang Li,Li Xiaolong,Huang Mingfu,Xu Zushun,Yi Changfeng
The silica sol/fluoroacrylate core–shell nanocomposite emulsion was successfully synthesized via traditional emulsion polymerization through grafting of KH-570 onto silica particles. Comparing the performance of the polyacrylate copolymer, the fluorinated polyacrylate copolymer and the silica sol/fluoroacrylate core–shell nanocomposite emulsion, we can come to a conclusion that the silica sol/fluoroacrylate core–shell nanocomposite emulsion presents significantly excellent performance in all aspects. The products were characterized by Fourier transform infrared (FTIR), photon correlation spectroscopy (PCS), transmission electron microscopy (TEM), thermogravimetry (TGA), Contact angle and UV–vis analyses techniques. The chemical structure of polyacrylate copolymer, fluorinated polyacrylate copolymer and silica sol/fluoroacrylate nanocomposite were detected by FTIR. The size and stability of emulsion latex particles were determined by PCS technique. TEM analysis confirmed that the resultant latex particle has the core–shell structure, obviously. The water absorption and contact angle data also showed that the silica sol/fluoroacrylate nanocomposite film has good hydrophobic performance. TGA analysis indicated the weight loss of the silica sol/fluoroacrylate nanocomposite film begins at around 350 °C which testifies its good thermal stability. The UV–vis spectroscopy analysis showed that the silica sol/fluoroacrylate nanocomposite film possess UV–vis shielding effect when the added volume amount of KH570 modified silica sol is up to 5 mL. Therefore, the excellent properties of hydrophobicity, thermodynamics and resistance to ultraviolet provide the silica sol/fluoroacrylate nanocomposite film with potential applications in variety fields. In addition, the formation mechanism of core–shell structure silica sol/fluoroacrylate nanocomposite latex particles was speculated.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Meng Liu,Xinyu Tan,Xinyi Li,Jialin Geng,Mengmeng Han,Ke Wei,Xiaobo Chen
Superhydrophobic coatings have aroused increasing interest in many fields. However, the low light transmittance , poor mechanical robustness, and unsatisfactory chemical stability greatly limit the practical application of superhydrophobic coatings. Herein, a robust transparent superhydrophobic coating was prepared through a facile two-step dipping treatment. The coated glass displays good transparency with transmittance about 87 % in the wavelength range of 500–900 nm, remarkable superhydrophobic performance with a water contact angle of 158.8° and a sliding angle less than 1.0°. After a series of durability tests, including grit impact, etching in acidic and alkaline environments, and long-term outdoor exposure, the obtained coating can still maintain good superhydrophobic and transparency, which confirms the obtained coating has good mechanical robustness and chemical stability. Moreover, the coating exhibits good anti-icing property with a longer icing time and can maintain superhydrophobicity after 80 icing/de-icing cycles. It can be believed that such transparent superhydrophobic coating can be applied in many fields, owing to its low-cost and environmentally friendly fabrication method and its good performances in mechanical robustness and chemical stability.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Shiwei Guo,Di Wang,Junyou Shi,Xiu Li,Bin Feng,Linlong Meng,Zhaoyu Cai,Haoke Qiu,Shuangying Wei
Silica that originated from the calcination of rice husks, which is a source of biomass silicon, was added as a reinforcing agent to waterborne polyacrylate wood coatings to improve their coating performance, and especially their mechanical properties. The morphology of the rice-husk ash, aggregation and dispersion of modified silica in the polyacrylate emulsion and the surface roughness of the coating on wood were characterized by scanning electron microscopy, transmission electron microscopy and atomic force microscopy. The film mechanical properties and performance were investigated. The rice-husk ash calcined at 650 °C exhibited a particle size of 5–20 μm. Silica modified by silane coupling agent KH-570 was dispersed in waterborne acrylate coatings with a submicron scale. For a 2 wt% modified silica loading, the surface roughness of the coating on wood was influenced slightly and the elongation at break, the tensile strength, the elastic modulus, and the pencil hardness of the polyacrylate film were 303.06%, 48.673 MPa, 6.672 MPa and 2H level, respectively. The adhesion strength was enhanced significantly to level 0 with an increase in modified silica loading. The changes of film abrasion loss and gloss for the five groups are not obvious. The silica-modified coating exhibited slightly hydrophobic properties and a better lipophilicity. This paper provides a feasible route for the value-added utilization of rice husk.
研究领域:
材料科学
·
涂料技术
·
生物质利用
·
表面化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Xueya Liu,Yingqin Wei,Furong Tao,Xue Zhang,Ligang Gai,Libin Liu
Superhydrophobic surfaces with reversible switchable wettability have great application value in the treatment of oily wastewater. However, the advancement of switchable wettability surfaces is limited by the complexity of the manufacturing process and the excessive use of environmentally unfriendly solvents. Herein, an all-water-based reversible wettability coating was fabricated by simply spraying a water suspension consisting of N-[3-(trimethoxysilyl) propyl] ethylenediamine (AS)-, 3-(trimethoxysilyl) propyl methacrylate (KH-570)-, and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS)-modified titanium dioxide (TiO 2 ) nanoparticles and cellulose . The coating possesses good adhesion with various substrates and exhibits stable mechanical and chemical stability as well as good resistance to harsh environments such as various organic solvents , strongly corrosive environments and extreme temperature environments. The coating can be switched between having superhydrophobicity (160°) and superhydrophilicity under UV irradiation and heating treatment. The coated cotton fabric can separate heavy/light oil-water mixtures and water-in-oil/oil-in-water emulsions with a high efficiency of greater than 95%. Due to the photocatalytic properties of TiO 2 , the coating can degrade soluble pollutants in water during UV irradiation, and the degradation efficiency is over 97%. This study provides a green industrial route for designing a simple, switchable wettability coating, which is expected to promote the large-scale industrial production and application of functional smart surfaces.
研究领域:
材料科学
·
环境科学
·
化学工程
·
表面化学
✓ 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）