Journal of the Australian Ceramic Society
·
2023
·Vol. 59
·期 4
·915-922
·
IF 1.9
Zhang Jianxiong
ZrO 2 is widely used. However, surface hydrophilicity is harmful to waterproof devices. In this work, epoxy-based polyhedral oligomeric silsesquioxane (POSS) was chemically bonded to ZrO 2 sheet surface for weather-resistant hydrophobicity and anti-adherence property. First, ZrO 2 sheet was modified with hydroxyls, followed by amino modification. Then, surface POSS modification was performed via ring-opening addition. Next, composition and micro-morphology of POSS-treated sheet were clarified. Ultimately, the dependence of water contact angle of POSS-modified sheet on POSS solution treating time was researched, and the highest contact angle of 132.6° was gained by 24-h treating. Acid corrosion, alkali corrosion, and ultraviolet radiation for 48 h were employed to verify good weather resistance with contact angles over 120°. POSS-modified sheet had good anti-adherence capacity. Cooperation of POSS and ZrO 2 was utilized to obtain low surface energy and high surface roughness. This work might help to obtain hydrophobic ceramics as catalyst supports for oil-phase reactions.
研究领域:
材料科学
·
表面化学
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 5
·1507-1515
·
IF 3.2
Heng Li,Fang-Yu Ren,Hong-Ru Li,Liang-Nian He
Biomass-based polymers and their property regulation using functional materials have attracted much interest. In this work, ricinoleic acid-derived cyclic carbonate was prepared and applied to the synthesis of nonisocyanate polyurethane (NIPU) with aliphatic diamine, in which octa(aminopropyl) polyhedral oligomeric silsesquioxane (OAP-POSS) was incorporated as polyamine to partially or totally substitutes for the diamine to introduce POSS units into the polymer thus regulating the properties of the resultant material. In the curing process, Fourier transform infrared spectroscopy (FT-IR) was used to track the reaction and curing at 50°C for 12 h was found to be sufficient for the polymerization. A series of POSS modified NIPUs were obtained by altering the molar fraction of OAP-POSS in total amine components and the material with the highest thermal stability, shore hardness and water resistance was accessed with 100% substitution of OAP-POSS for diamine.
研究领域:
材料科学
·
生物质化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55936
·
IF 2.7
Guang-Zhao Li,Hao Yu,Hongwei Zhang,Rui Han,Pan He,Jiaxuan Cao,Qian Lu,Gen Liu,Gang Chen,Wenyan Wang,Weicai Wan,Yujun Wei,Shuai Zhang
This work investigated the composites (PA6/BF) made of basalt fiber (BF) and nylon 6. To improve the interfacial bonding between the fibers and the polymer matrix, and to enhance the thermal and mechanical properties of the composites, polyhedral oligosilsesquioxanes (POSS) with epoxide groups was introduced to modify the surface of BFs using the slurry coating method. It is revealed that the mechanical properties of the composites increased and then decreased with increasing POSS coating. The composite PA6/BF-POSS3 with BFs modified with a POSS solution of 3.0 wt% showed the best properties. The tensile strength of PA6/BF-POSS3 was 130.8 MPa, 26.4% higher than that of the PA6/BF and 126.3% higher than that of neat PA6. In addition, PA6/BF-POSS3 exhibited a 5% weight loss temperature of 417.7, 35.6°C higher than that of PA6/BF. The chemical bonding formed between the amide and epoxide groups, and the hydrogen bonding formed between the amide groups and hydroxyl groups were believed to be the main reasons for the improved interfacial interaction and improved properties.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Chengyu Shi,Jianli Wang,Ying Zhou,Xinyuan Lu,Gang Chang,Aizhao Pan,Ling He
Cultural relics reflect the vitality and creativity of human beings but are being irreversibly damaged with the current protective materials exhibiting high brittleness , easy crack and unsatisfactory protection. We fabricated a POSS-based polymer POSS- g -(PGMA- co -PFMA) 2 with high transparency, high hydrophobicity and adhesive nature by SI-ATRP. In addition to reducing the phase separation during film formation, the POSS-based polymer also improved the transparency (up to 99 %). The protected sandstone presented almost no changes (ΔΕ ⁎ = 1.34) on the chroma compared to the pristine sandstone. The polymer showed good surface hydrophobicity (glass: 100–105°; sandstone: 131°) and adhesive properties (0.44–2.59 MPa) which varied based on solvents. With increasing GMA content, there was gradual increase in the adhesive strength (0.59–2.68 MPa). Meanwhile, the POSS- g -(PGMA- co -PFMA) 2 film presented excellent freeze-thaw resistance and salt tolerance. As a kind of hydrophobic and bonding coating material suitable for harsh environments with high hydrophobic, high transparency, high thermal stability , and durability, it provides a new solution to solve the severe problem of cultural relics protection with a wide application prospect.
