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| 1 | Improved thermal conductivity and dielectric properties of flexible PMIA composites with modified micro-and nano-sized hexagonal boron nitride显示文摘A series of flexible poly(m-phenylene isophthalamide)(PMIA)-based composites with different sizes and mass fractions of hexagonal boron nitride(hBN)were successfully manufactured for the first time via the casting technique.The effects of modified hBN particles on microstructure,mechanical properties,dielectric properties and thermal conductivities of fabricated composites were investigated.The results indicate that modified hBN particles manifest good compatibility with the PMIA matrix.The Young's modulus and Theat-resistance index of PMIA-based composites are increased with increasing the mass fraction of hBN particles.Due to additional thermal conductive paths and networks formed by nano-sized hBN particles,the K-m/n-hBN-30 composite displays the thermal conductivity of 0.94 W·m^-1·K^-1 higher than that of the K-m-hBN-30 composite(0.86 W·m^-1·K^-1),and more than 4 times higher than that of neat PMIA.Moreover,the obtained PMIA-based composites also show low dielectric constant and ideal dielectric loss.Owing to the excellent comprehensive performance,hBN/PMIA composites present potential applications in the broad field of electronic materials. | Cuangyu DUAN Yan WANG Junrong YU Jing ZHU Zuming HU | 2019 | Frontiers of Materials Science2019，13，1： | 3 |
| 2 | Preparation and Characterization of regenerated cellulose fibers from a novel solvent system 显示文摘 | Zhenguo Li Panpan Hu Junrong Yu Zuming Hu and Zhaofeng Liu | 2008 | Jourmal Macromolecular Science Part B: Physics2008，47，2： | 1 |
| 3 | Properties and structures of terephthalyl chloride (TPC) modified metaaramid copolymers显示文摘 | CHEN Lei HU Zuming XIE Xinyu | | 0，，43： | 1 |
| 4 | Multifunctional tubular carbon nanofibers/polyurethane electromagnetic wave absorber with room-temperature self-healing and recyclable performance显示文摘Incorporating self-healing and recyclable capabilities into microwave absorbing materials is expected to facilitate the life extension,cost reduction,and performance stability,thereby meeting the practical applications.In this research,a recycling and room-temperature self-healing electromagnetic wave(EMW)absorber is designed,in which linear polyurethane cross-linked by aromatic disulfide bonds is used as healable matrix,and tubular carbon nanofibers(TCNFs)are employed to attenuate microwave.The resultant composites with a TCNFs content of 7 wt.%harvest a minimum reflection loss(RLmin)of−39.0 dB and an effective absorption bandwidth(EAB)of 2.9 GHz at a matching thickness of 4.0 mm.Driven by the reversible dynamic bonds including hydrogen bonds and aromatic disulfide bonds,the high healing efficiency of 88.7%at 25°C and 93.2%at 60°C is presented.Impressively,even after three repairing cycles at room temperature,a healable efficiency of 86.4%is acquired,and RLmin can still reach−39.1 dB at the same thickness,together with an EAB of 3.0 GHz.Additionally,the results of solvent recycling experiment manifest that the recycled specimen achieves the almost similar mechanical and microwave dissipation properties as original one.These attractive characteristics make the designed self-healing and recyclable composites promising for next-generation EMW consumption devices. | Shuai Kang Shiya Qiao Yutong Cao Zuming Hu Na Li Junrong Yu Yan Wang | 2023 | Nano Research2023，16，1： | 1 |
| 5 | Properties and structures of terephthalyl chloride (TPC) modified meta-Aramid copolymers显示文摘 | CHEN LEI HU ZUMING XIE XINYU | 2006 | Pure and Applied Chemistry2006，43，： | 1 |
| 6 | Flow behavior of heterocyclic aramid concentrated solution显示文摘 | Chen Lei Hu Zuming Gao Baoshan | 2011 | Ady Mater Res2011，，146147： | 1 |
| 7 | Properties and structures of terephthalyl chloride (TPC) modified meta-Aramid copolymers显示文摘 | CHEN Lei HU Zuming XIE Xinyu | 2006 | Pure and Applied Chemistry2006，，43： | 1 |
