Case Studies in Construction Materials
·
2025
·
IF 6.6
Miaomiao Ma,Jingyao Ma
To address the issue of insufficient mechanical properties in conventional hydrogels that limit their marine antifouling applications, we innovatively proposed a construction strategy of titanium dioxide (TiO 2 ) nanoparticles reinforced polyethylene glycol (PEG) hydrogels. The TiO 2 -PEG hydrogel with uniformly dispersed nanoparticles were successfully prepared by in-situ polymerization, and the material showed excellent mechanical properties. When the content of TiO 2 is 0.5 wt%, the tensile strength of the TiO 2 -PEG hydrogel can reach 0.97 MPa, which is 68.5 % higher than that of the PEG hydrogel. CLSM analysis shows that TiO 2 nanoparticles effectively enhance the mechanical properties of hydrogels by inducing crack deflection and energy dissipation mechanism. Notably, TiO 2 -PEG hydrogel also has a broad-spectrum antifouling performance, which can effectively resist protein adsorption and adhesion of Escherichia coli, Staphylococcus aureus and diatoms. The structure-property relationship demonstrated that TiO 2 enhanced the TiO 2 -PEG mechanical properties, which inhibited its detachment from the substrate and thereby significantly improved the antifouling durability. This study not only provides new ideas for the design of high-performance marine anti fouling materials, but also provides theoretical basis and practical support for achieving synergistic enhancement of anti fouling performance and mechanical performance.
研究领域:
材料科学
·
海洋技术
·
高分子科学
·
纳米技术
·
表面工程
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2013
·Vol. 22
·期 3
·363-367
·
IF 0
Zhenfeng Diao,Bin Li,Bing Yu,Anhua Liu,Liangnian He
The selective aerobic oxidation of alkynes to corresponding α,β-acetylenic ketones was achieved in polyethylene glycol/dense CO 2 /O 2 biphasic system without any catalyst or additive. The effects of reaction parameters, e.g. temperature, CO 2 pressure, PEG molecular weight and loading on the reaction were carefully examined. Moreover, various substrates worked well in the presence of PEG1000 under 5 MPa of CO 2 and 2 MPa of O 2 at 100 °C for 12 to 24 h and acceptable yield and selectivity could be obtained in most cases. Preliminary mechanistic investigations were also discussed.
研究领域:
有机化学
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绿色化学
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氧化催化
·
可持续溶剂
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DOI
LANGMUIR
·
2017
·
IF 3.833
Zhen Wang,Jiaqi Song,Shiming Zhang,Xiao-Qi Xu,Yapei Wang
One-step double emulsions via only one-step emulsification are leading to an attractive branch of emulsion research studies owing to the ease of preparation and reduced surfactant numbers. In addition to controlling the oil/water ratio, exploiting emulsifiers with desirable amphiphilicity that can stabilize both the inner and outer water/oil interfaces is crucial to the formation of one-step double emulsions. In particular, new emulsifiers with saving laborious efforts are highly preferred in consideration of low cost and practical applications. In this work, a commonly used homopolymer, polyethylene glycol (PEG), was attempted as emulsifiers to prepare emulsions via one-step emulsification. PEG is generally considered as a hydrophilic polymer and always anchored with a hydrophobic polymer to make the copolymer amphiphilic. In the water–chloroform binary system, PEG itself exhibits amphiphilic performance and tailors the formation of single emulsions or double W/O/W emulsions on the dependence of the oil/water ratio and the PEG concentration. A possible mechanism as explained by dissipative particle dynamics simulation was proposed to demonstrate the amphiphilic feature and emulsification capability of PEG. The amphiphilicity of PEG was further tuned by interacting with iodine as a result of the formation of a supramolecular complex, which, in turn, led to the conversion from single emulsions to O/W/O double emulsions. It is believed that this line of research provides inspiration for the preparation of controllable emulsions through supramolecular routes.
