• 한국표면공학회지
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• 제44권6호
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• pp.246-249
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• 2011

Surface modification before coating nickel by coupling agents and/or etchant of glass did not provide enough adhesive strength of electroless nickel deposits on glass. Effect of heat treatments on hardness as well as adhesion of nickel deposits was studied by using tape test for adhesion, nanoindenter for hardness and glancing angle x-ray diffractometer (GAXRD) for phase characterization. Heat treatment improved hardness as well as adhesion. XRD results give that the improvements of adhesion and hardness are due to the formation of $NiSiO_4$ around the interface between the nickel deposits and the glass and the precipitation of $Ni_3P$ causing precipitation hardening, respectively. The details in effects of heat treatment on adhesion and hardness are described here.

• 접착 및 계면
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• 제14권3호
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• pp.111-116
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• 2013

본 연구에서는 신발에 사용되는 고무부품의 접착에 있어서 버핑 및 용매 세척 등의 표면처리 공정을 대체하기 위하여, 플라즈마 처리를 통한 표면 및 접착특성을 알아보았다. 플라즈마 처리 시 분사노즐과 고무 시편과의 거리가 감소할수록 접촉각은 감소하였으며, 플라즈마 처리속도가 증가함에따라 접촉각은 증가하였다. 고무 시편의 표면조도 측정결과 플라즈마 처리 후 Ra 값은 20%, Rz 값은 16%가 증가하는 결과를 나타내었다. 플라즈마 발생 노즐과 고무시편과의 거리가 증가함에 따라 접착력은 감소하고, 플라즈마 처리속도가 증가함에 따라 접착력은 감소하였다.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 1999년도 추계학술발표대회 논문집
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• pp.32-35
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• 1999

Poly(arylene ether phosphin oxide) (PEPO), Udel$^{\circledR}$ P-1700, Ultem$^{\circledR}$ 1000. poly(hydroxy ether) (PHE), carboxy modified poly(hydroxy ether)(C-PHE) and poly(hydroxy ether ethanol amine) (PHEA) were utilized for a coating of carbon fibers. Interfacial shear strength(IFSS) of polymers to carbon fibers was also evaluated in order to understand the adhesion mechanism. IFSS was measured via micro-droplet tests, and failure surfaces were analyzed by SEM. Diffusion between polymer and vinyl ester resin was investigated as a function of styrene content; 33. 40 or 50wt.% and the solubility parameters of polymers were calculated. The results were correlated to the interfacial shear strength. The highly enhanced interfacial shear strength (IFSS) was obtained with PEPO coating, and marginally improved IFSS with PHE, Udel$^{\circledR}$ and C-PHE coatings, but no improvement with PHEA and Ultem$^{\circledR}$ coatings.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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• pp.893-896
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• 2006

This study examined plant adhesion characteristics of the porous concrete that used specially treated granular fertilizer for field application, which was used for the restoration of the marine ecosystem. The results of the experiment showed that nutrient eruption amount, the destruction and dissolution ratio tended to decrease when the coating thickness was increased. The void ratio and compressive strength tended to decrease when the specially treated granular fertilizer mixing ratio was increased. According to these results, the appropriate thickness of coating for cement coated granular fertilizer was 1.0mm. The adhesion ability of marine plant to porous concrete was superior when the cement coated granular fertilizer was mixed. Therefore, the appropriate cement coated granular fertilizer mixing ratio of 20% with a coating thickness of 1.0mm is thought to be a factor when considering the strength of the porous concrete for marine ecosystem restoration and the adhesion characteristics of marine plant.

