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Micro/nano flow chemistry by Beyond Limits Manufacturing

Chinese Chemical Letters 2024年第5期35卷 3-12页

作者： Peiwen Liu Fang Zhao Jing Zhang yunpeng Bai Jinxing Ye Bo Bao Xinggui Zhou Li Zhang Changlu Zhou xinhai yu Peng Zuo Jianye Xia Lian Cen Yangyang Yang Guoyue Shi Lin Xu Weiping Zhu yufang Xu Xuhong Qian State Key Laboratory of Bioreactor Engineering Shanghai Key Laboratory of Chemical BiologySchool of PharmacyEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Center for BiomanufacturingEast China University of Science and TechnologyShanghai 200237China School of Biomedical and Pharmaceutical Sciences Guangdong University of TechnologyGuangzhou 510006China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistrySchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200241China

In September 2018,we proposed the cutting-edge concept of“Beyond Limits Manufacturing”(BLM).BLM technology is based on the three-dimensional inner engraving or precise outer engraving of ultra-fast laser,to invent micro/nano scale flow chips or devices,which makes it possible for the microform,integration,economy,safety,high efficiency,green and intelligence of research,development and manufacturing process,so as to realize transformational manufacturing in the era of Industry *** this paper,we reviewed the representative results we made in the field of micro/nano flow chemistry during the implementation of the BLM major project(December 2019 to August 2023),and discussed its application prospects in micro/nano flow chemistry.

关键词： Beyond Limits Manufacturing Flow chemistry Pharmaceutical manufacturing Microreactor

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沸石分子筛催化芳烃烷基化反应的研究进展

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化工新型材料 2024年第S1期52卷 313-316,321页

作者：丁文鹏方咏霓虞鑫海裴克梅浙江理工大学化学与化工学院杭州310018 东华大学化学与化工学院上海201620

沸石分子筛具有良好的水热稳定性和酸性,其特有的孔道结构有利于分子的传质,在芳烃的烷基化中表现出良好的催化性能。介绍了近年来芳烃烷基化反应中分子筛通过不同的改性方法来改良自身的结构、孔道、酸性位点提升分子筛在芳烃的烷基化... 详细信息

沸石分子筛具有良好的水热稳定性和酸性,其特有的孔道结构有利于分子的传质,在芳烃的烷基化中表现出良好的催化性能。介绍了近年来芳烃烷基化反应中分子筛通过不同的改性方法来改良自身的结构、孔道、酸性位点提升分子筛在芳烃的烷基化反应中催化性能的研究与应用,主要的改性方法有模板法、后处理法、离子交换法等。以期对研究制备高效绿色环保型分子筛固体酸催化剂在芳烃烷基化反应的工业化应用具有一定的意义。

关键词：沸石分子筛固体酸催化剂烷基化反应

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无溶剂有机硅改性环氧电子胶的研究进展

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中国胶粘剂 2024年第9期33卷 22-27页

作者：胡良凯虞鑫海东华大学化学与化工学院上海201620

环氧树脂在电子领域有着广泛的应用,在环氧树脂中引入有机硅的Si—O—Si可改善环氧树脂脆而硬、耐候性差的缺点。本文综述了无溶剂有机硅改性环氧电子胶的改性方法、表征手段,介绍了目前国内外有机硅改性环氧树脂的一些研究进展和在电... 详细信息

环氧树脂在电子领域有着广泛的应用,在环氧树脂中引入有机硅的Si—O—Si可改善环氧树脂脆而硬、耐候性差的缺点。本文综述了无溶剂有机硅改性环氧电子胶的改性方法、表征手段,介绍了目前国内外有机硅改性环氧树脂的一些研究进展和在电子领域(如灌封胶、LED密封胶、导电胶等)的应用,并展望了有机硅改性环氧树脂的未来发展方向。

关键词：环氧树脂电子胶有机硅改性

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Modeling and understanding of the frequency dependent HPM upset susceptibility of the CMOS inverter

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Science China(Information Sciences) 2015年第8期58卷 182-192页

作者： yu xinhai CHAI ChangChun LIU Yang YANG YinTang Key Laboratory of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian University