研究领域:
材料科学
·
文化遗产保护
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Mei Chen,Yuming Chen,Wei Li,Peng Liang,Congjing Ren,Binbo Jiang,Jingdai Wang,Yongrong Yang
A facilely catalytic approach to prepare weakly entangled ultra-high-molecular-weight polyethylene (UHMWPE) with a fine particle size is reported with the polyhedral oligomeric silsesquioxane (POSS)-modified MgCl2-based Ziegler–Natta catalyst. CO in situ FTIR spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and N2 adsorption and desorption experiments revealed that the POSSs can coordinate with the MgCl2(110) plane, acting as adhesives with a cage structure to be in situ embedded into the MgCl2-based support. This in situ embedding of POSS facilitated the uniform dispersion of POSS nanoparticles, contributing the isolation effect for active TiCl4 sites in the molecular scale, thus synthesizing the weakly entangled UHMWPE with exceptional activities. Simultaneously, the MgCl2-based catalysts afforded UHMWPE particles with small sizes, where POSS-modified catalysts brought the UHMWPE particle size down to below 200 μm, thanks to their considerable activities. To the best of our knowledge, this is the first time that nascent UHMWPE with a less entangled state and a fine particle size was synthesized. This combination of structural advantages enables substantial improvements in the toughness/stiffness/strength balance of nascent UHMWPE, especially for the impact strength which can reach 113.6 kJ/m2 with a relatively low molecular weight.
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
JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 50
·期 5
·2158-2166
·
IF 2.305
Ma Yanli,He Ling,Pan Aizhao,Zhao Chengben
The novel latex of P(GMA-POSS)- co -PMMA is synthesized for coatings by glycidyl methacrylate polyhedral oligomeric silsesquioxane (GMA-POSS) and methyl methacrylate (MMA). First, GMA-POSS is prepared by the epoxide opening reaction of glycidyl methacrylate (GMA) and aminopropyllsobutyl POSS (NH 2 -POSS). Then, the as-obtained GMA-POSS monomer is directly used for emulsion polymerization with MMA to obtain P(GMA-POSS)- co -PMMA latex. The chemical structure of P(GMA-POSS)- co -PMMA latex is characterized. The core–shell morphology of latex is proved to distribute uniform spherical particles as 20–60 nm in diameter. The effect of POSS content on the properties of film casting from P(GMA-POSS)- co -PMMA latex is studied for surface roughness, static contact angle, thermostability, and universal mechanical testing. The introducing of POSS into latex leads to an increase of P(GMA-POSS)- co -PMMA in the hydrophobicity, adhesive strength, thermal and mechanical proprieties. When GMA-POSS amount is controlled at 33 wt%, the glass transition temperature ( T
g ) and static contact angle are increased into 130 °C and 102º, respectively, and the adhesion to the substrate is raised to 477.2 MPa. Therefore, P(GMA-POSS)- co -PMMA is promising to be suggested as coating material.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
DENTAL MATERIALS
·
2025
·
IF 6.3
Qingyang Zhou,Jiwei Lin,Qifang Li
Objectives The aim of this study was to develop a new composite resin to solve the problem of volume shrinkage of conventional dental restorative composite resins during the curing process in order to improve their mechanical properties and reduce the risk of restoration failure. Methods We synthesized the mercapto-alkenyl click chemical reaction product (MN-POSS) of acrylate-based POSS (MAP-POSS) with N-Acetylcysteine (NAC) using a bifunctional polysilsesquioxane modification technique and improved its dispersion in the resin matrix by physicochemical methods. In addition, methacrylate-based epoxy POSS (ME-POSS) was further synthesized and used to modify acrylate dental resins to form a free radical-cation hybrid light-curing system. Results The results showed that the composites modified with MN-POSS significantly improved mechanical strength, while the application of ME-POSS effectively reduced polymerization shrinkage, improved the water absorption and dissolution properties of the materials, and enhanced mechanical properties and hardness. This study provides new ideas and material solutions to improve the performance of dental restorative materials. Significance Both of these improved solutions demonstrate the potential of bifunctional POSS as a modified filler, providing new ideas and methods for the design of future dental restorative materials.
