CHINESE JOURNAL OF CHEMISTRY
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2017
·Vol. 35
·期 5
·572-576
·
IF 1.852
Qinming Wu,Xiaolong Liu,Longfeng Zhu,Xiangju Meng,Feng Deng,Fengtao Fan,Zhaochi Feng,Can Li,Stefan Maurer,Mathias Feyen,Ulrich Müller,Feng-Shou Xiao
Development of the sustainable routes for synthesis of ITQ-family zeolites is very important because of their unique structures and excellent catalytic and adsorptive properties. The burden of costly raw materials and low efficiency of synthesis put a strong challenge for their widespread commercial application. Here, we show an alternative and simple route for synthesis of ITQ-12, ITQ-13, and ITQ-17 zeolites using commercially available organic templates by a facile grinding process of anhydrous starting raw solids, followed by heating at 140—180 °C. Compared with the conventional hydrothermal synthesis, this approach has obvious advantages such as employment of low-cost organic templates with very high effectiveness, high yield of zeolite products, short crystallization time, and relatively simple procedures. This methodology might open a pathway to synthesize ITQ zeolites with more sustainable manner.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 47
·23990-23999
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IF 7.443
Zhongzheng Zhang,Baodeng Wang,Chenming Zhu,Peng Gao,Zhiyong Tang,Nannan Sun,Wei Wei,Yuhan Sun
A facile and efficient one-pot melting-assisted solvent-free method was successfully developed for the first time to produce hierarchically mesoporous carbon and nitrogen-enriched mesoporous carbon materials. This method used a very simple thermal treatment process instead of normally reported solvent-based preparations, thus making it potentially very applicable for fast and large scale production of mesoporous carbons. The obtained carbon materials were comprehensively characterized by X-ray diffraction, Raman spectroscopy, N2 sorption, scanning electron microscopy, transmission electron microscopy, CHN analysis, X-ray photoelectron spectroscopy, and elemental mapping. The results show that the as-synthesized carbon materials possess well-developed hierarchical porous structures, uniform pore sizes, and high surface areas, and the specific structures can be adjusted by changing the temperature and duration of the thermal treatment process. Moreover, the resultant carbon material with a high surface area of 748 m2 g−1 exhibits excellent CO2 capture properties with a capacity of 2.73 mmol g−1 at 298 K and 1 bar, and a CO2 selectivity of 21.6 under flue gas conditions. More importantly, due to the successful incorporation of large amounts of highly dispersed N in the carbon matrix (11.67%), the as-synthesized NMC sample exhibits a significantly enhanced CO2 capacity of 1.66 mmol g−1 with an excellent CO2 selectivity of 240.7 at 348 K and 1 bar, revealing great promise for practical CO2 capture applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
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2023
·Vol. 30
·期 7
·1-10
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IF 2.8
Yao Aisong,Li Heng,Luo Haihang,Zhao Jianming,Xiang Jun,Chen Yi,Fan Haojun
Eethylenediamine (EDA), isophorone diamine (IPDA), diethylenetriamine (DETA), N- β- (aminoethyl)- γ- aminopropylmethyl dimethoxysilane (KH602) and polyether amine (D-230) were used as post chain extenders, a series of solvent-free high-solid content water-based polyurethanes (WPU) were prepared. The reactivity of different post chain extenders and the effects of different R values (mole ratio of –NCO/-OH) on solid content as well as the effects of chain extension degree on properties of WPU were investigated in detail. Among of water, small molecule diamine and diol, diamine with higher activity is preferred to water to complete the post chain extension reaction and improves the mechanical properties of WPU. When the R value is higher than 1.7 and the post chain extension degree is controlled at 70%, the viscosity of the solvent-free prepolymer is small enough to be emulsified, and the as-prepared WPUs show more excellent thermodynamic properties. In comparison, the cyclic chain extender such as IPDA can improve the mechanical properties and heat resistance of WPU, crosslinking type chain extenders involving DETA and KH602 can improve the heat resistance and anti-sticking of WPU coating. Whilst the WPU prepared by the chain extender containing flexible space, such as D-230, has a very low modulus and is suitable for preparing soft–type WPU.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Carbohydrate Polymer Technologies and Applications
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2025
·
IF 6.5
Fengxiang Huang,Di Yang,Guohui Bai,Diansan Su,Zhaoqiong Zhu,Yuanzhu Long
