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Chemical Research in Chinese Universities 2025年第1期41卷 59-65页

作者： CHEN Long WANG Yunzheng LV Jiangang yang weimin School of Chemical Engineering East China University of Science and TechnologyShanghai200237P.R.China Sinopec Shanghai Research Institute of Petrochemical Technology Co. Ltd.Shanghai201208P.R.China

This study introduces an innovative method for synthesizing mordenite(MOR)by employing a combination of water glass and fumed silica as the silica *** zeolite produced through this method exhibits a smaller grain size,a larger specific surface area,and a greater number of Brønsted acid sites compared to the conventionally synthesized mordenite using silica ***,the chemical environment of framework Al in MOR zeolites is influenced by different silica sources,leading to varied acid properties between the two MOR zeolites,which results in an enhanced activity of dimethyl ether carbonylation from 50%to over 83%.

关键词： Mordenite Silica source DME carbonylation

Direct Synthesis of UOS Zeolite Using a Simple and Commercially Available Organic Structure-directing Agent

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Chemical Research in Chinese Universities 2025年第1期41卷 113-120页

作者： HU Chao FU Wenhua YUAN Zhiqing LIU Chuang WANG Zhendong yang weimin School of Chemical Engineering East China University of Science and TechnologyShanghai200237P.R.China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Sinopec Shanghai Research Institute of Petrochemical Technology Co.Ltd.SinopecShanghai201208P.R.China

The preparation of zeolite utilizing commercially available organic compounds instead of complex and expensive ones is of practical ***,we report the synthesis of germanosilicate zeolite with UOS framework by utilizing a simple and commercially available compound 3-diethylamino-1-propanol(DEAP)as organic structure-directing agent(OSDA)under fluoride *** synthesis has been optimized by rational modification of the variables,including the Si/Ge molar ratios,the amount of DEAP and F−anions,the concentration of the synthesis gel and crystallization *** zeolite materials were prepared with Si/Ge ratio in the range of 1–*** physicochemical properties,including crystallinity,crystal morphology,chemical environment of framework elements,textural properties and acidity were characterized by multiple *** atoms are proved to preferentially occupy the T sites in the double-four-ring(D4Rs)*** to the isostructural IM-16 zeolite,the UOS zeolites prepared herein are of similar textural properties,such as specific surface area and micropore *** simple structure and commercial availability of DEAP endow this synthesis with a cost advantage over the conventional preparation of UOS zeolite,where an expensive imidazolium derivative is employed.

关键词： UOS zeolite Organic structure-directing agent Hydrothermal synthesis Physicochemical property

2024美国泌尿外科学会/泌尿肿瘤学会膀胱癌诊疗指南更新解读

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临床外科杂志 2025年第1期33卷 59-62页

作者：李凡杨为民华中科技大学同济医学院附属同济医院泌尿外科武汉430030

2023~2024年,美国泌尿外科学会(AUA)/泌尿肿瘤学会(SUO)通过对2020年以来膀胱癌诊疗方向高质量的临床研究和新发表的文献进行审查与数据整合,对非肌层浸润性膀胱癌(NMIBC)和肌层浸润性膀胱癌(MIBC)的诊断和治疗指南进行了更新[1-2]。现... 详细信息

2023~2024年,美国泌尿外科学会(AUA)/泌尿肿瘤学会(SUO)通过对2020年以来膀胱癌诊疗方向高质量的临床研究和新发表的文献进行审查与数据整合,对非肌层浸润性膀胱癌(NMIBC)和肌层浸润性膀胱癌(MIBC)的诊断和治疗指南进行了更新[1-2]。现将指南更新解读如下。

关键词：膀胱癌美国泌尿外科学会美国泌尿肿瘤学会指南解读

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Hierarchical ZSM-5 zeolite with radial mesopores:Preparation,formation mechanism and application for benzene alkylation

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Frontiers of Chemical Science and Engineering 2020年第2期14卷 248-257页

作者： Darui Wang Hongmin Sun Wei Liu Zhenhao Shen weimin yang State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Shanghai Research Institute of Petrochemical TechnologySinopecShanghai 201208China

Hierarchical ZSM-5 zeolite with radial mesopores is controllably synthesized using piperidine in a NaOH *** piperidine molecules enter the zeolite micropores and protect the zeolite framework from extensive *** areas containing fewer aluminum atoms contain fewer piperidine protectant molecules and so they dissolve *** amounts of mesopores are then gradually generated in areas with more aluminum atoms and more piperidine *** this manner,radial mesopores are formed in the ZSM-5 zeolite with a maximal preservation of the micropores and active *** optimal hierarchical ZSM-5 zeolite,prepared with a molar ratio of piperidine to zeolite of 0.03,had a mesopore surface area of 136 m·g and a solid yield of 80%.The incorporation of the radial mesopores results in micropores that are interconnected which shortened the average diffusion path *** to the parent zeolite,the hierarchical ZSM-5 zeolite possesses more accessible acid sites and has a higher catalytic activity and a longer lifetime for the alkylation of benzene.

