The effects of carbonized Eucalyptus globulus leaves on castor seed oil based urethane coating system

[Display omitted] •Carbon Nano Particles (CNP) prepared from the leaves of Eucalyptus globulus.•The functionalized CNPs are used in castor based PU coatings.•The CNPs and PU coatings were characterized.•The synthesized PU-CNP coatings shows the improved properties. The usability of nanomaterials in...

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Bibliographic Details
Published in:Progress in organic coatings 2019-06, Vol.131, p.42-48
Main Authors: Siyanbola, T.O., Neelambaram, P., Mohanty, S., Somisetti, V., Basak, P., Narayan, Ramanuj, Kothapalli, Raju V.S.N.
Format: Article
Language:English
Subjects:
Anticorrosion
Ashes
Carbon
Castor seed
Corrosion prevention
Eucalyptus
Eucalyptus globulus
High aspect ratio
Hydrophobicity
Infrared analysis
Molecular structure
Nanomaterials
Nanorods
Physical properties
Polymer matrix composites
Polyurethane resins
Polyurethanes
Scanning electron microscopy
Thermogravimetric analysis
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Summary:[Display omitted] •Carbon Nano Particles (CNP) prepared from the leaves of Eucalyptus globulus.•The functionalized CNPs are used in castor based PU coatings.•The CNPs and PU coatings were characterized.•The synthesized PU-CNP coatings shows the improved properties. The usability of nanomaterials in various research endeavour has been on the front. burner in the past few decades. This is due to its high aspect ratio and steep electrical, molecular defined structure, mechanical and physical properties. This present study reports the synthesis of carbon nanomaterials (CNM) from Eucalyptus globulus leaves. Fresh green leaves of Eucalyptus globulus were collected and dried under the sun. The dried brown leaves were later incinerated completely under atmospheric oxygen. Obtained ashes were treated with acid piranha solution in other to modify the peripheral of the ashes with carboxyl groups (CNM-COOH). Scanning electron microscopy image divulges the presence of carbon nanorods in the ash. CNM-COOH materials in percentages were then incorporated within the polyurethane polymer matrix of which Castor seed oil (Ricinus communis) and trimethylopropane (TMP) provided the hydroxyl base for urethanation. Infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis was used to confirm material modification. Synthesized urethane composites of CNM-COOH material shows improved thermal, mechanical, hydrophobicity and anticorrosion properties when compared with that of pristine polyurethane (PU).
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2019.02.018