FIBERS AND POLYMERS
·
2015
·Vol. 16
·期 8
·1772-1780
·
IF 0.881
Zhou Yingsong,Yu Junrong,Wang Xuexin,Wang Yan,Zhu Jing,Hu Zuming
Melamine-formaldehyde/polyvinyl alcohol (MF/PVA) composite membranes modified by nano silica (SiO 2 ) and silane coupling agent KH570 modified SiO 2 (KH570-SiO 2 ) were prepared. The surface properties and morphology of KH570-SiO 2 were characterized using fourier transform infrared spectrometer (FTIR), thermogravimetric analysis (TGA), contact angle measurement instrument and X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and particle size analyzer. The morphology and properties of nanoparticles modified MF/PVA membranes were also studied with scanning electron microscopy (SEM), TGA, dynamic mechanical analysis (DMA) and tensile tester. The results show that KH570 is grafted on the surface of nano SiO 2 . KH570-SiO 2 has better dispersion in MF/PVA resin than that of unmodified SiO 2 . The thermal stability, mechanical and crystallizing properties of MF/PVA membrane are increased after modified with nano SiO 2 . KH570-SiO 2 makes MF more compatible with PVA resin, and further increases the mechanical properties and thermal stability of MF/PVA membrane.
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
Materials
·
2025
·Vol. 18
·期 6
·1205
·
IF 3.2
Qingsong Zhang,Huaqiang Sheng,Jinliang Li,Jinhu Li,Hao Zhang
In order to address the issue of wind leakage leading to spontaneous coal combustion in goafs during gob-side entry mining, a KH570 silane coupling agent (SCA)-modified vinyl acetate–ethylene (VAE)/cement-based flexible spraying sealing material was developed. The mechanical properties and wind leakage sealing performance of the material were evaluated using specialized testing equipment. Furthermore, molecular dynamics simulations and microstructural characterization techniques were utilized to assess and model the interface compatibility of the material. The experimental results demonstrate that KH570 significantly enhanced the material’s mechanical properties. Following modification, the material exhibited increases in the maximum tensile strength, compressive strength, and flexural strength by 53%, 38%, and 29%, respectively. KH570 not only promotes the formation of additional calcium silicate hydrate (C-S-H) gel through cement hydration, but also establishes Si-O-Si chemical bonds with cement hydration products and hydrogen bonds with the VAE emulsion. This functions as a “molecular bridge”, significantly enhancing the interface performance of the composite. The interaction between the organic and inorganic phases contributes to the formation of an interpenetrating network structure, imparting excellent compressive, flexural, and tensile deformation resistance to the material. The wind leakage of the spray-modified material was reduced by 2.7 times compared to the unmodified material, significantly improving its sealing performance under mining-induced pressure conditions. This enhancement effectively minimizes spontaneous combustion in mined-out coal areas caused by wind leakage, thereby ensuring safer mining operations.
研究领域:
材料科学
·
分子动力学
·
采矿工程
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chengmin Hou,Qi Gui,Jiaqi Song,Ze Fan
The application potential of superhydrophobic coatings is inherently constrained by their stability, durability, and apparent color characteristics. To address these limitations, a thin superhydrophobic coating was prepared on the surface of cotton fabric, featuring a micron mastoid structure with distinct fiber boundaries. This coating is achieved through the grafting of polymer poly (trifluoroethyl methacrylate-random-glycyl methacrylate) and 3-(trimethoxysilyl) propyl methacrylate modified SiO 2 nanoparticles onto the fabric surface. The chemical composition, thermal stability and micro/nano structure of the coating were evaluated by infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and scanning electron microscopy. The superhydrophobic coating not only exhibits exceptional oil-water separation capabilities, achieving a remarkable separation efficiency of 98%, but also ensures high reusability, enduring up to 10 consecutive oil-water separation cycles without significant performance degradation. Furthermore, the coating manifests mechanical stability and durability, maintaining its superhydrophobic nature even after undergoing rigorous mechanical abrasion, immersion in acidic and alkaline solutions, as well as exposure to elevated temperatures. In addition, an in-depth analysis was conducted to evaluate the influence of this superhydrophobic modification on the inherent characteristics of cotton fabric, specifically its color, whiteness, and gloss. The findings reveal that the hue of the cotton fabric remains unaltered, while a marginal enhancement in whiteness and a slight reduction in gloss are observed post-modification, indicating small impact on the inherent characteristics of cotton fabric.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Lili Wang,Rumeng Li,Chenglong Wang,Bairan Hao,Jianzhong Shao
