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| 1 | Tough and tunable adhesion of hydrogels:experiments and models显示文摘As polymer networks infiltrated with water, hydrogels are major constituents of animal and plant bodies and have diverse engineering applications. While natural hydrogels can robustly adhere to other biological materials, such as bonding of tendons and cartilage on bones and adhesive plaques of mussels, it is challenging to achieve such tough adhesions between synthetic hydrogels and engineering materials. Recent experiments show that chemically anchoring long-chain polymer networks of tough synthetic hydrogels on solid surfaces create adhesions tougher than their natural counterparts, but the underlying mechanism has not been well understood. It is also challenging to tune systematically the adhesion of hydrogels on solids. Here, we provide a quantitative understanding of the mechanism for tough adhesions of hydrogels on solid materials via a combination of experiments, theory, and numerical simulations.Using a coupled cohesive-zone and Mullins-effect model validated by experiments, we reveal the interplays of intrinsic work of adhesion, interfacial strength, and energy dissipation in bulk hydrogels in order to achieve tough adhesions. We further show that hydrogel adhesion can be systematically tuned by tailoring the hydrogel geometry and silanization time of solid substrates, corresponding to the control of energy dissipation zone and intrinsic work of adhesion, respectively.The current work further provides a theoretical foundation for rational design of future biocompatible and underwater adhesives. | Teng Zhang Hyunwoo Yuk Shaoting Lin German A.Parada Xuanhe Zhao | 2017 | Acta Mechanica Sinica2017，33，3： | 6 |
| 2 | Recent advance in electromagnetic shielding of MXenes显示文摘As a new type of two-dimensional material,MXene’s unique layered structure,outstanding electrical conductivity,low density,tunable surface chemistry,and solution processability make it receive extensive attention in various fields,especially for the lightweight shielding mate rials since the report on electromagnetic interference(EMI) shielding of 2D Ti3 C2 Tx in 2016.In this review,the progress on the MXe nes material including their synthetic strategies,prope rties and EMI application is highlighted.First,the recent advance on the different synthesis methods and properties of MXene is summarized.According to their intrinsic characteristics,the application of MXene in EMI fields is then discussed.Finally,the challenges and perspective on the future development of MXene in low-cost preparation and practical application are proposed. | Yanqing Yao Jia Zhao Xuanhe Yang Chunpeng Chai | 2021 | Chinese Chemical Letters2021，32，2： | 5 |
| 3 | An improved wall shear stress measurement technique using sandwiched hot-film sensors显示文摘In this letter we present a novel wall shear stress measurement technique for a turbulent boundary layer using sandwiched hot-film sensors. Under certain conditions, satisfactory results can be obtained using only the heat generated by one of the hot-film and a calibration of the sensors is not required. Two thin Nickel films with the same size were used in this study, separated by an electrical insulating layer. The upper film served as a sensor and the bottom one served as a guard heater. The two Nickel films were operated at a same temperature, so that the Joule heat flux generated by the sensor film transferred to the air with a minimum loss or gain depending on the uncertainties in the film temperature measurements. Analytical solution of the shear stress based on the aforementioned heat flux was obtained. The preliminary results were promising and the estimated wall shear stresses agreed reasonably well with the directly measured values(with errors less than 20%) in a fully developed turbulent pipe flow. The proposed technique can be improved to further increase precisions. | Xuanhe Liu Zhuoyue Li Nan Gao | 2018 | Theoretical & Applied Mechanics Letters2018，8，2： | 3 |
| 4 | Detection of Hydrazine at MXene/ZIF-8 Nanocomposite Modified Electrode显示文摘ZIF-8 with excellent chemical and physical properties is a promising material for the field of electrochemical sensing.However,the poor electrical conductivity of ZIF-8 severely limits its electrochemical performance.Here,we report a method that can significantly improve the conductivity of ZIF-8 by intercalating Ti_(3)C_(2)T_(x) MXene as a conductive platform.Benefiting from higher conductivity and unique electrocatalytic activity,the obtained MXene/ZIF-8 nanocomposite presented the worthy analytical performance for hydrazine sensing.The successful fabrication of MXene/ZIF-8 holds great promise for the design of electrochemical sensors,and it is a promising material to promote the development of new electrode materials. | Yanqing Yao Xuhui Han Xuanhe Yang Jia Zhao Chunpeng Chai | 2021 | Chinese Journal of Chemistry2021，39，2： | 1 |
