Coatings
·
2017
·Vol. 7
·期 8
·117
·
IF 2.175
Wenjing Xia,Nianqing Zhu,Rongjie Hou,Wengui Zhong,Mingqing Chen
The polyurethane prepolymer terminated with a double bond was synthesized using isophorone diisocyanate (IPDI), hydroxyl terminated polybutadiene (HTPB), 1,4-butanediol (BDO), and 2-hydroxyethyl acrylate (HEA). Then, a series of innovative UV-curable polyurethane coatings were prepared by blending ene-terminated polyurethane, fluoroacrylate monomer, and multifunctional thiol crosslinker upon UV exposure. The incorporation of fluoroacrylate monomer and multifunctional thiols into polyurethane coatings significantly enhanced the hydrophobic property, mechanical property, pencil hardness, and glossiness of the polyurethane coatings. This method of preparing UV crosslinkable, hydrophobic polyurethane coatings based on thiol-ene chemistry exhibited numerous advantages over other UV photocuring systems.Keywords:polyurethane;fluorine-containing;UV-crosslinkable
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2012
·Vol. 21
·期 10
·721-730
·
IF 0.936
Yan Zhenlong,Liu Weiqu,Gao Nan,Sun Yue,Chen Haisheng
A novel dicarboxyl-terminated poly(2,2,3,4,4,4-hexafluorobutyl acrylate) oligomer (CTHFA) was synthesized through metal-free anionic polymerization and hydrolysis reaction. Chemical structures of CTHFA were characterized by gel permeation chromatography and 1 H NMR. Two types of CTHFA with different chain lengths were initially used as an efficient surface modifier to improve the surface properties of epoxy resin, at the content of CTHFA ranging between 0 and 8 wt%. We minimized the amounts of the CTHFA used to achieve a high hydrophobic surface that was not obviously affected by the thermal properties of the epoxy resin. Surface properties and surface composition of the designed fluorinated epoxy resin were investigated by the contact angle and X-ray photoelectron spectroscopy (XPS). Modified epoxy resin with 5 wt% CTHFA containing longer chain length showed excellent hydrophobic surface properties (a high water contact angle about 115° and low surface energy 14.12 mN/m 2 ) while the modified epoxy resin with 5 wt% CTHFA containing shorter chain length did not. XPS analyses indicated that the 5 wt% of fluorinated CTHFA epoxy resin with long macromolecular-chain enhanced more fluorinated groups’ migration to the surface than the fluorinated CTHFA-modified epoxy resin with short macromolecular-chain at the same content. Moreover, thermal properties of CTHFA-modified epoxy resin were also investigated.
研究领域:
材料科学
·
高分子化学
·
表面工程
✓ 已验证
DOI
高影响因子
Coatings
·
2022
·Vol. 12
·期 9
·1271
·
IF 3.236
Fuquan Deng,Shuangyi Qin,Na Liu,Wei Xu
The hydrophobic modification effect and an appropriate cost of waterborne polyurethane are regularly pursued targets of researchers. To further enhance the hydrophobic modification effect of the terminal fluoroalkyl group and control the cost, a fluorine-containing pendant group diol (DEFA) was first synthesized by the Michael addition reaction of diethanolamine (DEOA) and dodecafluoroheptyl methacrylate (G04). Next, a series of modified polyurethane latexes (TPFPU) by the terminal fluoroalkyl segments (perfluorohexyl ethanol, S104) and the pendant fluoroalkyl segments (DEFA) were synthesized by varying the DEFA dosage. Structure and performance properties of the resultants were characterized by IR,1H NMR, TEM, TGA, DSC, XRD, XPS, SEM, AFM and contact angle measurements. Results confirmed that the product could be successfully prepared using the present method. With the increase in DEFA dosage, the average particle size increased gradually. Thermal stability was enhanced and small regional crystals were probably produced. XPS and AFM results demonstrated that the degree of microphase separation and film roughness were increased with the increase in DEFA amount. Hydrophobicity of the TPFPU’s film was also increased with the increase in DEFA dosage, and it could be guaranteed when the mass content of S104 and DEFA was larger than 17.0 wt% in total mass of raw materials, which demonstrates that the terminal and pendant fluoroalkyl groups have the favorable synergistic effect on the properties of polyurethane.Keywords:fluorinated polyurethane;branched polyurethane;hydrophobicity;synergistic effect
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Zhang Hou-Li,Sun Yu-Quan,Xu Yao,Wang Lu,Li Ying,Zhang Jie,Geng Bing,Li Shu-Sheng,Zong Chuan-Yong
The advancement of functional adhesives featuring recyclable and repairable properties is of great significance in interfacial science and engineering. Herein, a series of high-strength, recyclable fluorine-containing adhesives (ESO x -FPF) were designed and synthesized by crosslinking two prepolymers, FPF-B (derived from side-chain fluorinated diol, isocyanate, and aminoboric acid) and ESO-B (synthesized from biobased epoxy soybean oil and aminoboric acid), through dynamic boro-oxygen bonds. The resulting adhesive exhibited an optimal tensile strength of 42 MPa and the shear strength on steel plates reached as high as 3.89 MPa. More importantly, benefiting from the dynamic reversibility of the boron-oxygen bonds along with the hydrogen bonds interaction, ESO x -FPF can be welded with the assistance of solvents and recycled for multiple cycles. The outstanding healing efficiency and excellent reprocessability of these functional adhesives were confirmed by mechanical testing. Moreover, the as-prepared adhesives demonstrated universal and remarkable adhesion to various substrates, such as aromatic polyamide, aluminum plates and polycarbonate, meanwhile, they could be easily disassembled and recycled using ethanol without damaging the substrates surface. This study not only provides a simple strategy for the synthesis of eco-friendly adhesives with weldable and recyclable properties, but also sheds light on the development of other functional materials utilizing dynamic covalent chemistry.