A series of reactive TiO 2 pigments with olefinic double-bonds were prepared by grafting modification of silane coupler KH570 to be covalently anchored in the blue-light curing film, which improved the color fastness to crocking of the printed fabrics significantly. Effects of KH570 concentrations on particle size, surface wettability and dispersing stability of KH570-TiO 2 pigments, photo-polymerization of KH570-TiO 2 bule-light curing inks and tensile properties of curing films were investigated. Color fastness to crocking of KH570-TiO 2 pigment on cotton fabric was explored. Results showed that compared to the native TiO 2 , all the properties of KH570-TiO 2 improved. With the increases of KH570 concentrations, the grafting degrees of KH570-TiO 2 had gradual increase. The surface hydrophobicity and dispersion stability of KH570-TiO 2 pigments, photo-polymerization of KH570-TiO 2 blue-light curing ink and tensile properties of curing films enhanced, especially those of 12∼20KH570-TiO 2 the best. Within the concentrations of KH570 12–20 wt %, the printed fabrics had dry/wet color fastness to crocking no less than 4 grades.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FERROELECTRICS
·
2020
·
IF 0.669
Chen-Qi Zhang,Qiao-Hong Peng,Song Wang,Lin Guo,Hai-Lin Cong,You-Qing Shen,Bing Yu
High-performance liquid chromatography (HPLC) is one of the most widely used separations and analysis methods, which has become an indispensable part of the separation and detection of mixtures, qualitative and quantitative analysis and other scientific research and social production fields. Because of the decisive effect of the chromatographic column on analysis and separation, it has become the core of research in the chromatographic system. In the past decades, the research and development of new chromatographic column stationary phase have been highly concerned. Monodisperse polymer microsphere, because of its special large pore structure, has good permeability and high specific surface area, which can be used as special materials in various fields, such as adsorption materials in the separation process, HPLC column packing, catalyst carrier, preparation template of nanomaterials and nuclear fusion targeting materials. When it is used in HPLC, because of the good permeability of microspheres, it can effectively improve the separation efficiency and performance. In this article, based on the previous work, a number of new polymer microspheres were prepared, and the prepared microspheres were used for the separation and detection of HPLC, and their physical and chemical properties were studied.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITE INTERFACES
·
2022
·
IF 2.839
Zhigang Liu,Yuantao Xie,Lirong Yang,Chunmei Wang,Xiaoxin Feng,Zezheng Tang,Yaxin Yu
The polypropylene (PP) fibers were modified by silane coupling agent (KH570) or synergistically modified by KH570 and nano-SiO2 in this paper. The modification effect of PP fibers was evaluated by SEM and FTIR. The reinforcing effect of PP fibers and the modified PP fibers on sulphoaluminate cement-gypsum composites (SGC) was investigated. The results show that KH570 can undergo an autohydrolysis reaction and wrap on the surface of the PP fibers, which makes the hydrophilicity of PP fibers improved. Nano-SiO2 can further improve the hydrophilicity and roughness of the PP fiber surface by polycondensation reaction with KH570. KH570 and nano-SiO2 synergistically modified PP (KH570-SiO2-PP) fibers obviously increase the compressive strength and flexural strength of the hardened SGC compared with PP fibers or KH570 modified PP (KH570-PP) fibers. The SEM images show that PP-KH570-SiO2 fibers have better adhesion with the matrix than PP fibers and KH570- PP fibers.