• 접착 및 계면
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• 제15권3호
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• pp.109-115
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• 2014

본 연구에서는 내부에 이소시아네이트를 포함하는 microcapsule을 합성하였으며, 제조된 microcapsule에 대한 분석 및 폴리우레탄 수지와 병용했을 때의 기계적 물성과 접착특성에 대해서 고찰하였다. 전자현미경을 사용해서 합성된 microcapsule이 구형의 외관을 갖는 것을 확인하였으며, FT-IR과 TGA 분석을 통해서 microcapsule의 core 물질이 IPDI인 것과 각 구성요소들의 성분비를 확인하였다. 폴리우레탄 수지 자체 및 microcapsule을 포함한 경우의 접착력 및 물성을 평가한 결과 접착수지 내에 포함된 microcapsule 내 IPDI의 가교반응에 의해서 폴리우레탄 수지 자체에 비해 접착력, 인장강도, 내마모 특성이 크게 향상되는 것을 확인하였다.

• 한국표면공학회지
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• 제56권1호
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• pp.77-83
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• 2023

The reliability of leadframe-based semiconductor package depends on the adhesion between metal and epoxy molding compound (EMC). In this study, the Ag surface was electrochemically treated in a solution containing silanes in order to improve the adhesion between Ag and epoxy substrate. After electrochemical treatment, the thin silane layer was deposited on the Ag surface, whereby the peel strength between Ag and epoxy substrate was clearly improved. The improvement of peel strength depended on the functional group of silane, implying the chemical linkage between Ag and epoxy.

• 한국표면공학회지
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• 제33권4호
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• pp.241-250
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• 2000

Popcorn cracking phenomena frequently occur in thin plastic packages during the solder reflow process, which are definitely affected by poor adhesion of Cu-based leadframe to epoxy molding compounds (EMCs). In the present work, in order to enhance the adhesion strength, a brown-oxide treatment on the Cu-based leadframe was carried out and the adhesion strength of leadframe/EMC interface was measured in terms of fracture toughness by using sandwiched double-cantilever beam (SDCB) specimens. After the adhesion tests, fracture surfaces were analyzed by SEM, AES, EDS and AFM to make the failure path clear. Results showed that failure path was closely related to the oxidation time and the interfacial fracture toughness.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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• pp.349-354
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• 2002

Significant improvements in bond strength between new and existing concrete can be achieved through the modification of the new concrete by latex modification. But, no test method has been adopted as a standard to measure the bond strength between the concrete used to repair and the substrate being repaired. The performance of old and the new concrete construction depends upon bond strength between old and the new concrete. Current adhesion strength measurement method ignores the effect of stress concentration by shape of specimens. Therefore, this research calculates stress concentration coefficient using finite element analysis and direction tensile strength test (pull-off test). The result shows that the required core depth is 2.5cm. Elastic modulus and overlay thickness do not influence in stress concentration.

• 산업기술연구
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• 제21권B호
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• pp.295-300
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• 2001

Significant improvements in bond strength between new and existing concrete can be achieved through the modification of the new concrete by latex modification. But, no test method has been adopted as a standard to measure the bond strength between the concrete used to repair and the substrate being repaired. The performance of old and the new concrete construction defends upon band strength between old and the new concrete. Current adhesion strength measurement method is inaccurate method that ignore effect of stress concentration by shape of specimens. Therefore, this research calculates stress concentration coefficient using finite element analysis and direction tensile strength test (pull-off test). The result shows that the required core depth is 2.5 cm. Elastic modulus and overlay thickness do not influence in stress concentration.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2010년도 춘계 학술대회 제22권1호
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• pp.325-326
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• 2010

최근 타일접착제 시장이 성장함에 따라 이에 관한 국제규정인 ISO 13007이 제정 되었으며, 세계 각국에서 동(同)규정의 전면적 혹은 부분적 수용을 통한 자국규정의 개정활동이 활발히 이루어지고 있다. 국내에서도 타일접착제 관련 KS규정의 국제규정 부합화에 대한 필요성이 대두되고 있다. 본 연구에서는 타일접착제 국제규정의 국내 도입을 앞두고 타일시멘트의 중요한 성능지표인 접착강도에 미치는 하지 종류의 영향을 검토함으로써 국제규준에 적합한 접착하지의 확보방안을 제안하고자 하였다.