Impact of functionalised dispersing agents on the mechanical and viscoelastic properties of pigment coating

Touaiti, Farid; Pahlevan, Mahdi; Nilsson, Robert; Alam, Parvez; Toivakka, Martti; Ansell, Martin P.; Wilén, Carl‐Eric

doi:10.1016/j.porgcoat.2012.08.013

Cited by 15 publications

(7 citation statements)

References 15 publications

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“…Previous research on colloidal composites has explored the effects of nanoparticles of various compositions, for example, silica 14,44 , titania, 15 and calcium carbonate, 45,46 to name but a few, on mechanical properties, but have not compared the effects of fillers with dimensions both greater and less than 1 m (or a wide range of size ratios) in the same studies. Systematic studies of filler size over a wide range in colloidal composites are lacking.…”

Section: Introductionmentioning

confidence: 99%

Colloidal polymer composites: Are nano-fillers always better for improving mechanical properties?

Makepeace

Locatelli

Lindsay

et al. 2018

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Colloidal polymer composites: Are nano-fillers always better for improving mechanical properties?

Makepeace

Locatelli

Lindsay

et al. 2018

Journal of Colloid and Interface Science

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“…3),4),12) Touaiti et al 13) investigated the influence of a copolymer polyelectrolyte dispersant on the viscoelastic properties of a pigment (CaCO 3 ) coated by styrene acrylate latex and styrene butadiene latex. They evaluated the material stiffness and damping properties via the storage modulus and loss tangent, respectively.…”

Section: Introductionmentioning

confidence: 99%

Influence of phenylalanine on viscoelastic properties of alumina suspensions

Hayano

Hirata

Sameshima

et al. 2014

J. Ceram. Soc. Japan

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The influence of phenylalanine as a dispersant on the viscoelastic properties of alumina suspensions at pH 7.0 was examined in the temperature range from 100°C to +100°C. Only a small amount of phenylalanine, with both NH 3 + and COO groups present in each molecule, was adsorbed onto the positively charged alumina surfaces at room temperature. The peaks of the storage modulus and loss tangent, which were associated with the colloidal phase transition from a dispersed state to a flocculated state, were observed in 10 vol % suspensions in 3962°C temperature range. The addition of a small amount phenylalanine enhanced the dispersibility of alumina particles and suppressed the colloidal phase transition. In the concentrated 2030 vol % alumina suspensions containing phenylalanine, no phase transition was evident in the storage modulus or loss tangent measurements of the suspension upon heating. The addition of phenylalanine to the concentrated suspensions drastically reduced the apparent viscosity at room temperature.

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“…The sheets were further dried in oven at 80 o C for 4 hours, Figure 2. and weight of the manufactured samples [24]. An Instron 8872 was used for tensile testing with the crosshead speed of 1mm min −1 .…”

Section: Manufacture Of Tempo-oxidised Bacterial Cellulose Sheets Covmentioning

confidence: 99%

Mechanical properties of TEMPO-oxidised bacterial cellulose-amino acid biomaterials

Pahlevan

Toivakka

Alam

2018

European Polymer Journal

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Amino acid functionalised bacterial cellulose is a non-toxic biocompatible material, which can be further modified with active groups and nanoparticles for various biomedical applications. Many studies have focused mainly on the chemical and biomedical characterisation of modified bacterial cellulose; however, the mechanical performance of these materials remains undetermined. In this paper, we investigate the mechanical performance of amino acid modified TEMPO-oxidised bacterial cellulose (TOBC-AA). Highly crystalline bacterial cellulose was initially oxidised via TEMPO-mediated oxidation and amino acids-specifically glycine, alanine and proline-were grafted to TOBC via EDAC/NHS coupling agent. Manufactured materials have been tested and compared with pure bacterial cellulose and our recently studied monomeric amino acid bio-glues. Under tensile loading, the rigid crystalline structure of the copolymer has a slightly higher strength and toughness compared to pure BC, however its adhesive properties were significantly lower than those of monomeric amino acids. The side chains on TOBC-AA physically interlock under the conditions of shear; however amino acids grafted to BC lack mobility and the ability to form H-bonds, in contrast to monomeric amino acid such as glycine and alanine. Table 1-List of abbreviations List of abbreviation BC Bacterial cellulose TOBC TEMPO oxidised bacterial cellulose AA Amino Acid Ala Alanine Gly Glycine Pro Proline BC-AA Bacterial cellulose based composite with monomeric amino acid TOBC-AA Amino acid modified TEMPO oxidised bacterial cellulose TEMPO 2,2,6,6-tetramethylpiperidine-1-oxyl NHS N-hydroxy-succinimide EDAC N-ethyl-N-(3-dimethylaminopropyl)-carbodiimide hydrochloride

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Impact of functionalised dispersing agents on the mechanical and viscoelastic properties of pigment coating

Cited by 15 publications

References 15 publications

Colloidal polymer composites: Are nano-fillers always better for improving mechanical properties?

Colloidal polymer composites: Are nano-fillers always better for improving mechanical properties?

Influence of phenylalanine on viscoelastic properties of alumina suspensions

Mechanical properties of TEMPO-oxidised bacterial cellulose-amino acid biomaterials

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