Castor oil-based transparent and omniphobic polyurethane coatings with high hardness, anti-smudge and anti-corrosive properties

Zhou, Mengyu; Ha, Zhiming; Lei, Lei; Xia, Yuzheng; Peng, Mao; Chen, Xiaonong; Fan, Bifa; Shi, Shuxian

doi:10.1016/j.porgcoat.2022.107120

Cited by 12 publications

(12 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Especially in the waterborne system, hydrophobic PDMS chains are usually trapped inside the latex particles, which hardly migrate to the coating surface due to the block of the polar groups. Hence, if the cross-linking degree of waterborne PU coating is too high, the trapped PDMS chains hardly migrate to the coating surface, which is more difficult than that in the solvent-based PU- g -PDMS coating system . The water in the water-based marker ink has high surface tension and poor compatibility with the PDMS enriched on the coating surface, which made it more probable for ink contraction.…”

Section: Resultsmentioning

confidence: 99%

“…However, even though no PDMS was introduced in the WPU coating, the element of Si was still detected, and the Si content reached up to 4.7%, which is attributable to the Si conductive adhesive used to attach the coating to the test bench before XPS testing. 33 After deducting the Si content of WPU, the surface Si content of WPU-g-PDMS x (x = 1, 2, 3, 4, and 5) coatings is 4.4%, 6.4%, 9.3%, 10.8%, and 12.3%, respectively, still much higher than the theoretical Si content.…”

Section: Preparation and Properties Of Wpu-g-pdms Coating 321 Prepara...mentioning

confidence: 89%

“…However, the biomass polyol starch needs to be chemically modified to increase its compatibility with other coating ingredients, and the synthesis process as well as the final PU-PDMS products contain organic solvents. Zhou used castor oil as bio-polyol for the synthesis of NP-GLIDE PU coating with excellent antismudge properties and an outstanding hardness of 6H . Castor oil is a vegetable oil with multiple hydroxyl groups that could be used as polyol for polyurethane synthesis without modification .…”

Section: Introductionmentioning

confidence: 99%

“…Zhou used castor oil as bio-polyol for the synthesis of NP-GLIDE PU coating with excellent antismudge properties and an outstanding hardness of 6H. 33 Castor oil is a vegetable oil with multiple hydroxyl groups that could be used as polyol for polyurethane synthesis without modification. 34 Due to the average hydroxyl functionality of castor oil up to 2.7, the degree of cross-linking and the hardness of the PU coating could be improved by using the castor oil as bio-polyol.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Lei

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Green and environment-friendly preparation are of the utmost relevance to the development of transparent antismudge coatings. To prepare a waterborne polyurethane (WPU) coating with antismudge property, it is challenging to balance the stability of dispersion and the antismudge property of coating. Herein, we prepare a transparent bio-based WPU coating grafted with a minor proportion of poly(dimethylsiloxane) (WPU-g-PDMS) using renewable castor oil, monocarbinol-terminated PDMS, hexamethylene diisocyanate trimer, and 2,2-bis(hydroxymethyl)propionic acid as raw materials. Effects of the dosage of monocarbinol-terminated PDMS, the curing temperature, and the curing time on the antismudge performance were studied. Results showed that rigorous stirring (3000 rpm) is necessary to obtain a stable WPU-g-PDMS dispersion with a storage time longer than 6 months. A high curing temperature (>160 °C) and a period of curing time (>1 h) are indispensable to obtain the excellent antismudge property because they would facilitate the grafted low-surface-tension PDMS chains to migrate from the interior to the coating surface. The facts that simulated contaminated liquids such as water, HCl solution, NaOH solution, artificial blood, and tissue fluid could slide off easily and cleanly, and marker ink lined on the coating surface could shrink, indicated that the WPU-g-PDMS coating has good antismudge properties, which could be self-compensated shortly after deterioration. Due to the high cross-linking degree caused by multifunctional polyol and isocyanate, the WPU-g-PDMS coating has high hardness and good anticorrosive performance. The antismudge functionalization and waterborne technology of bio-based polyurethane coatings proposed in this work could be a promising contribution to the green and sustainable development of functional coatings. This kind of WPU-g-PDMS coating is expected to protect and decorate electronic screens, vehicles, and buildings, especially endoscopes.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Preparation and Properties Of Wpu-g-pdms Coating 321 Prepara...mentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Lei

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…Diverse vegetable oils have been used, after chemical modification, as macrodiols or polyols, and several of them are now commercially available. Castor oil (CO) is the one most frequently used in the production of polyurethanes because it naturally contains hydroxyl groups that can readily react with isocyanates [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Films from Blends of Castor Oil and Polycaprolactone Waterborne Polyurethanes

2022

View full text Add to dashboard Cite

Waterborne polyurethanes (WBPUs) with relatively high biobased content (up to 43.7%) were synthesized, aiming at their use as coatings for metals and woods. The study was performed on self-standing films obtained from anionic polyurethane water dispersions (PUDs). The initially targeted PUD was prepared from castor oil (CO), while tartaric acid (TA), a byproduct of wine production, was utilized as the internal anionic emulsifier. Although the films were cohesive and transparent, they were fragile, and thus blending the CO-TA PUD with other WBPUs was the chosen strategy to obtain films with improved handling characteristics. Two different WBPUs based on polycaprolactone diol (PCL), a biodegradable macrodiol, were prepared with dimethylolpropionic acid (DMPA) and tartaric acid (TA) as synthetic and biobased internal emulsifiers, respectively. The use of blends with PCL-TA and PCL-DMPA allowed for tailoring the moduli of the samples and also varying their transparency and haze. The characterization of the neat and hybrid films was performed by colorimetry, FTIR-ATR, XRD, DMA, TGA, solubility and swelling in toluene, and water contact angle. In general, the addition of PCL-based films increases haze; reduces the storage modulus, G’, which at room temperature can vary in the range of 100 to 350 MPa; and reduces thermal degradation at high temperatures. The results are related to the high gel content of the CO-TA film (93.5 wt.%), which contributes to the cohesion of the blend films and to the crystallization of the PCL segments in the samples. The highest crystallinity values corresponded to the neat PCL-based films (32.3% and 26.9%, for PCL-DMPA and PCL-TA, respectively). The strategy of mixing dispersions is simpler than preparing a new synthesis for each new requirement and opens possibilities for new alternatives in the future.

show abstract

Phenolic Coatings

2024

Applied Coatings

View full text Add to dashboard Cite

Castor oil-based transparent and omniphobic polyurethane coatings with high hardness, anti-smudge and anti-corrosive properties

Cited by 12 publications

References 46 publications

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Hybrid Films from Blends of Castor Oil and Polycaprolactone Waterborne Polyurethanes

Phenolic Coatings

Contact Info

Product

Resources

About