研究领域:
界面科学
·
材料工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Guangxin Liao,Li Li,Zeyu Kang,Xibing Zhou,Jie Li,Zhulin Xue,Huiqin Gao,Zhang Lin,Weizhen Liu
Fluorine-containing sludge (FCS), an industrial hazardous waste generated during processes such as fluorine chemical production and solar cell manufacturing, is highly toxic and challenging to degrade, posing significant environmental threats. In this study, we developed a promising new method to convert FCS into monodisperse, highly crystalline, and high-purity CaF2 nanomaterials using low-concentration inorganic or organic acids as regulators under hydrothermal conditions. This method involved regulating the dissolution–deposition behaviours of the CaF2 matrix, controlling impurity transformation, promoting the growth of CaF2 crystals and achieving deep removal of impurities. Under optimized conditions (0.5 M hydrofluoric acid, liquid-to-solid ratio of 10 : 1, 180 °C, and 24 h), the produced CaF2 exhibited 98% purity, 99% crystallinity and excellent monodispersity. The purification and impurity separation mechanism of CaF2 in FCS was studied by analysing the dissolution–deposition process, the crystal growth behavior of CaF2, and the migration and transformation of impurities under the treatment. It was revealed that hydrofluoric acid, as a regulator, plays the following important roles: (i) targeted conversion of calcium in sludge into CaF2 and enhancement of its purity, (ii) regulation of the digestive ripening process of fine CaF2 particles and enhancement of the dispersity and crystallinity of the CaF2 product, and (iii) release of encapsulated and lattice-doped impurities and dissolution of other solid impurities into the liquid phase. Ultimately, this process yielded monodisperse, high-crystallinity, acid-grade CaF2 nanomaterials. This study provided critical insights into the nano-structure control and transformation of hazardous FCS, thereby developing a sustainable approach to fluorine resource recovery.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Xiaokang Zhang,Li Zhang,Jing Chen,Xiangzhan Jiang,Yu Wei,Fei Xiao,Jinghui Hu,Jiawang Ding
Facing the escalating issue of industrial wastewater discharge and its profound environmental repercussions, the creation of novel sponge materials that excel in oil-water separation while incorporating flame retardancy becomes critically urgent. Despite their superior absorption capabilities, conventional oil-water separation sponges typically overlook flame retardant features, a limitation that curtails their applicability. To address this gap, we have developed a multifunctional hydrophobic sponge through a sophisticated multi-step chemical self-assembly process. This method grafts 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and perfluorinated compounds onto melamine foam (MF), yielding a composite material designated as DOPO-PF@MF. DOPO-PF@MF boasts a dual functionality of hydrophobicity and flame retardance. Its modified surface exhibits a pronounced hydrophobic-lipophilic balance, with a static water contact angle of 134°. It also displays favorable wetting characteristics towards various organic solvents, such as methanol, ethanol, dimethylformamide, dichloromethane, and hexane. This material demonstrates an impressive adsorption capacity for these solvents, with the adsorption-desorption capacity for ethanol remaining consistent over ten cycles. Furthermore, DOPO-PF@MF efficiently separates emulsions of methylene chloride and water, showcasing its versatility. Moreover, DOPO-PF@MF exhibits commendable chemical resilience under extreme temperatures, ranging from 0 °C to 100 °C, and withstands both acidic and alkaline conditions (pH 1–14), preserving its structural integrity against corrosive substances. Most notably, it surpasses unmodified melamine foam in flame retardancy. The incorporation of DOPO fortifies the material's resistance to high-temperature ignition, effectively inhibiting flame propagation and reducing burn rate, enhancing safety measures.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 9
·5091-5105
·
IF 1.674
Shi Xiang,Shi Hongxin,Wu Hongke,Shen HaiMin
A series of novel fluoroether-containing monomers has been designed and prepared based on the commercially available perfluoroalkyl ether acid fluoride. Treating acid fluoride with allyl alcohol, 2-hydroxyethyl methacrylate or N -allylmethylamine allowed for the direct formation of corresponding vinyl-containing fluorinated monomers. High yields of the fluorinated epoxy monomers could be obtained from acid chloride with glycidol; meanwhile, fluorinated diol was prepared from diethanolamine or 3-amino-1,2-propanediol. Moreover, fluorinated monoamine, fluorinated monoalcohol and fluorinated dichloride were also obtained. Most of these fluorinated monomers were liquid at room temperature and exhibited good solubility in common organic solvents.
