Properties and Application of Waterborne Polyurethane/starch Composite Surface Sizing Agent

Yu, Guo; Li, Shu Cai; Wang, Gao Sheng

doi:10.4028/www.scientific.net/amr.317-319.15

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…PUDs can be tailored to various applications by varying the preparation method and chemical structure of the polyurethane. Waterborne PUDs have been used particularly as coatings for various fibers, adhesives for alternative substrates, primers for metals, caulking materials, emulsion polymerization media for different monomers, paint additives, defoamers, associate thickeners, pigment pastes, and textile dyes. − The early studies of Dieterich et al , on waterborne PUDs are considered the first and inspired much of the work in this field. Anionic colloidal PUDs consist of different chemical species and can be synthesized by a reaction of diisocyanates, polyol, and a dihydroxy acid, such as dimethylolpropanic acid (DMPA), that incorporates carboxylic functionality in the prepolymer backbone.…”

Section: Introductionmentioning

confidence: 99%

Rheological Behavior of Environmentally Friendly Castor Oil-Based Waterborne Polyurethane Dispersions

2013

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Novel biorenewable, waterborne, castor oil-based polyurethane dispersions (PUDs) were successfully synthesized via homogeneous solution polymerization in methyl ethyl ketone followed by solvent exchange with water. Small-amplitude oscillatory shear flow experiments were used to systematically investigate the rheological behavior of these environmentally friendly, biorenewable, aqueous dispersions as a function of angular frequency, solid content, and temperature. In addition, the morphology of the dispersions was investigated at 60 °C for different time intervals using transmission electron microscopy (TEM). The solid content and temperature were found to significantly affect the rheological behavior of the PUDs. The composition dependency of the complex viscosity (η*) was found to be well described by the Krieger–Dougherty equation. Thermally induced gelation was observed for PUDs with a solid content ≥27 wt %. Although the viscoelastic behavior of the PUDs was well described by the time–temperature superposition (TTS) principle in a temperature range lower than the gel point, TTS failed to represent the behavior of the PUDs at temperatures near the critical gel point. The real time gelation behavior was also studied for different solid contents of PUDs under isothermal conditions over a wide range of angular frequencies. Furthermore, both G′ and G″ showed a power law relationship with the angular frequency at the gel point, with critical power law exponents similar to those predicted theoretically by percolation theory. Aggregation and interconnection of the nano-PU particles caused the formation of fractal gels at a critical temperature, as confirmed by TEM.

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Section: Introductionmentioning

confidence: 99%

Rheological Behavior of Environmentally Friendly Castor Oil-Based Waterborne Polyurethane Dispersions

2013

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“…Surface sizing agents (SSAs) are used in the paper industry in order to improve the surface physical strength, friction resistance, waterproof and smoothness of paper [1] . The type of SSA has a significant effect on the final product's properties, and the commonly used SSAs include starch, gelatin, polyvinyl alcohol (PVA), methyl cellulose, carboxymethyl cellulose, and paraffin wax [2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

Research on Effect of Biolatex Surface Sizing on Paper Properties

Zou,

Lin

2018

Paper and Biomaterials

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Biolatex, a new type of paper coating adhesive that has been developed in recent years, has mainly been used in pre-coating and middle coating, due to its advantages of decreasing the associated cost and pollution by partly replacing petro-latex. In this paper, application of biolatex as a surface sizing agent and effects of various factors, such as titanium dioxide addition, on the properties of the sized paper were compared. The results showed that, addition of titanium dioxide to biolatex could improve the whiteness, internal bond strength, and ink absorption. Furthermore, application of the No.4 biolatex resulted in better surface strength, bond strength, and ink absorption of the sized paper than application of polyvinyl alcohol.

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Effects of Waterborne Elastic Polyester with Different Compositions on the Properties and Compatibility of Maize Starch

Zhang

Zheng

Lin

et al. 2021

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Properties and Application of Waterborne Polyurethane/starch Composite Surface Sizing Agent

Cited by 4 publications

References 6 publications

Rheological Behavior of Environmentally Friendly Castor Oil-Based Waterborne Polyurethane Dispersions

Rheological Behavior of Environmentally Friendly Castor Oil-Based Waterborne Polyurethane Dispersions

Research on Effect of Biolatex Surface Sizing on Paper Properties

Effects of Waterborne Elastic Polyester with Different Compositions on the Properties and Compatibility of Maize Starch

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