Nanofibrillated cellulose in wood coatings: Dispersion and stabilization of ZnO as UV absorber

Grüneberger, Franziska; Künniger, Tina; Huch, Anja; Zimmermann, Tanja; Arnold, Martin

doi:10.1016/j.porgcoat.2015.05.025

Cited by 54 publications

(23 citation statements)

References 39 publications

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“…Nanotechnology is a promising strategy to improve water resistance, mechanical, and hygienic properties of the obtained casein-based composite films, unfortunately, most of the nanoparticles are easily aggregated in the matrix, thus decreasing the reinforcement effect and affecting their special properties. Therefore, further modification of nanoparticles to ensure the uniform dispersion in polymer matrix is always needed 26 , which is obviously a complex and time-consuming process.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of homogeneous and enhanced casein protein-based composite films via incorporating cellulose microgel

Yao

Hong-ru

Wang

et al. 2019

Sci Rep

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Gelatin-coupled cellulose (GCC) microgel with whisker-like structure is prepared and used to incorporate into casein (CA) matrix to construct reinforced CA-based composite films by solution casting. The GCC microgel has excellent dispersibility and stability in water, which contributes to the hydrophobicity and significantly reduces the moisture absorption of the composite films, as well as a decrease in the water vapor permeability with an increase of GCC content at different relative humidity is also observed. Compared with pure casein material, the resultant CA-based composite films show more homogeneous and dense cross-sectional structure, and the cleavage temperature of the hydrogen bonds increases by 16 °C. In particular, their tensile strength and Young’s modulus increase by 6 and 3.5 times, respectively. These indicators are superior to that of the nanoparticle enhanced CA-based composite film. Moreover, the light transmittance of the CA-based films at 550 nm is about 88% when GCC content is higher than 9%. The above results could be attributed to the strong hydrogen bonds formed between GCC components and CA matrix, as further confirmed by fourier transform infrared spectra and X-ray diffraction analysis.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of homogeneous and enhanced casein protein-based composite films via incorporating cellulose microgel

Yao

Hong-ru

Wang

et al. 2019

Sci Rep

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“…Therefore, instead of inorganic fillers, organic polymers such as polyacrylate 13 , vinyl acetate-acrylic 14 , cellulose [15][16][17] , starch 18 and chitosan 19 have been studied. Furthermore, bio-based nanomaterials such as nanofibrillated cellulose have been studied as reinforcing filler for a wide range of polymer matrices because of their network structure and high stiffness [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] .…”

Section: Introductionmentioning

confidence: 99%

Polyhedral Oligomeric Silsesquioxane (POSS) as Reinforcing Agent for Waterborne Polyurethane Coatings on Wood

et al. 2019

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Polyhedral oligomeric silsesquioxane (POSS) was added as a reinforcing agent in waterborne polyurethane (WPU)-based coatings to improve their properties. The morphology, structure, thermal stability as well as mechanical properties of the resulting WPU and WPU/POSS hybrid films were investigated. The good compatibility of POSS in the WPU matrices was demonstrated by transmission electron microscopy. Furthermore, Fourier-transform infrared spectroscopy analysis (FTIR) suggested the successful bonding of POSS and WPU matrices. The thermal stability of WPU/POSS hybrids was improved than that of pure WPU according to thermal gravimetric analysis (TGA). The results also revealed the enhancement of the pencil hardness and abrasion resistance of the hybrid films compared with WPU. However, the pull-off adhesion slightly decreased from Grade 0 to Grade 2.

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“…Generally, straightforward dispersion of CNC in waterborne formulations is reported, whereas chemical hydrophobization, for example by means of an organofunctional silane (Landry and Blanchet 2011) or acryloyl chloride or alkyl quaternary ammonium bromides , was required for nonpolar systems. Addition of CNF to coatings also provided improvements in mechanics (Grüneberger et al 2014a;Veigel et al 2014) and exhibited beneficial effects on the dispersion of inorganic additives (Grüneberger et al 2015;Jämsä et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Nanocellulosic fillers for waterborne wood coatings: reinforcement effect on free-standing coating films

et al. 2017

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Coatings fulfill an important function in providing functionality and service life to wood surfaces. In the present study, the potential of nanocellulosic fillers toward improving waterborne wood coating mechanics is evaluated using free-standing coating films. At 2% filler content, significant improvements in static and dynamic mechanical properties were observed. The extent of these improvements was different depending on whether high-aspect-ratio cellulose nanofibrils of short cellulose nanocrystals were used. Chemical surface modification of cellulose nanofibrils did not provide further improvement. The water-vapor sorption properties of the coating films, which were also evaluated, did not show significant effects due to addition of nanocellulose, while optical transparency slightly decreased.

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Nanofibrillated cellulose in wood coatings: Dispersion and stabilization of ZnO as UV absorber

Cited by 54 publications

References 39 publications

Preparation and characterization of homogeneous and enhanced casein protein-based composite films via incorporating cellulose microgel

Preparation and characterization of homogeneous and enhanced casein protein-based composite films via incorporating cellulose microgel

Polyhedral Oligomeric Silsesquioxane (POSS) as Reinforcing Agent for Waterborne Polyurethane Coatings on Wood

Nanocellulosic fillers for waterborne wood coatings: reinforcement effect on free-standing coating films

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