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A MODEL FOR COMPUTATIONAL INVESTIGATION OF ELASTO-PLASTIC NORMAL AND TANGENTIAL CONTACT CONSIDERING adhesion EFFECT

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Acta Mechanica Sinica 2004年第2期20卷 165-171页

作者：李群仰余寿文 Key lab.of Failure Mechanics MoEDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084China

With the rapid development of Micro-Electro-Mechanical System(MEMS),we enter a field in which the surface effects have dominated many of the micro-scale phenomena,and the adhesive contact is one of the *** this paper,a feasible model for finite element computation is presented via a macroscopic and microscopic combination approach,in which the adhesive forces are simulated by some non-linear spring elements considering the softening *** basic problems concerning the adhesion effect were considered;through specific quantitative analysis,the results show a consistency with the current elastic continuum theories of adhesion and a brief investigation into the effects of adhesion on plastic deformation and tangential contact will be carried out as well.

关键词： adhesion adhesive force contact tangential contact

adhesion Performances of SIS/SBS Based UV-Curable Pressure Sensitive Adhesives Using Thiol-ene Reaction

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Adhesion Performances of SIS/SBS Based UV-Curable Pressure S...

第三届世界粘接及相关现象大会暨北京粘接学会第十五届学术年会

作者： Dong-Hyuk Lim Hyun-Sung Do Young-Jun Park Hyun-Joong Kim Jung-Suk Bang Goan-Hee Yoon lab.of adhesion and bio-composites Major in Environmental Materials ScienceSeoul 151-921S.Korea Vixxol Co. Inc.AnsanKyonggidoS.Korea

Synthetic rubber based pressure-sensitive adhesives(PSAs) usually containing SIS or SBS block copolymer, tackifier,plasticizer,and other additives are now widely used on various *** these PSAs are physically crosslinked and can be applied without the use of solvent,they are thermally processable and environmentally friendly. However these PSAs cannot be used in high temperature applications and in applications where solvent and chemical resistance properties are *** developed the PSA adding UV curable system,such as thiol-ene system,to increase adhesion properties at elevated *** adhesion properties such as probe tack,peel strength,shear adhesion failure temperature(SAFT) were *** probe tack test was conducted with varying probe materials and coating thickness of *** the contact angle,the surface property of the cured PSAs was also observed.

关键词： UV curing hotmelt PSA photoinitiator photocrosslinker thiol-ene reaction

Measurements of Formaldehyde and TVOC Emission from Paints and Coating Materials using Small Chamber Method for Building composites

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 120-125页

作者： Jin-A KIM Sumin KIM Hyun-Joong KIM Janghoo SEO National Instrumentation Center for Environmental Management Seoul National University Seoul 151-921 Republic of Korea laboratory of adhesion & bio-composites Program in Environmental Materials Science Seoul National University Seoul 151-921 Republic of Korea Building Environment & Materials lab School of Architecture Soongsil University Seoul 156-743 Republic of Korea School of Architecture Chosun University Gwangju 507-759 Korea

An optimal test method for paint is proposed; additionally, the Field and laboratory Emission Cell （FLEC） method used in Europe is applied as a substitute for the 20 L small chamber method. The emission factors of total volatile organic compounds （TVOC） and formaldehyde from oil-based paint, emulsion paint, and water-dispersion paint with a coating weight of 300 g/m2, cured for 24/48 hours, were measured using the 20 L small chamber method. The emission rate of TVOC and formaldehyde from all paints began to stabilize after approximately 7 days after 24/48 hours of curing even though Korean standards stipulate that paint should be measured and analyzed after the third day of application. The emission factor of TVOC and formaldehyde from oil-based, emulsion, and water-dispersion paints were also measured using the FLEC method. There was good correlation between the 20 L small chamber method and the FLEC method for oil-based, emulsion, and water-dispersion paint emissions. With the FLEC method, using paints prepared under identical conditions, the emission rate was stable 24 hours after installation of samples because the air flow rate of FLEC is much higher than that of a 20 L small chamber, and the relative cell volume of FLEC is much smaller than that of a 20 L small chamber.

