俞炜教授

电子邮件:wyu@sjtu.edu.cn
通讯地址:上海市东川路800号化学化工学院A楼501室

  • 教育背景

    1992-1996:上海交通大学应用化学系,本科

    1996-2001:上海交通大学化学化工学院,博士(材料学)

  • 工作经历

    2001-2002:加拿大Laval大学化工系和大分子研究中心,博士后

    2003-2004:上海交通大学化学化工学院,讲师

    2005-2008:上海交通大学化学化工学院,副教授

    2006至今 :上海交通大学流变学研究所,常务副所长

    2009至今 :上海交通大学化学化工学院,教授,博士生导师

  • 研究方向

    复杂流体流变学与动力学: 
    polymer melts and solutions, block copolymers, polymer composites/nanocomposites, emulsions, suspensions, gels
    化学流变学: 
    kinetics and mechanism of chemical reactions in polymeric systems under flow field
    相转变与临界现象:
    liquid-solid transition, liquid-liquid phase separation, crystallization of polymers
    本构模型与多尺度计算机模拟: 
    rheological constitutive theory for polymer melts/polymer blends/composites, multiscale simulation of polymer blend/composites, simulation of polymer processing
    高性能聚合物材料: 
    microporous membranes, polymer alloys, vitrimers, polymer foams, gels

  • 科研项目

    国家杰出青年科学基金、国家自然科学基金重大项目、国家重点基础研究发展计划(973计划)、国家自然科学基金重点项目、国家自然科学基金面上项目等。



  • 代表性论文专著

    1.     Wei You(尤伟), Wenzhi Cui(崔文志), Wei Yu*, “Decoupling hydrodynamic and entanglement effects on the modulus reinforcement of grafted silica filled nanocomposites through Thermal and rheological features”, Polymer, 2021, 213, 123323 https://doi.org/10.1016/j.polymer.2020.123323

    2.     Zhaoming Zhang#, Lin Cheng#(程林), Jun Zhao, Hao Zhang, Xinyang Zhao, Yuhang Liu, Ruixue Bai, Hui Pan, Wei Yu, and Xuzhou Yan* "Muscle-Mimetic Synergistic Covalent and Supramolecular Polymers: Phototriggered Formation Leads to Mechanical Performance Boost" J. Am. Chem. Soc. 2021, 143(2), 902–911. https://doi.org/10.1021/jacs.0c10918

    3.     Kai Liu#, Lin Cheng#(程林), Ningbin Zhang#, Hui Pan, Xiwen Fan, Guangfeng Li, Dong Zhao, Zhaoming Zhang, Jun Zhao, Xue Yang, Yongming Wang, Ruixue Bai, Zhiyuan Liu, Sheng Wang, Xinglong Gong, Guoying Gu*, Wei Yu* and Xuzhou Yan* "Biomimetic Impact Protective Supramolecular Polymeric Materials Enabled by Quadruple H-Bonding" J. Am. Chem. Soc. 2021, 143, 2, 1162-1170 https://doi.org/10.1021/jacs.0c12119

    4.     Zhongqiang Xiong(熊钟强), Wei Yu*, "Orientation-stretch coupled nonlinear model of comb polymer", J. Rheol., 2021, 65(2), 113-128. https://doi.org/10.1122/8.0000094

    5.     Leslie Poh, Benke Li(李本科), Wei Yu, Esmaeil Narimissa*, and Manfred H. Wagner, "Modelling of nonlinear extensional and shear rheology of low-viscosity polymer melts" Polym. Eng. Sci., 2021, 61, 1077–1086. https://doi.org/10.1002/pen.25637

    6.     Wenzhi Cui(崔文志), Wei You(尤伟), Wei Yu*, "Mechanism of Mechanical Reinforcement for Weakly Attractive Nanocomposites in Glassy and Rubbery States" Macromolecules, 2021, 54, 2, 824-834 https://doi.org/10.1021/acs.macromol.0c02156

    7.     Marouen Zammali, Sijun Liu, Wei Yu*, "Symmetry breakdown in the sol-gel transition of a Guar gum transient physical network", Carbohydrate Polymers 2021, 258, 117689 https://doi.org/10.1016/j.carbpol.2021.117689

    8.     Yanjie Wang(王艳洁), Sijun Liu*, Wei Yu*, "Functionalized Graphene Oxide-Reinforced Chitosan Hydrogel as Biomimetic Dressing for Wound Healing", Macromolecular Bioscience 2021, 20200432. https://doi.org/10.1002/mabi.202000432