研究领域:
材料科学
·
建筑工程
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2025
·
IF 3.1
Maoqiang Bi,Han Zeng,Zhonghe Tong,Rui Qiu,Xi Chen,Tianyan Jiang
Room-temperature-vulcanized (RTV) silicone rubber coatings are widely used on outdoor insulators for their excellent anti-pollution flashover performance. However, under hot and humid climates, algal fouling severely deteriorates their surface insulation properties. In this study, a KH570-modified TiO2/RTV composite coating is developed to simultaneously enhance antifouling and electrical performance. The influence of nano-TiO2 particles on the photocatalytic algal inhibition and electrical insulation performance of the composite coatings is systematically studied using SEM, photocatalytic degradation tests, algal cell mortality measurements, resistivity and dielectric tests, flashover voltage determination, and leakage current analysis. The results show that after 8 hours of UV irradiation, the photocatalytic degradation rates of the pristine RTV, 1 wt% RTV, 3 wt% RTV, and 5 wt% RTV coatings reach 17.37%, 92.11%, 93.16%, and 96.22%, respectively. The incorporation of KH570-TiO₂ endows RTV with photocatalytic capability to inhibit algal growth, with the 5 wt% RTV sample achieving an algal cell mortality rate of 84.19% after 96 hours of cultivation under simulated natural environmental conditions. In addition, doping with KH570-TiO₂ enhances the electrical properties of RTV, with maximum increases in surface and volume resistivity of 8.36% and 15.64%, respectively. After simulated cultivation with green algae for 96 hours, the wet flashover voltage of the 5 wt% RTV sample increases by 8.1 kV compared with the pristine RTV. The findings provide a feasible strategy for integrating photocatalytic antifouling and insulation reinforcement in RTV coatings, addressing biological contamination and flashover degradation under humid conditions.
研究领域:
材料科学
·
电气工程
·
环境功能材料
·
聚合物复合材料
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan Cheng,Feng Feng,Tianxue Zhu,Yanhui Zheng,Yukui Gou,Dapeng Yang,Jianying Huang,Yuekun Lai,Zhongyi Jiang
In recent years, the demand for transparent substrates (e.g. windows, mirrors and photovoltaic glass) with anti-fogging performances has increased, while conventional anti-fogging coatings, like single-component organic coatings (PVA, PAA, PAAm), show poor stability and cannot maintain their performance stably under harsh environments. In this work, KH570@TiO 2 plays the role of a bottom layer (KT coating) to increase roughness and binding, where the hydrolysis of KH570 anchors the substrate and provides active sites for the binding of the top coating, and the addition of the TiO 2 enhances UV shielding properties. A composite PVA-AAm-POSS-NH 2 gel (PAP coating) served as the top layer, which contains a large number of hydrophilic groups and thus endow the composite coating with satisfactory anti-fogging performance. The strong bonding force provided by the KT coating and the tight physical entanglement of the PAP coating endow the double-layer coating (PAPKT coating) stable anti-fogging performance (60 times of tape peeling test, 100 times of sandpaper friction test, and sand-punching test), and 48 s icing delay performance. The multi-performances make this work great potential in automotive glass as well as building facades to cope with complex situations.
