TEXTILE RESEARCH JOURNAL
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2023
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IF 2.3
Mingyuan Liu,Zikai Wu,Yuchen Meng,Zongwen Wang,Xinyang He,Jiatai Gu,Yue Zhang,Liming Wang,Xiaohong Qin
In order to solve the difficulty of starch being insoluble under medium and low temperature, a cationic starch slurry modified with etherification was developed. Raw starch was hydrolyzed by sodium hydroxide to improve the dispersion performance, and then the hydrolyzed starch was endowed with cationic groups by N-2,3-epoxy-propyl trimethyl ammonium chloride to improve the dispersion stability. Through various characterization methods, it was found that the quaternary ammonium cationic starch obtained was dissolved in water at medium and low temperature, and the starch structure was changed under the influence of sodium hydroxide and N-2,3-epoxy-propyl trimethyl ammonium chloride. Furthermore, the mechanical properties and abrasion resistance of cotton yarn treated with cationic starch could be significantly improved. Compared with the original yarn, the breaking strength of the yarn treated with cationic starch was increased by 70.05%, the hairiness index of the yarn was reduced by 87.5%, the abrasion resistance was increased by 500.00%, and the stiffness decreased by 276.47%. In addition, the Zeta potential of modified starch was positive, and the degree of etherification substitution of starch ranged from 0.02 to 0.26. The preparation method of etherified starch obtained has the advantages of environmental protection, low cost, and a simple process, which provides a novel way to construct textile size.
研究领域:
纺织科学
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化学工程
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材料科学
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2022
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IF 4.198
Tianhao Xu,Xingyu Zhou,Xiong Xiao,Yan Yuan,Long Liu,Tianzeng Huang,Chunya Li,Zhi Tang,Tieqiao Chen
A nickel-catalyzed decarbonylative thioetherification of carboxylic acids with thiols was developed. Under the reaction conditions, benzoic acids, cinnamic acids, and benzyl carboxylic acids coupled with various thiols including both aromatic and aliphatic ones produce the corresponding thioethers in up to 99% yields. Moreover, this reaction was applicable to the modification of bioactive molecules such as 3-methylflavone-8-carboxylic acid, probenecid, and flufenamic acid, and the synthesis of acaricide chlorbenside. These results well demonstrated the potential synthetic value of this new reaction in organic synthesis.
研究领域:
有机化学
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合成化学
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DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 8
·2293-2301
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IF 3.186
Liu Xueping,Shi Shengbin,Yang Su,Gu Liuyu,Gao Lijing,Zhang Jin,Xiao Guomin
Using etherification to convert glycerol into biofuel additives is an effective way to solve the current problem of excess glycerol. In this study, a series of environmentally friendly (x)HPW/ZrO 2 catalysts were synthesized for the etherification of glycerol and tert-butyl alcohol (TBA). The internal microstructure and acidity analysis of the synthesized samples were derived from BET, XRD, Raman spectroscopy, FTIR, SEM, NH 3 -TPD and Py-FTIR. The results revealed that the synthesized catalysts retained the complete Keggin structure of phosphotungstic acid (HPW) which supported on it. The (15)HPW/ZrO 2 catalyst with suitable structure and acidity had an excellent catalytic effect on the etherification reaction. Driven by the (15)HPW/ZrO 2 catalyst, the optimal reaction conditions were determined from parameters of reaction temperature, time, molar rate of glycerol and TBA, and catalyst dosage. 93.2% glycerol conversion and 42.5% selectivity of multi-substituted tert-butyl glycerol ethers (DTBG + TTBG) were obtained under optimal conditions. In addition, even after a total of four consecutive reactions, (15)HPW/ZrO 2 catalyst still demonstrated relatively good catalytic activity. Graphic Abstract
研究领域:
催化化学
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可再生能源
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环境科学
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产品关联
DOI
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
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2018
·Vol. 71
·期 6
·449-454
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IF 1.059
Fu-Rong Zeng,Qi-Lin Zhu,Zi-Long Li
Post-polymerization modification is a facile and efficient method for the generation of diverse functional polymers. Herein, polymer-based molecular arrays were obtained by using sequential modification. First, periodic polyketone P0 was synthesized via acyclic diene metathesis (ADMET) polymerization of α,ω-diene M0. Oxime chemistry was employed in the functionalization of the ketone moieties of P0 using three commercially available alkoxyamine hydrochlorides. Finally, electrophilic alkoxyetherification, a four-component reaction, was employed in the modification of alkene groups on polymer main chains using N-bromosuccinimide (NBS), tetrahydrofuran, and fluorinated carboxylic acid. Complete conversion of reactive sites was observed in both steps, and the two modification reactions exhibited excellent compatibility. The thermal properties of the polymers as thermal stability, and glass transition and melting behaviours were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC).
