CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2020
·
IF 2.627
Abid Ali,Lina Song,Jiankun Hu,Jingxian Jiang,Qingqing Rao,Muhammad Shoaib,Shah Fahad,Yongjie Cai,Xiaoli Zhan,Fengqiu Chen,Qinghua Zhang
In this work, a degradable polyurethane composed of caprolactone (CL) and L-Lactide (LLA) as soft segments, and 4,4′-methylenebis(cyclohexyl isocyanate) (H 12 MDI) and polytetramethylene ether glycol (PTMEG) as hard segments, was prepared. Hydrolytic degradation experiment revealed that the degradable polyurethane (PU) could be degraded in artificial seawater. It also showed that caprolactone-co-polyurethane (CL-PU) copolymer with higher crystallinity degraded much slower in artificial seawater. However, the introduction of LLA resulted in an increase in the hydrophilicity and reduction in the crystallinity of degradable PU, as demonstrated by the contact angle analysis. The result of the scanning electron microscope showed that the surface of degradable PU renewed under static condition. Moreover, degradable PU was able to be used as a carrier, and it controlled the release rate of 4, 5-dichloro-2-octyl-isothiazolone (DCOIT). The anti-diatom (Navicula incerta) test demonstrated that the (caprolactone-co-L-lactide)-co-polyurethane 4 (CL/LAx-PU4) with DCOIT contents prevented the adhesion of diatom Navicula incerta (88.37% reduction) due to their self-polishing and the release of antifoulants. Therefore, the degradable PU consisted of CL, LLA, and DCOIT could be a durable resin with good antifouling activity for the application in the marine anti-biofouling field.
研究领域:
材料科学
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海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 35
·19642-19650
·
IF 2.936
Fancui Meng,Zhuangzhuang Qiao,Yan Yao,Jianbin Luo
Polyurethane with pendant azide groups on the soft segment (PU-GAP) was prepared in this study to further increase the content of reactive azide groups and improve their surfaces enrichment for further functionalization. Polymer diols with pendant azide groups (GAP) were prepared by transforming the pendant chlorine groups at polyepichlorohydrin (PECH) into azide groups with sodium azide. The prepared PECH, GAP and PU-GAP was characterized by GPC, 1H NMR and FTIR. Propargylic mPEG (mPEG-alkyne) was used as model surface modification reagents which was grafted on the prepared azido containing polyurethane films via click chemistry. The surface morphology, chemical composition and wettabilities were studied by SEM, XPS and water contact angle (WCA) analysis, respectively. SEM results demonstrated different surface topologies between mPEG modified PU surface and original PU surface. XPS and WCA analysis proved the successful grafting of mPEG on the pendant azide groups of PUs. The mPEG modified PU surfaces demonstrated good antifouling activities against model bacteria and mPEG with larger molecular weights modified surfaces showed better resistance efficiency to attachment of bacteria. Therefore, the surface reactive polyurethane we prepared can be a universal platform for further functionalization according actual applications.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Materials and Technologies
·
2024
·
IF 8.6
Xiaowei An,Jiannan Cheng,Qi Li,Jiyun Tang,Zongkui Li,Liwei Liu,Hui Yang,Chunyang Wei
Silicone-based fouling release coatings (FRCs) have shown great promise as an environmentally friendly antifouling technology, while inferior mechanical properties and insufficient substrate adhesion have hindered their further application. We focused on enhancing the mechanical robustness of silicone-based coating through the synergistic effects of hydrogen bonding , π-π aromatic interaction and covalent bonding. The resulting silicone-based coating displayed a low surface energy of 23 mJ/m 2 and improved mechanical strength and substrate adhesion, offering values up to 6.4 MPa (9.1 times higher) and 2.87 MPa (25.7 times higher), respectively. Additionally, the modified coating demonstrated a tear strength of 9.8 kN/m and mass loss only about 30 mg after enduring 10,000 wear cycles. Alkoxysilane-functionalized polyethylene glycol and quaternary ammonium salt were grafted into the cross-linking structure to make them anchored to the networks and migrated to the surface layer in seawater without releasing. The coating provided 99.1% antibacterial efficiency and effective antidiatom performance (≤ 11.2 cell/mm 2 ). After a 12-month marine field test , the developed film showed only 20% micro bio-fouling compared to 100% fouling coverage on the PDMS surface. By combining improved mechanical properties with antifouling characteristics, this new multifunctional silicone-based FRC exhibits tremendous potential for sustainable marine antifouling coating application .
