Role of Cellulose Nanofibrils in Structure Formation of Pigment Coating Layers

Oh, Kyudeok; Lee, Jee-Hong; Im, Wanhee; Rajabi‐Abhari, Araz; Lee, Hak Lae

doi:10.1021/acs.iecr.7b02750

Cited by 24 publications

(35 citation statements)

References 24 publications

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“…The coating structure has important impact on the optical properties [81], so the network structure of polysaccharides can improve the optical properties of the paper surface. In paper coating, polysaccharides can change the rheological properties of pigment coating, increase its viscosity, and improve the uniformity and pore structure of the coating layers [23,82]. An appropriate viscosity can make the settling time of inorganic fillers longer, reduce the agglomeration, and increase the dispersion of the fillers [83].…”

Section: Pigment Coatingmentioning

confidence: 99%

“…On the contrary, HEC also adsorbs GCC particles, but its adsorption capacity is very low and would not cause flocculation. When CNF is used as the coating additive instead of CMC, it will not flocculate with the fillers or pigments [82] because of their mutual charged repulsion and the high inter-particle mobility of swollen nanocellulose. Moreover, the performance of CNF coating will not be affected by the type of fillers, because CNF is highly anionic and surrounded by bound water, which is not easy to adsorb the filler particles [23].…”

Section: Pigment Coatingmentioning

confidence: 99%

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The Application of Polysaccharides and Their Derivatives in Pigment, Barrier, and Functional Paper Coatings

Wang

Jin

et al. 2020

Polymers

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As one of the most abundant natural polymers in nature, polysaccharides have the potential to replace petroleum-based polymers that are difficult to degrade in paper coatings. Polysaccharide molecules have a large number of hydroxyl groups that can bind strongly with paper fibers through hydrogen bonds. Chemical modification can also effectively improve the mechanical, barrier, and hydrophobic properties of polysaccharide-based coating layers and thus can further improve the related properties of coated paper. Polysaccharides can also give paper additional functional properties by dispersing and adhering functional fillers, e.g., conductive particles, catalytic particles or antimicrobial chemicals, onto paper surface. Based on these, this paper reviews the application of natural polysaccharides, such as cellulose, hemicellulose, starch, chitosan, and sodium alginate, and their derivatives in paper coatings. This paper analyzes the improvements and influences of chemical structures and properties of polysaccharides on the mechanical, barrier, and hydrophobic properties of coated paper. This paper also summarizes the researches where polysaccharides are used as the adhesives to adhere inorganic or functional fillers onto paper surface to endow paper with great surface properties or special functions such as conductivity, catalytic, antibiotic, and fluorescence.

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Section: Pigment Coatingmentioning

confidence: 99%

Section: Pigment Coatingmentioning

confidence: 99%

The Application of Polysaccharides and Their Derivatives in Pigment, Barrier, and Functional Paper Coatings

Wang

Jin

et al. 2020

Polymers

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“…For example, MFC-containing adhesive was more uniformly distributed in the particle board due to the shear-thinning nature of the mixture (Mahrdt et al 2016). In addition, the presence of MFC in coloured coating formulations resulted in less flocculation of the dye particles (Dimic-Misic et al 2013;Oh et al 2017). The intrinsic viscoelastic properties and flow characteristics of MFC suspensions widen their use as rheology modifiers, ultimately increasing the number of commercial applications (Nechyporchuk et al 2016a).…”

Section: Introductionmentioning

confidence: 99%

Tailoring of rheological properties and structural polydispersity effects in microfibrillated cellulose suspensions

et al. 2020

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Industrial production of low-charge microfibrillated cellulose (MFC) typically results in wide fibril size distributions. This polydispersity influences viscosity, overall colloidal stability, and rheological properties of MFC suspensions and gels in aqueous systems. In this work, a systematic rheological analysis is performed for industrially prepared MFC and fractions of different size distributions. Gel formation and flow characteristics (e.g., shear-thinning) of each fraction are examined under neutral and acidic conditions and compared with the unfractionated MFC suspension. The effects of size, aspect ratio, and surface charge on the rheology of semi-dilute MFC suspensions are discussed. The results demonstrate that particle size and aspect ratio distribution control the viscoelasticity and shear-thinning properties of MFC suspensions. An increased fraction of small diameter nanofibrils, by ex situ addition of the fine particles with high aspect ratio or removal of the coarsest particles (with lower aspect ratio) by fractionation, significantly enhances the storage modulus and the yield stress of the complex mixture, compared to the properties of the coarser fractions. New insights are also reported on the tailoring of the rheology of highly polydisperse fibrillar mixtures, where the rheological contributions of each fraction are discussed. Graphic abstract

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“…More detailed information on the instrument and operating principle can be found in literature. 20,24,25…”

Section: Experimental Sectionmentioning

confidence: 99%

Structural Changes of the Coating Layer by Styrene/Acrylate Latex with Hydroxyethyl Methacrylate

Kwon¹,

Shin³

et al. 2019

ACS Omega

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The coating structure is directly related to quality of coated paper, especially printability. Its structure mainly consists of pigment, binder, and additives. Binder has a significant influence on the coating structure because it is involved in the structure forming process and takes a key role in maintaining the structure. In this study, styrene acrylate (S/A) latex with hydroxyethyl methacrylate (HEMA) as a comonomer was used as a binder, and the influence of HEMA contents on latex swelling and coating structure was investigated. The S/A latex particle swelled more with an increasing HEMA content, which significantly influenced coating color and coating layer characteristics. The viscosity of coating color became thick, and the dewatering of coating color was suppressed. The HEMA monomer that swelled latex particle allowed the coating layer to consolidate rapidly, which made the coating layer more porous and more uniform.

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Role of Cellulose Nanofibrils in Structure Formation of Pigment Coating Layers

Cited by 24 publications

References 24 publications

The Application of Polysaccharides and Their Derivatives in Pigment, Barrier, and Functional Paper Coatings

The Application of Polysaccharides and Their Derivatives in Pigment, Barrier, and Functional Paper Coatings

Tailoring of rheological properties and structural polydispersity effects in microfibrillated cellulose suspensions

Structural Changes of the Coating Layer by Styrene/Acrylate Latex with Hydroxyethyl Methacrylate

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