JOURNAL OF DENTISTRY
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2025
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IF 5.5
Zhengyuan Yang,Huan Chen,Dan Feng,Zhaoying Liu,Zuosen Shi,Song Zhu
Objective The present study aims to address the negative impact of oral wet environments on the performance of light-curing composite resins by developing novel light-curing resin composites featuring dual hydrolytic resistance barriers. We evaluate their mechanical properties and hydrolysis resistance compared to Z250XT. Methods Urushiol-modified monomer (UMM) and Glass flake-KH570 were synthesized and incorporated into resin composites. Initially, resin matrix groups were prepared using UMM, with a control group that did not include UMM. These resin matrix groups were assessed for viscosity, degree of conversion (DC), polymerization shrinkage (PS), contact angle (CA), water sorption (Wsp), water solubility (Wsl), and mechanical properties to identify the optimal formulation. Subsequently, Glass flake-KH570 was added to the best-performing group in varying weight ratios, with Z250XT serving as the control group. The resin composite groups were evaluated for DC,PS,Wsp, Wsl, mechanical properties, and biocompatibility. Results The resin matrix containing UMM demonstrated lower viscosity, higher DC, reduced PS, increased CA, and decreased Wsp and Wsl compared to the control group. The optimal performance of the resin matrix was achieved at 15 wt % UMM. In experiments involving resin composites, the addition of Glass flake-KH570 resulted in lower Wsp and Wsl than Z250XT. Aging tests, supported by mechanical property measurements and scanning electron microscopy (SEM), indicated that UG65 exhibited superior mechanical properties and hydrolysis resistance compared to Z250XT. Conclusion The incorporation of UMM and Glass flake-KH570 into light-curing resin composites significantly enhanced their hydrolysis resistance, demonstrating strong potential for improving aging resistance in dental applications. Clinical Significance This novel resin composites demonstrate superior hydrolytic resistance compared to the commercial resin Z250XT, potentially offering a new approach to extending the service life of dental restorations.
研究领域:
牙科材料学
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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2025
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IF 3.5
Han Zeng,Maoqiang Bi,Zhonghe Tong,Yingtai Du,Xi Chen,Tianyan Jiang
In this study, the enhancement mechanism of SiO 2 modified by different silane coupling agents (SCA) on the moisture resistance, thermal properties and electrical insulation properties of epoxy resin (EP) composites is discussed. Through the combination of experimental tests and molecular dynamics (MD) simulations, the performance differences of five systems (EP, SiO 2 -EP, KH550 / SiO 2 -EP, KH560 / SiO 2 -EP, KH570 / SiO 2 -EP) in water absorption, glass transition temperature ( T g ) and volume resistivity are analyzed. The changes of free volume fraction (FFV), interaction energy, number of hydrogen bonds and diffusion behavior of water molecules are revealed from the microscopic point of view. The experimental results show that the introduction of modified SiO 2 significantly improves the moisture resistance, thermal properties and electrical properties of EP. Among them, KH550 modified SiO 2 has the best effect, T g increases by 12.3 %, volume resistivity increases by 22.1 %, and water absorption rate decreases by 21.9 % at 60 °C. MD simulations further confirm that the nano-SiO 2 modified by SCA can effectively limit the diffusion of water molecules and reduce the effect of temperature on the mean square displacement (MSD) of the system. The KH550 / SiO 2 -EP system has the smallest free volume and the highest number of hydrogen bonds, which effectively inhibits the diffusion of water molecules and the movement of molecular chains. This study provides a theoretical basis and material design strategy for the application of epoxy composites in hygrothermal environments.
研究领域:
高分子材料科学
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复合材料工程
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电气绝缘技术
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材料化学
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纳米功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2025
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IF 3.4
Muhammad Faisal Altaf,Bo Peng,Hafiz M. Irfan,Zhuang Miao,Ousseini Seidina Ousseini,Jixiang He,Ali Keçebaş,Yashar Aryanfar
The efficient separation of oil from complex industrial wastewaters, particularly hydraulic fracturing flowback, remains a critical environmental challenge. This study presents an innovative approach to utilizing cationic polyacrylamide (CPAM) synergistically modified with hydrophobic nano silica (SiO 2 ) and 3-(methacryloyloxy)propyltrimethoxy silane (KH570) to enhance oil/water separation efficiency. Comparative evaluation of unmodified CPAM against CPAM-SiO 2 -KH570 composites at varying SiO 2 loadings (10%, 13%, and 16%) revealed significant performance improvements. Unmodified CPAM achieved a peak transmittance of 89% at pH 7 (0.4 g/L), with reduced clarity in acidic and alkaline conditions. In contrast, the nano-modified composites demonstrated superior and more robust flocculation. The 10% SiO 2 composite exhibited excellent clarity (90-94% at pH 7) and the broadest dose tolerance (0.3-0.4 g/L), offering high operational flexibility. The 13% SiO composite achieved the highest and most robust clarity (95-98% at pH 7) over a broad dosage window (0.25-0.4 g/L), maintaining strong performance across varying pH, making it ideal for high-specification polishing. While the 16% SiO 2 composite delivered clarification (∼99%) at lower dosages (0.1-0.2 g/L), it exhibited a narrow optimal window and high pH sensitivity. These enhancements result from the hybrid flocculant’s increased hydrodynamic diameter 16-25 μm vs. ∼7 μm for CPAM and sustained positive charge. Additionally, stronger electrostatic and hydrophobic anchoring via the KH570 alkyl shell, combined with enhanced bridging capability due to rigid silica nodes, leads to more stable flocs. This research demonstrates that hydrophobic nano-modified CPAM offers a highly efficient, fast-kinetics, and structurally robust solution for oilfield wastewater treatment, enabling high separation efficiency with reduced chemical consumption and promoting sustainable water management practices.