研究领域:
材料科学
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海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
Biomimetics
·
2022
·Vol. 7
·期 4
·248
·
IF 3.743
Pan Cao,Huming Wang,Mingyi Zhu,Yifeng Fu,Chengqing Yuan
Any surface immersed in sea water will suffer from marine fouling, including underwater sound absorption coatings. Traditional underwater sound absorption coatings rely heavily on the use of toxic, biocide-containing paints to combat biofouling. In this paper, an environmentally-friendly nanocomposite with integrated antifouling and underwater sound absorption properties was fabricated by adopting MWCNTs-COOH and SiO2into PDMS at different ratios. SEM, FTIR and XPS results demonstrated MWCNTs were mixed into PDMS, and the changes in elements were also analyzed. SiO2nanoparticles in PDMS decreased the tensile properties of the coating, while erosion resistance was enhanced. Antibacterial properties of the coatings containing MWCNTs-COOH and SiO2at a ratio of 1:1, 1:3, and 1:5 reached 62.02%, 72.36%, and 74.69%, respectively. In the frequency range of 1500–5000 Hz, the average sound absorption coefficient of PDMS increased from 0.5 to greater than 0.8 after adding MWCNTs-COOH and SiO2, which illustrated that the addition of nanoparticles enhanced the underwater sound absorption performance of the coating. Incorporating MWCNTs-COOH and SiO2nanoparticles into the PDMS matrix to improve its sound absorption and surface antifouling properties provides a promising idea for marine applications.
研究领域:
材料科学
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海洋工程
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环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 46
·24240-24247
·
IF 3.708
Qun Zhang,Xinde Tang,Tieshi Wang,Faqi Yu,Wenjuan Guo,Meishan Pei
Novel thermo-sensitive zwitterionic ABC-type triblock copolymers poly(ethylene glycol)-block-[2-(methacryloyloxy)ethyl]dimethyl(3-sulfopropyl)-ammonium hydroxide-block-poly[2-(dimethylamino)ethyl methacrylate] (MPEG-b-PSBMA-b-PDMAEMA) were synthesized by atom transfer radical polymerization (ATRP). The bromide-terminated diblock copolymers poly(ethylene oxide)-block-[2-(methacryloyloxy)ethyl]dimethyl(3-sulfopropyl)-ammonium hydroxide (MPEG-b-PSBMA-Br) were prepared by the ATRP of methacryloxyethyl sulfobetaine initiated by the macroinitiator MPEG-Br, which was obtained by the esterification of poly(ethylene glycol) monomethyl ether (MPEG) with 2-bromoisobutyryl bromide. Then, poly(2-(diethylamino)ethyl methacrylate) (PDMAEMA) was introduced by a sequential ATRP process to obtain the triblock copolymers. These copolymers with varied compositions, molecular weights and polydispersities were characterized by 1H NMR and GPC. Variable temperature ultraviolet analysis was employed to test their stimuli-sensitive properties. These block copolymers exhibited distinct thermo-sensitivity under different molecular compositions or solution conditions. The resistance to the non-specific protein adsorption of the triblock copolymers was evaluated, and excellent antifouling property occurred. This can be attributed to surface hydration via hydrogen bonds between PEG and water molecules and the surface hydration via ionic-induction between PSBMA and water molecules. The synergistic effect resulted in an effective reduction of protein adsorption. These copolymers have potential applications as antifouling and antibacterial agents.
研究领域:
材料科学
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高分子化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Wenjing Ma,Wenxuan Cao,Tao Lu,Ranhua Xiong,Chaobo Huang
Extensive progress has been made to construct superwetting membranes for oil/water separation. However, the membrane with hierarchical micro/nanostructure fabricated by chemical method generally involves tedious, time-consuming processes and cause secondary pollutants, which has greatly restricted their wide application. We herein report the rational design of a porous hybrid membrane (ZIF-8 @PAN) by water etching of sacrificial polyvinylpyrrolidone (PVP) of blowing-spun polyacrylonitrile (PAN)/PVP composite nanofibrous membrane during the process of in-situ growth of ZIF-8 nanoparticles onto the fiber, for effective separation of on-in-water emulsion and water purification . Specially, the porous structures increase the gaps among the fibers, thus creating new penetration paths. The formed ZIF-8 nanoparticles improved the underwater superoleophobicity and facilitated the emulsion demulsification due to the increment of the roughness of the as-fabricated membrane. Therefore, the ZIF-8 @PAN membrane exhibits high flux (> 4410 L m −2 h −1 ) and separation efficiency (> 99.8%) for various surfactant-stabilized oil/water emulsions (SSEs). Besides, the synergistic effect of the electrostatic adsorption and the ZIF-8 photodegradation also render this membrane with a high organic dye removal efficiency (>90%). Meanwhile, the membrane demonstrates outstanding antibacterial activity. Hence, the synergistic effect of low oil adhesion, photocatalysis , and antibacterial effect contributes to the enhancement anti-fouling ability. Further, the membrane also exhibits good chemical stability and effective separation of complex wastewater. This strategy may shed light on the design of multifunctional membranes for the treatment of complex oily wastewater.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 26