关键词： hierarchical ZSM-5 zeolite protective desilication piperidine radial mesopores benzene alkylation

CH-S04对熔体微分电纺聚乳酸纤维的增强改性研究

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中国塑料 2025年第02期39卷 1-5页

作者：李万隆杨卫民王朔李长金张杨谭晶阎华李好义北京化工大学机电工程学院中石化(北京)化工研究院有限公司

引入一种有机无机复合成核剂CH-S04用于提高增强聚乳酸（PLA）超细纤维力学性能。研究了不同纺丝温度、纺丝电压条件下PLA/CH-S04纤维膜的非等温结晶行为和CH-S04在多级牵伸工艺中的作用机理，并对PLA/CHS04纤维膜的力学性能进行了测试... 详细信息

引入一种有机无机复合成核剂CH-S04用于提高增强聚乳酸（PLA）超细纤维力学性能。研究了不同纺丝温度、纺丝电压条件下PLA/CH-S04纤维膜的非等温结晶行为和CH-S04在多级牵伸工艺中的作用机理，并对PLA/CHS04纤维膜的力学性能进行了测试与表征。结果表明：当纺丝温度为220℃、纺丝电压为50 kV时，PLA/CH-S04纤维膜的结晶度分别达到最大值26.61%和32.32%，较于纯PLA纤维膜结晶度分别提升18.02%和23.73%；在不同的纺丝接收形式中，施加电压与气流辅助并且用辊子收集，CH-S04对PLA的结晶性能提升效果最佳，结晶度为36.66%，较于纯PLA纤维膜结晶度提升了28.07%；当纺丝温度为240℃，纺丝电压为50 kV时，PLA/CH-S04纤维膜拉伸强度为12.33 MPa，较于纯PLA纤维膜提高11.58%。

关键词：静电纺丝聚乳酸熔体结晶度力学强度

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聚乙烯超细纤维非织造工艺研究进展

中国塑料 2025年第02期39卷 100-105页

作者：张莉彦殷荣政谭晶侯钦正李长金杨涛杨卫民李好义北京化工大学机电工程学院中石化(北京)化工研究院有限公司中国化学纤维工业协会

为深入了解化工产品聚乙烯超细纤维制备现状，从纤维细度出发，对国内外聚乙烯超细纤维非织造工艺进行综述分析。梳理了凝胶纺丝、闪蒸相分离、静电纺丝、熔喷4条路线的成丝机理、细化方法及目前存在的问题，剖析了凝胶纺丝中溶胀、溶... 详细信息

为深入了解化工产品聚乙烯超细纤维制备现状，从纤维细度出发，对国内外聚乙烯超细纤维非织造工艺进行综述分析。梳理了凝胶纺丝、闪蒸相分离、静电纺丝、熔喷4条路线的成丝机理、细化方法及目前存在的问题，剖析了凝胶纺丝中溶胀、溶解行为及高品质凝胶液与超倍拉伸的关联；探讨了闪蒸相分离中的相态变化、超临界CO2“绿色制造”方法；针对聚乙烯非极性、分子量大、黏度高的物性，归纳了使用溶剂、添加导电粒子的溶液电纺以及通过共混小分子极性物质、提高降解温度升温降黏、增设环境温度延长鞭动时间来细化纤维的熔体电纺；分析了工艺参数对共混熔喷后开纤剥离多组分纤维的影响。最后指出使用超临界绿色流体、无卤素环境友好型溶剂等绿色制备方式为未来热点研究方向。

关键词：超细纤维聚乙烯相分离熔喷静电纺丝

基于FDM成型技术的打印强度和成型速率研究进展

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中国塑料 2025年第1期39卷 112-117页

作者：王世檩朱家威张鹏魏兴岳杨华光曾宪奎杨卫民鉴冉冉青岛科技大学机电工程学院山东青岛266061 金发科技股份有限公司企业技术中心广州510663 北京化工大学机电工程学院北京100029

熔融沉积成型(FDM)技术作为3D打印的主流技术,虽受广泛应用,但打印件强度不足与成型速度慢等问题仍是其发展的瓶颈。为此,国内外学者进行了深入研究。本文从优化打印参数、改进层间结合、材料改性和工艺创新等层面,探讨了提升打印强度... 详细信息

