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Durable Asphalt Pavements Are self healing

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武汉理工大学学报 2010年第17期32卷 30-34页

作者： QIU J VAN DE VEN M F C WU S P YU J Y MOLENAAR A A A Delft University of Technology P.O. Box 50482600 GA Delftthe Netherlands Key Laboratory of Silicate Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

The traffic volume and the number of heavy vehicles are growing continuously. Considering the continuous traffic flow and the limited time available for road maintenance,it is very important to design a durable pavement system. Asphalt pavements with a healing capability are believed to be very useful since they can extend the pavement service life thanks to rest periods and hot summers. In order to design durable asphalt pavements,research in understanding and upgrading the self-healing capability of bituminous materials in time is of major importance. The self healing capability of bituminous mastic was evaluated in this research with a direct tension healing test. In the test program,different healing times,crack status and modifications were applied. The results indicate that elastic recovery and flow capacity are important factors for the self healing capability of bituminous materials at different crack phases as simulated with the direct tension test.

关键词： durability self healing cracking bituminous mastic elastic recovery flow

Performance Analysis of Cell Loss Probability Based on ATM self-healing Multi-section-backup VP Scheme

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High Technology Letters 2001年第4期7卷 54-57页

作者：陶立南 Jia Shilou Communications Research Center Harbin Institute of Technology

Based on ATM Multi section backup VP self healing scheme, analysis of cell loss probability under finite buffer is made by use of queue system method. Optimal buffer size can be fixed on.

关键词： Cell loss probability Multi section backup VP self healing

self-Healable and Stretchable PAAc/XG/Bi2Se0.3Te2.7 Hybrid Hydrogel Thermoelectric Materials

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Energy & Environmental Materials 2024年第2期7卷 184-190页

作者： Jinmeng Li Tian Xu Zheng Ma Wang Li Yongxin Qian Yang Tao Yinchao Wei Qinghui Jiang Yubo Luo Junyou Yang State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology

Thermoelectric power generators have attracted increasing interest in recent years owing to their great potential in wearable electronics power *** is noted that thermoelectric power generators are easy to damage in the dynamic service process,resulting in the formation of microcracks and performance ***,we prepare a new hybrid hydrogel thermoelectric material PAAc/XG/Bi2Se0.3Te2.7by an in situ polymerization method,which shows a high stretchable and self-healable performance,as well as a good thermoelectric *** the sample with Bi2Se0.3Te2.7content of 1.5 wt%(i.e.,PAAc/XG/Bi2Se0.3Te2.7（1.5 wt%）),which has a room temperature Seebeck coefficient of-0.45 mV K-1,and exhibits an opencircuit voltage of-17.91 mV and output power of 38.1 nW at a temperature difference of 40 *** being completely cut off,the hybrid thermoelectric hydrogel automatically recovers its electrical characteristics within a response time of 2.0 s,and the healed hydrogel remains more than 99% of its initial power *** stretchable and self-healable hybrid hydrogel thermoelectric materials show promising potential for application in dynamic service conditions,such as wearable electronics.

关键词： bismuth telluride self healing thermoelectric material

Physio-and chemo-dual crosslinking toward thermoand photo-response of azobenzene-containing liquid crystalline polyester

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Science China Materials 2018年第9期61卷 1225-1236页

作者： Hai-Yi Zhong Li Chen Xiao-Min Ding Rong Yang Yu-Zhong Wang Center for Degradable and Flame-Retardant Polymeric Materials College of ChemistryState Key Laboratory of Polymer Materials EngineeringNational Engineering Laboratory of Eco-Friendly Polymeric Materials（Sichuan）Sichuan UniversityChengdu 610064China College of Pharmacy Guangxi University of Chinese MedicineNanning 530299China School of Materials Science and Engineering Changzhou UniversityChangzhou 213000China

Combining the stability of chemical crosslinking and the processability of physical crosslinking is a well-established strategy to design new materials with desirable stimuli–responsive properties. Herein, a series of azobenzenebased thermotropic liquid crystalline polyesters were synthesized by introducing mesogenic dial named 4,4＇-bis（6-hydroxyhexyloxy）azobenzene（BHHAB）, 2-phenylsuccinic acid（PSA）, and different contents of 1,2,3-propanetricarboxylic acid（PTA） as the chemical crosslinker. All these polyesters showed good thermal stability and smectic liquid crystalline phase. Wide-angel X-ray diffraction（WAXD） and the fluorescence emission spectra confirmed the existence of π–πstacking interactions as the physical crosslinking in the polymer chains, particularly at the lower content of PTA. However, when the PTA content increased, the chemical crosslinking changed the chain conformation, and thus the intensity of physical crosslinking slackened gradually. Combining the physical and chemical crosslinking, these polyesters showed the thermoplastic processability, thermal shape memory, heat-assisted healing and photoresponsive behaviors. Taking advantages of these features, these multiple stimuli–responsive polymers can bring more chances for smart materials such as soft actuator.

关键词： liquid crystalline polymer crosslinking shape memory photo-response self healing