关键词： formaldehyde TVOC paints coating materials FLEC

汽车底涂用聚酯涂料的固化及其表面性能(英文)

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汽车底涂用聚酯涂料的固化及其表面性能(英文)

'2010北京国际粘接技术研讨会

作者： PARK cho-hee HWANG hyeon-deuk MOON je-ik KIM hyun-joong NOH seung man NAM joon hyun lab.of adhesion and bio-composites Program in Environmental Materials ScienceSeoul National UniversitySeoul 151-921S.Korea

＜正＞*** Various physical properties are required for automotive *** fulfilling these properties, automotive coatings are made up multi-layers hence coating system is very *** automotive coating process is consisted of electro-deposition,primer,base coat,and clear coat. Car body forming,welding,assembling and phosphate pretreatment are accomplished in order

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Highly adaptive triboelectric tactile sensor on the foot of autonomous wall-climbing robots for detecting the adhesion state and avoiding the hazard

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Nano Research 2024年第7期17卷 6518-6526页

作者： Zhaoyang Wang Jianhua Liu Ziyu Wang Chang Liu Qingyu Chen Chaofan Zhang Wenbo Zhang Jicang Si Xiu Xiao Peng Xu Minyi Xu Dalian Key lab.of Marine Micro/Nano Energy and Self-powered System Marine Engineering CollegeDalian Maritime UniversityDalian 116026China Information Science and Technology College Dalian Maritime UniversityDalian 116026China Navigation College Dalian Maritime UniversityDalian 116026China Intelligent biomimetic Design lab College of EngineeringPeking UniversityBeijing 100871China

Due to the excellent maneuverability and obstacle crossing of legged robots,it is possible for an autonomous legged wallclimbing robots to replace manual inspection of ship exterior ***,when the magnetic adsorption legged wallclimbing robot steps on the convex point or convex line of the wall,or even when the robot missteps,the robot is likely to detach from the ferromagnetic ***,this paper proposes a tactile sensor for the legged magnetic adsorption wall-climbing robot to detect the magnetic adsorption state and improve the safety of the autonomous crawling of the *** tactile sensor mainly comprises a three-dimensional(3D)-printed shell,a tactile slider,and three isometric sensing units,with an optimized *** experiment shows that the triboelectric tactile sensor can monitor the sliding depth of the tactile slider and control the light-emitting device(LED)signal *** addition,in the demonstration experiment of detecting the adsorption state of the robot's foot,the triboelectric tactile sensor has strong adaptability to various ferromagnetic wall ***,this study establishes a robot gait control system to verify the feedback control ability of the triboelectric tactile *** results show that the robot equipped with the triboelectric tactile sensor can recognize the dangerous area on the crawling wall and autonomously avoid the ***,the proposed triboelectric tactile sensor has great potential in realizing the tactile sensing ability of robots and enhancing the safety and intelligent inspection of ultra-large vessels.

关键词： legged wall-climbing robot ship inspection tactile perception triboelectric sensor

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丙烯酸酯压敏胶的紫外光固化研究(英文)

丙烯酸酯压敏胶的紫外光固化研究(英文)

'2010北京国际粘接技术研讨会

作者： LEE yong-ju PARK ji-won KIM hyun-joong lab.of adhesion ＆ bio-composites Program in Environmental Materials ScienceSeoul National UniversitySeoul 151-921S.Korea

＜正＞*** Pressure-sensitive adhesives（PSAs） are viscoelastic materials which adhere to substrates on the application of slight pressure over short periods of *** term"pressure sensitive"（or sometimes self-adhesive） is used to designate a distinct category of *** are used for many *** are used for masking tapes,medical tape,labels,and packaging[1,2].

