Frontiers of Materials Science
·
2022
·Vol. 16
·期 2
·1-13
·
IF 2.612
Liu Yuanyuan,Du Xin,Wang Hui,Yuan Yu,Wei Liuhe,Liu Xingjiang,Sun Ailing,Li Yuhan
Self-healing polyurethane (PU) faces aging deterioration due to active dynamic bonds, which remain a challenging predicament for practical use. In this work, a novel strategy is developed to address this predicament by leveraging the hydrophobicity and gas barrier of hydrogenated hydroxyl-terminated polybutadiene (HHPB). The dynamic oxime-carbamate bonds derived from 2, 4-pentanedione dioxime (PDO) enable the elastomer to exhibit surface self-repairability upon applied mild heat and achieve ∼99.5% mechanical self-healing efficiency. The mechanical properties remained nearly intact after 30-d exposure to thermal oxidation, xenon lamp, acids, bases, and salts. Gas permeability, positron annihilation lifetime spectroscopy (PALS), and contact angle measurements reveal the pivotal role of gas barrier, free volume, and hydrophobicity in blocking undesirable molecules and ions which effectively protects the elastomer from deterioration. HHPB-PU also exhibits excellent adhesion to steel substrate. The shear strength achieves (3.02 ± 0.42) MPa after heating at 80 °C for 4 h, and (3.06 ± 0.2) MPa after heating at 130 °C for 0.5 h. Regarding its outstanding anti-corrosive and weatherproof performances, this self-healable elastomer is a promising candidate in surface-protective applications.
研究领域:
材料科学
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化学工程
·
表面保护技术
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DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
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2018
·
IF 0.668
Xiaoyun Ma,Daqin He,Zhengjian Chen
A simple method for the preparation of nitriles in moderate to good yield has been achieved by treatment of aromatic and heterocyclic aldoximes with malononitrile in water at reflux in the presence of copper acetate as catalyst. Arylaldoximes with an electron-donating group showed the highest reactivity, their conversion being achievable at room temperature.
研究领域:
有机化学
·
合成化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Xiaoqing Cui,Bo Yang,Shen Zhao,Xuewei Li,Meng Qiao,Ran Mao,Yan Wang,Xu Zhao
In this paper, a sensitive and selective electrochemical sensor was constructed for nickel (II) detection by employing the electrode material of zeolitic imidazolate framework-8@dimethylglyoxime/β-cyclodextrin/reduced graphene oxide (ZIF-8@DMG/β-CD/RGO). The material was characterized and analyzed by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Nitrogen adsorption-desorption isotherms in detail. In these composite, ZIF-8 served as the supporting material of DMG which was the selective complexing agent to Ni (II), RGO employed conductivity while β-CD prevented the aggregation of RGO sheets. With these features, the sensor showed a wide linear range of 0.01–1.0 μM and a low detection limit of 0.005 μM (S/N = 3). Interferences of diethanol, citric acid , humic acid, Triton X-100 and some common metal ions can be ignored to some extent. Finally, the sensor was applied to Ni (II) detection in real water sample.
研究领域:
分析化学
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环境监测
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纳米材料
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电化学传感
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重金属检测
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Jianwei Bai,Xiaofei Ma,Cen Gong,Yiming Chen,Huijun Yan,Kewei Wang,Jun Wang
Traditional adsorption resin prepared by a low efficiency method has a low porosity and surface area , which limits the adsorption performance of the resin. Therefore, a novel porous resin was developed by structural design of the resins through post- modification with HPA and a post-crosslinked method. The novel porous post-modification resin was successfully prepared by the multistep method. Meanwhile, the high surface area and abundant micropores in HCR-AO can improve the adsorption rate by accelerating the diffusion of uranium in the external diffusion stage. The removal capacity of HCR-AO increased 366% for HCR and 120% for PSD-AO at the same initial concentration. HCR-AO takes less time to reach equilibrium than PSD-AO and HCR. Excitingly, the adsorption amount of the material dropped only slightly even after 8 cycles. The short equilibrium time and outstanding removal efficiency makes it a novel candidate for further extraction of U (VI) from seawater .
研究领域:
环境化学
·
核化学
·
材料科学
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吸附分离
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海洋资源提取
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Sisi Dai,Sasa Ding,Guangming Lu,Guan Yang,Shu Tian,Zhongsen Ma,Yajie Zhang
Antimicrobial polyurethanes have great potential for application in pathogen protection and antifouling coatings. In this study, we developed an intrinsically antimicrobial poly(oxime-urethane) (POU). First, a polyoxime ether polyol (PoEP) was prepared by etherifying biobased 2,5-diformylfuran dioxime (DFFD) and ethylene glycol (EG). POUs (POU-30, POU-40, POU-50, and POU-60) with varying oxime content from the PoEP were synthesized using 4,4-diisocyanate dicyclohexylmethane (HMDI) and polytetrahydrofuran (PTMG-650). Tensile strengths (elongation at break) range from 2.20 MPa (1267%) to 6.64 MPa (72%). The corresponding glass transition temperature (Tg) ranges from 10.95 to 52.00 °C, and the lowest decomposition temperature (Td,5%) is 265 °C. When the oxime ester bond (−CH═N–O–CO−) from the PoEP was incorporated at a concentration of 10.21 wt %, the POU exhibited 100% antibacterial activity against Escherichia coli and Staphylococcus aureus. These results suggest that the PoEP has potential as a renewable polyurethane polyol with excellent antimicrobial properties, making it a promising solution for synthesizing long-lasting and intrinsically antimicrobial polyurethanes.
