Enhanced homogeneity and interfacial compatibility in melt-extruded cellulose nano-fibers reinforced polyethylene via surface adsorption of poly(ethylene glycol)- block -poly(ethylene) amphiphiles

Volk, Ned; He, Rongliang; Magniez, Kevin

doi:10.1016/j.eurpolymj.2015.09.025

Cited by 52 publications

(25 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The rheological property of the 3 FNPs was studied and the results were shown in Figure . A rapid decrease in viscosity was observed in all samples with increasing the shear rate, indicating that all dispersions behave as non‐Newtonian (pseudo plastic), shear‐thinning fluids (Volk and others ). This is attributed to the disruption of physical forces, such as hydrogen binding, Van der Waals' force and hydrophobic interaction, as a result of shearing force.…”

Section: Resultsmentioning

confidence: 83%

Characteristics and Rheological Properties of Polysaccharide Nanoparticles from Edible Mushrooms (Flammulina velutipes)

Wang

Cong

et al. 2017

Journal of Food Science

View full text Add to dashboard Cite

Nanotechnology has become relevant in the food-related industries, and edible mushrooms can be a potential raw material for providing satisfied edible nanomaterial. In this study, by following 3 different pretreatments (hot water or cold alkali or hot alkali) insoluble polysaccharide nanoparticles were prepared from Flammulina velutipes by wet milling and high pressure homogenization and their properties were investigated. The resultant nanoparticles were characterized by SEM, GC-MS (for its main compositions), FTIR, XRD, and TG. The 1 wt% nanoparticle dispersions presented non-Newtonian, shear-thinning fluids with the viscosity in an increasing order for the hot water < cold alkali < hot alkali. Moreover, the dynamical rheological results showed differences of storage (G') and loss (G″) moduli of these particle dispersions. It was concluded that the Flammulina velutipes-derived polysaccharides nanoparticles have great potential applications in the food industry, for example, as emulsifiers, reinforcement agents, and bioactive carriers.

show abstract

Section: Resultsmentioning

confidence: 83%

Characteristics and Rheological Properties of Polysaccharide Nanoparticles from Edible Mushrooms (Flammulina velutipes)

Wang

Cong

et al. 2017

Journal of Food Science

View full text Add to dashboard Cite

show abstract

“…Azouz et al used poly(ethylene oxide) (PEO) as a compatiblizer to improve the dispersion of CNCs in the LDPE matrix as reflected by the transparent nature of the nanocomposites thus made; however, the mechanical properties of the extruded nanocomposite films only showed a very modest increase of the tensile modulus and strength, which was attributed to the enhanced dispersion of CNCs induced by low molecular weight of PEO . Recently, Volk et al used poly(ethylene glycol‐ b ‐ethylene) as a compatibilizer when melt‐compounding linear low‐density polyethylene and microfibrillated cellulose. The resulting nanocomposites contained almost no visible aggregates and the mechanical properties were moderately improved compared to a reference composite without the compatibilizer.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Properties of Polyethylene/Cellulose Nanocrystal Composites

Sapkota

Natterodt

Shirole

et al. 2016

Macromol. Mater. Eng.

View full text Add to dashboard Cite

a laboratory scale, many polymer/CNC nano composites have been prepared and were demonstrated to exhibit a significant improvement in mechanical properties over the parent polymers. However, the technological exploitation of CNCs as reinforcing filler will hinge on the question if or how well such laboratory-scale results can be achieved by technologically viable processes. Unfortunately, systematic studies that correlate processing, structure, and mechanical properties of CNC nanocomposites are rare. In a previous study we demonstrated that once CNCs are well dispersed in amphiphilic polymers such as poly(vinyl acetate) [11] or hydrophobic polymers such as low-density polyethylene (LDPE), [16] they can be subsequently reprocessed via melt-mixing and retained similar dispersion and mechanical reinforcement, as long as highshear mixing, which caused mechanical degradation of the CNCs, was avoided.It appears to be particularly difficult to fabricate composites of the rather polar CNCs in hydrophobic polymer matrices such as LDPE, as the polarity differenceThe preparation of nanocomposites of low-density polyethylene (LDPE) and cellulose nanocrystals (CNCs) isolated from cotton or produced in situ by the dispersion of microcrystalline cellulose (MCC) is reported. The hydrophobic matrix polymer and the rather polar filler particles appear to be difficult to mix, but it is shown here that composites with significantly improved mechanical characteristics and of homogeneous appearance can be produced using an organic-solvent-free two-step process. This is achieved by first mixing an aqueous slurry of an LDPE powder with an average particle size of <600 μm with aqueous suspensions of CNCs or MCC and removing most, but not all, of the water. Compounding such water-plasticized mixtures in a roller-blade mixer and subsequent compression-molding afford highly transparent films, whose room-temperature storage modulus is increased by a factor of 2.5 upon incorporation of 15% w/w CNCs or MCC. The results demonstrate that LDPE/nanocellulose composites with improved mechanical properties can be produced by an organic solvent-free process that appears to be scalable to industrial production scale.

show abstract

“…These include grafting hydrophobic compounds to the cellulose surface to make the fibrils more hydrophobic, often combined with a solvent exchange step de Menezes et al 2009). Surfactants or the surface adsorption of amphiphilic co-polymers have also been used to improve the dispersion and compatibility of the CNF in the polymer matrix (Volk et al 2015). These methods have been effective, but the use of non-polar solvents and multiple reaction steps may limit their industrial relevance.…”

Section: Introductionmentioning

confidence: 99%

Cellulose nanofibril-reinforced composites using aqueous dispersed ethylene-acrylic acid copolymer

et al. 2018

View full text Add to dashboard Cite

In order to explore the reinforcing capabilities of cellulose nanofibrils, composites containing high contents of cellulose nanofibrils were prepared through a combination of water-assisted mixing and compression moulding, the components being a cellulose nanofibril suspension and an aqueous dispersion of the polyolefin copolymer poly(ethylene-co-acrylic acid). The composite samples had dry cellulose nanofibril contents from 10 to 70 vol%. Computed tomography revealed well dispersed cellulose fibril/fibres in the polymer matrix. The highest content of 70 vol% cellulose nanofibrils increased the strength and stiffness of the composites by factors of 3.5 and 21, respectively, while maintaining an elongation at break of about 5%. The strength and strain-at-break of cellulose nanofibril composites were superior to the pulp composites at cellulose contents greater than 20 vol%. The stiffness of the composites reinforced with cellulose nanofibrils was not higher than for that of composites reinforced with cellulose pulp fibres.

show abstract

Enhanced homogeneity and interfacial compatibility in melt-extruded cellulose nano-fibers reinforced polyethylene via surface adsorption of poly(ethylene glycol)- block -poly(ethylene) amphiphiles

Cited by 52 publications

References 45 publications

Characteristics and Rheological Properties of Polysaccharide Nanoparticles from Edible Mushrooms (Flammulina velutipes)

Characteristics and Rheological Properties of Polysaccharide Nanoparticles from Edible Mushrooms (Flammulina velutipes)

Fabrication and Properties of Polyethylene/Cellulose Nanocrystal Composites

Cellulose nanofibril-reinforced composites using aqueous dispersed ethylene-acrylic acid copolymer

Contact Info

Product

Resources

About