研究领域:
材料科学
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有机化学
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DOI
高影响因子
GREEN CHEMISTRY
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2019
·Vol. 21
·期 21
·5828-5840
·
IF 9.405
Xinli Tong,Pengfei Guo,Shengyun Liao,Song Xue,Haigang Zhang
The selective transformation of the aldehyde group (–CHO) in multifunctional oxygenates is a key challenge in the development of sustainable biomass feedstock. Herein, a smart Ni-MFC catalyst was developed from a 2D Ni-based metal–organic framework (MOF), which efficiently promoted the transformation of –CHO in the presence of H2 to a methyl group (–CH3) via the reductive etherification and hydrogenolysis of the C–O ether bond in methanol. Moreover, the catalytic process could be controlled to directionally produce methyl ether (–CH2OR) using the reductive etherification protocol. For the catalytic reduction of vanillin, the Ni-MFC-700 catalyst guaranteed the full conversion of vanillin and 96.5% yield of the desired 2-methoxy-4-methylphenol (MMP), while the Ni-MFC-500 catalyst afforded about 82.7% yield of 4-(methoxymethyl)-2-methoxyphenol in methanol solvent. This is a novel and promising approach for the valorization of multifunctional oxygenates and biomass-derived platform compounds.
研究领域:
化学催化
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生物质转化
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有机合成
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产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
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2021
·
IF 7.033
Shiliang Wu,Jiajing Bao,Ziwei Wang,Huiyan Zhang,Rui Xiao
Catalytic etherification is a new and developing method for the upgradation of pyrolysis bio-oil into high performance bio-based long-chain ethers. In this work, the application of bio-based long-chain ether oxygenated additives in diesel engines have been checked by focusing on their regulated emissions and PAH emissions. Four bio-based long-chain ethers with similar structures, including: Polyoxymethylene dimethyl ether , diglyme , dipropylene glycol dimethyl ether and tripropylene glycol methyl ether have been blended with diesel fuel and tested in a small-duty diesel engine. The results showed that long-chain ethers were beneficial to the reduction of regulated emissions by comparing to pure diesel. Polyoxymethylene dimethyl ether and tripropylene glycol methyl ether showed best performance among the four tested ethers. Polyoxymethylene dimethyl ether could reduce 56% CO, 23% NO and 93% soot emissions, while Tripropylene glycol methyl ether could reduce 52% CO, 28% NO and 88% soot emissions. Besides, the particle sizes of soot particles from the blended fuels were also reduced. What's more, the addition of bio-based long-chain ethers could reduce particulate PAHs emissions by 39% ~ 67% and reduce gaseous PAHs emissions by 25% ~ 44%, and the PAHs toxicity was also reduced by 32% ~ 55%. This work proved that the structure of oxygen atoms evenly distributed in the chain could efficiently suppress the production of soot precursors and eventually reduce the soot emission
研究领域:
能源与环境科学
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化学工程
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产品关联
DOI
高影响因子
Catalysts
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2018
·Vol. 8
·期 9
·383
·
IF 3.465
Wenting Fang,Hualei Hu,Zhongsen Ma,Lei Wang,Yajie Zhang
The revealing mechanism of side reactions is crucial for obtaining theoretical yield in industrialization when 2,5-bis(methoxymethyl)furan (BMMF) yield is above 95%. By-products catalyzed by the conventional ZSM-5 (C-ZSM-5) and hierarchical porous ZSM-5 (HP-ZSM-5) catalytic systems were different, and some key by-products were identified. Thus, possible pathways were proposed, which helps to further improve BMMF selectivity. Additionally, HP-ZSM-5 exhibited quicker reaction rate, higher BMMF yield and selectivity, and slower deactivation process. The relatively weak acidity of HP-ZSM-5 suppresses the ring-opening reaction and subsequent side reactions, and introduction of mesopores improves mass transport and slightly increases hydration of 2,5-bis(hydroxymethyl)furan (BHMF).Keywords:etherification;furanic diether;heterogeneous catalysis;side reaction;ZSM-5
