【公開日：2024.07.25】【最終更新日：2024.06.29】
課題データ / Project Data
課題番号 / Project Issue Number
23UT0266
利用課題名 / Title
Generation of metal surface nanostructures for promoting hybrid metal/polymer joining
利用した実施機関 / Support Institute
東京大学 / Tokyo Univ.
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）マルチマテリアル化技術・次世代高分子マテリアル/Multi-material technologies / Next-generation high-molecular materials（副 / Sub）マテリアルの高度循環のための技術/Advanced materials recycling technologies
キーワード / Keywords
電子顕微鏡/ Electronic microscope,資源使用量低減技術/ Technologies for reducing resource usage,異種材料接着・接合技術/ Dissimilar material adhesion/bonding technology
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
任 家興
所属名 / Affiliation
東京大学 大学院工学系研究科
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
Recently, metal-plastic hybrid joining technology is becoming very attractive in the automotive industry because it contributes to structural light-weighting and decarbonization of society. Surface pretreatment is necessary for metals and plastics with obviously different properties to promote hybrid joining. Galvanized high-strength steel (GHSS) has been widely used in the car body because of its excellent anti-corrosion properties and mechanical performance. Hot water treatment (HWT) is a simple and eco-friendly process that generates nanostructures and changes the chemical condition of the metal surface.This study explored the effects of HWT at different pH and temperatures on the GHSS surface condition. Zinc oxides and hydroxides with different amounts were generated on the surface to promote surface anchoring effects and hydrogen bonding. In conclusion, the anchoring effect produced by the oxide needle-like structures is considered a major factor in promoting joining. High-ph environments were found to inhibit the full growth of oxide needle-like structures.
実験 / Experimental
GHSS is immersed in high-temperature water for a certain period to generate the needle-like nanostructure on the surface. NaOH was used for pH adjustment to adjust the OH- concentration in the water. Galvanized SPFC780 was chosen as the metal material. The polymer material is the polybutylene terephthalate (PBT). An injection molding machine was used to fabricate samples. The treated metal surfaces and crosssection of the joint were observed via the SEM/EDS (JSM-7800F-PRIME).
結果と考察 / Results and Discussion
1. Through the observation and EDS analysis of galvanized steel surfaces after different hot water treatments, it was found that the growth morphology of nanostructures varied according to the hot water treatment conditions.2. By analyzing the joint cross-section of metal-plastic injection molded direct joining parts, it was found that the nanostructures on the resin and metal surfaces formed a good mechanical interlocking.
図・表・数式 / Figures, Tables and Equations
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件