Rheological behaviour of nanocellulose reinforced unsaturated polyester nanocomposites

Chirayil, Cintil Jose; Mathew, Lizzy; Hassan, P. A.; Mozetič, Miran; Thomas, Sabu

doi:10.1016/j.ijbiomac.2014.05.055

Cited by 81 publications

(33 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 2(a) indicates that the temperature range of the maximum thermal decomposition rate of the NH 4 HCO 3 was from 70°C to 86°C, for three different particle sizes of CaCO 3 . The gel time of resin glue in the preparation of CaCO 3 /LDUPR should be controlled in the range of 25.0 min to 35.0 min [17][18][19], where, the gel time of resin glue lasted 4.0 min [20,21]. Figure 2(b) shows that the bleed time of NH 4 HCO 3 was 39.3-28.9 min in the temperature range of 72.0-80.0°C.…”

Section: Resultsmentioning

confidence: 99%

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Wang

2020

Mater. Res. Express

View full text Add to dashboard Cite

Incorporation of different fine grain calcium carbonate into CaCO 3 /low-density unsaturated polyester resin (LDUPR) composites was studied and evident mechanical enhancement of CaCO 3 on composites was investigated. Preliminary experiment results indicated that proper content of CaCO 3 was less than 30.00 phr (parts per hundreds of resin), suitable preparation temperature range was from 72.0°C to 80.0°C, and initiator content was 1.80 phr. Optimal preparation conditions of CaCO 3 /LDUPR samples were obtained with the presence of 25.00 phr CaCO 3 and 2.50 phr NH 4 HCO 3 at 76.0°C based on preliminary experiments. The lowest apparent density of A-CaCO 3 /LDUPR composite was 0.53±0.02 g·cm −3 with a compressive strength of 20.27±0.51 MPa·g −1 ·cm 3 , and the highest specific compressive strength of the sample was 38.25±1.43 MPa·g −1 ·cm 3 . It is attributed to the hindrance to cross-linking between unsaturated polyester and styrene, and to the decrease of exothermic heat of the polymerization, which was caused by the existence of CaCO 3 . Unusual matrix microstructure with regular ripples and dimples formed by CaCO 3 , and the particular mechanical enhancement of regular ripples and dimples in composites were explored. 'CaCO 3 reefs' concept, reefs-induced ripples, dimples of streams flowing, and resolution of external force with major force further being consumed models comprised the regulated mechanical enhancement of CaCO 3 in CaCO 3 /LDUPR composites. This particular polymerization retarding and mechanical strengthening were obvious for the finest grain CaCO

show abstract

Section: Resultsmentioning

confidence: 99%

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Wang

2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…One biomaterial, cellulose is widely used for papermaking and garments, and is beginning to find application in bioenergy, and reinforcing agents in composites (Henriksson & Berglund, 2007;Iwamoto, Nakagaito, &Yano, 2007;Klemm et al, 2006). Cellulose consists of ␤-1,4 linked glucopyranose units (Azizi Samir, Alloin, & Dufresne, 2005;Chirayil, Mathew, Hassan, Mozetic, & Thomas, 2014;Khalil et al, 2014). acid hydrolysis by Mukherjee and Woods (1953).…”

Section: Introductionmentioning

confidence: 99%

Preparation of highly charged cellulose nanofibrils using high-pressure homogenization coupled with strong acid hydrolysis pretreatments

Tian

et al. 2016

Carbohydrate Polymers

105

View full text Add to dashboard Cite

“…Existing literature on CNF/UP composites primarily focuses on low content of CNF (up to 20%). Chirayil et al [9,10] studied UP composites with CNF content up to 5 wt% and observed that the mechanical properties were favorable at 0.5 wt%. The drop in properties at higher CNF content is usually due to agglomeration of the fibrils, and the agglomerates initiate premature failure.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured biocomposites based on unsaturated polyester resin and a cellulose nanofiber network

Ansari

Skrifvars

Berglund

2015

Composites Science and Technology

View full text Add to dashboard Cite

Biocomposites reinforced by natural plant fibers tend to be brittle, moisture sensitive and have limited strength. Wood cellulose nanofibers (CNF) were therefore used to reinforce an unsaturated polyester matrix (UP) without the need of coupling agents or CNF surface modification. The nanostructured CNF network reinforcement strongly improves modulus and strength of UP but also ductility and toughness. A template-based prepreg processing approach of industrial potential is adopted, which combines high CNF content (up to 45vol%) with nanoscale CNF dispersion. The CNF/UP composites are subjected to moisture sorption, dynamic thermal analysis, tensile tests at different humidities, fracture toughness tests and fractography. The glass transition temperature (T g ) increases substantially with CNF content.Modulus and strength of UP increase about 3 times at 45vol% CNF whereas ductility and apparent fracture toughness are doubled. Tensile properties at high humidity are compared with other biocomposites and interpreted based on differences in molecular interactions at the interface.

show abstract

Rheological behaviour of nanocellulose reinforced unsaturated polyester nanocomposites

Cited by 81 publications

References 35 publications

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Preparation of highly charged cellulose nanofibrils using high-pressure homogenization coupled with strong acid hydrolysis pretreatments

Nanostructured biocomposites based on unsaturated polyester resin and a cellulose nanofiber network

Contact Info

Product

Resources

About

Rheological behaviour of nanocellulose reinforced unsaturated polyester nanocomposites

Cited by 81 publications

References 35 publications

Mechanical enhancement of ripples and dimples in CaCO3/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO3/low-density unsaturated polyester resin composites

Preparation of highly charged cellulose nanofibrils using high-pressure homogenization coupled with strong acid hydrolysis pretreatments

Nanostructured biocomposites based on unsaturated polyester resin and a cellulose nanofiber network

Contact Info

Product

Resources

About

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites