Molecular dynamics and molecular design of a polyelectrolyte brush with low fictional property

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560894
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Material processing/treatments
• Research Institution: Tokyo City University
• Principal Investigator: FUJIMA Takuya 東京都市大学, 工学部, 准教授 (40392097)
• Research Collaborator: FUTAKUCHI Eitaro ; SHIRAISHI Yoshihiro ; TAKAHASHI Shin-nosuke ; MURAI Shota ; SHIMAZAKI Masahiro
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ナノ摩擦 / 高分子電解質ブラシ / 走査型プローブ顕微鏡

Outline of Final Research Achievements

In this work, we investigated frictional properties of a polyelectrolyte, NaPSS, brush in water that is strongly stretched away from its substrate by using SPM in order to elucidate the molecular mechanism of its low frictional properties. The friction force was proportional to sliding distance under small displacement conditions. A larger sliding intensity resulted in smaller and displacement-independent frictional force. This properties indicated physical adsorption between the stretched polymer chains and the rubbing object, kantilever tip, that makes the detected frictional force from lateral elasticity of the polymers in the former conditions and their desorption force from the sliding object in the latter.

Free Research Field

物理化学