研究领域:
材料科学
·
牙医学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2016
·
IF 3.586
Siyu Chen,Longhai Guo,Dianxin Du,Jianling Rui,Teng Qiu,Jun Ye,Xiaoyu Li
A feasible co-endcapping strategy has been developed for the synthesis of monofunctional polyhedral oligomeric silsesquioxanes (POSS) modified waterborne polyurethane (WPU). The work starts from the synthesis of di-isocyanate terminated PU prepolymer from isophorone di-isocyanate (IPDI), poly (1,4-butylene adipate) end-capped diol (PBAD), and 2,2- bis (hydroxymethyl) butyric acid (DMBA). The two kinds of modifiers of monofunctional aminopropyl isobutyl POSS (AIPOSS) and with (3-aminopropyl) triethoxysilane (APTES) were used together to block the PU chains. The hybrid dispersions of curable silane-co-modified WPU with 2–8 wt% of AIRPOSS could form continuous and homogenous films under ambient conditions. The morphology and structure of the dispersed particles and the films were characterized, as well as the mechanical property and surface performance. The results indicate that the incorporation of POSS moieties into the silane-modified PU can significantly improve the mechanical property of the films and the formation of additional physical crosslinking points upon the chemical crosslinking networks. Moreover, both the surface hydrophobicity and the dielectric performance have been promoted by the incorporation of POSS. Furthermore, fluorinated groups were introduced on the films by the treatment of the fluorosilane coupling agent. The fluoro-POSS-PU hybrid films exhibit notable surface hydrophobicity as well as low dielectric constant and loss.
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
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 47
·18601-18610
·
IF 3.069
Siwen Xia,Yu Yang,Changli Lü
Functionalized two-dimensional graphene oxide sheets and their inorganic–organic nanohybrids have aroused great interest because of their excellent synergetic effect on metal-based nanocatalyst PdNPs supported on highly hydrophilic quaternized polyhedral oligomeric silsesquioxane (QPOSS) functionalized reduced graphene oxide (rGO) and were successfully constructed as a nanohybrid catalyst for efficient heterogeneous catalytic reactions. Octaammonium POSS (OAPOSS) was first covalently grafted to carboxylated GO nanosheets through an amidation reaction, and then the OAPOSS decorated on rGO nanosheets was quaternized with glycidyltrimethylammonium chloride (GDTMAC) via an epoxide ring-opening reaction to obtain a highly functional hydrophilic QPOSS@rGO hybrid. Finally, the PdNPs were loaded onto QPOSS@rGO nanosheets through an in situ reduction route. The quaternary ammonium groups on QPOSS@rGO can strongly coordinate with PdNPs, making it particularly advantageous for stabilizing PdNPs and preventing the leaching of Pd metals. Compared to the PdNPs@rGO catalyst without modification with hydrophilic QPOSS, the low-dose PdNPs@QPOSS@rGO nanocatalysts exhibited outstanding catalytic efficiency in the reduction of methylene blue and nitrophenols. In addition, the as-designed nanocatalysts also showed high catalytic activity for the Suzuki coupling reaction when utilizing pure water as a green solvent. It was proved that QPOSS and rGO can synergistically catalyze and promote the diffusion of reactants. In particular, the PdNPs@QPOSS@rGO nanohybrid catalyst showed no significant loss of catalytic activity after reusing it five times. Our results demonstrated that highly hydrophilic QPOSS endows the resulting PdNPs@QPOSS@rGO nanohybrid with good dispersibility and stability in water, which remarkably further improves the catalytic activity of the nanocatalyst.
