2.2. Processing of composite materials
In the present work, a method based on production of master batches with high concentration of cellulose nanofibrils suspension in PHB matrix was first proposed as a way to overcome poor adhesion and attain melt compounded nanocomposites with high levels of CNF dispersion. The CNF suspension was mixed with PHB at CNF contents of 12.5, 25, and 50 wt.% using a Brabender Prep-mixer® equipped with a bowl mixer at 170 ◦C and rotor speed at 60 rpm. After processing, the CNF–PHB mixture was cooled and cut into small particles to be premixed with the PLA matrix. These small
particles were then used to produce PLA nanocomposites by meltmixing with PLA pellets to obtain nanocomposites containing 1.25,2.5, and 5 wt.% CNF (sample codes: C-1.25-CNF, C-2.5-CNF and C-5-CNF) in Table 1. Additionally, a reference composite was prepared by melt mixing PLA with only 10 wt.% CNF (sample code: 10-CNF) for the purpose of differentiating the effects caused by PHB and
2.2. Processing of composite materialsIn the present work, a method based on production of master batches with high concentration of cellulose nanofibrils suspension in PHB matrix was first proposed as a way to overcome poor adhesion and attain melt compounded nanocomposites with high levels of CNF dispersion. The CNF suspension was mixed with PHB at CNF contents of 12.5, 25, and 50 wt.% using a Brabender Prep-mixer® equipped with a bowl mixer at 170 ◦C and rotor speed at 60 rpm. After processing, the CNF–PHB mixture was cooled and cut into small particles to be premixed with the PLA matrix. These smallparticles were then used to produce PLA nanocomposites by meltmixing with PLA pellets to obtain nanocomposites containing 1.25,2.5, and 5 wt.% CNF (sample codes: C-1.25-CNF, C-2.5-CNF and C-5-CNF) in Table 1. Additionally, a reference composite was prepared by melt mixing PLA with only 10 wt.% CNF (sample code: 10-CNF) for the purpose of differentiating the effects caused by PHB and
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