In this paper, we interpret and, for the first time, model a frequency dependent high-power microwave(HPM) upset susceptibility. We constructed the analytical models of the total amount of injected charges N inj, the excess carrier density distribution in P-Substrate, and the frequency dependent HPM upset susceptibility level. The models are validated by simulated results and experimental data, respectively. Results reveal that N inj is proportional to fαwhile the exponent α should be adjusted to-0.525. The excess carrier density distribution behaves the frequency dependence as well; the dependence is attributable to the fact that the AC field within the CMOS inverter varies too rapidly for the carriers to follow at high frequency. Meanwhile,the HPM upset susceptibility level is a decreasing function of f. The f dependent HPM upset susceptibility model is verified to be reliable and able to quickly estimate the susceptibility level of CMOS inverter considering IC technology, layout parameters, pulse properties, and operating environment simultaneously. Besides, the empirical formula P = A · fαis proposed to provide instant estimation to the HPM upset power threshold. In conclusion, by aid of the analytical model, we acquired the influence of the layout parameter LB on the HPM susceptibility and demonstrated that the CMOS inverter with minor LB is more susceptible to HPM.

关键词： high power microwave frequency upset CMOS analytical model

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烯丙基醚化酚醛亚胺树脂的固化动力学研究

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中国胶粘剂 2024年第4期33卷 29-34,40页

作者：胡良凯虞鑫海李枝芳东华大学化学与化工学院上海201620 山东圣泉新材料股份有限公司特种树脂研究所山东济南250200

采用差示扫描量热仪测定了不同升温速率下烯丙基醚化酚醛亚胺树脂(APMI-F树脂)的DSC曲线,用非等温热力学的研究方法研究了APMI-F树脂的固化反应动力学。用T-β外推法确定了APMI-F树脂的固化反应的起始温度Ti、峰值温度Tp和终止温度Tf,... 详细信息

采用差示扫描量热仪测定了不同升温速率下烯丙基醚化酚醛亚胺树脂(APMI-F树脂)的DSC曲线,用非等温热力学的研究方法研究了APMI-F树脂的固化反应动力学。用T-β外推法确定了APMI-F树脂的固化反应的起始温度Ti、峰值温度Tp和终止温度Tf,并将其作为探究APMI-F树脂固化工艺的依据。通过Kissinger法和Starink法求得APMI-F树脂的表观活化能,由Starink法得到不同固化度下的表观活化能,并将其与试验数据对比,以验证固化动力学模型的准确性。研究结果表明:(1)利用外推法确定了APMI-F树脂固化反应的Ti、Tp和Tf分别为161.09、226.81、263.42℃;(2)Starink法求得的平均活化能要高于Kissinger法所得数据;(3)在固化反应过程中,随着固化程度的升高,APMI-F树脂的表观活化能呈现先降低后升高的趋势,固化初期活化能因黏度的降低而降低,随着交联度的提高,链段运动受到限制导致活化能渐渐升高;(4)采用Málek法成功地建立了APMI-F树脂的固化动力学模型,通过与试验数据对比,发现该模型能够很好地描述APMI-F树脂的固化过程。

关键词：酚醛亚胺树脂烯丙基酚醛固化反应动力学加成固化反应表观活化能

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HFBAPP/6FDA/BPADA含氟苯醚型聚酰亚胺薄膜的制备与性能研究

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绝缘材料 2024年第1期57卷 35-39页

作者：陈晓玲王经逸虞鑫海丁思恩卢鑫黎明职业大学新材料与鞋服工程学院福建泉州362000 东华大学化学与化工学院上海201600 福建省橡塑新材料重点实验室福建泉州362211

以2,2-双[4-(4-氨基苯氧基)苯基]六氟丙烷(HFBAPP)为二胺单体,2,2′-双(3,4-二羧酸)六氟丙烷二酐(6FDA)和双酚A型二醚二酐(BPADA)为二酐单体制备了一系列HFBAPP/6FDA/BPADA含氟苯醚型PI薄膜。通过改变二酐单体比例,分析比较醚键与三氟... 详细信息