研究领域:
胶体与界面科学
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高分子科学
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超分子化学
·
乳液技术
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DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·19545
·
IF 4.011
Liu Juan,Chen RiQing,Wang ChunPeng,Zhao YongJun,Chu FuXiang
A series of phenol-formaldehyde-polyethylene glycol polyether polyols (PF-PEGs) were synthesized through the condensation polymerization and etherification of phenol, formaldehyde, and poly(ethylene glycol) (PEG) under alkaline conditions and subsequently reacted with 1,6-hexamethylene diisocyanate to obtain polyurethane (PU) films using acetone as solvents. The influence of phenol and formaldehyde to PEG mass ratio ((P + F)/PEG) on the hydroxyl number of PF-PEGs and mechanical properties, thermal stabilities, crystallization behaviors, as well as microstructure of polyurethane composite films were studied using chemical analysis, mechanical tests, thermogravimetric analyses (TGA), dynamic mechanical analyses (DMA), X-ray diffraction (XRD), scanning and transmission electron microscopies (SEM and TEM), respectively. Results demonstrated that PF-PEGs with (P + F)/PEG of 50/50 had the highest hydroxyl number of 323 mg K(OH)/g. The incorporation of phenol and formaldehyde into PEG improved the mechanical properties of polyurethane films, glass transition temperature ( T g ), and thermal properties but resulted in the brittleness characteristic of the composite films and low crystallization properties. Moreover, the synthesis mechanism of PF-PEGs polyurethane composite films was revealed, which would provide a theoretical base for the preparation of the rigid polyurethane foams based on phenolic resins.
研究领域:
高分子科学
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材料化学
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复合材料
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热分析
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大分子化学
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DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2025
·Vol. 67
·期 2
·15
·
IF 1
Zhijun Li,Huang Zhengyong,Xing Ruiguang
In this study, the preparation of diphenylsilylene diol (DP)-modified double-A epoxy resin (E51) with resveratrol-functionalized graphene (Res/rGO) composites and their performance characterization were investigated. Firstly, the double-A epoxy resin (EP) was modified with DP to improve its mechanical properties and thermal stability. Then, Res/rGO was introduced into the modified epoxy resin (DP/E51), and a series of modified epoxy resin/resveratrol functionalized graphene (Res/rGO-DP/E51) composites were prepared. The effects of different graphene contents on the mechanical properties of the materials were analyzed by conducting tensile property tests on the composites. The results showed that the DP-modified epoxy resin exhibited a significant improvement in tensile strength, especially after the introduction of an appropriate amount of Res/rGO, the tensile properties of the composites were further optimized. Resveratrol, as a natural antioxidant substance, significantly improved the interfacial bonding and dispersion of the composites after functionalization on the graphene surface, thus enhancing the overall performance of the composites. In addition, the Res/rGO-DP/E51 composites exhibited excellent thermal stability, which has a good application prospect.
研究领域:
材料科学
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聚合物复合材料
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纳米材料
·
表面改性
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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 21
·1248
·
IF 3.5
Zhang Liping,Mu Ran,Liu Siying,Li Huitong,Cui Yujing,Yan Zhao,Sun Runchao
Polyethylene glycol-400 (PEG-400), a critical lubricant in photovoltaic silicon wafer slicing, is highly recalcitrant to biodegradation and environmentally persistent. Direct discharge of PEG-400 not only induces water eutrophication and disrupts aquatic ecosystems but also poses chronic health risks to humans through long-term environmental accumulation and water contamination. However, conventional wastewater treatment technologies exhibit limited efficiency in removing PEG-400. In this study, the degradation of PEG-400 was systematically investigated using an O 3 + H 2 O 2 + Mn-Cu/γ-Al 2 O 3 catalytic oxidation process. Single-factor experiments combined with response surface methodology were employed to optimize the catalyst preparation and reaction parameters. Finally, the degradation mechanism and pathway are revealed. The results showed that the Mn-Cu/γ-Al 2 O 3 catalyst prepared under the conditions of 0.1 mol/L impregnation concentration, 500℃ calcination temperature, and 2 h calcination time achieved the optimal catalytic activity. Under the optimal conditions of O 3 concentration of 60 mg/L, H 2 O 2 dosage of 1.8 mmol/L, catalyst dosage of 4 g/L, gas flow rate of 400 mL/min, and reaction time of 90 min, the removal rate of PEG-400 reached 100%, with COD and TOC removal rates of 76.3% and 53.76%, respectively. Radical quenching experiments confirmed that ·OH, ·O 2 − and 1 O 2 were the dominant reactive oxygen species. FTIR and GC–MS analysis revealed that PEG-400 degraded via ether bond cleavage into intermediate products (e.g., aldehydes, carboxylic acids), which verified non-toxicity by T.E.S.T software, and ultimately mineralized into CO 2 and H 2 O.
