PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Guangmeng Chen,Sichuan Liu,Zhiyong Sun,Shifeng Wen,Tao Feng,Zhufeng Yue
Ice formation and accretion in outdoor equipment is a serious issue and various organogel materials with lubrication surface layer have been used as ice-phobic materials for its low ice adhesion strength . Here, an intrinsic self-healing organogel based on dynamic polymer network with self-regulated secretion of surface liquid is prepared by adding silicone oil to reversible crosslinked network. The prepared organogels present a faster self-healing process compared to material with no silicone oil that the scratch can be repaired within several hours in scratch test. Liquid secretion phenomenon is observed by recovery of water sliding angle after removing surface oil layer by water impacting, which confirmed the self-regulated secretion of inner liquid. Ice adhesion test shows that the organogel surface has a low ice adhesion strength (14.3 ± 1.6 KPa for PDMS-UI-80) during continuous icing/deicing process. The novel organogels provide a new idea to produce durable ice-phobic material with self-healing and self-regulated secretion properties.
研究领域:
材料科学
·
高分子化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2022
·
IF 4.966
Beiping Dong,Ziang Li,Juncheng Liu,Lifang Nie
Coating antireflection film on the surface of glass cover is one of the important methods to improve the photoelectric conversion efficiency of solar cells. Sol-gel method is suitable for low cost and large area preparation of antireflection film. However, most of antireflective films prepared with sol-gel have not enough good mechanical properties , and their applications are restricted. A porous antireflection film was prepared with sol-gel, where the polyethylene glycol monomethyl ether (mPEG) was used as the porogen . The effects of the mPEG additive amount were investigated on the microstructure and properties of the film. The results showed that the transmittance of the film (the coated glass) first increases and then decreases with the increase of the amount of mPEG. When the amount of mPEG is 0.6 g, the average transmittance of the film in the wavelength range of 380–1100 nm is the highest, higher than that of glass substrate by 4.2 percentage points. The adhesion of the film reaches grade 0 and the hardness is greater than 9H. The efficiency of monocrystalline silicon solar cells could be increased from 11.65% to 12.04%, by a relative increase of 3.35%
研究领域:
材料科学
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 24
·7576
·
IF 3.4
Tianlei Chen,Rong Zhong,Zhengjie Wang
In this study, a hydrophobic, wear-resistant ultraviolet (UV)-curable coating was investigated as an alternative to traditional coatings with low hardness and high susceptibility to scratching. The SiO2nanoparticles were ground and modified using high-energy ball milling, during which the surface energy of nano-SiO2particles rapidly increased as their particle size decreased. Different proportions of modified nano-SiO2particles were added to the coating and cured into a film. The structure of the composite coating was analyzed via infrared spectroscopy, scanning electron microscopy, and X-ray diffraction, which confirmed the successful preparation of the composite coating. The mechanical and optical property tests of the coating were investigated. With a 5% nano-SiO2content, the hardness of the coating reached 5H, whereas the adhesion was poor (2B), and the flexibility was 1. The overall comprehensive performance of the coating was best when the addition amount was 3%. The coating exhibited good hardness, flexibility, and adhesion. The hardness of the coating reached 4H, the adhesion was 4B, the flexibility was 5, the coating haze was 12.38 HZ, and the contact angle was 118°.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Yanmei Zhu,Chao Zhou,Li Liu,Guangfeng Wu
A new crosslinker, terminal amine-based polybenzimidazole (PBI–4NH 2 ), was made by molecular structure design. The structure of PBI-4NH 2 is characterized by –NH 2 , which can interact with –NCO in aqueous polyurethane systems to form a crosslinking network in the main chain of WPUs efficiently. The PBI-4NH 2 contains five benzene rings, which can significantly improve the overall performance of WPUs. The impact of incorporating PBI-4NH 2 on the thermal resistance, hydrophobicity, and adhesion properties of WPU was examined. The enhancement of PBI-4NH 2 concentration in the WPU system markedly elevated the thermal stability of the coatings, as evidenced by the rise in the T50 % decomposition temperature from 374.1 °C to 394.6 °C. The system's water resistance was markedly enhanced, achieving a maximum water contact angle of 91.1° and a reduction in water absorption rate to 4.79 %. The film's peel strength rose to 3.53 N/mm, while the adhesion attained 1.24 MPa. The novel formulation demonstrated superior overall performance and offered significant reference value for the practical application of aqueous polyurethane coatings.