以2,2-双[4-(4-氨基苯氧基)苯基]六氟丙烷(HFBAPP)为二胺单体,2,2′-双(3,4-二羧酸)六氟丙烷二酐(6FDA)和双酚A型二醚二酐(BPADA)为二酐单体制备了一系列HFBAPP/6FDA/BPADA含氟苯醚型PI薄膜。通过改变二酐单体比例,分析比较醚键与三氟甲基对PI薄膜综合性能的影响。结果表明:随着三氟甲基含量的升高和醚键含量的降低,HFBAPP/6FDA/BPADA含氟苯醚型PI薄膜的光学性能和热学性能提高,而力学性能下降,玻璃化转变温度最高可达247.3℃,800℃时的残炭率最高可达56.3%,可见光范围内的透光率最高可达88.2%,拉伸强度最高可达84.7 MPa。

关键词：苯醚型聚酰亚胺三氟甲基光学性能热学性能力学性能

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Improved oxidation of hydrogen off-gas by hydrophobic surface modification: A multiscale density functional theory study

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Particuology 2019年第3期17卷 28-35页

作者： Cheng Lian Cheng Cai Xiangjian Shen Shuangliang Zhao xinhai yu Honglai Liu State Key Laboratory of Chemical Engineering and School of Chemical Engineering East China University of Science and Technology Shanghai 200237 China School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 220237 China Research Center of Heterogeneous Catalysis and Engineering Science School of Chemical Engineering and Energy Zhengzhou University Zhengzhou 450001 China Key Laboratory of Safety Science of Pressurized System (MOE) School of Mechanical Engineering East China University of Science and Technology Shanghai 200237 China

A catalytic micro-reactor for converting hydrogen off-gas into water was recently developed, through which the conversion efficiency of hydrogen gas was greatly improved by hydrophobic modification of the catalytic substrate. Herein, a hybrid theoretical method is reported that combines density functional theory (DFT) on both the quantum and molecular scales. This method allows the microscopic study of the mechanism by which the surface catalytic reaction can be manipulated. Specifically, quantum DFT calculations are performed to quantify the molecular interaction between the catalytic substrate and reagent or product. Classical DFT investigations are subsequently carried out to determine the local concentrations of reagents near catalytic sites subject to different surface coating conditions. Finally, the reaction efficiency is determined from the local concentrations based on collision theory. This multiscale method provides molecular insight for quantifying the effect of catalytic surface modification on the reaction efficiency. The method reveals that an optimal surface hydrophobic modification can promote the densities of reagents near the substrate, while depleting the produced water. These two factors promote the conversion efficiency. The exclusion of produced water from the catalytic substrate is affected more by the degree of polymer grafting than by the chain length of hydrophobic polymer moieties.

关键词： Surface reaction Hydrophobic modification Density functional theory Multiscale

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Curing Kinetics and Properties of Epoxy Resin with 1,4-bis(2,4-diaminophenoxy)benzene

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Journal of Wuhan University of Technology(Materials Science) 2018年第5期33卷 1256-1262页

作者： yu xinhai CHEN Shuo XU Yongfen College of Chemistry Chemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China Key Laboratory of High Performance Fibers and Products Ministry of EducationDonghua UniversityShanghai 201620China College of Material Science and Engineering Donghua UniversityShanghai 201620China

A multifunctional amine, 1,4-bis（2,4-diaminophenoxy）benzene（14 BDAPOB）, was prepared and used as a novel hardener for novolac epoxy resin（ER）. The structure of 14 BDAPOB was characterized with Fourier transform infrared（FT-IR） spectroscopy and differential scanning calorimetry（DSC）. The curing kinetics of the novolac epoxy resin/1,4-bis（2,4-diaminophenoxy）benzene（ER/14 BDAPOB） system was studied by means of non-isothermal DSC experiments at five heating rates and determined by the Kissinger, Ozawa and Crane methods. The results showed that the activation energy Ea of the ER/14 BDAPOB（74.56 kJ/mol） system was higher than that of the epoxy resin/LCA-30（ER/LCA-30, 68.85 kJ/mol）, where LCA-30 is a commercial modified diamine. The reaction order, frequency factor and the reaction rate constant at peak temperature of the two systems were calculated. The initial decomposition temperatures（Tonset） were 398.8 ℃（ER/14 BDAPOB）and 334.3 ℃（ER/LCA-30）. The tensile shear strengths were 21.63 MPa（ER/14 BDAPOB） and 21.28 MPa（ER/LCA-30）. The results showed that the two cured systems exhibited good thermal and mechanical properties.