研究领域:
材料科学
·
催化化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 51
·2208676
·
IF 19.924
Bo Pang,Zuquan Jin,Yunsheng Zhang,Zhiyong Liu,Wei She,Penggang Wang,Yong Yu,Xiaoying Zhang,Chuansheng Xiong,Ning Li,Guowen Sun,Peng Zhao,Guojian Liu,Xiaoyun Song,Song Gao
Cement-based sensors (CBSs) have demonstrated potential in structural health monitoring (SHM) despite rare applications due to their poor flexibility and sensing accuracy/protection with robustness. Herein, a promising strategy is reported to design a waterborne epoxy resin (WEP)-modified cement-based composite coating sensorcapable of simultaneous stable SHM and durable protection. The interpenetrating network (IPN) formed by WEP within cement paste is bionic to the toughness and crack resistance of biological muscle tissue and balances the ion permeation performance and polarization of hydration products. The polymerization-redispersion progress and mechanism of calcium silicate hydrate (C-S-H) gel modified with [3-(2-aminoethylamino)-propyl]trimethoxysilane silsesquioxane (C-POSS) are characterized and revealed. The results show that the muscle-like IPN increases the cement-based coatings’ maximum deflection angle to 30° and improves the monitoring accuracy of compressive, tensile, and fatigue microchanges of concrete structures to more than 95%. The POSS···Ca 2+ ···C-S-H interaction in C-POSS partially transferred the intra-adhesive hydrogen bonds surrounding the nanoconducer into electrostatic bridging ones to maintain an excellent electromechanical conductive dispersion.
研究领域:
土木工程
·
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yanjie Zheng,Junyan Cui,Ying He,Lei Sun,Yanbao Zhao,Xia Zhang
Superamphiphobic materials exhibit broader applications and possess greater potential compared to their superhydrophobic counterparts. Therefore, it is crucial for superamphiphobic coatings to exhibit applications while maintaining a long service life. To address this challenge, the surface of natural clay kaolin particles was modified through the reaction of ethyl orthosilicate and 1 H, 1 H, 2 H, 2 H -perfluorodecyl triethoxysilane to form organic-inorganic cage fluorinated polyhedral oligomeric silsesquioxane (fluoroPOS) modifiers. Subsequently, antimicrobial ZnO nanoparticles were prepared in situ using hydrothermal methods . Finally, a durable superamphiphobic coating was achieved by physical blending of a polydimethylsiloxane (PDMS) solution with the superamphiphobic powder. Experimental results demonstrate that the as-prepared ZnO/kaolin@fluoroPOS/PDMS coatings are resistant to water, milk, coffee, soy sauce, tea, sunflower oil , lubricant base oils, and other everyday liquids at contact angles greater than 150 degrees, demonstrating superior superamphiphobic and self-cleaning properties. Moreover, the coatings can withstand harsh external environments such as strong acid and alkali chemical corrosion, high temperature heating, photo-radiation aging, mechanical friction and wear, and show good durability. More importantly, the low surface energy fluoroPOS can spontaneously migrate from the interior of the coating to the surface when exposed to heat, thus restoring their impaired superamphiphobic properties. The coatings also have good antimicrobial adhesion due to the incorporation of ZnO nanoparticles . In addition, coatings can be fabricated on a variety of soft and hard substrate materials, such as cotton fabrics, sponges, aluminum sheets, and wood. Therefore, the repairable and durable superamphiphobic antifouling coatings constructed in this study are expected to find applications in many areas, such as building coatings, oil and gas pipelines, fluid drag reduction, and biological anti-corrosion.
研究领域:
材料科学
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表面工程
·
纳米技术
·
化学工程
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 4
·1190-1201
·
IF 3.348
Yanling Feng,Wei Wu,Zhengyi Wang,Tianyu Zhao
An innovative phosphorus-silicone flame retardant (KAPP-OGPOSS) was prepared by grafting octa (propyl glycidyl ether) polyhedral oligomeric silsesquioxane (OGPOSS) on ammonium polyphosphate (APP) through silane coupling agent (KH-550). The chemical structure, morphology, flame retardancy, and mechanism of the obtained materials were comprehensively investigated. TG results demonstrated that EP with 15 wt% KAPP-OGPOSS produced a char residue of 42.6% at 700°C, which is three times that of pure EP. The flame retardant tests showed that the limiting oxygen index value of EP/15 wt% KAPP-OGPOSS was 30.6% (67.7% higher than that of neat EP) and its UL-94 grade reached to V-0 rating. Cone calorimeter testing indicated that the incorporation of 15 wt% KAPP-OGPOSS to EP significantly reduced heat, smoke, CO, and CO 2 release by 79%, 83%, 80%, and 82.5%, respectively. The modification of APP with OGPOSS was also beneficial for the improvement of the char yield and density of char. A flame retardant mechanism was revealed according to the investigation into the char residue. This modified approach provided an innovative yet practical means of enhancing the flame retardant properties of EP.
研究领域:
材料科学
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高分子化学
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消防安全工程
✓ 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）