研究领域:
有机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2017
·Vol. 1
·期 10
·2031-2038
·
IF 0
Zhenzhen Cai,Yuping Zhang,Yilong Song,Qiuli Cheng,Yang Zheng,Zhanchen Cui,Zuosen Shi,Changming Chen,Daming Zhang
In this paper, we report the design, synthesis, and optical properties of novel negative-type fluorinated polycarbonate photoresists (FPC-PRs) and their use in thermo-optic switches. The novel polymer films are readily fabricated by spin coating on a silicon wafer followed by irradiation with UV light and post-baking at 110 °C. These films exhibit low roughness, good thermal stability (Td, up to 292 °C), high transparency (up to 97.8% at 400 nm) and high refractive indices (RI, 1.583–1.512 at 1550 nm). Channel optical waveguide and MZI thermo-optic waveguide switch arrays were fabricated based on the direct UV-written technique using the FPC-PR 2. The propagation loss of the channel waveguide was only 0.17 dB cm−1 at 1550 nm. The rise and fall times of the device with an applied 500 Hz square-wave voltage were 837 μs and 381.8 μs, respectively. The applied electric power as the switching power was about 35 mW, and the extinction ratio was measured to be about 14.0 dB.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Shen Diao,Mingying Wang,Yuqiang Zhang
Vinyl silicone oil containing perfluorocyclobutyl aryl ether in the backbone (PFCB–VSO) was prepared by polycondensation of silane monomer containing perfluorocyclobutyl aryl ether (M 4 ), dimethyldimethoxysilane, and methyl vinyl dimethoxysilane in the acetic acid system. Fluorosilicone rubber was designed by using PFCB-VSO as a non-telechelic crosslinker. The effects of PFCB-VSO on the mechanical properties , thermal properties , and hydrophobic properties of fluorosilicone rubber were studied. The cross-link network of fluorosilicone rubber was investigated. The cross-link point was concentrated by the introduction of PFCB-VSO, which was demonstrated by cross-link density. The mechanical properties were enhanced by the growth of the non-telechelic cross-link network. The tensile strength was 10.35 MPa, the tear strength was 21.78 kN/m, and the elongation at break was 735%. The thermal stabilities and the hydrophobic properties of fluorosilicone rubber were increased by PFCB-VSO.