关键词： epoxy resin reaction kinetics hardener thermal properties mechanical properties

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First-principles Theoretical Study on Band of Strained Wurtzite Nb-doped ZnO

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Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 467-472页

作者：乔丽萍 CHAI Changchun YANG Yintang yu xinhai SHI Chunlei Xizang Key Laboratory of Optical Information Processing and Visualization Technology School of Information Engineering Xizang University for Nationalities Key Lab of Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian University

The strain effects of the Zn1-xMgxO substrate on the bands structure of wurtzite Nb-doped Zn O bulk materials have been investigated using fi rst-principles calculations based on density functional theory. Firstly, the band gap increases gradually with increasing Nb contents in unstrained Nb-doped Zn O, which is consistent with the experimental results. Secondly, the band gap decreases with increasing substrate stress in Nb-doped Zn O/Zn1-xMgxO. Splitting energies between HHB（Heavy Hole Band） and LHB（Light Hole Band）, HHB and CSB（Crystal Splitting Band） in Zn0.9167Nb0.0833O/Zn1-xMgxO almost remain unchanged with increasing substrate stress, while decrease slightly in Zn0.875Nb0.125O/Zn1-xMgxO. In addition, detailed analysis of the strain effects on the effective masses of electron and hole in Nb-doped Zn O/Zn1-xMgxO is also given.

关键词： strain band gap Splitting energies effective mass

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新型防弹环氧胶粘剂的研制与性能研究

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中国胶粘剂 2024年第9期33卷 41-47页

作者：李亚东万传松虞鑫海东华大学化学与化工学院上海201620

采用两种环氧树脂、双马来酰亚胺、环氧扩链剂、固化剂、促进剂以及两种增韧剂,研制了系列无溶剂环氧胶粘剂体系,并对其性能进行了综合研究。研究结果表明:(1)4种不同配方的防弹环氧胶粘剂中,JC-4黏度适中,随温度升高而整体下降趋势均... 详细信息

采用两种环氧树脂、双马来酰亚胺、环氧扩链剂、固化剂、促进剂以及两种增韧剂,研制了系列无溶剂环氧胶粘剂体系,并对其性能进行了综合研究。研究结果表明:(1)4种不同配方的防弹环氧胶粘剂中,JC-4黏度适中,随温度升高而整体下降趋势均匀。当温度达到60℃以上时,黏度在400 mPa·s以内,便于对纤维涂敷。4种配方的环氧胶粘剂反应活性均较高,可在室温下进行固化且不会损伤UHMWPE纤维的性能。(2)4种配方的防弹环氧胶粘剂在中低温区均表现出优异的剪切强度,其中JC-3和JC-4配方的胶粘剂较为优异,在120℃仍具有11 MPa以上的剪切强度,表现出良好的耐高温稳定性,能够满足防弹复合材料对树脂基强度和耐热性基本需求。(3)4种配方的相对介电常数在3.9~4.5之间,均具有良好的介电性能,其中JC-4配方所制的环氧胶粘剂介电常数最低,具有良好的电绝缘性。JC-2、JC-3和JC-4的介电损耗在1.8%以内,表现出较优异的介质损耗稳定性。4种配方的环氧胶粘剂吸水率在0.36%~0.65%之间,均具有优异的疏水性能,其中JC-4配方胶粘剂吸水率最低仅为0.362%。(4)将JC-4配方用作防弹复合材料的胶粘剂,防弹复合材料在射击试验中,未被击穿,背弹面受弹头冲击而凸起,背凸高度为23 mm,能够满足防弹复合材料对胶粘剂的性能要求。

关键词：耐高温环氧树脂胶粘剂防弹复合材料胶粘剂性能

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