Title:
Tailored Functionalization of Waste Hardwood Lignocelluloses For Making Recycled Polymer-Based Composites
Author(s):
Shulga, G., Neiberte, B., Matvejs, J., Uzulis, S., Verovkins, A., Vitolina, S., Jaunslavietis, J., Brovkina, J., Livcha, S.
Document(s):
Paper
Abstract:
The work aimed to obtain a new lignocellulosic filler with enhanced adhesion to recycled polypropylene for making wood-polymer composites (WPCs) by purposeful chemical functionalisation of the fine birch wood sawdust formed as a result of the mechanical processing of plywood at the JSC “Latvijas Finieris”. The functionalisation comprised the treatment of wood sawdust by alkaline hydrolysis with low concentrations of alkali at low temperatures (< 100oC), followed by its amination with epoxy amine. The effect of the alkaline hydrolysis parameters (NaOH concentration and applied temperature) on the chemical composition, yield and content of microparticles < 100 µm, and on the Z potential of the obtained microparticles was studied. For obtaining the functionalised filler, the sawdust microparticles, obtained with 0.5% NaOH at 60oC, and diethylepoxypropylamine (DEEPA) were mixed at 98°C for 1 h. As a result, amino derivatives of lignocelluloses, containing 2-hydroxy-3-diethylamine-propoxy groups, were obtained. Microparticles with a nitrogen content of 1.6 and 3.4% were used as a filler. Comparison of the mechanical properties (tensile, bending) of the composites filled with initial sawdust and aminated hydrolysed microparticles showed a pronounced improvement in their mechanical properties and a decrease in their water sorption and swelling degree, which were dependent on the introduced nitrogen amount.
Keywords:
amination, birch wood sawdust, low temperature alkaline hydrolysis, recycled polypropylene, WPC
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Production and application of biobased chemicals
Event:
25th European Biomass Conference and Exhibition
Session:
3BV.4.39
Pages:
1329 - 1334
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3BV.4.39
Price:
FREE
