TY - JOUR
T1 - Enzymatically produced cellulose nanocrystals as reinforcement for waterborne polyurethane and its applications
AU - Alonso-Lerma, Borja
AU - Larraza, Izaskun
AU - Barandiaran, Leire
AU - Ugarte, Lorena
AU - Saralegi, Ainara
AU - Corcuera, Maria Angeles
AU - Perez-Jimenez, Raul
AU - Eceiza, Arantxa
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/2/15
Y1 - 2021/2/15
N2 - Waterborne polyurethanes (WBPUs) have been proposed as ecofriendly elastomers with several applications in coatings and adhesives. WBPU's physicochemical properties can be enhanced by the addition of cellulose nanocrystals (CNCs). The way CNCs are isolated has a strong effect on their properties and can determine their role as reinforcement. In this work, CNCs produced using ancestral endoglucanase (EnCNCs) were used as reinforcement for WBPU and compared with CNC produced by sulfuric acid hydrolysis (AcCNC). The enzymatic method produced highly thermostable and crystalline CNCs. The addition of small contents of EnCNCs improved the thermomechanical stability and mechanical properties of WBPUs, even better than commercial AcCNCs. Besides, WBPU reinforced by adding EnCNCs was studied as a coating for paper materials, increasing its abrasion resistance and as electrospun nanocomposite mats where EnCNCs helped maintaining the morphology of the fibers.
AB - Waterborne polyurethanes (WBPUs) have been proposed as ecofriendly elastomers with several applications in coatings and adhesives. WBPU's physicochemical properties can be enhanced by the addition of cellulose nanocrystals (CNCs). The way CNCs are isolated has a strong effect on their properties and can determine their role as reinforcement. In this work, CNCs produced using ancestral endoglucanase (EnCNCs) were used as reinforcement for WBPU and compared with CNC produced by sulfuric acid hydrolysis (AcCNC). The enzymatic method produced highly thermostable and crystalline CNCs. The addition of small contents of EnCNCs improved the thermomechanical stability and mechanical properties of WBPUs, even better than commercial AcCNCs. Besides, WBPU reinforced by adding EnCNCs was studied as a coating for paper materials, increasing its abrasion resistance and as electrospun nanocomposite mats where EnCNCs helped maintaining the morphology of the fibers.
KW - Cellulose nanocrystals
KW - Enzymatic hydrolysis
KW - Nanocomposite reinforcement
KW - Waterborne polyurethane
UR - https://www.scopus.com/pages/publications/85097334471
U2 - 10.1016/j.carbpol.2020.117478
DO - 10.1016/j.carbpol.2020.117478
M3 - Article
C2 - 33357930
AN - SCOPUS:85097334471
SN - 0144-8617
VL - 254
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 117478
ER -