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Exceptionally flame-retardant flexible polyurethane foam composites:synergistic effect of the silicone resin/graphene oxide coating

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 969-983页

作者： Qian Wu Jincheng Zhang Shengpeng Wang Bajin Chen Yijun Feng yongbing pei Yue Yan Longcheng Tang Huayu Qiu Lianbin Wu Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education Hangzhou Normal UniversityHangzhou 311121China Collaborative Innovation Center of Zhejiang Province for Manufacturing of Fluorine Silicon Fine Chemicals and Materials Hangzhou Normal UniversityHangzhou 311121China Transfar Zhilian Co. Ltd.Hangzhou 311215China

A facile strategy was developed to fabricate flexible polyurethane(PU)foam composites with exceptional flame *** approach involves the incorporation of graphene oxide(GO)into a silicone resin(SiR)solution,which is then deposited onto a PU foam surface via the dip-coating technique and ***-transform infrared spectroscopy,scanning electron microscopy,and Raman spectroscopy measurements demonstrated that the SiR and GO were successfully coated onto the PU skeleton and the intrinsic porous structure of the PU foam remained *** effects of SiR and GO on the mechanical and thermal stability and flame retardancy of PU composites were evaluated through compression tests,thermogravimetric analysis,vertical combustion tests,and the limiting oxygen *** measurement results revealed that the composites(PU@SiR-GO)showed superior flame retardancy and thermal and mechanical stability compared to pristine PU or PU coated with SiR *** mechanical and thermal stability and the flame-retardant properties of the PU composites were enhanced significantly with increasing GO *** on the composition,microstructure,and surface morphology of PU@SiR-GO composites before and after combustion tests,a possible flame-retardance mechanism is *** work provides a simple and effective strategy for fabricating flame retardant composites with improved mechanical performance.

关键词： flame retardancy flexible polyurethane foam graphene oxide silicone resin

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Facile generation of highly durable thiol-functionalized polyhedral oligomeric silsesquioxane based superhydrophobic melamine foam

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Frontiers of Chemical Science and Engineering 2022年第8期16卷 1247-1258页

作者： Meng Li Yuanfeng Fang Chun Liu Mengmeng Zhou Xiaomei Miao yongbing pei Yue Yan Wenjun Xiao Huayu Qiu Lianbin Wu Key Laboratory of Organosilicon Chemistry and Materials Technology Ministry of EducationHangzhou Normal UniversityHangzhou 311121China

In this study,a durable superhydrophobic/superoleophilic melamine foam was fabricated by a facile and rapid one-step thiol-ene click chemistry and Michael addition reaction,which demonstrated excellent robustness in oil/water ***,1H,1H,2H-perfluoro-1-hexene reacted with thiol-functionalized polyhedral oligomeric silsesquioxane via the thiol-ene click chemistry to obtain a fluorinated thiol-functionalized polyhedral oligomeric silsesquioxane ***,the melamine foam was immersed to the solution system to form nanoaggregates on the melamine foam surface by the Michael addition reaction in the presence of ultraviolet *** micro/nano rough structure and low surface energy of the nanoaggregates layer endowed the pristine melamine foam with superhydrophobicity;the water contact angle was greater than 150°.More importantly,the as-prepared melamine foam could withstand harsh conditions,such as a corrosive solution environment,strong ultraviolet light,mechanical compression,high and low temperature exposure,and ultrasonic *** by gravity,the as-prepared melamine foam could efficiently separate the oil/water mixtures and maintain 98%separation efficiency at high and low *** addition,it maintained the desirable absorption capability in different oil/organic solvents even after 15 absorption ***,this facile,low-cost,and robust onestep method provides important support for the superhydrophobic oil/water separation field.