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
Catalysts
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2023
·Vol. 13
·期 6
·969
·
IF 3.9
Srinivasan Vinju Vasudevan,Jin Cai,Junming Xu,Hongjian Lin,Hongliang Wang,Quan Bu
In this work, the microwave-assisted reaction of 5-hydroxymethylfurfural (5-HMF) into valuable ether and acylated production formation was investigated with the help of molybdophosphoric acid encapsulated dendritic fibrous silica (KCC-1) as a catalyst. XRD, N2adsorption-desorption, SEM, FT-IR, NH3-TPD, and TEM were used to analyze the physicochemical and structural properties of the synthesized catalysts. The microwave etherification of 5-HMF with ethanol was tested using synthesized catalysts. The effects of the reaction temperature, reaction time, catalytic amount, and microwave power were investigated. The resulting MPA-KCC-1 and IMPA-KCC-1 catalysts demonstrated excellent activity for the etherification of 5-HMF with ethanol, producing 5-(hydroxymethyl) furfural diethyl acetal (HMFDEA) and 5-(ethoxymethyl)furfural diethyl acetal (EMFDEA) products selectively. The significant advantages of the work are the selective production of EMFDEA at 82%, the catalyst can be easily removed via filtration, and the catalyst activity remains nearly intact even after five reaction cycles.Keywords:biomass;acetylation;5-HMF;etherification;heteropolyacid;fibrous silica
研究领域:
化学工程
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催化材料
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产品关联
DOI
高影响因子
Vietnam Journal of Chemistry
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2023
·Vol. 61
·期 2
·204-209
·
IF 0.9
Nguyen Van Vinh Ha,Nguyen Thi Thu Ha,Ong Ngoc Khanh,Dinh Truc Phuong,Ho Thanh Nhat,Nguyen Thanh Tung
Herein we reported a method for copper pivalate mediated, directed functionalization of ortho C−H bonds in (2-methylthio)aniline benzamides. Diaryl disulfides were used for thiolation, while successful phenoxylation was obtained with phenol as the coupling agent. Our report marks a rare example for flexible transformation of benzamide C(sp 2 )−H bonds into the corresponding unsymmetrical diaryl ethers and thioethers.
研究领域:
有机化学
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合成化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
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2018
·
IF 2.065
Wei Li,Zhenzhen Xu,Zongqian Wang,Xinhua Liu,Changlong Li,Fangtao Ruan
In order to investigate the impact of double etherification on the adhesion to fibers and desizability of corn starch , a series of doubly etherified corn starch (DES) with the total degree of substitution (DS) values of 0.014–0.034 were prepared by simultaneous quaternization and sulfonation of acid-converted corn starch (ACS) with N -(3-chloro-2-hydroxypropyl) trimethylammonium chloride (CHPTMA) and 3-chloro-2-hydroxy-1-propanesulfonic acid sodium salt (CHPS-Na). The influence of double etherification on the adhesion of starch to cotton and polyester fibers was evaluated. It was found that etherification was able to increase the tensile strengths of starch to the fibers, and the strengths gradually increased as the etherification levels rose. Moreover, etherification was capable of displaying a positive effect on the desizability of starch as determined by measurements of swelling capacity of DES films and the time required to break the films. Etherification also enhanced the paste stability and moisture regain of the films. The DES with a total DS value of 0.034 showed potential for ameliorating the adhesion of starch to cotton and polyester fibers for warp sizing.
