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Rosin side chain type catalyst-free vitrimers with high cross-link density, mechanical strength, and

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1267-1279 doi: 10.1007/s11705-022-2291-7

Abstract: The emergence of vitrimer, a new class of polymer materials can address the problem of recyclability, reprocess ability and recyclability of thermosetting plastics. Rosin, a natural product, is an ideal raw material for the preparation of polymers in a more sustainable way. Nevertheless, due to the huge steric hindrance caused by the hydrogenated phenanthrene ring structure, the cross-link density of materials is frequently lowered. In this study, hydrogenated rosin was adopted for preparing hydrogenated rosin side-chain type diacids, which were reacted with mixed epoxy to obtain rosin side-chain type vitrimers. It was completely characterized by differential scanning calorimetry test, thermogravimetric analysis, shape memory test and self-healing test. The prepared vitrimers exhibited good self-healing properties, excellent heat resistance (Td = 352 °C) as well as high mechanical properties (tensile strength of 46.75 MPa). The tricyclic diterpene structure of rosin was introduced into the side chain in order to avoid the reduction of cross-link density resulting from the huge steric hindrance of the rigid tricyclic hydrophenylene skeleton. Vitrimers can undergo dynamic transesterification reaction without external catalysts due to the autocatalytic effect of tertiary amines from epoxy. Moreover, our work expanded the application field of rosin, increased the added value of rosin, and provided a novel method for preparing rosin-based vitrimers with ideal properties.

Keywords： vitrimers     rosin     catalyst-free     high mechanical properties     dynamic transesterification reaction    

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Microwave-assisted catalyst-free hydrolysis of fibrous cellulose for deriving sugars and biochemicals

Songshan Jiang, Helen Daly, Huan Xiang, Ying Yan, Huiping Zhang, Christopher Hardacre, Xiaolei Fan

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 718-726 doi: 10.1007/s11705-019-1804-5

Abstract: Microwave (MW) assisted catalyst-free hydrolysis of fibrous cellulose (FC, cellulolysis) at 200°C promoted

Keywords： microwave     fibrous cellulose     hydrolysis     sugars     mechanism    

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Nitrogen-doped graphene approach to enhance the performance of a membraneless enzymatic biofuel cell

Alireza AHMADIAN YAZDI, Jie XU

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 233-238 doi: 10.1007/s11708-018-0529-3

Abstract: Thus, here we first synthesized N-graphene via a catalyst-free single-step thermal process, and made

Keywords： enzymatic fuel cell     nitrogen-doped graphene     reduced graphene oxide     catalyst-free synthesis    

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Direct synthesis of diphenyl carbonate over heterogeneous catalyst: effects of structure of substitutedperovskite carrier on the catalyst activities

WU Guangwen, JIN Fang, WU Yuxin, ZHANG Guangxu, LI Dinghuo, WANG Cunwen, MA Peisheng

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 59-64 doi: 10.1007/s11705-007-0012-x

Abstract: Active component Pd was loaded on various perovskite supports for synthesis of diphenyl carbonate.

Keywords： photoelectron spectroscopy     diphenyl carbonate     proportion     diffraction     perovskite    

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Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of supportand metal nanoparticle size on catalyst activity and products selectivity

Hasan Oliaei Torshizi, Ali Nakhaei Pour, Ali Mohammadi, Yahya Zamani, Seyed Mehdi Kamali Shahri

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 299-309 doi: 10.1007/s11705-020-1925-x

Abstract: The activity of the prepared catalysts is evaluated in the Fischer-Tropsch synthesis (FTS).activity results showed that the cobalt-time yield and turnover frequency passed from a maximum for catalyst

Keywords： cobalt catalyst     cobalt particle size     Fischer-Tropsch synthesis     reduced graphene oxide     supported catalyst    

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Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 772-783 doi: 10.1007/s11705-022-2280-x

Abstract: Development of a titanium silicalite-1 (TS-1) catalyst with good crystallinity and a four-coordinateFurthermore, the TS-1#0.1ACh catalyst demonstrated maximum catalytic activity, good selectivity and highImportantly, the TS-1#0.1ACh catalyst was also highly versatile and effective with different unsaturated

Keywords： size-controlled TS-1     crystal modifier     steam-assisted crystallization     epoxidation    

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Polyethylene glycol-supported ionic liquid as a highly efficient catalyst for the synthesis of propylene

Rui YAO, Hua WANG, Jinyu HAN

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 239-245 doi: 10.1007/s11705-012-1297-y

Abstract: The supported ionic liquid, which has both acidic and basic components, proved to be an active catalystfor PC synthesis under mild conditions.It was demonstrated that the acid group in the catalyst plays an important role in the reaction.In addition, the catalyst was readily recovered and reused.Based on the experimental results, a plausible mechanism for the catalyst was proposed.