关键词： superhydrophobic melamine foam thiol-func tionalized polyhedral oligomeric silsesquioxane durable,oil/water separation

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A Computer Simulation Study on Deposition Patterns of Cyclic Diblock Copolymer Solution Nanodroplets:Influence of Polymer Length and Concentration

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Chemical Research in Chinese Universities 2025年第1期41卷 21-32页

作者： pei Hanwen ZHANG Jun SUN Zhaoyan State Key Laboratory of Polymer Physics and Chemistry&Key Laboratory of Polymer Science and Technology Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P.R.China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026P.R.China

Molecular dynamics simulations are conducted to investigate the deposition patterns of cyclic diblock copolymer solution nanodroplets on solid surfaces(walls).The primary focus is how initial polymer concentration,chain length,and solvent-wall interaction affect these *** patterns are categorized into phase diagrams,mainly composed of multihollow,coffee-ring,and multilayer *** also study the deposition of polymer blocks with different adsorption behavior by adjusting the interaction strength between the polymer block and the wall[ε_(A(B)W)],including weakly adsorbable(ε_(A(B)W)=0.6),moderately adsorbable(ε_(A(B)W)=1.0),and strongly adsorbable(εA(B)W=1.2)polymer *** study identifies the key factors influencing the droplet’s deposition structure and elucidates the mechanisms behind pattern *** findings contribute to the design of deposition patterns for cyclic diblock copolymer solution nanodroplets,enhancing applications related to droplet evaporation.

关键词： Cyclic diblock copolymer Nanodroplet Evaporation Deposition pattern Chain length and concentration

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超疏水多孔硅的制备及表面稳定性

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高等学校化学学报 2020年第7期41卷 1499-1504页

作者：苗笑梅毛克羽裴勇兵蒋剑雄颜悦吴连斌杭州师范大学有机硅化学及材料技术教育部重点实验室杭州311121

在加热条件下采用氢化硅烷化反应对多孔硅表面进行改性,通过扫描电子显微镜、红外光谱及元素分析等手段表征了多孔硅改性前后的结构和组成,研究了不同反应时间对其性能的影响.结果表明,反应3 h后制得了超疏水表面的多孔硅,其在碱性及空... 详细信息

在加热条件下采用氢化硅烷化反应对多孔硅表面进行改性,通过扫描电子显微镜、红外光谱及元素分析等手段表征了多孔硅改性前后的结构和组成,研究了不同反应时间对其性能的影响.结果表明,反应3 h后制得了超疏水表面的多孔硅,其在碱性及空气环境中具有良好的稳定性.

关键词：多孔硅超疏水稳定性

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Thermal effects on wear behavior of additively manufactured NiTi shape memory alloys

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Chinese Journal of Aeronautics 2025年第1期38卷 147-164页

作者： Xianghui HUANG Nan KANG pei WANG Mohamed EL MANSORI Arts et Metiers Institute of Technology MSMPHESAM UniversitéChâlons-en-Champagne 51006France Henan Key Laboratory of High-Performance Carbon Fiber Reinforced Composites Institute of Carbon Matrix CompositesHenan Academy of SciencesZhengzhou 450046China Texas A&M Engineering Experiment Station Institute for Manufacturing SystemsCollege StationTX 77843USA

NiTi alloys fabricated by laser powder bed fusion(LPBF)additive manufacturing technology not only address the compositional instability resulting from complex processes but also solve the challenges of difficult machining of intricate aerospace ***,there are very few reports on the wear behavior of LPBF-NiTi *** the present work,the effects of microstructure and thermal treatment,including heat treatment and frictional heat,on the wear behavior of LPBF-NiTi alloy and 100Cr6 ball were analyzed through a series of tribological experiments with different sliding *** the average sliding speed increases(0.079–0.216 m/s),the wear rate of the as-built and heat-treated samples tends to decrease in the range of 2.69×10^(-3)–0.97×10^(-3)mm^(3)/*** the heat-treated LPBF-NiTi alloy is 46%harder than the as-built alloy is,the latter has a higher toughness(505 MJ/m^(3))and greater transformation strain of SIM(0.097).This leads to a coupling effect of heat treatment and sliding speed on the wear *** addition,the wear track morphologies under different sliding speeds are asymmetric due to the 24% greater acceleration at the far end from the motor and the 2.15 mm deviation between the maximum speed position and the geometric center of the *** wear modes of the as-built and heat-treated samples included adhesive,abrasive and delamination ***,the wear morphologies and dominant wear modes change with the frictionally caused heat release induced by the sliding speed.