研究领域:
材料科学
·
纺织工程
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2023
·
IF 8.7
Mengxue Song,Chonghao Qiu,Pengfei Ma,Jiawei Zhong,Zhuohan Zhang,Weiping Fang,Wenjing Song,Jianqiang Fan,Weikun Lai
Reductive etherification is an attractive and practical strategy to convert bio-platform compounds into valuable chemicals. In directed synthesis of furfuryl ethers, reductive etherification of bioderived furfurals is still challenging due to the complexity of catalytic reaction . Herein, reductive etherification of furfural with alcohol was investigated over Ni/ZSM-5 catalyst, which found that Si/Al ratios in ZSM-5 played an important role on the catalytic performance. For Ni/ZSM-5 with Si/Al ratio of 50, 80.9% yield of furfuryl ether at 90.8% conversion of furfural was achieved under the condition of 2 MPa H 2 and 180 °C for 3 h in isopropanol. The catalyst exhibited superior stability and recyclability during the consecutive cycle run. Catalysts characterization demonstrated that both acidic properties and furfural adsorption were influenced by the Si/Al ratios in Ni/ZSM-5, which correlated to the reaction route and catalytic performance. Lewis acid sites enhanced furfural hydrogenation into furfuryl alcohol, while Brønsted acid sites on ZSM-5 effectively catalyzed sequential etherification of furfuryl alcohol to furfuryl ether. Under optimization conditions, various furfuryl ethers could be obtained with yields above 80% over Ni/ZSM-5 catalyst in different primary alcohols, demonstrating the general versatility of the approach. Our findings offered opportunities to develop an efficient furfuryl ethers synthesis method .
研究领域:
催化化学
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能源化学
·
绿色化学
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 19
·期 3
·722-728
·
IF 8.506
Miaomiao Han,Xiao Liu,Xiaosa Zhang,Yuanyuan Pang,Peng Xu,Jianwei Guo,Yadong Liu,Shuangyan Zhang,Shengxiang Ji
5-Hydroxymethylfurfural (HMF) is an important platform chemical derived from biomass. Tremendous efforts have been made to transform HMF into valuable chemicals for applications in biofuels, materials science, and pharmaceuticals. Here we report the conversion of HMF into 5-hydroxymethyl-2-vinylfuran (HMVF), a versatile adhesive. HMVF can bond to a variety of substrates, e.g. metal, glass, plastics and rubber, under heating or acid treatment at room temperature. Mechanistic studies show that the vinyl group undergoes free radical polymerization and the hydroxyl group dehydrates to form an ether linkage to crosslink HMVF under either heating or acid treatment. The bonding strength (τ) of HMVF cured by heating (h-HMVF) is close to that of Krazy Glue (Loctite 401, cyanoacrylate) and higher than that of white glue (Pattex No. 710, PVA) and Pattex PKME15C epoxy glue. The outstanding adhesive performance of HMVF is attributed both to the interaction of hydroxyl groups with substrates and crosslinking by etherification between hydroxyl groups. Similar to Krazy Glue, HMVF is also used in its monomer form, which eliminates the use of solvents. Cells show good adhesion on crosslinked HMVF, which makes HMVF a potential bio-adhesive.
研究领域:
化学工程
·
材料科学
·
生物技术
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DOI
高影响因子
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