TY - JOUR
T1 - Micro- and nano-celluloses derived from hemp stalks and their effect as polymer reinforcing materials
AU - Kassab, Zineb
AU - Abdellaoui, Youness
AU - Salim, Mohamed Hamid
AU - Bouhfid, Rachid
AU - Qaiss, Abou El Kacem
AU - El Achaby, Mounir
N1 - Funding Information:
The financial assistance of the Materials Science and nanoengineering (MSN) Department of the Mohammed VI Polytechnic University (UM6P) , toward this research, is hereby acknowledged.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10/1
Y1 - 2020/10/1
N2 - Fiber-reinforced polymers have emerged as one of the most popular methods to improve the polymers’ characteristics owing to their prominent properties. This study aimed to investigate the properties of cellulose microfibers (CMF), cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) extracted from hemp stalks, then their effect as reinforcement for the PVA-polymer. CMF have been extracted from hemp stalks with a diameter and yield of 16.96 μm and 63 %, respectively. Needle-shaped CNC were obtained from CMF using sulfuric acid hydrolysis at two hydrolysis times, while CNF exhibited a web-like structure obtained using TEMPO-oxidation followed by mechanical treatment. Cellulose derivatives were utilized to develop cellulose-based PVA composites; their transparency, chemical structure, thermal stability and mechanical properties were investigated. The incorporation of nanocellulose demonstrated a significant increase in mechanical properties compared to the neat PVA. The extracted nanocellulose could be used as nanofillers for the preparation of transparent and mechanically strong PVA-based nanocomposites.
AB - Fiber-reinforced polymers have emerged as one of the most popular methods to improve the polymers’ characteristics owing to their prominent properties. This study aimed to investigate the properties of cellulose microfibers (CMF), cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) extracted from hemp stalks, then their effect as reinforcement for the PVA-polymer. CMF have been extracted from hemp stalks with a diameter and yield of 16.96 μm and 63 %, respectively. Needle-shaped CNC were obtained from CMF using sulfuric acid hydrolysis at two hydrolysis times, while CNF exhibited a web-like structure obtained using TEMPO-oxidation followed by mechanical treatment. Cellulose derivatives were utilized to develop cellulose-based PVA composites; their transparency, chemical structure, thermal stability and mechanical properties were investigated. The incorporation of nanocellulose demonstrated a significant increase in mechanical properties compared to the neat PVA. The extracted nanocellulose could be used as nanofillers for the preparation of transparent and mechanically strong PVA-based nanocomposites.
KW - Cellulose microfibers
KW - Cellulose nanocrystals
KW - Cellulose nanofibrils
KW - Hemp stalks
KW - Tensile mechanical analysis
UR - http://www.scopus.com/inward/record.url?scp=85086413383&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2020.116506
DO - 10.1016/j.carbpol.2020.116506
M3 - Article
C2 - 32718617
AN - SCOPUS:85086413383
SN - 0144-8617
VL - 245
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 116506
ER -