熔融沉积成型(FDM)技术作为3D打印的主流技术,虽受广泛应用,但打印件强度不足与成型速度慢等问题仍是其发展的瓶颈。为此,国内外学者进行了深入研究。本文从优化打印参数、改进层间结合、材料改性和工艺创新等层面,探讨了提升打印强度的多种途径。同时,从完善打印方法和优化打印设备两个维度,分析了影响FDM成型效率的关键因素,并提出了相应的改善措施。最后,从打印路径优化及质量检测两个角度总结了国内外学者通过人工智能提高打印强度及打印速率的综合应用。

关键词：熔融沉积成型成型效率成型质量人工智能

Progress of passive daytime radiative cooling technologies towards commercial applications

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Particuology 2022年第8期20卷 57-67页

作者： Yan Cui Xianyu Luo Fenghua Zhang Le Sun Nuo Jjin weimin yang College of Mchanical and Eectrical Engineeing Beijing University of Chemical Techology Bejing 100029 China

Global warming has become one of the major environmental problems facing mankind in the 21st century,The existing refrigeration technology of buildings,like air conditioning,consumes a lot of *** daytime radiative cooling technology works without consuming *** emitting carbon dioxide and other greenhouse *** review summarizes the development of daytime passive radiative cooling technologyfrom the basic principles,structure and materials of radiative coolers;analyses and evaluates the various existing radiative *** core of radiative cooling lies in the combination of multi-scale micro/nano *** cooler reflects sunlight thus preventing the building from being heated up;while allows the building toradiate its own heat out thus being cooled down;meanwhile maintains the temperature difference by the heat insulation effect ofthe porous structure in *** common challenges and potential solutions for the commercialization of radiative cooling technologies are analyzed,which may promote the applications of the technology in the near future.

关键词： Passive daytime radiative cooling Micro/nano particles Porous structure Micro/nano structures

Research on the cuttings discharge in air cushion chamber of slurry shield based on CFD-DEM coupling method Author links open overlay panel

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Particuology 2024年第8期91卷 88-105页

作者： Han Wang Wantao Ding weimin yang Chengzhen Wang Wenduan Yu Zhicheng Wang School of Qilu Transportation Shandong UniversityJinan250002China China Railway 14th Bureau Group Co. LtdJinan250101China

The rapid discharge of cuttings from the air cushion chamber is crucial for the construction safety and excavation efficiency of the slurry *** studies have mainly focused on the transport characteristics of cuttings in the slurry discharge pipe,while the complete process of cuttings entering the slurry discharge pipe from the air cushion chamber until they are discharged was often *** on the CFD-DEM coupling method and combined with actual engineering,this paper established a numerical model that can more completely reflect the cuttings discharge process during slurry shield tunneling,and the effects of the slurry velocity at slurry gate and scouring pipes,inclination angle of slurry discharge pipe,cuttings diameter and shape coefficient were investigated by analyzing the variation in the mass flow rate,mass of discharged cuttings,and discharged *** results revealed that increasing the slurry velocity can promote the discharge of *** keep the discharged rate at a high level,it is recommended that the slurry velocity at the slurry gate should be greater than 0.15 m/*** the inclination angle of the discharge pipe is conducive to the rapid discharge of *** with large diameter or small shape coefficient are more prone to accumulate in the air cushion chamber and cause clogging *** research results not only help to improve engineers'understanding of cuttings discharge in slurry shield,but also provide practical guidance for formulating relevant construction measures.

关键词： Slurry shield CFD-DEM coupling method Cuttings discharge Aircushion chamber Slurry discharge pipe

Stability analysis and optimization of excavation method of double-arch tunnel with an extra-large span based on numerical investigation

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Frontiers of Structural and Civil Engineering 2021年第1期15卷 136-146页

作者： Yiguo XUE Huimin GONG Fanmeng KONG weimin yang Daohong QIU Binghua ZHOU Geotechnical and Structural Engineering Research Center Shandong UniversityJinan 250061China

The Xiamen Haicang double-arch tunnel has a maximum span of 45.73 m and a minimum burial depth of 5.8 m.A larger deformation or collapse of the tunnel is readily encountered during tunnel *** is therefore necessary to select a construction approach that is suitable for double-arch tunnel projects with an extra-large *** this study,three construction methods for double-arch tunnels with extra-large spans were numerically ***,the deformation behavior and stress characteristics of the surrounding rock were obtained and *** results showed that the double-side-drift method with temporary vertical support achieves better adaptability in the construction of such tunnels,which can be observed from both the numerical results and in situ monitoring *** addition,the improved temporary support plays a critical role in controlling the surrounding rock *** addition,the disturbance resulting from the excavation of adjacent drifts was obvious,particularly the disturbance of the surrounding rock caused by the excavation of the middle *** present findings can serve as the initial guidelines for the construction of ultra-shallowly buried double-arch tunnels with extra-large spans.

关键词： double-arch tunnel triple-layer composite liner system numerical modeling stress analysis settlement