Chitosan sponges hold significant promise for advanced wound dressings; however, their widespread adoption is hindered by complex and costly fabrication processes that depend on organic solvents, lyophilization, and alkaline immersion. Here, we introduce a novel organic-solvent-free freeze-thaw strategy to overcome these challenges. The integration of ammonium bicarbonate into acetic acid-dissolved chitosan, followed by a single freeze-thaw cycle (freezing at -20°C and thawing at 26°C within 1 hour), results in the spontaneous formation of pure chitosan sponges. The resulting material exhibits exceptional tensile strength (26.35 kPa at 1.57% solid content) without the use of potentially harmful crosslinkers. This approach eliminates the need for energy-intensive lyophilization and organic solvents, thereby reducing production time and cost by over 90% compared to traditional methods. In vivo studies using SD rat models demonstrate 67% faster epithelialization compared to gauze controls, along with full biocompatibility attributed to the inherent biological properties of pure chitosan. With minimal equipment requirements, environmental sustainability, and high scalability, this method establishes a new benchmark for biomaterial manufacturing. Its potential for clinical translation in emergency wound care and tissue engineering applications is underscored, pending further validation.
研究领域:
材料科学
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生物医学工程
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组织工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
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2023
·Vol. 34
·期 6
·1979-1989
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IF 3.4
Daguang He,Xuefeng Gui,Yonglu Dong,Shudong Lin,Yuanyuan Tu,Jiwen Hu,Shi Li,Jihe Zhao
Synthetic reactions with distinctive physicochemical properties and the study of functional groups during synthesis provide an effective way to design polymers on an individual basis. The functionalization of polymethylhydrosiloxane (PMHS) has been performed via hydrosilylation of PMHS with selected alkenes with different active functional groups. In the reaction of PMHS with selected CC bond-containing olefins in solvent-free systems, the most efficient catalyst system can be selected to obtain the PMHS reagents to introduce the desired functional groups while generating only regional isomeric products. On-line real-time monitoring techniques, in situ Fourier-transform infrared (FT-IR), were utilized to determine the chemical reaction rates and reaction conversions for each chemical reaction, and to assess the merits of the reaction systems. In addition, the structures of the functionalized polymers were characterized using FT-IR spectroscopy, nuclear magnetic resonance (NMR), and gel permeation chromatography (GPC). The kinetic parameters of typical chemical reaction processes were calculated using Kissinger's equation and Ozawa's equation. The comparisons between solvent and solvent-free systems were carried out under the same conditions, and the statistics revealed that the solvent-free system was more efficient than its solvent-based counterpart. This research on the introduction of monofunctional groups into PMHS side chains might pave the way for a variety of diverse functional groups, thus allowing for the further application of PMHS and its derivatives.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Jian Long,Qiang Gao,Haojun Fan,Jun Xiang
Replacing traditional solvent-based polyurethane with two-component solvent-free polyurethane (SFPU) is an efficient approach to achieving green, low-carbon manufacturing of synthetic leather, but the foaming technology of the coating has always been a challenge. In this study, ZnO nanoparticles (nano-ZnO) were in situ loaded onto the surface of 4,4′-oxibis(benzenesulfonyl hydrazide) (OBSH) first, and then the nano-ZnO-loaded OBSH was further modified with KH-550 to improve its dispersion in the SFPU matrix. Finally, zinc stearate (ZnSt2) was doped with nano-ZnO-modified OBSH to activate OBSH, that is, to reduce its decomposition temperature. By means of a synergistic activating strategy, the as-prepared composite foaming agent (CFA) shows a lower decomposition temperature of around 140 °C, and when applied in the manufacture of synthetic leather, a desirable foaming ratio, high peel strength, superior softness and resilience, as well as enhanced water vapor permeability were achieved. More importantly, compared with solvent-based synthetic leather, no VOC emission, zero solvent usage, and more than half reduction in energy consumption were also obtained. This approach offers a promising solution for the green, low-carbon manufacture of synthetic leather.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2012
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IF 3.903
Manhong Liu,Xinxin Mo,Yanyan Liu,Hailian Xiao,Yu Zhang,Jieying Jing,Vicki L. Colvin,William W. Yu
Colloidal platinum nanoparticles with 2.2 nm were immobilized on γ-iron oxide (γ-Fe 2 O 3 ) powder to make a supported catalyst (Pt/γ-Fe 2 O 3 ) with controlled Pt nanoparticle size and size distribution. This catalyst was used to catalyze the selective hydrogenation of o -chlorobenzene to o -chloroaniline without using any solvent; 99.9% selectivity at 99.95% conversion was achieved.