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
ENERGY & FUELS
·
2024
·
IF 5.2
Xiao Zhang,Zhanyi Wang,Jianan Deng,Honghao Zhao,Yuan Zhuang,Ziyi Zhang,Xiuxia Sun,Haoyu Lian,Miao Han,Yongjun Tian
In recent years, new technologies involving self-suspending proppant (SSP), which improves proppant distribution, reduces the use of chemicals in fracturing fluids, and simplifies the fracturing construction process, have become a focus of hydraulic fracturing research. However, the available products have poor suspension stability, cannot withstand high temperature and salt environments, and are highly damaging to reservoirs. In this study, we presented a novel self-suspending (HTS-SSP) proppant with excellent suspension stability, temperature resistance, and salt resistance, prepared from quartz sand, silane coupling agent, and modified polyacrylamide to achieve these properties. Wettability tests, surface morphology analysis, and Fourier transform infrared spectroscopy analysis proved that 3-methacryloxypropyltrmethoxysilane (KH570) successfully modifies quartz sand, and the HTS-SSP was synthesized. In terms of the suspension performance, HTS-SSP exhibited exceptional suspension stability due to the incorporation of KH570. It remained suspended at 150 °C or 24 wt % brine and showed excellent temperature and salt resistance. The gel-breaking fluid of the surface polymer of HTS-SSP had low damage to the reservoir, much less than the guar gum fluid. The difference between the conductivity of the aggregate remaining after HTS-SSP gel-breaking and that of unmodified quartz sand was not significant. The synthesized HTS-SSP demonstrates outstanding comprehensive performance and is an ideal candidate for reservoir development under harsh temperature and salinity conditions.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 4
·045310
·
IF 1.449
Jianping Li,Huiming Guo,Anqi Wei,Jingzhe Jiang,Yue Ji,Huijun Qiang,Yan Jiang,Hongwen Zhang,Hongbo Liu
In this study, blue-emitting carbon quantum dots (CQDs) have been directly synthesized via an ultrasonic method using starch soluble as the carbon source. The CQDs were modified by using γ-methacryloxy propyl trimethoxyl silane (KH570). The modified CQDs were then combined with silicone rubber (SR) through a hydrosilylation reaction to fabricate CQDs/SR composites. The results indicated that the average size of the as-prepared CQDs was approximately 2.6 nm, with a distribution between 1.0 and 4.0 nm. The CQDs modified by KH570 were well dispersed in the SR, which can effectively prevent the fluorescence quenching of the CQDs due to agglomeration. Remarkably, the as-prepared CQDs/SR composites emitting bright blue fluorescence have high transparency, great mechanical properties and good thermal stability, thereby facilitating enormous potential applications in a wide variety of fields such as optoelectronic devices and LEDs.
研究领域:
材料科学
·
光学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Hao Yanjun,Zheng Xuecheng,Fan Wei,Chen Siqi,Ye Zhongbin,Tai Lei
In view of the extremely developed bedding of shale formations, which are dominated by micro-nano pores and fractures, traditional sealing agents make it difficult to produce a tight seal on shale formations due to their huge particle sizes. Combining the bridging effect of inorganic nanoparticles and the deformation properties of organic particles, this article synthesized a core-shell structure nano-blocking agent through emulsion polymerization, which was called P(MMA-St-BD)/KH570-SiO 2 . The structure of the synthesized nano-plugging agent was characterized utilizing Fourier transform infrared spectroscopy (FT-IR), particle size distribution, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). Performance characterization was carried out through the effect of nano-blocking agents on emulsion stability, rheological properties, microporous filter membrane plugging experiments, and core pressure-bearing capacity tests. The findings demonstrate that P(MMA-St-BD)/KH570-SiO 2 ’s structure satisfies design specifications, and that the nano-plugging agent has outstanding thermal stability, homogeneous particle size distribution, and good dispersion. Its decomposition temperature also exceeds 400 °C. This study analyzed the plugging efficiency of nano-blocking agents from the temperature perspective, indicating that the nano-blocking agents seal shale formations tightly. Ultimately, through mechanism analysis, nanomaterials can squeeze and deform through the polymer shell and enter the shale micropores and micro-cracks for sealing, forming a high-strength sealing zone.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Composites Science
·
2025
·Vol. 9
·期 5
·252
·
IF 3.7
Ting Zhang,Xujiang Chao,Junhao Liang,Bin Wang,Mengmeng Sun
This study investigates the mechanical performance of epoxy resin composites reinforced with silane coupling agent-modified Al2O3nanoparticles (m-Nano-Al2O3/epoxy). Three silane coupling agents (KH550, KH560, and KH570) were employed to functionalize the Al2O3nanoparticles, and their chemical structures were confirmed via Fourier transform infrared spectroscopy (FTIR). The microstructure and elemental distribution of the composites were characterized using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Mechanical properties, including tensile strength and hardness, were evaluated using a universal testing machine and a Rockwell hardness tester, respectively. The incorporation of m-Nano-Al2O3significantly enhances the mechanical properties of the epoxy matrix. Compared to pure epoxy, the KH570-modified composites demonstrate a remarkable 49.1% improvement in tensile strength and an 8.8% increase in hardness. These findings highlight the potential of surface-modified Al2O3nanoparticles as effective reinforcements for high-performance epoxy composites.
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）