| 8 | Atmospheric Drying UHMWPE Membranes via Multiple Stage Extractant Exchange Drying Technique显示文摘Ultra-high molecular weight polyethylene(UHMWPE)membranes were prepared by 5 wt%UHMWPE/parafn oil gels via thermally induced phase separation method and dried in air without signifcant collapse.The UHMWPE membranes were annealed at 110℃ for increasing the pores size in order to decrease the capillary forces.Furthermore,a new multiple stage extractant exchange drying(MSEED)technique was adopted to decrease the shrinkage of the UHMWPE membranes.Specifcally,the parafn oil was extracted by dichloromethane,then dichloromethane was replaced by ethanol,next ethanol could be exchanged to other liquid which is non-afnity with UHMWPE,for example water.UHMWPE membranes(annealing for 25 min)dried by dichloromethane-ethanol-water-air process have the lowest volume shrinkage of 16.5%and the porosity is as high as 88.29%.Moreover,compared with supercritical CO_(2)(SC-CO_(2))drying,atmospheric drying UHMWPE membranes have a lower pure water permeance,but a higher carbon particles rejection. | Jiayou Quan Qingquan Song Junrong Yu Yan Wang Jing Zhu Zuming Hu | 2022 | Advanced Fiber Materials2022，4，2： | 1 |
| 9 | Dissolving of Ultra‑high Molecular Weight Polyethylene Assisted Through Supercritical Carbon Dioxide to Enhance the Mechanical Properties of Fibers显示文摘The molecular weight of ultra-high molecular weight polyethylene(UHMWPE)fbers is severely decreased compared with raw materials due to high temperature and strong shearing in the dissolving process.In this study,we reported a novel method to assist the dissolving of UHMWPE in parafn oil without severe degradation in order to improve the tensile strength of resultant fbers.UHMWPE fbers with relatively high molecular weight and more excellent disentanglement efect were prepared by gel-spinning with UHMWPE suspension treated with supercritical carbon dioxide(SC-CO_(2)).The dynamic thermomechanical,mechanical and crystalline properties of UHMWPE extracted fbers and drawn fbers were researched comprehensively.UHMWPE extracted fbers obtained after SC-CO_(2) treatment display a higher molecular weight.More importantly,it is clear that the disentanglement of UHMWPE gel fbers gained by processing SC-CO_(2) has been signifcantly promoted compared with that without SC-CO_(2) treatment from dynamic thermomechanical and rheological results,which could also be demonstrated from the cross-sectional morphology of UHMWPE extracted fbers.Furthermore,the tensile strength of UHMWPE fbers prepared through SC-CO_(2) treating is able to attain 30.11 cN/dtex,increased by 10.3%in comparison to UHMWPE fbers gained without assistance of SC-CO_(2).Beyond that,the thermal behavior and crystallization performance of UHMWPE extracted fbers and drawn fbers acquired by way of SC-CO_(2) treatment have also been enhanced. | Yi Wang Jiabin Fu Junrong Yu Qingquan Song Jing Zhu Yan Wang Zuming Hu | 2022 | Advanced Fiber Materials2022，4，2： | 1 |
| 10 | Dramatical hydro-sedimentary changes induced by bamboo fences over mangrove tidal flat of the largest delta in Beibu Gulf, southwestern China显示文摘Mangrove forest is one of the most important ecological and environmental resources by effectively promoting tidal flat deposition and preventing the coastal region from typhoon.However,there have been mass loss of mangrove forests due to anthropogenic activities.It is an urgent need to explore an effective way for mangrove restoration.Here,three rows of bamboo fences with hydro-sedimentary observation set over Aegiceras corniculatum mangrove tidal flat of the Nanliu Delta,the largest delta of Beibu Gulf,China,were conducted to analyze the hydro-sedimentary variations induced by bamboo fences.Results identified that the mean horizontal velocity Um per burst(20 min)decreased by as much as 71%and 40%in comparison with those without bamboo fences in March and November,respectively,when the tidal current entering the bamboo area during flood.The maximum of mean horizontal flow velocity Um-max at bamboo area was 50%–75%of that without bamboo fences during ebb tide.The suspended sediment concentration of bamboo area suggested a maximum reduction of 57%relative to bare flat during flood,and was 80%lower than bare flat at ebb