摘要
In this work fibers derived from coffee</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> hulls ha</span><span style="font-family:Verdana;">ve</span><span style="font-family:Verdana;"> been incorporated into Linear Low Density Polyethylene (LLDPE). The influence of the filler content on </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">thermal and physicomechanical properties of the composites obtained was assessed. The results showed that the incorporation of fibers was able to improve the thermostability of LLDPE/Coffee hulls fibers;comparing the treated fiber composite with untreated fiber composites, the chemical treatment reduces by 58.3% the water absorption, while increasing the elongation and tensile strength by about 48% and 17% respectively. Moreover, due to better interfacial interaction induced by MAPE, the corresponding composite exhibited better properties compared to the untreated fiber composite. Results are indicative of the fact that both mercerization and MAPE (coupling agent) have significant positive effects on the fib</span><span style="font-family:Verdana;">er</span><span style="font-family:Verdana;">-matrix interaction in terms of adhesion, wetting and dispersion, this treatment produced a better fiber distribution and consequently a more uniform composite morphology without voids and gaps between the fibers and the matrix, allowing the possibility to use higher fiber contents (up to 30% wt.) with acceptable mechanical properties.
In this work fibers derived from coffee</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> hulls ha</span><span style="font-family:Verdana;">ve</span><span style="font-family:Verdana;"> been incorporated into Linear Low Density Polyethylene (LLDPE). The influence of the filler content on </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">thermal and physicomechanical properties of the composites obtained was assessed. The results showed that the incorporation of fibers was able to improve the thermostability of LLDPE/Coffee hulls fibers;comparing the treated fiber composite with untreated fiber composites, the chemical treatment reduces by 58.3% the water absorption, while increasing the elongation and tensile strength by about 48% and 17% respectively. Moreover, due to better interfacial interaction induced by MAPE, the corresponding composite exhibited better properties compared to the untreated fiber composite. Results are indicative of the fact that both mercerization and MAPE (coupling agent) have significant positive effects on the fib</span><span style="font-family:Verdana;">er</span><span style="font-family:Verdana;">-matrix interaction in terms of adhesion, wetting and dispersion, this treatment produced a better fiber distribution and consequently a more uniform composite morphology without voids and gaps between the fibers and the matrix, allowing the possibility to use higher fiber contents (up to 30% wt.) with acceptable mechanical properties.
作者
Ahmat Tom
Abel Tame
Paul Nestor Djomou Djonga
Bakary Tigana Djonse Justin
Eugenie Géraldine Nga Abena
Ahmat Tom;Abel Tame;Paul Nestor Djomou Djonga;Bakary Tigana Djonse Justin;Eugenie Géraldine Nga Abena(Department of Energy Engineering, University Institute of Technology, University of Ngaoundere, Ngaoundere, Cameroon;Department of Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon;Department of Textile and Leather Engineering, National Advanced School of Engineering of Maroua, Maroua Cameroon;Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon;Department of Physics, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon)