Keywords： ionic liquid     PEG-supported ionic liquid     carbon dioxide     propylene carbonate    

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Synthesis of methanol and ethanol over CuZnAl slurry catalyst prepared by complete liquid-phase technology

Wei HUANG, Linmei YU, Wenhui LI, Zhili MA

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 472-475 doi: 10.1007/s11705-010-0525-6

Abstract: method, named the complete liquid-phase technology, has been applied to prepare catalysts for methanol synthesisActivity tests indicate that the CuZnAl slurry catalyst prepared by the new method can efficiently catalyze

Keywords： methanol     slurry     ethanol     complete liquid-phase technology     CuZnAl catalyst    

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Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts

Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao

Engineering 2017, Volume 3, Issue 4,   Pages 567-574 doi: 10.1016/J.ENG.2017.03.029

Abstract: briefly summarizes the role of organic templates and describes designed routes for the organotemplate-freesynthesis of zeolites, aided by zeolite seeds and zeolite seeds solution.synthesis of zeolite products, where Na+ exists as an alkali cation.This feature is very important in directing the synthesis of zeolite catalysts with controllable Si/Alratios under organotemplate-free conditions, and is thus important for the efficient design of zeolites

Keywords： Zeolite seed-directed synthesis     Organotemplate-free synthesis     Zeolite seeds solution     Si/Al ratios     Zeolite    

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Light olefins synthesis from С

Anton SHALYGIN, Evgenii PAUKSHTIS, Evgenii KOVALYOV, Bair BAL’ZHINIMAEV

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 3,   Pages 279-288 doi: 10.1007/s11705-013-1338-1

Abstract: A novel K RuOCl /TiO catalyst was tested for the oxidative chlorination of methane and ethane.The catalyst had high selectivity for methyl and ethyl chlorides, 80% and 90%, respectively.The reaction mechanism for the oxidative chlorination of methane and ethane over the Ru-oxychloride catalystThe novel fiber glass catalyst was also tested for the dehydrochlorination of alkyl chlorides to ethylene

Keywords： oxychlorination     methane     ethane     light olefins     ruthenium catalyst    

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Recent advances on metal-free graphene-based catalysts for the production of industrial chemicals

Zhiyong Wang, Yuan Pu, Dan Wang, Jie-Xin Wang, Jian-Feng Chen

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 855-866 doi: 10.1007/s11705-018-1722-y

Abstract: With the development of carbon catalysts, graphene-based metal-free catalysts have drawn increasing attentionIn recent years, the catalytic activities of metal-free catalysts have significantly improved and theyThe use of metal-free catalysts greatly improves the sustainability of chemical processes.In view of this, the recent progress in the preparation of graphene-based metal-free catalysts along

Keywords： graphene-based materials     metal-free catalyst     industrial chemical productions     catalytic reaction    

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A facile synthesis of high activity cube-like Pt/carbon composites for fuel cell application

Reza B. MOGHADDAM, Samaneh SHAHGALDI, Xianguo LI

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 245-253 doi: 10.1007/s11708-017-0492-4

Abstract: High activity catalyst with simple low-cost synthesis is essential for fuel cell commercialization.In this study, a facile procedure for the synthesis of cube-like Pt nanoparticle (Pt ) composites withsupports is developed by mixing precursor of Pt with carbon supports in organic batches, hence, one pot synthesis

Keywords： synthesis     cube-like Pt     Pt/C composite     catalyst     impedance    

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A new method for the synthesis of molybdovanadophosphoric heteropoly acids and their catalytic activities

ZHANG Fumin, GUO Maiping, GE Hanqing, WANG Jun

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 296-299 doi: 10.1007/s11705-007-0054-0