研究领域:
材料科学
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生物学
·
化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 108
·89309-89318
·
IF 3.84
Yun Wang,Zhengshang Wang,Ran Ang,Jijun Yang,Ning Liu,Jiali Liao,Yuanyou Yang,Jun Tang
A kind of uranium-selective sorbent has been studied using graphene oxide nanoribbons (GONRs) from the unzipping of multiwalled carbon nanotubes as a solid matrix and amidoxime (AO) as a functional group. Amidoxime-functionalized GONRs (AOGONRs) were successfully prepared by chemical grafting technology and characterized by scanning electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, elemental analysis, thermogravimetric analysis and X-ray photoelectron spectroscopy. The as-prepared AOGONRs were applied to adsorb U(VI) from aqueous solutions and exhibited a high sorption capacity towards U(VI) due to the strong chelation of AO to U(VI). It can be noted that the uranium sorption on the AOGONRs was pH-dependent, ionic strength-independent, fast, endothermic, spontaneous and a pseudo-second order process. The U(VI) sorption amount reached up to 2.112 mmol g−1 (502.6 mg g−1) at pH = 4.5 and T = 298 K. The sorption study performed in a simulated nuclear industry effluent demonstrated that the new sorbent had a desirable selectivity towards U(VI) ions over a range of competing metal ions. The results suggest that AOGONRs may be a potential and suitable candidate for the separation of U(VI) from various uranium-containing water samples.
研究领域:
材料科学
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环境科学
·
核化学
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
·
2018
·
IF 3.466
Qi Liu,Wei-Wei Ni,Zhen Li,Cai-Fu Bai,Dan-Dan Tan,Chang-Jun Pu,Dong Zhou,Qing-Peng Tian,Ni Luo,Kai-Li Tan,Le Dai,Yuan Yan,Yong Pei,Xian-Hui Li,Zhu-Ping Xiao,Hai-Liang Zhu
The continuing emergence of drug-resistant Helicobacter pylori (HP) drives the ongoing need for the development of new and effective anti-HP drugs. Urease inhibitor has now gained strong interest as an alternative approach for HP infections . 3-Chlorophenyl-3-hydroxypropionylhydroxamic acid (CPH), a novel urease inhibitor identified in our group, shows impressive potency, which was optically separated for a further exploration. Here, we report in vitro / in vivo pharmacological evaluation of (±)-CPHs and the enantiomers. The raceme and the individual enantiomers significantly suppress gastritis at 32 mg/kg b.i.d dose with lower toxicity to mammalian cells (with CC 50 s ≥ 3.16 mM) and mice (LD 50 s ≥ 2338 mg/kg) than the clinically used agent acetohydroxamic acid . Furthermore, a significant increase of eradication of HP is observed for the combination of (±)-CPHs or the enantiomers with an antimicrobial. These studies revealed that CPH is a promising candidate for an alternative treatment of HP-dependent conditions by targeting virulence factor urease, and CPH may be used as a raceme.
研究领域:
药理学
·
微生物学
·
感染病学
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DOI
PubMed
高影响因子
MOLECULAR DIVERSITY
·
2025
·
IF 3.8
Li Yong,Wu Taotao,Chen Guobin,He Jian,Zhang Yong,Zhang Qin,Zhou Pengfei,Chen Wenzhang,Fan Lingling
Twenty-eight novel phthalide derivatives incorporating thiazole, 1,3,4-oxadiazole, and oxime ether moieties were designed and synthesized using a pharmacophore hybridization strategy. Bioactivity assays demonstrated that compounds 1b , 1c , 4a , 4b and 4c exhibited moderate to excellent inhibitory activity against several specific fungi. Notably, compound 1b displayed superior antifungal efficacy against F. solani , F. oxysporum , B. dothidea , and V. mali compared to the commercial fungicides hymexazol and boscalid , with EC 50 values of 15.0 μ g/mL , 10.0 μ g/mL, 6.1 μ g/mL, and 11.4 μ g/mL, respectively. Additionally, compound 1b provided superior protective efficacy against B. dothidea- infected apples compared to boscalid. Preliminary mechanistic studies revealed that compound 1b could exert its antifungal activity by compromising the integrity of the hyphal cell membrane. This study highlights the potential of phthalide derivatives bearing dihalocarbonyl and oxime moieties as effective antifungal agents for controlling plant pathogenic fungi, warranting further investigation in the future. Graphical
研究领域:
药物化学
·
抗菌剂
·
真菌生物学
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植物病理学
·
药效团杂交
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DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 5
·1052
·
IF 4.2
Weiwei Wang,Zhengyao Li,Weiyao Zhu,Shaochun Hou,Chunlei Guo
The atomic-level structure and electronic properties of monazite were investigated using a first-principles method based on density functional theory (DFT). First, the geometric structure of monazite was optimized, followed by calculations of its Mulliken population, electron density, and density of states, which were subsequently analyzed. The findings of this analysis suggest that monazite is highly susceptible to cleavage along the {100} plane during crushing and grinding. When SPA was utilized as the collector, the recovery rate of monazite was higher than that when LF-P8 was used. The zeta potential and adsorption energy results indicated that the zeta potential after SPA adsorption tended towards negativity, and the adsorption energy was smaller, indicating that SPA exhibited stronger adsorption performance. LF-P8 was stably adsorbed on the monazite (100) surface via mononuclear double coordination. SPA was stably adsorbed on the surface of monazite (100) via binuclear double coordination. The results of this study provide valuable insights into the adsorption of monazite by commonly used flotation collectors. These findings are of substantial importance for future endeavors in designing flotation collectors capable of achieving selective monazite flotation.