| 5 | Targeting cellular senescence prevents glucocorticoid-induced bone loss through modulation of the DPP4-GLP-1 axis显示文摘Dear Editor,Glucocorticoids(GCs)often cause detrimental side effects,including osteoporosis and osteonecrosis,with no specific drugs available to circumvent these problems.1 Cellular senescence plays an essential role in bone loss,2,3 where senescent cells release various factors,termed senescence-associated secretory phenotype(SASP),which influences neighboring cells and disrupts normal tissues.2 Glucocorticoids can induce senescence in bone cells in young mice;2 however,the effects of GCs on senescence and SASP during bone metabolism in adult mice are unclear. | Tiantian Wang Lin Yang Zejun Liang Lin Wang Feijing Su Xiangxiu Wang Xuanhe You Chengqi He | 2021 | Signal Transduction and Targeted Therapy2021，6，5： | 1 |
| 6 | Method to analyze electromechanical stability of dielectric elastomers 显示文摘 | Xuanhe Zhao Zhigang Suo | 2007 | APPLIED PHYSICS LETTERS2007，91，： | 1 |
| 7 | Multi-scale multi-mechanism design of tough hydrogels: building dissipation into stretchy networks显示文摘 | Zhao Xuanhe | 2014 | Soft Matter2014，10，5： | 1 |
| 8 | Designing extremely resilient and tough hydrogels via delayed dissipation显示文摘 | Lin Shaoting Zhou Yihao Zhao Xuanhe | 2014 | Extreme Mech Lett2014，1，： | 1 |
| 9 | Solid acid co-catalyst for the hydrogenolysis of glycerol to 1,3-propanediol over Ir-ReOx/SiO2显示文摘 | Nakagawa Y Ning Xuanhe Amada Y | 2012 | Applied Catalysis A:General2012，，： | 1 |
| 10 | A nonlinear field theory of deformable dielectrics显示文摘 | Suo Zhigang Zhao Xuanhe Greene W H | 2008 | Journal of the Me- chanics and Physics of Solids2008，56，2： | 1 |
| 11 | A nonlinear field theory of deformable dielectrics显示文摘 | Zhigang Suo Xuanhe Zhao William H. Greene | 2007 | Journal of the Mechanics and Physics of Solids2007，，2： | 1 |
| 12 | Large deformation and electrochemistry of polyelectrolyte gels显示文摘 | WEI H XUANHE Z ZHIGANG S | 2010 | Journal of the Mechanics and Physics of Solids2010，58，4： | 1 |
| 13 | Inlfuenee of la- ser cladding process on the magnetic properties of WC-FeNi- Cr metal-matrix composite coatings显示文摘 | Yang Jiaoxi Liu Falan Miao Xuanhe | 2012 | J Mater Process Technol2012，212，9： | 1 |
| 14 | Influence of laser cladding process on the magnetic properties of WC–FeNiCr metal–matrix composite coatings显示文摘 | Jiaoxi Yang Falan Liu Xuanhe Miao Feng Yang | 2012 | Journal of Materials Processing Tech2012，，9： | 1 |
| 15 | Propagation of instability in dielectric elastnmers 显示文摘 | Zhou Jinxiong Hong Wei Zhao Xuanhe | 2008 | International Journal of Solid and Structures2008，45，13： | 1 |
| 16 | The effect of Ti additions on the microstructure and magnetic properties of laser clad FeNiCr/60%WC coatings显示文摘 | Jiaoxi Yang Zhiyong Xiao Xuanhe Miao | 2015 | Int J Refractory Metals Hard Materials2015，52，： | 1 |
| 17 | Cideb, an ER- and Lipid Droplet-Associated Protein, Mediates VLDL Lipidation and Maturation by Interacting with Apolipoprotein B显示文摘 | Jing Ye John Zhong Li Yang Liu Xuanhe Li Tianshu Yang Xiaodong Ma Qing Li Zemin Yao Peng Li | 2009 | Cell Metabolism2009，，2： | 1 |
| 18 | Highly stretcha- ble and tough hydrogels显示文摘 | Jeong-Yun S Xuanhe Z Illeperuma W R K | 2012 | Nature2012，489，7414： | 1 |
| 19 | Coupled heat-fluid-solid numerical study on heat extraction potential of hot dry rocks based on discrete fracture network model显示文摘Fracture networks within hot dry rock(HDR)geothermal reservoirs are complex,and heat extraction via water injection is thus a coupled process of heat-fluid-solid multifield.In this paper,utilizing the theory of normally distributed random functions,we develop a corresponding pre-processing subprogram to establish a discrete network model of complex fracture distribution in HDR reservoirs;then construct a heat-fluid-solid finite element model for heat extraction via water injection and compare the numerical solution with the analytical solution of the one-dimensional non-isothermal consolidation problem for verification.The numerical simulation results show that the main factors affecting the heat extraction efficiency of HDR reservoirs include fracture width,fracture density,fracture permeability,and matrix permeability.When a HDR