    9.     Benke Li(李本科), Ying Guo, Paul Steeman, Markus Bulters, Wei Yu*, "Shear-induced breakdown and agglomeration in nanoparticles filled polymer: The shift of phase boundary and kinetics", J. Rheol. 2021, 65, 291-309. https://doi.org/10.1122/8.0000032

    10.  Wei You(尤伟), Wei Yu*, “Characteristic rheological behaviors in startup shear of entangled polymer melts”, Nihon Reoroji Gakkaishi (Journal of the Society of Rheology, Japan), 2021, 49(1), 1-5. https://doi.org/10.1678/rheology.49.1

    11.  Xiang Liu(刘香), Wei Yu*, "Weak Shear-Induced Slowdown in Crystallization of Less-Entangled Poly(ε-caprolactone)", Macromolecules, 2021, 54, 3347–3357 https://doi.org/10.1021/acs.macromol.1c00204

    12.  Lin Cheng(程林), Sijun Liu, Wei Yu*, "Recyclable ethylene-vinyl acetate copolymer vitrimer foams", Polymer, 2021, 222, 123662. https://doi.org/10.1016/j.polymer.2021.123662

    13.  Bonan Hao(郝博男), Benke Li(李本科), Sijun Liu, Wei Yu*, “Non-equilibrium Structure Diagram of Pendular Suspensions under Large Amplitude Oscillatory Shear", Langmuir 2021, 37, 6208-6218 https://doi.org/10.1021/acs.langmuir.1c00367

    14.  Marouen Zammali, Sijun Liu*, Wei Yu*, "A Biomimetic Skin-like Sensor with Multiple Sensory Capabilities based on Hybrid Ionogel", Sensors and Actuators A: Physical 2021, 330, 112855. https://doi.org/10.1016/j.sna.2021.112855

    15.  Wenzhi Cui(崔文志), Wei You, Zhaoyan Sun, Wei Yu*, "Decoupled Polymer Dynamics in Weakly Attractive Poly(methyl methacrylate)/Silica Nanocomposites", Macromolecules 2021, 54, 12, 5484-5497. https://doi.org/10.1021/acs.macromol.1c00264

    16.  Zhongqiang Xiong(熊钟强), Wei Yu*, "Molecular constitutive equation for unentangled branch copolymers", Rheologica Acta 2021, 60, 439-455 https://doi.org/10.1007/s00397-021-01273-5

    17.  Benke Li(李本科), Ying Guo, Paul Steeman, Markus Bulters, Wei Yu*, “Wall effect on the rheology of short-fiber suspensions under shear” J. Rheol. 2021, 65, 1169-1185 https://doi.org/10.1122/8.0000292

    18.  Lin Cheng(程林), Benke Li(李本科), Sijun Liu, Wei Yu*, “Vitrimer bead foams: cell density control by cell splitting in weld-compression molding”, Polymer 2021, 232, 124159 https://doi.org/10.1016/j.polymer.2021.124159

  • 荣誉奖励

    第6届“冯新德高分子奖”提名奖 (2012年)
    教育部新世纪优秀人才计划 (2011年)
    第5届“冯新德高分子奖”提名奖 (2011年)
    Polymer Processing Society, Morand Lambla Award (2010年)
    上海交通大学晨星学者奖励(2010年)
    中国化学会青年化学奖(2009年)
    上海高校优秀青年教师(2008年)
    上海交通大学优秀教师三等奖(2006年)
    中国流变学青年奖(2005年)

  • 人才需求

    课题组常年招聘具有高分子化学、材料化学、化学工程、高分子物理、高分子加工、流变学、力学等相关专业背景的博士后,待遇从优,欢迎来信咨询。

  • 文件共享

    非线性流变学:大振幅振荡剪切(large amplitude oscillatory shear, LAOS)

    1.      振荡剪切流动

    当给样品施加正弦的应变或应力时,所产生的流动称为振荡剪切流动,流动由所施加应变或应力的幅度和频率控制。所施加应变幅度很小时,样品产生的应力响应是有相位角的正弦信号;当施加应变幅度增加时,应力响应逐渐偏离正弦波。随着应变幅度的增加,应力-应变、应力-应变速率曲线(Lissajous曲线)逐渐偏离椭圆。