研究领域:
矿物加工工程
·
理论化学
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Zhang Yinshan,Wang Yingcai,Dong Zhimin,Wang Youqun,Liu Yuhui,Cao Xiaohong,Zhang Zhibin,Xu Chao,Wang Ning,Liu Yunhai
Efficient extraction of uranium from seawater is expected to provide virtually infinite fuel sources to power nuclear reactors and thus enable sustainable development of nuclear energy. The extraction efficiency for uranium greatly depends on the availability of active adsorption sites on the adsorbents. Maximization of the utilization rate of the binding sites in the adsorbent is vital for improving adsorption capacity. Herein, micro-redox reactors functioned by Cu(I)/Cu(II) conversion are constructed internally in an adsorbent bearing both amidoxime and carboxyl groups to induce active regeneration of the inactivated binding sites to enhance uranium capture. This adsorbent has high adsorption capacity (962.40 mg-U/g-Ads), superior anti-fouling ability as well as excellent uranium uptake (14.62 mg-U/g-Ads) in natural seawater after 56 days, placing it at the top of high-performance sorbent materials for uranium harvest from seawater.
研究领域:
环境科学
·
核工程
·
材料科学
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产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Qing Sun,Diling Yang,Jingsi Chen,Ziqian Zhao,Hao Zhang,Hong Zhong,Hongbo Zeng
Surfactant modification to improve interfacial hydrophobicity is widely employed in separation applications such as mineral recovery. However, few modifications effectively enhance both the inherent hydrophobicity of the surfactant and its surface-anchoring capacity. In this study, we propose a strategy to incorporate a thioether group into a hydroxamate surfactant, resulting in the synthesis of N-hydroxy-2-(octylthio)acetamide (OTHA). Compared to the thioether-free surfactant (OHA), the thioether group significantly improves the metal-anchoring capability of the surfactant, demonstrating a twofold increase in adsorption on hydrophilic cassiterite surfaces. Meanwhile, the inherent hydrophobicity of the thioether group enhances the hydrophobization of the target mineral surface and improves bubble-surface interactions. The robust hydrophobicity-inducing ability of OTHA successfully increases the flotation recovery of hydrophilic cassiterite particles, with a marked improvement from 72.5% to 95.0%. This work presents a paradigm for surfactant modification, enabling tailored hydrophobic interfaces for practical applications such as mineral separation, oil-gas extraction, waterproof materials, and functional coatings.
研究领域:
化学工程
·
矿物加工工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yujie Li,Xiangxiang Chen,Bao Guo,Zilin Dai,Zhenxing Kong,Fangxu Li,Juhua Ou
In this study, the adsorption behavior of gallium ions on a synthesized hydroxamic acid resin from sulfuric acid solution was investigated, aiming to recover Ga directly from pressure leaching solution in zinc hydrometallurgical plant. Hydroxamic acid chelating resin (HA-PDR) was prepared by introducing hydroxamic acid groups into the pre-made polyacrylate resin (PDR) with methyl ester group through hydroxylamine reaction. Polyacrylate-divinylbenzene hydroxamic resins with a nitrogen content of up to 3.85 % were obtained at a divinylbenzene (DVB) content of 13 % and an optimal raw material ratio of NH 2 OH·HCl: NaOH: −CH 3 = 4:4.5:1 (molar ratio). The obtained materials was characterized using FTIR, XPS and SEM to verify the successful introduction of hydroxamic acid groups. The results of adsorption experiments showed that the adsorption capacity of 27.65 mg/g could be obtained with a chemical, multilayered, and heterogeneous adsorption process , and film diffusion and intra-particle diffusion rate controlled mainly the adsorption efficiency. It has been proven that polyacrylate-divinylbenzene hydroxamic resins has extremely high adsorption selectivity for gallium in sulfuric acid solution, and the desorption effect is obvious, which can be applied promisingly in the industrial development of gallium extraction technology from zinc leaching residue in sulfuric acid system.
研究领域:
化学工程
·
材料科学
·
环境工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）