Abstract: An environmentally benign method for the synthesis of heteropoly acids HPMoVO·HO (PMoV, = 1−3) was developedThe as-synthesized samples were found to be an efficient catalyst for the hydroxylation of benzene which

Keywords： conversion     heteropoly     Characterization     efficient catalyst     Keggin-type phosphomolybdic    

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Review of SO42-/MxOy solid superacid catalysts

Yanni WU, Shijun LIAO

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3,   Pages 330-343 doi: 10.1007/s11705-009-0208-3

Abstract: solid superacid catalysts, play a vital role in more and more fields such as organic synthesis, fineThis review highlights the recent development of solid superacid catalysts based on , including synthesis

Keywords： solid superacid catalyst     synthesis method     characterization     applications    

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Template-free synthesis of hierarchically macro-mesoporous Mn-TiO

Zhao Peng, Li-Hua Chen, Ming-Hui Sun, Pan Wu, Chang Cai, Zhao Deng, Yu Li, Wei-Hong Zheng, Bao-Lian Su

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 43-49 doi: 10.1007/s11705-017-1679-2

Abstract: This study described a template-free method for the synthesis of hierarchically macro-mesoporous Mn-TiOMeanwhile, the Mn-TiO catalyst with the hierarchically macro-mesoporous architecture has a better catalytic

Keywords： titania     hierarchically macro-mesoporous structure     Mn-doping     selective catalytic reduction    

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Title Author Date Type Operation

Rosin side chain type catalyst-free vitrimers with high cross-link density, mechanical strength, and

Journal Article

Microwave-assisted catalyst-free hydrolysis of fibrous cellulose for deriving sugars and biochemicals

Songshan Jiang, Helen Daly, Huan Xiang, Ying Yan, Huiping Zhang, Christopher Hardacre, Xiaolei Fan

Journal Article

Nitrogen-doped graphene approach to enhance the performance of a membraneless enzymatic biofuel cell

Alireza AHMADIAN YAZDI, Jie XU

Journal Article

Direct synthesis of diphenyl carbonate over heterogeneous catalyst: effects of structure of substitutedperovskite carrier on the catalyst activities

WU Guangwen, JIN Fang, WU Yuxin, ZHANG Guangxu, LI Dinghuo, WANG Cunwen, MA Peisheng

Journal Article

Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of supportand metal nanoparticle size on catalyst activity and products selectivity

Hasan Oliaei Torshizi, Ali Nakhaei Pour, Ali Mohammadi, Yahya Zamani, Seyed Mehdi Kamali Shahri

Journal Article

Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

Journal Article

Polyethylene glycol-supported ionic liquid as a highly efficient catalyst for the synthesis of propylene

Rui YAO, Hua WANG, Jinyu HAN

Journal Article

Synthesis of methanol and ethanol over CuZnAl slurry catalyst prepared by complete liquid-phase technology

Wei HUANG, Linmei YU, Wenhui LI, Zhili MA

Journal Article

Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts

Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao

Journal Article

Light olefins synthesis from С

Anton SHALYGIN, Evgenii PAUKSHTIS, Evgenii KOVALYOV, Bair BAL’ZHINIMAEV

Journal Article

Recent advances on metal-free graphene-based catalysts for the production of industrial chemicals

Zhiyong Wang, Yuan Pu, Dan Wang, Jie-Xin Wang, Jian-Feng Chen

Journal Article

A facile synthesis of high activity cube-like Pt/carbon composites for fuel cell application

Reza B. MOGHADDAM, Samaneh SHAHGALDI, Xianguo LI

Journal Article

A new method for the synthesis of molybdovanadophosphoric heteropoly acids and their catalytic activities

ZHANG Fumin, GUO Maiping, GE Hanqing, WANG Jun

Journal Article

Review of SO42-/MxOy solid superacid catalysts

Yanni WU, Shijun LIAO

Journal Article

Template-free synthesis of hierarchically macro-mesoporous Mn-TiO

Zhao Peng, Li-Hua Chen, Ming-Hui Sun, Pan Wu, Chang Cai, Zhao Deng, Yu Li, Wei-Hong Zheng, Bao-Lian Su

Journal Article