研究领域:
环境工程
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化学工程
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纳米技术
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高分子科学
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水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Fei Lv,Kexin Liu,Zhuyi Wang,Jiefang Zhu,Yin Zhao,Shuai Yuan
The room and low-temperature performances of solid-state lithium batteries are crucial to expand their practical application. Polyethylene oxide (PEO) has received great attention as the most representative polymer electrolyte matrix. However, most PEO-based solid-state batteries need to operate at high temperature due to low room temperature ionic conductivity . Improving the ionic conductivity by adding plasticizers or reducing the crystallinity of PEO often compromises its mechanical strength . Here, an amorphous PEO-based composite solid-state electrolyte is obtained by ultraviolet (UV) polymerizing PEO and methacryloyloxypropyltrimethoxy silane (KH570)-modified SiO 2 which demonstrates both satisfactory mechanical performance and high ionic conductivity at room (3.37 × 10 −4 S cm −1 ) and low temperatures (1.73 × 10 −4 S cm −1 at 0 °C). In this electrolyte, the crystallinity of PEO is reduced through cross-linking, and therefore provides a fast Li + ions transfer area. Moreover, the KH570-modified SiO 2 inorganic particles promote the dissociation of lithium salts by Lewis acid centers to increase the ionic conductivity. Importantly, this kind of cross-linking networks endows the final electrolyte much higher mechanical strength than the pure PEO polymer electrolyte or PEO-inorganic filler blended systems. The solid-state LiFePO 4 /Li cell assembled with this electrolyte exhibits excellent cycling performance and high capacity at room and low temperatures.
研究领域:
材料科学
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电化学
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电池技术
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聚合物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2023
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IF 4.6
Yang Cao,Houde Cheng,Ning Gu,Kangtai Ou,Zhi Wang,Qianxiao Liu,Ruihua Guan,Qiang Fu,Youyi Sun
In a long-term working environment, the mechanical durability is still the highest challenge for their practical applications of superhydrophobic coatings. Here, a novel superhydrophobic coating is prepared and developed by the electrostatic spraying to improve mechanical durability. The superhydrophobic coating is composed of polyvinylidene fluoride (PVDF) and SiO 2 nanoparticles modified with n-octyltriethoxysilane (OTS) and γ-methacryloxypropyltrimethoxysilane (KH570). Interestingly, the water contact angle of the superhydrophobic coating increases from 155° to 161.7 o after 600 abrasion cycles, which is rarely reported in previous works. In addition, the superhydrophobic coating exhibits excellent adhesion strength (ca.6.0 MPa) and good anti-icing performance in extremely low temperature environments. The mechanism of above excellent performance is also investigated and proposed by molecular dynamics simulation . This work thus reports a new approach to design and fabricate high-performance superhydrophobic coating for various practical applications.
研究领域:
材料科学
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表面工程
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2022
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IF 4.966
Xulian Hu,Hu Wang,Zhaoxi Zhou,Chen,Maochun Hong,Heqing Fu
Microcapsules loading with healing agents are constantly used in engineered self-healing materials. But the synthesis of epoxy resin composites with excellent self-healing effect remains a major challenge. In this paper, 3-(Trimethoxysilyl)propyl methacrylate (KH570) was used to modify the nano silica (KHSI) for increasing lipophilicity . Then by using water-in-oil method, the inverse Pickering emulsion was stabilized by KHSI, and the core-shell double microcapsules (CS-DMics) loaded with different healing agents were formed via 1,1-Bis(acryloyloxymethyl)ethyl isocyanate (BEI). SEM and particle size statistical show that the size range of CS-DMics is 10–149.25 μm. Ultimately, the self-healing epoxy resin compound (Sh-ERC) was acquired by combining CS-DMics with epoxy resin substrate materials. The thermal properties, mechanical properties , self-healing properties and electrical conductivity were tested. It is found that Sh-ERC has perfect self-healing performance when the cracks occur and the microcapsules release healing agent for repairing. The self-healing effect of Sh-ERC is better with more CS-DMics content, and the self-healing efficiency is up to 86.5% when the content of CS-DMics is 40%. It has an excellent self-healing performance for engineering materials .
研究领域:
材料科学
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高分子化学
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复合材料
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自修复材料
✓ 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）