    1642239420881247.png

    Carbopol微凝胶在不同幅度振荡应力下的应力-应变(a)和应力-应变速率(b)Lissajous曲线

    2.      傅里叶变换流变学

    解析振荡剪切行为最直接的方法是利用傅里叶变换,将时间域的信号转换到频率域,由倍频信号的强度判断偏离正弦信号的程度[1]。由于对称性,剪切应力应该只出现奇数倍频,而法向应力差只出现偶数倍频[3-4]。利用基频信号定义的是应变趋于零时的线性黏弹性函数(对应于小振幅振荡剪切SAOS),类似的可以定义高阶倍频下的特征模量[11],最常用的是三阶倍频特征函数(对应于中等振幅振荡剪切MAOS)。傅里叶变换流变学的缺点在于高阶倍频下的特征函数缺乏明确的物理意义。大量的研究表明,MAOS和LAOS特征函数能够比SAOS特征函数更敏感的表示出材料结构的细微差别[6,7,8]。

    1642239437838130.png

    剪切应力随时间的变化(a)及其傅里叶变换(b),

    第一法向应力差随时间的变化(c)及其傅里叶变换(d),

    烯烃嵌段共聚物的储能模量G’11,0(e)与三倍频特征函数Q3,0(f)

    3.      几何平均分析

    另一种解析LAOS行为的方法是几何平均方法[5],即通过闭合应力-应变曲线对应力或应变取算术平均,得到平均应力-应变曲线和应力-平均应变曲线;对应力-应变速率曲线可得到类似的平均曲线。几何平均曲线在特定条件下可以通过Chebyshev多项式建立与傅里叶变换流变学的关系[2]。几何平均方法不依赖于LAOS的实验方法(控制应变或控制应力),特别适合复杂流体(如屈服应力流体)屈服转变[10]、壁面滑移[9]等方面研究。

    1642239460819626.png

    应力-应变曲线的几何平均(a)和应力-应变速率曲线的几何平均(b),

    表征屈服转变的应力分岔(c),平均应力-应变速率关系确定壁面滑移特征(d)

    代表性论文

    1. Jianye Liu, Wei Yu*, Chixing Zhou, “Evaluation on the degrading behavior of melt polyolefin elastomer with dicumyl peroxide in oscillatory shear flow by Fourier transform rheology”, Polymer, 2008, 49, 268-277 https://doi.org/10.1016/j.polymer.2007.11.014

    2. Wei Yu*, Peng Wang, Chixing Zhou, "General stress decomposition in nonlinear oscillatory shear flow", Journal of Rheology, 2009, 53(1), 215-238 https://doi.org/10.1122/1.3037267

    3. Ying Guo, Wei Yu*, Yuanze Xu, Chixing Zhou,"Correlations between Local Flow Mechanism and Macroscopic Rheology in Concentrated Suspensions under Oscillatory Shear", Soft Matter, 2011, 7, 2433-2443 https://doi.org/10.1039/C0SM00970A

    4. 杜宇,杨凯,俞炜*,周持兴,触变/非触变水凝胶的傅里叶变换流变学研究,高分子学报,2012, 12, 1376-1382 http://web.gfzxb.org/article/doi/10.3724/SP.J.1105.2012.12197 

    5. Wei Yu*, Yu Du, Chixing Zhou, "A New Geometric Decomposition in Nonlinear Oscillatory Shear", Journal of Rheology, 2013, 57, 1147-1175 https://doi.org/10.1122/1.4805093

    6. Peng He, Wei Yu*, Chixing Zhou, "Mesophase Separation Transitions in Polydisperse Olefin Multiblock Copolymer Melts", Macromolecules, 2014, 47, 807-820 https://doi.org/10.1021/ma402330a

    7. Zhijun Nie, Wei Yu*, Chixing Zhou, “Nonlinear rheological behavior of multiblock copolymers under large amplitude oscillatory shear”, Journal of Rheology, 2016, 60(6), 1161-1179. https://doi.org/10.1122/1.4961483

    8. Kai Yang, Jun Wang, Wei Yu*, "Two dimensional mechanical correlation analysis on nonlinear oscillatory shear flow of yield stress fluids", Korean-Austrialian Rheology Journal, 2016, 28(3), 175-180 https://doi.org/10.1007/s13367-016-0017-4 

    9. Kai Yang, Wei Yu*, “Dynamic wall slip behavior of yield stress fluids under large amplitude oscillatory shear”, Journal of Rheology, 2017, 61(4), 627-641 https://doi.org/10.1122/1.4982704

    10. Kai Yang, Zhiwei Liu, Jun Wang, Wei Yu*, Chixing Zhou, “Stress bifurcation in large amplitude oscillatory shear of yield stress fluids”, Journal of Rheology, 2018, 62, 89-106  https://doi.org/10.1122/1.4986062

    11. Zhiwei Liu, Zhongqiang Xiong, Zhijun Nie, Wei Yu*, “Correlation between linear and nonlinear material functions under large amplitude oscillatory shear”, Physics of Fluids, 2020, 32, 093105 https://doi.org/10.1063/5.0021792



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