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Sawdust based composites
Author(s) -
Mukbaniani Omar,
Brostow Witold,
Aneli Jimsher,
Markarashvili Eliza,
Tatrishvili Tamara,
Buzaladze George,
Parulava Gorge
Publication year - 2020
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4965
Subject(s) - sawdust , materials science , absorption of water , composite material , composite number , viscosity , pressing , hot pressing , polymer , pulp and paper industry , engineering
Much sawdust is treated as waste and deposited in landfills; with time, the city landfills have to be made larger and larger and/or deeper and deeper. We have created composites on the basis of dry sawdust and only 3 wt% to 15 wt% of phenylethoxysiloxane binders of two kinds under pressures up to 15 MPa and temperatures up to 220°C. Hot pressing of one of the composites containing 3 wt% of one of the polymeric binders at 110°C provides the impact viscosity = 12 kJ/m 2 while the pressing at 200°C results in the value of that viscosity = 30 kJ/m 2 . Another option is using 5 wt% of the same polymer at 110°C what gives the impact viscosity = 20 kJ/m 2 . Water absorption after 24 hours exposition in water for 15 wt% of the same polymer amounts to 55.5 wt% when the composite is prepared at 130°C but only 2.9% for the composite made at 170°C. Given low‐to‐negligible prices of sawdust, composites with useful properties and low prices can be made from it—along with mitigation of waste creation.