关键词： Additive manufacturing Laser powder bed fusion NiTi alloys Wear resistance Sliding speed

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Arsenic methylation and microbial communities in paddy soils under alternating anoxic and oxic conditions

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Journal of Environmental Sciences 2025年第2期148卷 468-475页

作者： Jing Liu Rui pei Runzeng Liu Chuanyong Jing Wenjing Liu Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and EngineeringShandong UniversityQingdao 266237China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Arsenic(As)methylation in soils affects the environmental behavior of As,excessive accumulation of dimethylarsenate(DMA)in rice plants leads to straighthead disease and a serious drop in crop *** the mobility and transformation of methylated arsenic in redox-changing paddy fields is crucial for food ***,soils including unarsenic contaminated(N-As),low-arsenic(L-As),medium-arsenic(M-As),and high-arsenic(H-As)soils were incubated under continuous anoxic,continuous oxic,and consecutive anoxic/oxic treatments respectively,to profile arsenic methylating process and microbial species involved in the As *** anoxic-oxic(A-O)treatment,methylated arsenic was significantly increased once oxygen was introduced into the incubation *** methylated arsenic concentrations were up to 2-24 times higher than those in anoxic(A),oxic(O),and oxic-anoxic(O-A)treatments,under which arsenic was methylated slightly and then decreased in all four As concentration *** fact,the most plentiful arsenite S-adenosylmethionine methyltransferase genes(arsM)contributed to the increase in As ***(40.8%-62.4%),Firmicutes(3.5%-15.7%),and Desulfobacterota(5.3%-13.3%)were the major microorganisms related to this *** microbial increasedmarkedly and played more important roles after oxygen was introduced,indicating that they were potential keystone microbial groups for As methylation in the alternating anoxic(flooding)and oxic(drainage)*** novel findings provided newinsights into the reoxidation-driven arsenic methylation processes and the model could be used for further risk estimation in periodically flooded paddy fields.

关键词： Arsenic methylation Anoxic-oxic Straighthead disease arsM gene Microbial community

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硅树脂改良阻燃材料的新进展

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中国材料进展 2018年第3期37卷 185-190页

作者：吴谦冯一峻裴勇兵肖文军吴连斌杭州师范大学有机硅化学及材料技术教育部重点实验室浙江杭州311121

硅树脂是一种主链为Si-O-Si,具有高度交联结构的热固性聚硅氧烷聚合物,其独特的分子链结构使得硅树脂不仅是一种耐高低温、耐老化和耐氧化的材料,同时也是一种无卤环保阻燃材料。硅树脂作为阻燃材料不仅可以提高高分子材料的热稳定性能... 详细信息

硅树脂是一种主链为Si-O-Si,具有高度交联结构的热固性聚硅氧烷聚合物,其独特的分子链结构使得硅树脂不仅是一种耐高低温、耐老化和耐氧化的材料,同时也是一种无卤环保阻燃材料。硅树脂作为阻燃材料不仅可以提高高分子材料的热稳定性能和阻燃性能,还不会影响高分子材料的可加工性和机械性能。硅树脂在燃烧过程中不会产生卤化氢等有毒气体,因此作为一种高效无卤环保阻燃材料已日益得到科研人员的关注。阐述了近年来硅树脂阻燃剂国内外的发展概况,着重介绍了硅树脂作为阻燃添加剂和阻燃涂层对高分子材料阻燃性能的影响规律及其阻燃机理。

关键词：硅树脂阻燃添加剂阻燃涂层高分子材料阻燃机理

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干燥预处理对EVA可再分散乳胶粉性能的影响

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江苏大学学报（自然科学版） 2010年第1期31卷 93-97页

作者：裴勇兵张心亚谢德龙阎虹陈焕钦华南理工大学化学与化工学院广东广州510640

通过试验用NaOH稀溶液、硅溶胶和聚乙烯醇(PVA)对乙烯-醋酸乙烯酯(EVA)乳液进行干燥预处理,采用喷雾干燥法制备EVA可再分散乳胶粉,并讨论pH值、硅溶胶、PVA对EVA可再分散乳胶粉含水率、残渣率、再分散性及再分散液胶膜等性能的影响.试... 详细信息

