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Adsorption structure and adhesion strength of aqueous copolymer lubricant films on Si surface
Author(s) -
Lin Bingjing,
Tieu A. Kiet,
Zhu Hongtao,
Kosasih Buyung,
Novareza Oyong
Publication year - 2017
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1384
Subject(s) - copolymer , materials science , adsorption , adhesion , aqueous solution , chemical engineering , oxide , layer (electronics) , polypropylene , polymer chemistry , lubricant , composite material , chemistry , polymer , organic chemistry , engineering , metallurgy
The adsorption structure of aqueous triblock copolymer polypropylene oxide‐polyethylene oxide‐polypropylene oxide, PPO‐PEO‐PPO, on the Si surface was studied using neutron reflectometer. It is found that PEO blocks formed the outer layer of the adsorbed PPO‐PEO‐PPO film, while PPO blocks formed the inner layer and served as the anchor blocks. The adhesion strength of adsorbed PPO‐PEO‐PPO copolymer film was evaluated using atomic force microscopy and scratch tests. The results revealed that the molecular structure of triblock copolymer had a considerable effect on the adhesion strength. The triblock copolymer with a longer PPO chain and a higher weight percentage of PPO exhibited stronger adhesion and better lubrication performance.