✓ 已验证
DOI
高影响因子
International Journal of Nanomedicine
·
2023
·
IF 8
Yuming Chen,Jiayi Gu,Jian Liu,Ling Tong,Fuxin Shi,Xiaoqin Wang,Xueling Wang,Dehong Yu,Hao Wu
Background: Cisplatin is an extensively used anti-neoplastic agent for the treatment of various solid tumors. However, a high incidence of severe ototoxicity is accompanied by its use in the clinic. Currently, no drugs or therapeutic strategies have been approved for the treatment of cisplatin-induced ototoxicity by the FDA.Purpose: The purpose of this study was to investigate the otoprotective effects of dexamethasone (DEX)-loaded silk-polyethylene hydrogel (DEX-SILK) following round window membrane administration in the cisplatin-induced ototoxicity mouse model.Methods: The morphology, gelation kinetics, viscosity and secondary structure of the DEX-SILK hydrogel were analyzed. DEX concentration in the perilymph was tested at different time points following hydrogel injection on the RWM niche. Cultured cells (HEI-OC1), organ of Corti explants (C57/BL6, P0-2), and cisplatin-induced hearing loss mice model (C57/BL6) were used as in vitro and in vivo models for investigating the otoprotective effects of DEX-SILK hydrogel against cisplatin.Results: Encapsulation of DEX with a loading of 8% (w/v) did not significantly change the silk gelation time, and DEX was evenly distributed in the Silk-PEG hydrogel as visualized by scanning electron microscopy (SEM). The concentration of Silk majorly influenced DEX distribution, morphological characteristics, viscosity, and gelation time. The optimized DEX-SILK hydrogel (8% w/v loading, 15% silk concentration, 10 μl) was administered directly onto the RWM of the guinea pigs. The DEX concentration in the perilymph was maintained above 1 μg/ml for at least 21 days for the DEX-SILK, while it was maintained for less than 6 h in the control sample of free DEX. DEX-SILK (5-60 ng/ml) exhibited significant protective effects against cisplatin-induced cellular ototoxicity and notably reduced the production of reactive oxygen species (ROS). Eventually, pretreatment with DEX-SILK effectively preserved outer hair cells in the cultured organ of Corti explants and demonstrated significant hearing protection at 4, 8, and 16 kHz in the cisplatin-induced hearing loss mice as compared to the effects noted following pretreatment with DEX.Conclusion: These results demonstrated the clinical value of DEX-SILK for the therapy of cisplatin-induced ototoxicity.
研究领域:
药理学
·
耳鼻喉科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Tiefeng Wang,Jinxiang Dong
The coal (syngas)-to-ethylene glycol (CTEG), is contaminated with the naughty impurity 2-Methoxyethanol (ME) generated during the hydrogenation stage, which affect the quality of EG for fiber-grade polyester production. Distillation, is the employed separation process in industrial, which makes production complicated because of the heat sensitivity of the impurities system. Melt crystallization has been regarded as an effective technology to obtain high-purity organic compounds based on the melting points difference, which could avoid the problems by heating. In this work, we have explored the feasibility of the static melt crystallization on the separation of EG/ME in a jacketed crystallization tube. The experimental parameters were investigated, which covers crystallization and sweating stage in each step. The results showed that the purity of EG could reach ≥99.8% from the binary system studied via the quaternary separation process.
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产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2021
·Vol. 147
·期 12
·6583-6592
·
IF 4.626
Yin Qingqing,Xu Fen,Sun Lixian,Li Yaying,Liao Lumin,Wang Tao,Guan Yanxun,Xia Yongpeng,Zhang Chenchen,Wei Sheng,Zhang Huanzhi,Li Bin
Polyethylene glycol (PEG) is widely used as phase change materials (PCMs). However, the leakage and low thermal conductivity issues restrict its practical application. Herein, a series of novel MWCNTs/HPC/PEG PCMs (named as PCM MHP ) have been synthesized by hydroxypropyl cellulose grafting onto PEG for the first time and doping multi-walled carbon nanotubes (MWCNTs). The results indicate that the PCM MHP exhibit excellent shape stability and without leakage keeping warm for an hour at 353.2 K. The melting and freezing enthalpy of the PCM M1HP7 is 134.7 J g −1 and 131.2 J g −1 , respectively; and corresponding melting point and crystallization temperature are about 324.9 K and 308.8 K, respectively. The PCM MHP show a good reversible thermal stability after 100 heating/cooling cycles. In addition, adding 4 mass% MWCNTs, the PCM M4HP7 possess a higher thermal conductivity of 0.6019 W m −1 K −1 , which is 2.1 times that of the PCM HP without MWCNTs (0.2895 W m −1 K −1 ) and 1.9 times that of pure PEG (0.3228 W m −1 K −1 ). In a word, the fabricated PCM MHP is a kind of shape-stabilized PCM and has good latent ability. It will have a broad potential application in thermal energy storage applications.