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
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2020
·Vol. 32
·期 3
·1038-1048
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IF 2.578
Zhuding Dai,Pingping Jiang,Pingbo Zhang,Phyu T. Wai,Yanmin Bao,Xuewen Gao,Jialiang Xia,Agus Haryono
In this article, castor-oil–based emulsifier was prepared by the esterification reaction between castor oil and maleic anhydride in the solvent-free and catalyst-free conditions, and the emulsifier was used to fabricate the multiwalled carbon nanotubes/castor-oil–based waterborne polyurethane (WPU) nanocomposite in the absence of solvent. The structure of castor-oil–based emulsifier was characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy, and the thermal properties, mechanical properties, hydrophobicity and morphology of pure WPU and nanocomposite films with different content of multi-walled carbon nanotubes were investigated. The result showed that due to interaction between polymer matrix and multiwalled carbon nanotubes, the tensile strength was improved and thermal stability of polyurethane films was enhanced from 223°C to 248°C with multiwalled carbon nanotubes loading up to 0.5 wt%. In addition, because of lower surface energy and higher roughness of materials, water contact angle of polyurethane films was increased from 69.1° to 86.9°. However, when the content of multiwalled carbon nanotubes of nanocomposite was 0.5 wt%, the elongation at break decreases. The reason was attributed to the fact that the agglomeration of nanoparticles was observed in the scanning electron microscope image with multiwalled carbon nanotubes loading up to 0.5 wt%, which destroyed structure of the polymer.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2020
·
IF 6.146
Mudassar Javed,Shilin Cheng,Guihua Zhang,Cederick Cyril Amoo,Jingyan Wang,Peng Lu,Chengxue Lu,Chuang Xing,Jian Sun,Noritatsu Tsubaki
A series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding route. The catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with their counterpart Co-impregnated zeolite-based catalysts. Successful transformation of solid raw materials to targeted zeolite was confirmed by XRD, SEM, STEM, and N 2 physisorption analysis. An in-depth study of acidic strength and acidic site distribution was conducted by NH 3 -TPD and Py-IR spectroscopy. Acidic strength showed a pivotal role in defining product range. Co@S1, with the weakest acidic strength of silicalite-1 among three types of zeolites, evaded over-cracking of product and exhibited the highest gasoline and isoparaffin selectivity (≈70% and 30.7%, respectively). Moreover, the solvent-free raw material grinding route for zeolite synthesis accompanies several advantages like the elimination of production of wastewater, high product yield within confined crystallization space, and elimination of safety concerns regarding high pressure due to the absence of the solvent. Facileness and easiness of the solvent-free synthesis route together with promising catalytic performance strongly support its application on the industrial scale.