reservoir is injected with water for heat extraction,there is a certain threshold value of these influential parameters,beyond which the outlet temperature drops significantly,resulting in an obvious thermal breakthrough.When injecting water for heat extraction,the values of these parameters should be controlled and kept at a reasonable level,otherwise,the HDR reservoir may enter a thermal breakthrough stage in advance,which is not conducive for long-period heat extraction.Influenced by the random distribution of complex fractures,the leading edge of the cold front may present an irregular distribution.During the process of heat extraction,the stress gradually changes from a compressional state to a tensile state,which induces further damage to the HDR reservoir. | Daobing Wang Haiyan Zhu Marembo Micheal Xuanhe Tang Qin Li Xiangyi Yi Dongliang Sun Bo Yu Qiang Liu | 2023 | Energy Geoscience2023，4，4： | 0 |
| 20 | Functional Tough Hydrogels: Design, Processing, and Biomedical Applications显示文摘Hydrogels are high-water-content soft materials with widely tunable physicochemical properties,resembling soft tissues.Tremendous progress in engineering hydrogels with good biocompatibility,suitable bioactivities,and controlled geometries has made them promising candidates for broad applications.Nevertheless,conventional hydrogels usually suffer from weak mechanical properties,limiting their use in biomedical settings involving load-bearing and persistent mechanical deformations.Inspired by the extreme mechanical properties and multiscale hierarchical structures of biological tissues,mechanically robust tough hydrogels have been developed.Combining robust mechanical properties and other desired performance characteristics in functional tough hydrogels expands their opportunities in biomedical fields.This Account seeks to guide the readership regarding the recent progress in functional tough hydrogels with a focus on molecular/structural design and novel fabrications,particularly surrounding the works reported by our groups.Meanwhile,functional tough hydrogels for multiple biomedical applications are discussed,highlighting the underlying mechanisms governing their relevant applications.We begin by introducing the definition,measurements,and design principles of tough hydrogels and hydrogel adhesives in terms of soft materials mechanics.Various molecular and structural engineering approaches by building mechanical dissipation into stretchable hydrogels to realize stress homogenization or energy dissipation are exploited to fabricate tough hydrogels.Molecular engineering-based network architecture design of homogeneous hydrogels and structural engineering-based design of heterogeneous hydrogels are elaborated.The conventional energy-dissipation-based tough hydrogels are reinforced by the sacrificial bonds or components,leading to a substantial toughness reduction in subsequent loading cycles.To this end,new molecular designs,including highly entangled hydrogels and sliding-ring hydrogels,have been developed to resolve the toughness−hysteresis conflict.In addition,novel processing techniques,including salting out,freeze casting,and three-dimensional(bio)printing,are exploited to manipulate the multiscale structures and geometries for tough hydrogel fabrication.As some of the most actively studied materials in recent years,functional tough hydrogels are finding promising applications as bioadhesives/coatings,tissue-engineering scaffolds,soft robot/actuators,and bioelectronics interfaces.The development of tough bioadhesives/coatings lies in constructing strong interfacial linkages between the tough hydrogels and the underlying substrates,having broad applications in wound closure and drug delivery.Tough hydrogels have also been widely studied for use in tissue engineering and regenerative medicine,although the conflict of mechanical robustness−cellular function restricts their practical applications.The flexible and compliant tough hydrogels with stimuli-responsive shape shifting and pressure-triggered actuation make them good candidates as actuators and soft robots for biomedical devices dealing with soft tissues.Conductive tough hydrogels also have been widely exploited for utility in bioelectronics.In the end,we highlight the major challenges and emphasize the trends in developing the next-generation functional tough hydrogels for practical biomedical and medical applications. | Xiao Kuang Mehmet Onur Arıcan Tao Zhou Xuanhe Zhao Yu Shrike Zhang | 2023 | Accounts of Materials Research2023，4，2： | 0 |
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