Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 555, Issue -, Pages 296-303Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2018.06.065
Keywords
Action mechanism; Ethylene vinyl acetate; Flow properties; Nanocomposite pour point depressant; Wax crystal
Categories
Funding
- National Natural Science Foundation of China [51534004, U1362110]
- Northeast Petroleum University [JYCX_CX03_2018]
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A series of novel nano-hybrid pour-point depressants (PPDs) which combined nano-montmorillonite (MMT) and ethylene vinyl acetate (EVA) copolymers were prepared. Compared with pure EVA PPDs with identical content, the effects of EVA/nano-MMT PPDs on the cold flow properties of 25 wt% wax model oil were evaluated. Polarized optical microscopy was used to study the effect of the EVA/nano-MMT PPDs on the crystallization behavior and crystal morphology of the model oil at low temperature. The results indicated that the vinyl acetate content of EVAs has a significant impact on the performance of EVA/nano-MMT PPDs, and appropriate dosage of the EVA/nano-MMT PPDs can be more effective than EVA PPDs in modifying the wax crystal morphology, preventing their aggregation and improving the fluidity of model oil at low temperatures.
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