PROGRESS IN ORGANIC COATINGS
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2024
·
IF 6.5
Yujie Jiang,Cancai Wang,Zhi Liu,Minghao Zhang,Jiayi Zhang,Qian Liu,Dejin Zhang,Yuetao Liu
At present, silicone superhydrophobic coatings are attracting much attention in the fields of anti-corrosion and antifouling, so they have a broad application prospect. In this paper, superhydrophobic surfaces with continuous micro/nano structure were prepared on various substrates using a simple blending method similar to the conventional preparation of RT vulcanized silicone rubber. The difference was that the new kinds of crosslinker (MF-S) was synthesized by 3-glycidyloxypropyltrimethocysilane and 3-aminopropyltriethoxysilane. Linear fluorinated copolymer (L-SF) was prepared by free radical polymerization of 3-mercaptopropyltriethoxysilane (MPTES) and 1H, 1H, 7H-dodecafluoroheptyl methacrylate (DFMA). And the condensation reaction with α, ω-dihydroxypodimethylsiloxane (PDMS), tetraethyl orthosilicate (TEOS), and inorganic nanoparticles constructed superhydrophobic coatings with continuous micro- and nanostructures. The coating had a water contact angle (WCA) of up to 162° and a sliding angle (SA) as low as 2°. What's more, the WCA of the coating remained around 160° and the SA stayed below 5° after sandpaper abrasion, UV irradiation, and hot and cold treatment. The adhesion of the coating on different substrates was higher than 2 MPa. Due to the synergistic effect of the superhydrophobicity of the coating and the photocatalytic activity of the TiO 2 nanoparticles , the coating achieves an antimicrobial efficiency of 97.8 % against Staphylococcus aureus . The synergistic effect of the air layer and the densification of the coating resulted in the electrical impedance modulus at the lowest frequency of the coating remaining two orders of magnitude higher than that of the bare carbon steel plate after several days of immersion in sodium chloride solution. The work showed great potential for application in anti-corrosion and anti-fouling coatings.
研究领域:
材料科学
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表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 6
·4341-4350
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IF 1.339
Frueh Johannes,Gai Meiyu,Yang Zhibo,He Qiang
Biofouling is one of the biggest problems of water-borne systems. Since not only marine but also freshwater-based structures are affected, the biofouling in this environment is studied. The focus of this study lies on the antifouling properties of novel coating materials like polyelectrolyte
multilayers (PEM) compared with currently used silicon rubber (PDMS) based fouling release coatings. The following article contains the results of a systematical screening of the mechanical, surface charge and surface nano-heterogeneous properties of the investigated PEM and PDMS systems.
The results show that negatively charged non crosslinked and crosslinked PEM coated PDMS can surpass current PDMS based fouling release coatings. The PEM films are not only able to reduce the biofouling, but are additionally able to control the type of settled bacteria (gram positive or negative).
The negative terminated surfaces inhibit the settlement of gram positive bacteria, whereby the positive terminated surfaces inhibit the settlement of gram negative bacteria.
研究领域:
生物学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 11
·2200355
·
IF 4.402
Yang Chen,Zhuodong Liu,Yisen Huang,Mei Liang,Huawei Zou
The strength of the ceramic layer formed during ablation of the silicone rubber composite is closely related to its resistance to ablation. Increasing the content of graphitic carbon in the ceramic layer plays a key role in enhancing the strength of ceramic layer. In this study, series of catalytically graphitized mesophase pitch-modified silicone rubber composites with excellent ablation performance are prepared. And the average linear ablation rate of the composite is reduced to a maximum of 0.046 mm s -1 , which is 44.0% lower than that of the sample without catalyst named 5MP. XRD characterization proves that the addition of transition metal catalysts increases the content of graphitic carbon in the ceramic layers after ablation. The strength of ceramic layer of the 0.13Fe 2 O 3 reached 12.09 MPa, which is 60.3% higher than that of the 5MP. The transition metal catalyst effectively increases the content of graphitic carbon in the ceramic layers, and the strengths of the ceramic layers are significantly improved, thereby greatly improving the ablation performance of the composites.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xingyang Xu,Rongrong Chen,Gaohui Sun,Jing Yu,Qi Liu,Jingyuan Liu,Cunguo Lin,Peili Liu,Jun Wang
Non-toxic poly(dimethylsiloxane) (PDMS) elastomer antifouling coatings are used to protect marine equipment from biofouling; however, the coatings cannot resist all fouling organisms. Hydrophilic modification is an effective way to enhance antifouling performances in PDMS but most modification methods are complex and inconvenient. In this work, flame treatment was used to replace other complex surface activation techniques, such as plasmas. The sulfobetaine silane and polyvinyl alcohol (PVA) modifications were developed for flame treatment. The sulfobetaine silane-modified flame-treated PDMS reduced diatom adhesion by 99.0% compared to untreated PDMS. The PVA modification involves a two-step spray process and is simpler than sulfobetaine silane modification. This strategy coats PVA on flame-treated PDMS through the crosslinking effect of boric acid on PVA, which reduced diatom adhesion by 86.6% in the lab and gave better antifouling performances in field tests compare to bare PDMS.
研究领域:
材料科学
·
海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 16
·21052-21064
·
IF 2.478
Li Chaohua,Su Shengpei,Wang Bikui,Zhou Jijia
It is of great interest and challenge to simultaneously improve the storage stability and bond strength of one-component addition-cure liquid silicone rubber (OLSR) coating for electronic circuit board. In this work, we proposed an efficient approach to address this issue by incorporating both cyano-modification platinum catalyst (CN–PT) and urethane-containing poly(hydromethylsiloxane) (N-PHMS) into OLSR coating using a mechanical mixer. The CN–PT and N-PHMS were synthesized through thermal polymerization reaction and hydrosilylation reaction, respectively. The OLSR coating containing 0.3 phr CN–PT and 3 phr N-PHMS showed the best properties, with a tensile bond strength of 1.63 MPa, a storage period > 180 d at 25 °C, and a curing rate < 2 h at 80 °C. The salt-spray resistance and continuous power-on performance of OLSR coating were also improved, compared with pure OLSR coating. The synergism of CN–Pt and N-PHMS on the enhancement of both the storage stability and bond strength of OLSR coating was also explored. Our findings exhibited great potentials for fabricating OLSR coating with excellent long-term stable service performance including high storage stability and protective ability.
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
危险品化学品经营许可证（带存储）