TY - JOUR
T1 - Effect of cellulose size-concentration on the structure of polyvinyl alcohol hydrogels
AU - de Lima, Gabriel Goetten
AU - Ferreira, Bruno Dias
AU - Matos, Mailson
AU - Pereira, Bruno Leandro
AU - Nugent, Michael J.D.
AU - Hansel, Fabrício Augusto
AU - Magalhães, Washington Luiz Esteves
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10/1
Y1 - 2020/10/1
N2 - Microfibrillated cellulose as a reinforcement agent has been investigated extensively due to their unique characteristics, which can reorder the structure of polymers and hydrogels leading to improved mechanical properties with minimal disadvantages in terms of the targeted original applications. However, effect of using a macro- to a micro-fibrillated cellulose onto polyvinyl alcohol hydrogels is still unknown, because of the unique ability for both to be produced as hydrogels from freeze-thawing mechanisms – hydrogen bonding - there is a potential synergism. Therefore, macro and microfibrillated kraft bleached paper was synthesised at various concentrations on polyvinyl alcohol hydrogels. The overall effect presented a strong interaction between both compounds but it was increased with macrofibrillated cellulose. Increase in crystallinity was also observed with a macro-sized fibre without variation on tensile elastic modulus but an overall improvement was perceived on thermal properties and a slower swelling rate with a microfibrillated cellulose.
AB - Microfibrillated cellulose as a reinforcement agent has been investigated extensively due to their unique characteristics, which can reorder the structure of polymers and hydrogels leading to improved mechanical properties with minimal disadvantages in terms of the targeted original applications. However, effect of using a macro- to a micro-fibrillated cellulose onto polyvinyl alcohol hydrogels is still unknown, because of the unique ability for both to be produced as hydrogels from freeze-thawing mechanisms – hydrogen bonding - there is a potential synergism. Therefore, macro and microfibrillated kraft bleached paper was synthesised at various concentrations on polyvinyl alcohol hydrogels. The overall effect presented a strong interaction between both compounds but it was increased with macrofibrillated cellulose. Increase in crystallinity was also observed with a macro-sized fibre without variation on tensile elastic modulus but an overall improvement was perceived on thermal properties and a slower swelling rate with a microfibrillated cellulose.
KW - Composite hydrogels
KW - Freeze-thawing
KW - Kraft process
KW - Microfibrillated cellulose
KW - PVA
UR - http://www.scopus.com/inward/record.url?scp=85086477187&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2020.116612
DO - 10.1016/j.carbpol.2020.116612
M3 - Article
C2 - 32718659
AN - SCOPUS:85086477187
SN - 0144-8617
VL - 245
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 116612
ER -