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Versatile Organogels of Aluminum Oxide Subnanosheets for Locking Solvents and adhesion

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Precision Chemistry 2024年第1期2卷 21-27页

作者： Wanyue Ouyang Xun Wang Key lab.of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China

Herein,we present a facile strategy to prepare versatile aluminum oxide subnanometer nanosheets with oleic acid and stearic acid ligands(OA-Al SNSs and SA-Al SNSs,respectively).The size effect endows subnanosheets with abundant acting sites,remarkable intermolecular interactions,and unique polymer-like properties,including flexibility,viscoelasticity,and sol-gel transitions,which is quite different from traditional inorganic ***,subnanosheets could form freestanding organogels and OA-Al SNSs exhibit satisfying semisolidification of various solvents,making it an intriguing candidate for the safe storage and transportation of ***,SA-Al SNSs exhibit excellent adhesive properties of high strength on diverse substrates,and it is easy to erase it without any damage,demonstrating the promising prospects in practical applications.

关键词： subnanometer nanomaterials self-assembly polymer-analogue organogel adhesive

Wettability regulated gram-negative bacterial adhesion on biomimetic hierarchical structures

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Chinese Chemical Letters 2017年第4期28卷 813-817页

作者： You Jiang Yi-Jie Yin Xin-Cheng Zha Xiao-Qiu Dou Chuan-Liang Feng State Key lab.of Metal Matrix composites School of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

One of the critical issues in gram-negative bacterial adhesion is how wettability regulates adhesion as the surface wettability varies from superhydrophilic to superhydrophobic,and what is the relevant/contributing role of the lipopolysaccharide（LPS） outer layer of the gram-negative shell during this ***,by avoiding the unexpected influence induced by the varied topographies,control over gram-negative bacteria adhesion by wettability is achieved on biomimetic hierarchical surfaces,which is mainly mediated by LPS *** study provides a methodology to have a good control over bacteria cell adhesion by properly designing wettable surface *** design concept is helpful for developing new generations of biomaterials in order to control a variety of diseases induced by gramnegative bacteria,which still continue to be very important and necessary in the fields of biomedicine.

关键词： Wettability Gelator Self-assembly Hierarchical structures Bacteria adhesion

Preparation and characterization of biodegradable aliphatic-aromatic copolyesters/nano-SiO_2 hybrids via in situ melt polycondensation

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Chinese Chemical Letters 2009年第11期20卷 1348-1352页

作者： Yan Zhang Bing Tao Wang Zheng Hong Guo Jie Chen Zheng Ping Fang lab.of Polymer Materials and Engineering Ningbo Institute of Technology Zhejiang University Ningbo 315100 China Institute of Polymer composites Zhejiang University Hangzhou 310027 China

In situ melt polycondensation was proposed to prepare biodegradable aliphatic-aromatic copolyesters/nano-SiO2 hybrids based on terephthalic acid （TPA）, poly（L-lactic acid） oligomer （OLLA）, 1,4-butanediol （BDO） and nano-SiO2. TEM and FT-IR characterizations confirmed that TPA, OLLA and BDO copolymerized to obtain biodegradable copolyesters, poly（butylene terepbthalate-co-lactate）（PBTL）, and the abundant hydroxyl groups on the surface of nano-SiO2 provided potential sites for in situ grafting with the simultaneous resulted PBTL. The nano-SiO2 particles were chemically wrapped with PBTL to form PBTL/nano- SiO2 hybrids. Due to the good dispersion and interfacial adhesion of nano-SiO2 particles with the copolyester matrix, the tensile strength and the Young＇s modulus increased from 5.4 and 5.6 MPa for neat PBTL to 16 and 390 MPa for PBTL/nano-SiO2 hybrids with 5 wt.% nano-SiO2, respectively. The mechanical properties of PBTL/nano-SiO2 hybrids were substantially improved.

关键词： biodegradable aliphatic-aromatic copolyesters PBTL/nano-SiO2 hybrids In situ melt polycondensation