·11729-11740
·
IF 2.7
Ying Liu,Ruotong Ru,Chengjun Ge,Linlin Zhang,Hongfei Sun
The marine biofouling of deep-sea exploration equipment has compromised its normal purpose of detecting marine resources, and conventional self-renewing hydrogel coatings have become unsuitable for precision instruments due to the release of antifouling agents or heavy metals. Zwitterions exhibit excellent antifouling ability due to the hydration layer formed by molecules with equal amounts of cationic and anionic groups, resulting in an overall neutral charge. Herein, a non-releasing, mechanically strong surface hydrogel coating suitable for deep-sea probes was successfully prepared based on sulfobetaine-tannic acid zwitterionic hydrogel coatings (PVATAZ), aiming to achieve high antifouling performance. Benefiting from the hydration layer generated by the zwitterion and the significant mechanical performance of strong hydrogen bonding between poly(vinyl alcohol) and tannic acid (TA), the resulting optimized PVATAZ hydrogel coatings exhibited excellent antifouling performance and high tensile strength. Specifically, under stress up to 0.41 MPa, elongations can reach up to 228% and the colony forming units of E. coli and S. aureus in PVATAZ are 0.08 and 0.05 per milliliter, respectively. The efficiency of zwitterion-containing hydrogel coatings in resisting marine fouling while being environmentally friendly renders them promising as hydrogel coatings for deep-sea probes.
研究领域:
材料科学
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海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Shidong Zhao,Limin Wu,Shuxue Zhou
A liquid-like poly(dimethylsiloxane) (PDMS) brush as an environmentally friendly, low surface energy modifier has a significant effect on improving the antismudge properties of coatings. However, in order to obtain a sufficient length of freely mobile chain segments to meet the liquid repellency, expensive single-terminal functionalized PDMS has to be chosen in the preparation of antismudge coatings. In this work, double-terminal functionalized PDMS was employed to fabricate antismudge polyurethane (PU) coatings with the help of alkyltrichlorosilane (RSiCl3). That is, bihydroxypropyl PDMS (BHPDMS) was terminated with RSiCl3, further grafted onto acrylic polyol chains using its residual Si–Cl bonds, and subsequently cured with an isocyanate trimer. Effects of the molecular weight of BHPDMS (Mn = 1000, 2000, 4300, and 10,000 g/mol) and the type of RSiCl3 (R = methyl, dodecyl, octadecyl) on the surface wettability of antismudge PU coatings were investigated. Among them, octadecyltrichlorosilane (OTS) terminated BHPDMS4300 exhibited the lowest water contact angle hysteresis (10.1°), which was even lower than that of the control samples via direct addition of monohydroxypropyl PDMS or BHPDMS4300. The antismudge PU coating also presented high transparency (90.5%) and excellent liquid repellency against various low surface tension liquids. Even after friction with steel wool, the coating can still maintain excellent antismudge performance. The results also showed enhancement of OTS on the liquid repellency of antismudge PU coatings, indicating its synergistic effect with BHPDMS brush. It is envisioned that OTS-terminated BHPDMS additive provides an avenue to fabricate cost-effective transparent antismudge PU coatings.
研究领域:
材料科学
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化学工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2011
·
IF 2.78
Zhiyun Zhang,Jianchun Wang,Qin Tu,Nan Nie,Jun Sha,Wenming Liu,Rui Liu,Yanrong Zhang,Jinyi Wang
The current paper reports the synthesis of a highly hydrophilic, antifouling dendronized poly(3,4,5-tris(2-(2-(2-hydroxylethoxy)ethoxy)ethoxy)benzyl methacrylate) (PolyPEG) brush using surface initiated atom transfer radical polymerization (SI-ATRP) on PDMS substrates. The PDMS substrates were first oxidized in H 2 SO 4 /H 2 O 2 solution to transform the Si–CH 3 groups on their surfaces into Si–OH groups. Subsequently, a surface initiator for ATRP was immobilized onto the PDMS surface, and PolyPEG was finally grafted onto the PDMS surface via copper-mediated ATRP. Various characterization techniques, including contact angle measurements, attenuated total reflection infrared spectroscopy, and X-ray photoelectron spectroscopy, were used to ascertain the successful grafting of the PolyPEG brush onto the PDMS surface. Furthermore, the wettability and stability of the PDMS–PolyPEG surface were examined by contact angle measurements. Anti-adhesion properties were investigated via protein adsorption, as well as bacterial and cell adhesion studies. The results suggest that the PDMS–PolyPEG surface exhibited durable wettability and stability, as well as significantly anti-adhesion properties, compared with native PDMS surfaces. Additionally, our results present possible uses for the PDMS–PolyPEG surface as adhesion barriers and anti-fouling or functional surfaces in biomedical applications.