通过试验用NaOH稀溶液、硅溶胶和聚乙烯醇(PVA)对乙烯-醋酸乙烯酯(EVA)乳液进行干燥预处理,采用喷雾干燥法制备EVA可再分散乳胶粉,并讨论pH值、硅溶胶、PVA对EVA可再分散乳胶粉含水率、残渣率、再分散性及再分散液胶膜等性能的影响.试验结果表明,将EVA乳液pH值调节至9,用乳液质量25%的硅溶胶和5%的PVA对乳液进行干燥预处理,在雾化机旋转盘转速为21000r/min,进出口温度分别为170℃和90℃,进料速度为80g/min条件下进行喷雾干燥,制得的EVA可再分散乳胶粉含水率(ω=2.35%)和残渣率(ω=3.70%)低、再分散性及再分散液成膜良好.

关键词： EVA可再分散乳胶粉预处理喷雾干燥含水率残渣率

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H_(2)S and NIR light-driven nanomotors induce disulfidptosis for targeted anticancer therapy by enhancing disruption of tumor metabolic symbiosis

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Chinese Chemical Letters 2025年第1期36卷 427-432页

作者： Shangqian Zhang Jiaxuan Li Xuan Hu Zelong Chen Junliang Dong Chenhao Hu Shuang Chao Yinghua Lv Yuxin pei Zhichao pei College of Chemistry&Pharmacy Northwest A&F UniversityYangling 712100China

Disulfidptosis,a novel mechanism of programmed cell death through the disruption of tumor metabolic symbiosis(TMS),has showed tremendous potential in cancer ***,the efficacy of disulfidptosis is limited by poor permeability of drugs in solid ***,hydrogen sulfide(H_(2)S)and nearinfrared(NIR)light-driven nanomotors(denoted as HGPP)have been constructed to efficiently penetrate tumors and induce *** demonstrate glutathione(GSH)-responsive release of H_(2)S,which combined with NIR light-induced photothermal effect drive HGPP movement to facilitate deep tumor *** released H_(2)S induces tumor acidosis and disrupts TMS,where disulfide accumulation following cell starvation leads to *** addition,HGPP induce hepatoma specific cellular uptake and catalyze the conversion of glucose and oxygen to produce hydrogen peroxide(H_(2)O_(2)),leading to glucose ***,this study has developed a multifunctional Janus nanomotor that provides a novel strategy for disulfidptosis-based solid tumor therapy.

关键词： H_(2)S NIR light Nanomotors Disulfidptosis Tumor metabolic symbiosis

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On-chip light control of semiconductor optoelectronic devices using integrated metasurfaces

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Opto-Electronic Advances 2025年第1期8卷 5-30页

作者： Cheng-Long Zheng pei-Nan Ni Yi-Yang Xie Patrice Genevet Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of EducationSchool of PhysicsZhengzhou UniversityZhengzhou 450052China Key Laboratory of Optoelectronics Technology Beijing University of TechnologyMinistry of EducationBeijing 100124China Colorado School of Mines 1523 Illinois St.GoldenCO 80401USA

Semiconductor optoelectronics devices,capable of converting electrical power into light or conversely light into electrical power in a compact and highly efficient manner represent one of the most advanced technologies ever developed,which has profoundly reshaped the modern life with a wide range of *** recent decades,semiconductor technology has rapidly evolved from first-generation narrow bandgap materials(Si,Ge)to the latest fourth-generation ultra-wide bandgap semiconductor(GaO,diamond,AlN)with enhanced performance to meet growing ***,merging semiconductor devices with other techniques,such as computer assisted design,state-of-the-art micro/nano fabrications,novel epitaxial growth,have significantly accelerated the development of semiconductor optoelectronics *** them,integrating metasurfaces with semiconductor optoelectronic devices have opened new frontiers for on-chip control of their electromagnetic response,providing access to previously inaccessible degrees of *** review the recent advances in on-chip control of a variety of semiconductor optoelectronic devices using integrated metasurfaces,including semiconductor lasers,semiconductor light emitting devices,semiconductor photodetectors,and low dimensional *** integration of metasurfaces with semiconductors offers wafer-level ultracompact solutions for manipulating the functionalities of semiconductor devices,while also providing a practical platform for implementing cuttingedge metasurface technology in real-world applications.

关键词： optoelectronics nanophotonics metasurfaces semiconductor

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