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
PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Mingdong Yu,Faqian Liu,Fanglin Du
Polysiloxane coatings prepared by pre-hydrolysis/condensation of methyltrimethoxysilane (MTMS), etraethoxysilane (TEOS), methyltriethoxysilane (MTES) and polydimethylsiloxane (PDMS) in the presence of acid solution were presented in this paper in order to explore their potential use as protective and self-cleaning agents for car surface. The hardness and adhesion on the substrate properties of coatings were thoroughly examined by pencil hardness tester and adhesion tester. Contact angle meter was used to measure the hydrophobic angle properties of coatings. All the properties of coatings were related closely to the composition of coating and the hydrolysis degree of organoalkoxysilane. We found that the Scratch hardness can be improved by the controlling of TEOS quality ratio and acidity conditions, while more dosage of MTMS, MTES and PDMS favor raising the hydrophobic angle. Excellent adhesion property of paint coat was obtained with the presence of γ -(2,3-epoxypropoxy) propytrimethoxysilane (KH-560). Whatever, the best self-cleaning coatings with excellent hardness and adhesion on the substrate was sample A4 synthesized by a sol–gel process of low-cost organoalkoxysilane, prepared at the quality ratio of (MTMS):(TEOS):(MTES):(PDMS):(KH-560) of 8:7:4:4:4 and water-to-precursor quality ratio of 1:7. Finally, ambient-curable self-cleaning coating suitable for large area application was obtained. The scratch hardness and adhesion strength of the coatings was 3H and 0 after hardening with a high speed, respectively. The contact angle after UV aging of the coating was 92°. The transmittance of the coating exceeded 98.5%. Meanwhile, the coating has good resistance to solvent and weather resistance.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 12
·2105742
·
IF 17.521
Ke Li,Xingjie Zan,Chen Tang,Zhuangzhuang Liu,Jianghuan Fan,Gang Qin,Jia Yang,Wei Cui,Lin Zhu,Qiang Chen
Repeatability and high adhesion toughness are usually contradictory for common polymer adhesives. Repeatability requires temporary interactions between the adhesive and the substrate, while high adhesion toughness is usually achieved by permanent bonding. Integrating these two features into one adhesive system is still a daunting challenge. Here, the development of a series of viscoelastic elastomers composed of a soft and hard segment is reported, which exhibit tough, instant, yet repeatable adhesion to a variety of soft and hard surfaces. Such a combination of mutually exclusive properties is attributed to the synergy of high mobility of polymer chains and massive viscoelastic dissipation of the elastomers around the interface. By optimizing the relaxation time and mechanical dissipation, the resulting adhesives can achieve a tough yet repeatable adhesion toughness above 2000 J m −2 , superior to the best-in-class commercial adhesives. Numerous acrylate monomers are proven applicable to the preparation of such adhesives, validating the universality of the fabrication method. The application of these elastomers as adhesive and protective layers in soft electronics by virtue of their universal and tough adhesion to various soft and hard substrates is also demonstrated.
研究领域:
材料科学
·
化学工程
·
软电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 3
·583
·
IF 4.6
Guang-Zhao Li,Qiuhong Wang,Chongyu Zhu,Shuai Zhang,Fumei Wang,Lei Tao,Youqi Jiang,Qiang Zhang,Wenyan Wang,Rui Han
Epoxy-terminated hyperbranched polymers (EHBPs) are a class of macromolecular polymers with a hyperbranched structure containing epoxy groups. They possess characteristics such as low viscosity, high functionality, and thermal stability, which endow them with broad application potential in materials science and chemical engineering. This study uses epoxidized soybean oil (ESO) as the raw material, which undergoes ring-opening reactions with glycerol and is esterified with 2,2-bis(hydroxymethyl)propionic acid (DMPA) to obtain epoxy soybean oil polyol (EGD) with a high hydroxyl value. Subsequently, four types of EHBPs are synthesized by incorporating epichlorohydrin (ECH) in mass ratios of 1:3, 1:4, 1:5, and 1:6 under strong alkaline conditions. The product structure is characterized using FT–IR and GPC. The degree of branching of EGD is calculated using1H NMR and13C NMR spectroscopy. The epoxy value of EHBPs is tested using the hydrochloric acid–acetone method, and the water contact angle, adhesion properties, rheological properties, and thermal properties of the EHBPs are also evaluated. The results show that the degree of branching of EGD is 0.45. The epoxy values of the EHBPs are 0.73, 0.79, 0.82, and 0.89 mol/100g, respectively. As the epoxy value and molecular weight of the epoxy hyperbranched polymers (EHBPs) increase, the water contact angle and adhesion strength of the EHBPs rise progressively and the viscosity decreases. Additionally, the glass transition temperature increases with the increase in the epoxy value. These epoxy hyperbranched polymers with low viscosity and high adhesion strength offer a promising approach for modifying surface coatings or formulating adhesives.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Qinwen Zheng,Jian Lv,Jing Zhang,Jie Feng
In winter, when the trains run at high speed, snow that falls on the track is easily drawn onto the bottom of the train, and quickly forms ice. Such icing may cause serious safety issues. In this paper, the epoxy resin is used as a primary coat and a hydroxyl-terminated silicone oil (PDMS) was coated on it. Siloxane, with amido or epoxy terminal group, named KH 550 or KH 560, respectively, was used as a co-crosslinking agent of the epoxy and PDMS in order to ensure high adhesive strength between the two layers. The hydrophobic, icephobic and mechanical properties of the coatings were characterized by contact angle measurements , ice-adhesion tests and tensile tests , respectively. The results show that the contact angle of the PDMS coating crosslinked by the KH 550 reaches 114.1°, and it can still show good hydrophobic properties after being immersed in water for 10 days. The adhesive strength of the ice on the PDMS coating is only 2.5% of that of ice on the epoxy coating . The low surface energy and the low elastic modulus should be responsible for the excellent icephobic properties. Moreover, the bonding force between the PDMS coating and the epoxy primer is also excellent. When the KH 560 was used as the co-crosslinking agent, the hydrophobic and icephobic properties of the top PDMS coating were improved due to its week polarity compared with KH 550. This study will be helpful in resolving the problems associated with the running of high speed trains in winter or the electric power system which requires resistance to freezing rain.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yong Lu,Huixia Feng,Haidong Xu
A green phytic acid film was prepared on the steel surface before the natural garlic extract was used for the post-treatment of the conversion coating. Then scanning electron microscopy (SEM) equipped with X-ray energy dispersive spectrum (EDS) were adopted for micro-morphology and elemental composition determination of different samples. Atomic force microscopy (AFM) and contact angle measurement were used to assess the adhesion properties of the prepared coating. At last, the electrochemical characteristic of the coating on the Q235 steel was examined using electrochemical impedance spectroscopy (EIS) and polarization curves in a 3.5 wt. % NaCl. SEM and AFM studies have shown that a homogenous, flake-like coating with lower crack was deposited on the steel surface. Particularly, EIS studies have shown that the anti-corrosion performance of the coating that treated with the garlic extract was markedly improved. Simultaneously, the adhesion property with the subsequent coating adhesion was also increased.