研究领域:
材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Donghui Wang,Jiakang Xu,Jinyan Tan,Jinlong Yang,Shuxue Zhou
Amphiphilic coatings, especially those containing zwitterionic groups, are promising as antifouling coatings. Nevertheless, zwitterion based amphiphilic coatings suffer from poor miscibility between hydrophobic and hydrophilic ingredients. Zwitterionic precursors are good candidates to circumvent this issue, but acid or alkaline water must be used in-situ for the zwitterionic group to be self-generated. The in-situ feature restricts its applicability. The objective of this work focuses on developing a new zwitterionic precursor for easy fabrication of zwitterionic groups containing amphiphilic antifouling coatings. This precursor, i.e., triisopropylsilyl 2-methyl-3-((3-(triethoxysilyl)propyl) amino) propanoate (TMAP), was facile synthesized by one step of aza -Michael addition of (3-aminopropyl) triethoxysilane (APS) and triisopropylsilyl methacrylate. Then further blended with hydroxyl-terminated PDMS (HO-PDMS). The curing behavior, morphology, wetting behavior and the antifouling performance both in lab and field were thoroughly examined for coatings with various amounts of TMAP. It was interesting to find that TMAP could not only be hydrolyzed in-situ into a zwitterionic group via a self-catalytic effect during the curing process, but it also efficiently crosslinked the HO-PDMS under ambient conditions. In contrast to APS, TMAP was also more compatible with HO-PDMS and endowed the coating with relatively homogeneous and a smooth surface after prolonged submersion in artificial seawater. The TMAP-based amphiphilic coatings efficiently mitigated the microfouling in both the laboratory assay and the natural field condition in contrast with common silicone elastomer . Notably, excellent resistance for the macrofouler of the mussel was observed for these coatings, especially for 50 wt% TMAP containing coating with zero settlement.
研究领域:
材料科学
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海洋生物学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Liangpeng Zeng,Hongyuan Cui,Huilan Peng,Xiaohang Sun,Yi Liu,Jingliang Huang,Xinxing Lin,Hui Guo,Wei-Hua Li
Owing to their inherent semi-solid property and lubricant ability, organogels manifest various unique characteristics and serve as promising candidates for antifouling. However, the poor mechanical properties of organogels often limit their practical applications. Herein, we report a simple and effective method to prepare organogels with reinforced mechanical performance and surface lubricant ability with the synergistic roles played by oleophobic and oleophilic chains. The rigid oleophobic chains have a poor affinity to lubricating solvent, which gives rise to high oleophobic interactions between polymer networks; the soft oleophilic chains possess a high affinity to the low surface energy solvent, which lead to high solvent content to maintain the satisfactory lubricant capacity. The organogel of oleophobic methyl methacrylate (MMA) and oleophilic lauryl methacrylate (LMA) is chosen as a representative example to illustrate this concept. With the optimal composition, the as-prepared organogels offer satisfactory tensile fracture stress, fracture strain, Young's modulus, toughness, and tearing fracture energy of 480 kPa, 550%, 202 kPa, 1.14 MJ m −3 , and 5.14 kJ m −2 , respectively, which are far beyond the classical PLMA organogels. Furthermore, the biofouling resistance tests demonstrate 4 to 9-fold reduction of protein and bacteria adhesion on the reinforced organogels surface in comparison to the glass substrate and solvent-free dry organogels. This simple and effective approach to toughen organogels, we hope, can be applied in various fields with different practical functional requirements in the future.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Rijia Jiang,Mengyue Liu,Xiangyu Zheng,Xing Zhou
The prevention and control of water biofouling has always been the focus of antifouling research. Coatings containing metal ions can effectively inhibit biofouling. However, the application of this type of coating has been limited as a result of its toxicity, irreparability, and poor antifouling ability under static conditions. Here, we have synthesized a self-repairing polymer antifouling coating with hydrophobic and multiple self-repairing systems through structural design with polytetrahydrofuran (PTMEG), isophorone diisocyanate (IPDI), perfluorooctyl ethyl acrylate (TEAc-8), triclosan (TCS), and 3,3-dithiodipropionic acid as a raw material. The prepared coating can realize a self-repairing function at room temperature in both air and water, thereby prolonging the antifouling life of the coating. A large number of hydrogen bonds in the molecular structure enable the coating to have good adhesion to the substrate. At the same time, the lower surface energy (<20 mN/m) and higher hydrophobic angle (>110°) of the coating determine the material’s good fouling release ability. In addition, the lake antifouling experiments show that the coating has good static antifouling ability. The coatings prepared will provide an alternative strategy for designing self-healing marine antifouling coatings in practical applications.
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
危险品化学品经营许可证（带存储）