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产品关联
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2021
·Vol. 24
·期 5
·749-760
·
IF 1.902
Hongyan Cai,Wenli Luo,Yancheng Zheng,Yi Zhang,Lu Lai,Shanfa Tang
Surface tension of a series of poly(ethylene glycol)-octyl sulfosuccinates at different temperatures was measured, and the interfacial properties were investigated in the absence and presence of inorganic salts. Surface tension results indicate that critical micelle concentration (CMC) values of five surfactants (C8-PEG200, C8-PEG400, C8-PEG600, C8-PEG800, and C8-PEG1000) decrease as the molecular weight of polyethylene glycol (PEG) segments and the experimental temperature increases. The surface activity of the C8-PEG series changes with temperature, and the surface tension at the CMC ( γ CMC ) of the C8-PEG series decreases initially and then increases as the PEG molecular weight increases. This behavior may be attributed to the dehydration of the surfactant molecules, resulting in the change of hydrophile–lipophile balance for the different EO numbers in the surfactant molecules, which form a different surface energy film at the air–water interface. Negative ΔG m indicates that the micellization process of these surfactants is spontaneous and an entropically driven process. For the water/alkane interface, these surfactants have low interfacial activity. The interfacial tension (IFT) between these surfactants and alkanes increases first and then decreases with the increase in the molecular weight of PEG segments. After the addition of salt, the interfacial activity of the investigated surfactants increases significantly. The IFT between C8-PEG800 and 10–12 alkanes and between C8-PEG1000 and 12–16 alkanes reaches a low IFT magnitude of 10 −2 mN m −1 in the presence of 0.5% CaCl 2 or the mixed inorganic salts 0.5% NaCl+0.5% CaCl 2 .
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Pengfei Ge,Qiuquan Cai,Hongjie Zhang,Xuxia Yao,Weipu Zhu
Energy dissipation is a common mechanism to improve the ductility of polymeric hydrogels. However, for poly(ethylene glycol) (PEG) hydrogels, it is not easy to dissipate energy, as polymer chains are dispersed in water without strong interchain interactions or decent entanglement. The brittleness limits the real applications of PEG hydrogels, although they are promising candidates in biomedical fields, as PEG has been approved by the U.S. Food and Drug Administration. Herein, we chemically introduced a center for energy dissipation in the PEG hydrogel system. Amphiphilic segmented PEG derivatives were designed through the melt polycondensation of triethylene glycol (PEG150) and high molecular weight PEG in the presence of succinic acid and mercaptosuccinic acid as dicarboxylic acids. Full PEG hydrogels with elastic nanospheres as giant cross-linkers were facilely prepared by the self-assembly of esterified PEG150 segments and the oxidation of mercapto groups. The resultant full PEG hydrogels can dissipate energy by the deformation of elastic nanospheres with outstanding ductility and self-recoverability while maintaining the excellent biocompatibility owing to their full PEG components. This work provides an original strategy to fabricate full PEG hydrogels with high ductility and self-recoverability, potentially applicable in biomedical fields.
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产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2020
·
IF 4.419
Meng Jia,Aimin Sha,Wei Jiang,Wentong Wang,Jiange Li,Jiasheng Dai,Zhen Lu
Poly(ethylene glycol) (PEG) is a latent heat storage material that has potential to regulate the thermal environment within the asphalt pavement via phase-transition process. However, the properties of PEG vary in terms of its average molecular weight. The PEG selection principle is put forward in this study, which is to not only realize satisfactory cooling function but also minimize the adverse effects on asphalt properties. For illustration, the phase change behaviors and thermal stability of PEG were first studied. It is demonstrated that the PEG samples with its average molecular weight within 2000 ~ 20000 (PEG-2 K ~ 20 K) are characterized by suitable phase change temperatures of 41.27 ~ 62.39 °C, fairly great latent heats of 184.8 ~ 211.9 J·g −1 and excellent thermal stability below 300 °C. The larger molecular weight generally corresponds to the higher phase change temperatures, whereas the greatest latent heats occur at PEG-8 K. Despite that, there are marginal differences among the phase change properties of PEG-4 K ~ 8 K. To further select the ideal PEG, tests for asphalt properties were conducted. Results show that based on the negative role of PEG in the high- and low-temperature properties, temperature and stress sensitivities of asphalt binder, it is necessary to encapsulate PEG before use. Therefore, these detrimental roles are required to be considered when selection of PEG. In terms of our selection principle proposed, PEG with a large average molecular weight is usually preferred except PEG-20 K.
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DOI
高影响因子
危险品化学品经营许可证（带存储）