研究领域:
材料科学
·
表面工程
·
电化学
·
绿色化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Kangren Niu,Kuiyan Song
The beeswax used in Chinese traditional hot waxing is expensive and has relatively scarce resources. To provide a low-cost alternative and expand the applications of hot waxing for wood repair and protection, polyethylene wax grafted with maleic anhydride and methyl methacrylate was used for the hot waxing treatment of wood. The surface/interface between wax and wood was characterized by Fourier-transform infrared spectra (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD), and the effects of hot waxing temperature and time on the surface roughness and gloss, hydrophobicity, adhesion and thermal stability of treated wood were studied. The properties were compared with those of wood hot waxed with beeswax. The results showed that the modified polyethylene wax filled the wood cell lumina, cross-linked with the wood matrix, and formed a smooth and continuous wax layer on the wood surface. This greatly reduced the wood surface roughness and improved surface gloss. The hydrophobicity and thermal stability of wood were also improved, and the wax layer adhered well to the wood. When used to hot wax wood samples at 180 ℃ for 40 min, the wood modified with polyethylene wax achieved superior gloss, adhesion, and thermal stability to the wood treated with beeswax.
研究领域:
材料科学
·
木材科学与技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Pengli Zhang,Guoliang Zhang,Jiansen Pan,Chunfeng Ma,Guangzhao Zhang
Flexible hard coatings with strong adhesion are critical requirements for several foldable devices and marine applications; however, only a few such coatings have been reported. Herein, we report a non-isocyanate polyurethane (NIPU) coating prepared by the epoxy–oligosiloxane nanocluster–amine curing reaction and cyclic carbonate–amine polyaddition, where the former provides the coating with ceramic-like hardness and polymer-like flexibility while the latter polymerization results in NIPU with strong substrate adhesion. The coating is transparent (>92% transmittance), hard (5–7 H), and flexible (2 mm bending diameter). It has strong adhesion to various substrates including aluminum alloy, titanium, steel, glass, ceramic, epoxy, and polyethylene terephthalate (2–8 MPa), which can be attributed to the high density of polar groups in NIPU. Moreover, we can facilely endow the coating with anti-icing, self-cleaning, and anti-smudge capabilities by incorporating amine-terminated low-surface-tension polydimethylsiloxane (PDMS) to replace a part of the amine curing agent. Particularly, the mechanical properties of NIPU coatings are only slightly affected by the introduction of low-content PDMS since it intends to enrich on the surface. The novel coating has promising future for use in fields of foldable devices and marine applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Ting Pan,Hao Wu,Zhiqiang Guan,Xiaofei Zhu,Yingqian Hu,Linxuan Fang,Yongbing Pei,Lianbin Wu
Octaglycidyldimethylsilyl polyhydric silsesquioxane (OG-POSS) in coordination with tetraethyl orthosilicate, tetrapropyl orthosilicate and tetrabutyl orthosilicate mixed solution was applied to the bonding of metal substrate and silicone resin thermal protective coating. The influence of OG-POSS addition on the interface of primer was systematically investigated by means of scanning electron microscope (SEM), salt spray test, thermogravimetric infrared spectroscopy (TGA-IR) and back temperature test. Results showed that the addition of OG-POSS favored the formation of a silane film of the primer, resulting in a more compact and continuous film. At the same time, the silane film had excellent corrosion resistance and adhesion, with a maximum adhesion strength of about 1.42 MPa. In addition, OG-POSS provided a unique Si-O-Si cage structure in the primer, which improved the ablation resistance of the interface layer, preventing the degradation and peeling of the coating in harsh environments.
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
危险品化学品经营许可证（带存储）