研究领域:
催化化学
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能源材料科学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
IF 5.876
Saisai Ran,Hanfang Liu,Xiaolong Li,Huijie Xie,Wei Xu,Bin Li,Yu Yang,Yongming Chai,Lei Wang
Utilizing silica-rich wastes for synthesis of zeolite can realize a green production protocol and make best use of solid waste. However, industrial solid wastes usually require a complicated pretreatment process and their surface properties are underestimated for the final products. In this study, silica wastes with different acid or basic surface properties are directly used for the solvent-free synthesis of TS-1 zeolites. The states of Ti species, Si/Ti molar ratios, and morphology of final TS-1 zeolites can be controlled by the pristine surface properties and additional ammonium carbonate. TS-1 zeolite synthesized from acid silica waste exhibits lower crystallinity, abundant highly coordinating titanium species, and an elongated c-axis compared to that from basic silica waste. More importantly, TS-1 zeolite ( n S i / n T i = 30 ) synthesized from silica with acid property possesses excellent performance in the epoxidation of chloropropene with 66.2% conversion and 98.5% selectivity to epichlorohydrin, which is attributed to the presence of abundant high-coordination Ti species of mononuclear TiO 6 . Our strategy provides a novel idea for totally green synthesis of zeolite by utilizing solid wastes.
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2023
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IF 7.4
Yuanji Gao,Hongru Feng,Bing Xia,Lei He,Congling Yang,Lijuan Zhao,Yuanjiang Pan
Ultratrace organic pollutants in the environment pose severe threats to human health; hence, their accurate detection is essential. In this study, we develop a secondary solvent-free enrichment strategy based on bubbling extraction (BE). Especially, we used BE solid-phase microextraction and BE carbon nanotube paper absorption to capture aerosols from a liquid water surface, desorb analytes, and analyze the analytes using mass spectrometry. The application of a solvent-free enrichment strategy helps overcome technical challenges in implementing BE technology, including reproducibility, quantification, and sensitivity. This approach objectively demonstrates the enrichment efficiency of BE, resulting in improved mass spectrometry response and quantification. It effectively tackles the difficulties in detecting and quantifying ultratrace environmental pollutants in mass spectrometric analysis. The present study successfully conducted a quantitative analysis of 16 polycyclic aromatic hydrocarbons and 7 antibiotics in 48 environmental water samples. This strategy proved effective in detecting the presence and distribution of polar and nonpolar environmental pollutants in rivers and lakes. Moreover, this strategy has several advantages, such as ultrahigh sensitivity at the femtograms per liter level, good greenness, multiplexed quantitation, low sample consumption, and ease of operation. Overall, the utilization of the ultrasensitive and environmentally friendly BE approach presents a reliable and adaptable method for the identification of ultratrace environmental pollutants in water specimens, thereby enabling early monitoring of pollutant levels.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2022
·
IF 11.072
Kun Zhang,Kuanjun Fang,Yawei Song,Fuyun Sun
Organic solvents adjusting the surface tension and viscosity of reactive dye inks for good droplet formation has resulted in low dye utilization and serious environmental pollution . Hydroxypropyl methyl cellulose (HPMC) has advantages of biocompatibility, renewability and excellent surface tension and viscosity. Here, an organic solvent free dye ink was developed using HPMC and the printability of HPMC/dye inks was compared with diethylene glycol (DEG)/dye inks and commercial inks. Only adding 0.6 wt% of HPMC could obtain good droplet formation, while DEG needed to be added by 50 wt%. The HPMC/dye ink printed patterns exhibited much deeper color than the DEG/dye ink and the commercial ink due to the less diffusion of HPMC/dye ink to the back of the fabric. moreover, as the small dosage of HPMC and the poor reactivity between HPMC and reactive dye, the coloring effluent of the HPMC/dye ink was less than the DEG/dye ink and the commercial ink. According to the data of World Textile Information Network, HPMC adjusting the jetting performance will save 1.4 billion ¥ than DEG in 2025. The HPMC/dye ink is a clean ink with advantages of high performance and low pollution and cost.
研究领域:
材料科学
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纺织工程
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环境科学
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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）