| dc.description.abstract | Active carbon and silicon oil modified nanochitosan based-tribofilm materials was made
by using sol gel method with the variation of active carbon composition in the ratio of
40%wt:60%wt at the interval of 5%wt. The samples were made in two stages: in the first
stage, active carbon synthesis from oil palm shells was made by using 7% HaP04
activation and nanochitosan which came from shrimp shells by using ionic glassy
method. In the second stage, the mixture of active carbon tribofilm materials,
nanochitosan, and silicone oil was made by using sol gel method so that the film
establishing solution was then characterized to physical, chemical, mechanical, and
thermal establishment. The result of the characterization showed that the most optimum
composition was tribofilm materials of nanochitosan/silicone oil active carbon in Sl with
the mass ratio of 40%wt of active carbon produced density of 0.94 x 103 kg/mJ, viscosity
of 28.42 cP, and the tension of liquid surface of 63.5 mN/m. Meanwhile, the
characteristics of the performance on metal surface layers produced surface roughness of
0.162 gm for aluminum and 0.156 pm for copper. Scrape coefficient was 0.024, wear and
tear rate was 0.19 mm, thermal conductivity was 0.092 W/m.K, corrosion was I a (slight
ramish), corrosion rate was 2.34 mm/yr in the media of 3.5% NaCl, 4.33 mm/yr in the
media of sea water and 11.476 mm/yr in the media of 3% H2S04 and had good selfhealing
nature within three days on carbon steel surface with corrosive scrape treatment
in the media of 3.5% NaCl in which almost all scrapes/cracks were covered due to the
scrape power of galvanized corrosion with active carboxyl group, amine, and hydroxyl
with self-healing aminopropyl siloxane agent (NHrR-NH-Si-O-R) which reacted metal
ion particles (M-OH) in establishing polymer chainfor new network la | en_US |