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
Coatings
·
2021
·Vol. 11
·期 4
·395
·
IF 2.881
Shouhua Su,Juan Wang,Chao Li,Jinfeng Yuan,Zhicheng Pan,Mingwang Pan
In the current leather market, waterproof leather occupies a large proportion, where waterproofness has become one of the important standards for leather selection. However, the most advanced fluorine-containing waterproofing agents on the market always have long chains of over eight carbons (C8), whose use has been restricted due to their bioaccumulation and recalcitrance in natural environment. Consequently, creating waterproof materials characterized by their environmentally friendly qualities and high performance is of great significance. Herein, we report a novel strategy for preparation of the fluorinated polyurethanes containing short branched fluorocarbon chains, and apply it in leather waterproofing. Because the fluorine-containing chain segments are enriched on the coating surface, the waterproof agent coating shows good hydrophobicity, low water absorption, high wear resistance and potential photodegradation of performances. Additionally, the water and oil proof performances of the coating are comparable to that of the marketed C8 waterproofing agent. Its solvent-resistant and antifouling performances are also outstanding. Therefore, the coating can meet the property requirements for daily use and has broad application prospects.Keywords:short branched fluorocarbon chain;fluorinated polyurethane (FPU);waterproof coating;leather surface modification
研究领域:
材料科学
·
环境科学
·
皮革化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 8
·1936
·
IF 5
Yajun Deng,Changan Zhang,Tao Zhang,Bo Wu,Yanmei Zhang,Jianhua Wu
Waterborne polyurethane are more eco-friendly materials due to lower volatile organic compounds (VOCs, mainly isocyanates) content than the alternative materials. However, these rich hydrophilic groups polymers have not yet reached good mechanical properties, durability and hydrophobicity behaviors. Therefore, hydrophobic waterborne polyurethane has become a research hotspot, attracting significant attention. In this work, firstly, a novel fluorine-containing polyether P(FPO/THF) was synthesized by cationic ring-opening polymerization of 2-(2,2,3,3-tetrafluoro-propoxymethyl)-oxirane (FPO) and tetrahydrofuran (THF). Secondly, fluorinated polymer P(FPO/THF), isophorone diisocyanate (IPDI) and hydroxy-terminated polyhedral oligomeric silsesquioxane (POSS-(OH)8) were used to prepare a new fluorinated waterborne polyurethane (FWPU). Hydroxy-terminated POSS-(OH)8was used as a cross-linking agent, while dimethylolpropionic acid (DMPA) and triethylamine (TEA) were used as a catalyst. Four kinds of waterborne polyurethanes (FWPU0, FWPU1, FWPU3, FWPU5) were obtained by adding different contents of POSS-(OH)8(0%, 1%, 3%, 5%). The structures of the monomers and polymers were verified by1H NMR and FT-IR, and the thermal stabilities of various waterborne polyurethanes were analyzed by thermogravimetric analyzer (TGA) and differential scanning calorimetry (DSC). As the results, the thermal analysis showed that the FWPU performed the good thermal stability and the glass transition temperature could reach at about −50 °C. The FWPU1 film exhibited that the elongation at break was 594.4 ± 3.6% and the tensile strength at break was 13.4 ± 0.7 MPa, elucidating that the FWPU1 film developed the excellent mechanical properties relative to the alternative FWPUs. Further, the FWPU5 film performed the promising properties, including the higher surface roughness of FWPU5 film (8.41 nm) obtained by the atomic force microscope (AFM) analysis, and the higher value of water contact angle (WCA) at 104.3 ± 2.7°. Those results illustrated that the novel POSS-based waterborne polyurethane FWPU containing a fluorine element could develop the excellent hydrophobicity and mechanical properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Shuo Wang,Pei Wang,Yunlong Sun,Jiyong Zhao,Zhipeng Wang
The rapid advancement of high-frequency communication networks has imposed more rigorous demands on the overall characteristics of dielectric materials. Poly(aryl ether ketone)s (PAEKs) are good candidate materials for applications in microelectronic devices due to their excellent thermal stability, mechanical properties, and chemical stability. In this work, we endeavored to incorporate large-volume fluorene structures into fluoro-PAEKs, employing strategies to enhance the polymer free volume and reduce polarizations in order to decrease the values of Dk and Df at high frequency. Therefore, a series of poly(ether ketone) (PEK-pOCFBPF-X) copolymers were designed and synthesized through nucleophilic polymerization using 4,4-difluorobenzophenone (DFK), phenolphthalein anilide-containing trifluoromethoxy groups (PPPBP-pOCF3), and a structurally ordered bisphenol fluorene (BPF) as the monomers. The results demonstrate that the introduction of BPF into fluoro-PAEKs resin leads to a low dielectric constant (2.713–2.782@10 GHz) and dielectric loss (0.00597–0.00825@10 GHz), as well as exceptional thermal properties (Tg = 232–240 °C, Td5% = 518–536 °C). Moreover, the copolymer exhibits high mechanical strength (tensile strength ≥ 81 MPa), minimal water absorption (≤0.0063), and excellent solubility. The incorporation of trifluoromethoxy and fluorenyl groups into copolymers significantly enhances the free volume fraction (5.5%–5.8%), resulting in a lower density and reduction in the dielectric constant. Simultaneously, by introducing C–F bonds with lower polarizability, the overall polarizability of the polymer is effectively diminished. These fluoro-PAEKs films, which exhibit superior thermal stability and a low dielectric constant, have great potential for applications in the high-performance flexible electronic packaging field and communication usage.
研究领域:
材料科学
·
电子工程
✓ 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）