peak.Moreover,the turbulent kinetic dissipationεat flood tide was significantly higher than that at ebb tide,while the bamboo fences greatly increased the turbulent kinetic dissipationεby 2 to 5 times relative to bare flat,resulting in an increase of the bed elevation by inhibiting the sediment incipient motion and intercepting suspended sediment.The siltation rate at the bamboo area was 140%and 29.3%higher than that at the bare flat and the region covered with A.corniculatum,respectively.These results highlight that bamboo fences can effectively attenuate tidal current and thus promote siltation over mangrove flat,which contribute great benefit to mangrove survival. | Zuming Huang Zhijun Dai Riming Wang Xiaoyan Zhou Wenhong Pang Jiejun Luo Bingbin Feng Baoqing Hu | 2023 | Acta Oceanologica Sinica2023，42，7： | 0 |
| 11 | Preparation of a novel cross-linked polyetherimide with enhanced breakdown strength and high-temperature energy storage performance显示文摘Polymer dielectrics with excellent energy storage performance at high temperature are urgently needed in advanced applications,such as hybrid electric vehicles,smart grid and pulsed power sources.Polyetherimide(PEI),which is supposed to be the most promising candidate among polymer dielectric materials,displays a limitation for high-temperature polymer dielectrics owing to the rapidly decreasing discharged energy density(U_(d))and charge-discharge efficiency(η).Herein,a novel PEI with cross-linked networks was firstly prepared by utilising 2,4,6-Triaminopyrimidine(TAP)as a cross-linker.The results showed that the breakdown strength of the cross-linked PEI(c-PEI)with 2 wt%TAP increased to 399.4 MV/m,showing an increment of 23.3%in comparison with noncross-linked PEI.Additionally,owing to the restrained polarisation loss and relaxation loss by cross-linked networks,the dielectric loss of c-PEI dielectric gradually decreased with the increasing content of TAP.Of particular significance was the c-PEI dielectrics exhibiting improved U_(d)andηat high temperature.The maximum U_(d)of c-PEI with 2 wt%TAP was 2.53 J/cm3 at 150℃,which was 24.8%higher than non-cross-linked PEI(2.11 J/cm^(3)at 150℃).This research provides an innovative strategy to achieve novel PEI dielectrics with improved U_(d)andηat high temperature. | Guangyu Duan Fengying Hu Ruina Zhang Zuming Hu | 2023 | High Voltage2023，8，3： | 0 |
| 12 | Jet Shaping Nanofibers and the Collection of Nanofiber Mats in Electrospinning显示文摘Electrospinning 是生产 nanofibers 的一个有效方法。集中或旋转解决方案的相应粘性是最重要的变量之一在卡住的电镀物品控制纤维形态学。喷气塑造 nanofibers 可能为不同答案粘性在二个操作模式被划分:裂口变瘦并且单个变瘦。从喷气单身者变瘦的分析,计算扔在收集者的 nanofibers 的速度的一个方程被引出,速度范围与报导结果很不同,这被发现。为旋转地席从低答案集中获得了的电镀物品,裂口被扫描电子显微镜学(SEM ) 观察图象。在另一方面,在 thenanofiber 地席的祷告形成能被喷气切开解释很好。在地席的 nanofibers 的安排与收集的方法有关,并且柱体收集者得到更多的订的地席。Thisresult 被测试的所谓的裂缝力量和从收集的不同方法获得的地席的 SEM 图象证明。 | Xinwei WANG Jin CAO Zuming HU Wanlian PAN Zhaofeng LIU | 2006 | Journal of Materials Science & Technology2006，22，4： | 0 |
| 13 | The Structure and Properties of Polyethylene Oxide Reinforced Poly(Metaphenylene Isophthalamide)Fibers显示文摘In this paper,the efect of poly(ethylene oxide)(PEO)as an additive on the structure and properties of poly(m-phenylene dimethylene terephthalamide)(PMIA)fbers obtained by wet spinning was investigated.The tensile strength of the composite fbers was substantially enhanced compared to the pure PMIA fber.This was due to the fact that the addition of PEO weakens the hydrogen bonding between PMIA molecular chains resulting in an improved orientation of the composite fbers.It was found that the optimum PEO addition was 2%and the tensile strength of the composite fber was 4.74 cN/dtex,which was 76%higher compared to the pure PMIA fber.However,the heat resistance and fame retardancy of the composite fbers were basically unchanged compared to the pure PMIA fber.The modifcation method is simple,with low raw material cost and good stability,and has not only good academic value but also excellent industrial value. | Qingquan Song Wenwen Wu Yi Wang Junrong Yu Zuming Hu Yan Wang | 2022 | Advanced Fiber Materials2022，4，3： | 0 |
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