Improving the property of castor oil-based waterborne polyurethane by polyhydroxy sapium sebiferum oil as crosslinking agent

Lyu, Bin; Zhang, Henian; Gao, Dangge; Ma, Jianzhong

doi:10.1016/j.porgcoat.2022.106893

Cited by 5 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present case, the same general result was observed for the CO-TA film [ 32 ]. As seen in the table, all formulated mixtures are more hydrophilic (lower contact angle) than CO-TA, especially the mixtures formulated with PCL-TA [ 36 , 38 , 39 ]. This is related to the higher hydrophilic nature of the surface of PCL-TA, which could be explained by the presence of the two carboxylate groups of the diacid in the original TA molecule, a result that has been also previously reported [ 38 ].…”

Section: Resultsmentioning

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

Section: Resultsmentioning

confidence: 99%

Hybrid Films from Blends of Castor Oil and Polycaprolactone Waterborne Polyurethanes

2022

View full text Add to dashboard Cite

show abstract

“…The hydroxyl value of the polyols was determined by the phthalic anhydride method: [ 34 ] 25 mL of the phthalic anhydride‐pyridine mixture (the mass ratio is 6.1:1) and 1.0 g (m, g) of CM or CO were added to a flask under continuous stirring. After the mixture reacted at 113–117 °C for 1 h, the product was titrated with 1 mol L −1 (c) NaOH solution with phenolphthalein as an indicator.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, during the past years, a series of vegetable oils (such as soybean oil, castor oil, linseed oil, etc.) have been modified utilizing transesterification, [ 31 ] epoxy ring‐opening reaction, [ 32,33 ] and thiol‐ene click reaction, [ 34,35 ] to introduce more hydroxyl groups and employed as bio‐derived polyol cross‐linker to prepare vegetable oil‐based WPU with improved water resistance. For example, Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, during the past years, a series of vegetable oils (such as soybean oil, castor oil, linseed oil, etc.) have been modified utilizing transesterification, [31] epoxy ringopening reaction, [32,33] and thiol-ene click reaction, [34,35] to introduce more hydroxyl groups and employed as bio-derived polyol cross-linker to prepare vegetable oil-based WPU with improved water resistance. For example, Zhang et al prepared bio-based polyols with different hydroxyl values by epoxidation and reduction of various vegetable oils (castor oil, epoxidized soybean oil, and epoxidized linseed oil) with LiAlH 4 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

From Castor Oil‐Based Multifunctional Polyols to Waterborne Polyurethanes: Synthesis and Properties

Zhang

Shi³

et al. 2023

Macro Materials & Eng

Self Cite

View full text Add to dashboard Cite

A novel castor oil-based multifunctional polyol (CM) is fabricated through mild thiol-ene photo induced reactions using castor oil (CO) and 1-thioglycerol (MPD) as building blocks. The effect of the reaction time, molar ratio of thiol to carbon-carbon double bond, and the loadings of photo-initiator are optimized. The resulting CM is combined with CO and employed as cross-linkers to prepare castor oil-based water-borne polyurethane emulsion with desirable mechanical properties and water resistance. Owing to the incorporation of CM cross-linker with high hydroxyl value of 371 mg KOH/g (which is 2.27 times higher than that of the CO), the prepared castor oil-based waterborne polyurethane (CMWPU) possesses compacted 3D network structure with high cross-linking degree, leading to improved glass transition temperature (45 °C), tensile strength (10.8 MPa), water contact angle (87.4°), and decreased water absorption rate (16.12%) with 20% CM additions. Overall, this work illustrates the feasibility of introducing bio renewable CM combined with CO to develop castor oil-based WPU employing a sustainable development strategy.

show abstract

Recent Advances in Polyurethane Coatings and Adhesives Derived from Vegetable Oil-Based Polyols

Kaikade

Sabnis

2023

J Polym Environ

View full text Add to dashboard Cite

Improving the property of castor oil-based waterborne polyurethane by polyhydroxy sapium sebiferum oil as crosslinking agent

Cited by 5 publications

References 33 publications

Hybrid Films from Blends of Castor Oil and Polycaprolactone Waterborne Polyurethanes

Hybrid Films from Blends of Castor Oil and Polycaprolactone Waterborne Polyurethanes

From Castor Oil‐Based Multifunctional Polyols to Waterborne Polyurethanes: Synthesis and Properties

Recent Advances in Polyurethane Coatings and Adhesives Derived from Vegetable Oil-Based Polyols

Contact Info

Product

Resources

About