Effect of particle diameter on the permeability of polypropylene/SiO2 nanocomposites

Dougnac, Vivianne N.; Alamillo, Ricardo; Peoples, Brian C.; Quijada, Raúl

doi:10.1016/j.polymer.2010.02.014

Cited by 41 publications

(41 citation statements)

References 37 publications

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“…The incorporation of silica into polypropylene matrix is an attractive way to significant improvements in the properties of the composites, e.g., mechanical strength and elastic modulus, thermal stability, chemical resistance, heat and flame resistance, and reduction in gas permeability [9][10][11][12][13]. These properties led to the application of silica/polypropylene composites in various industrial fields, e.g., packaging, automotive, medical, and textile industries [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Nucleation ability of advanced functional silica/lignin hybrid fillers in polypropylene composites

Borysiak

Kłapiszewski

Bula

et al. 2016

J Therm Anal Calorim

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Novel advanced functional silica/lignin hybrid fillers were synthesized for the purpose of their application in composites with polypropylene. The use of lignin for the production of hybrid fillers is justified due to the advantages such as reduction in cost of products, improvement in biodegradability as well as antioxidant and antimicrobial properties. The study encompasses an analysis of the dispersive and morphological properties of the hybrid fillers, and investigations of phase transitions and the supermolecular structure of the composites by means of differential scanning calorimetry, polarized light microscopy, and X-ray diffractometry. The nucleation activity of the hybrid fillers was found to be strongly correlated with the chemical composition of the fillers, and their dispersive properties and porous structure characteristics. Furthermore, the particle size and area surface of the hybrid fillers play an important role in the development of polymorphic varieties of the polypropylene matrix. The study also discusses the mechanism of the formation of the b-PP variety and the transcrystalline structure in the context of the nucleation ability of the hybrid fillers. The investigations are very significant because they address the impact of the actual physicochemical parameters of the hybrid fillers on the nucleation ability and structure of composite materials.

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Section: Introductionmentioning

confidence: 99%

Nucleation ability of advanced functional silica/lignin hybrid fillers in polypropylene composites

Borysiak

Kłapiszewski

Bula

et al. 2016

J Therm Anal Calorim

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“…[1][2][3][4] However, the weak compatibility between organic matrix and inorganic nanoparticles, which usually results in unevenly dispersion of inorganic nanoparticles in the matrix, is the main problems in practical applications. The covalent grafting of silane molecular on inorganic surfaces has been attempted to improve the dispersion and received some effect.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Colloidal Silica Nanoparticles: Controlling the size and Grafting Process

He¹,

Wu²,

Li³

et al. 2013

Bulletin of the Korean Chemical Society

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Surface modification of colloidal silica nanoparticles without disrupting the electric double layer of nanoparticles is a major challenge. In the work, silane was employed to modify colloidal silica nanoparticles without inducing bridge flocculation obviously. The effect of pH value of the silica sol, the amount of silane in feed, and reaction temperature on the graft amount and the final size of modified particles was investigated. The increased weight loss by TG and the appearance of T 2 and T 3 except for Q 2 and Q 3 signals by CP/MAS 29 Si NMR of the modified samples verified the successful grafting of silane. The graft amount reached 0.57 mmol/ g, which was slightly lower than theory value, and the particle size remained nearly the same as unmodified particles for acidic silica sol at the optimum condition. For alkaline silica sol after modification, aggregates composed of several nanoparticles connected together with silane moleculars as the bridge appeared.

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“…The reinforcement effect of CaCO 3 filler was evidenced by an increase in the maximum stress of 24% and 35% for CaCO 3 (2) and CaCO 3 (5), respectively comparing with the original LLDPE. Furthermore, similar behaviour was observed for silica filler, being more evident in the SiO 2 (5) sample where the tensile strength increases up to 26% with respect to the LLDPE value.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

Study of mechanical and physical properties of LLDPE-G-MA injection grade reinforced with coffee husk post-industrial waste

Yepes

Jaén-Posada

Jaramillo

et al. 2016

Journal of Composite Materials

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In this work, the evaluation of a post-industrial residue of coffee industry (coffee husk) as organic filler in functionalised linear low-density polyethylene matrix was investigated. The properties of these composites were compared with more widely used inorganic fillers, such as calcium carbonate and SiO 2 . All the composites were prepared by grafting of linear low-density polyethylene maleic anhydride and then by melt mixing of fillers. The rheological behaviour of the compounds during processing was established to evaluate the effects of a nanosized (SiO 2 ), micron sized calcium carbonate and coffee husk fillers. Additionally, thermal, morphological and mechanical properties of the polymer composites were evaluated. The results indicated an increase in tensile modulus and tensile strength resulting from incorporation of fillers in the polymer matrix. Some relevant modifications of melting temperature and crystallinity degree for coffee husk composites were observed, but not observed for inorganic fillers composites. The properties of the composites prepared with coffee husk were comparable to those obtained with inorganic fillers, demonstrating that this coffee residue can be used as filler for obtaining composites for many possible applications.

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Effect of particle diameter on the permeability of polypropylene/SiO2 nanocomposites

Cited by 41 publications

References 37 publications

Nucleation ability of advanced functional silica/lignin hybrid fillers in polypropylene composites

Nucleation ability of advanced functional silica/lignin hybrid fillers in polypropylene composites

Surface Modification of Colloidal Silica Nanoparticles: Controlling the size and Grafting Process

Study of mechanical and physical properties of LLDPE-G-MA injection grade reinforced with coffee husk post-industrial waste

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