• Title/Summary/Keyword: Adhesion Measurement

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Measurement of Adhesion (접착력의 측정)

  • Kim, Sung-Ryong;Lee, Ho-Young
    • Journal of Adhesion and Interface
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    • v.4 no.3
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    • pp.21-32
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    • 2003
  • Various methods for adhesion measurement, which are related to previously published paper [J. of Soc. of Adhe. and Inter, 3,4 (2002)], are reviewed. At first, the prerequisite for the ideal adhesion strength measurement is considered, and three categories of methods for adhesion measurement, such as mechanical, non-mechanical methods and miscellaneous methods, are introduced.

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Adhesion Strength Measurement of Rabbit Knee Chondrocyte (연골세포 부착력 평가)

  • Lee Kwon-Yong;Park Sang-Guk;Shin Daehwan;Park Jong-Chul
    • Tribology and Lubricants
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    • v.21 no.5
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    • pp.236-240
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    • 2005
  • In order to prepare for the suitable surfaces of implants or medical devices, quantitative evaluation of adhesion between cells and biomaterials is essential. To better understand adhesion formation between cells and biomaterials, we used the cytodetachment technique which measures the adhesive force of a single cell through changing the, culture time and detachment speed. The results showed that the adhesive force could be affected by the culture time of cells on the surface of materials and the detachment speed. Moreover, there was a large discrepancy among the adhesion strength measured by similar techniques conducted on the different cells and substrates. It can be 'concluded that the variation of the force measurement technique can seriously alter the level of the force required to detach a cell on the surface of materials.

Development of Adhesion Force Measurement Apparatus with High Stiffness and High Resolution (고탄성 고분해능을 갖는 응착력 측정장치의 개발)

  • Kim, Gyu-Sung;Yoon, Jun-Ho
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.3 s.192
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    • pp.140-146
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    • 2007
  • To understand adhesive phenomena, we need to get force curve between two surfaces. And it is said that high stiffness force analysis system is needed to get precise force curve and more information of the surfaces. Usually the stiffness of the force measurement system is under the order of 10N/m. The stiffer force measurement system, however, results in more information on the surface, because higher stiffness lead to the wider range of force curves, secondly because the force curve obtained through the stiffer one describes more precise relationship between relative tip-sample separation and interaction force. In this paper, considering for stiffness and resolution, the cantilever was designed and we made adhesion force measurement apparatus with high stiffness and high resolution, so we measured adhesive force between Ag-ball and wafer.

Measurement of Surface Energy and Intrinsic Work of Adhesion Using Johnson-Kendall-Roberts (JKR) Technique (Johnson-Kendall-Roberts (JKR) 기법을 이용한 표면 에너지 및 고유접착에너지 측정)

  • Lee, Dae Ho;Lee, Dong Yun;Cho, Kilwon
    • Journal of Adhesion and Interface
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    • v.5 no.3
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    • pp.18-22
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    • 2004
  • By using JKR technique, the surface energy of a solid material and the intrinsic work of adhesion between two materials were determined. JKR technique is based on the contact mechanics, and is now being accepted as a new method which can overcome the demerits of the existing test methods such as contact angle measurement and other adhesion test. In this study, the surface energy of polydimethylsiloxane (PDMS) is measured by JKR method and the experimental results and the applicability of JKR apparatus were discussed.

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Adhesion of clay to metal surface; Normal and tangential measurement

  • Basmenj, Amir Khabbazi;Ghafoori, Mohammad;Cheshomi, Akbar;Azandariani, Younes Karami
    • Geomechanics and Engineering
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    • v.10 no.2
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    • pp.125-135
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    • 2016
  • Adhesion in geotechnical engineering is the interaction between cohesive soil and a solid surface which can cause clogging in mechanized tunnelling through clayey formations. Normal piston pull out and modified direct shear tests were performed on clayey soil samples to determine which type of adhesion stress, normal or tangential, could be most effectively measured. Measured values for normal adhesion ranged from 0.9 to 18 kPa. The range of tangential adhesion was 2.4 to 10 kPa. The results indicate normal adhesion results were more accurate than those for the modified direct shear test that measure tangential adhesion. Direct shear test on identical samples did not show any correlation between measured cohesion and normal adhesion values. Normal adhesion values have shown significantly meaningful variation with consistency index and so are compatible with the base of field clogging assessment criteria. But tangential adhesion and cohesion were not compatible with these assessment criteria.

A Study on the Quality Characteristics of Leather Shoe Adhesives(I) -Ladies' Leather-shoe- (구두용 접착제의 품질 특성에 관한 연구(I) -여성 가죽구두-)

  • 서교택;이상신
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.23 no.54
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    • pp.137-144
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    • 2000
  • The chloroprene adhesive for ladies' shoe-making applied by the cementing method in KS G 3116 has been evaluated.. For the quality test of adhesive for pump whole cut vamp using chloroprene adhesive, general property and adhesion strength were measured and duration for environmental exposure was tested. Also, a list of experiments for field application was prepared. In case of adhesion-strength measurement,, the KS G 3116 method of peel strength at end of toe was found to be reasonable by measurement through a whole length, toe to heel seat on feather edge.

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Comparison of Quantitative Interfacial Adhesion Energy Measurement Method between Copper RDL and WPR Dielectric Interface for FOWLP Applications (FOWLP 적용을 위한 Cu 재배선과 WPR 절연층 계면의 정량적 계면접착에너지 측정방법 비교 평가)

  • Kim, Gahui;Lee, Jina;Park, Se-hoon;Kang, Sumin;Kim, Taek-Soo;Park, Young-Bae
    • Journal of the Microelectronics and Packaging Society
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    • v.25 no.2
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    • pp.41-48
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    • 2018
  • The quantitative interfacial adhesion energy measurement method of copper redistribution layer and WPR dielectric interface were investigated using $90^{\circ}$ peel test, 4-point bending test, double cantilever beam (DCB) measurement for FOWLP Applications. Measured interfacial adhesion energy values of all three methods were higher than $5J/m^2$, which is considered as a minimum criterion for reliable Cu/low-k integration with CMP processes without delamination. Measured energy values increase with increasing phase angle, that is, in order of DCB, 4-point bending test, and $90^{\circ}$ peel test due to increasing roughness-related shielding and plastic energy dissipation effects, which match well interfacial fracture mechanics theory. Considering adhesion specimen preparation process, phase angle, measurement accuracy and bonding energy levels, both DCB and 4-point bending test methods are recommended for quantitative adhesion energy measurement of RDL interface depending on the real application situations.