Modified cardanol based colorless, transparent, hydrophobic and anti-corrosive polyurethane coating

Vijayan, Sreelakshmi P.; John, Ben; Sahoo, Sushanta K.

doi:10.1016/j.porgcoat.2021.106586

Cited by 17 publications

(12 citation statements)

References 41 publications

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“…As shown in Fig. 4 b, the thermal decomposition process of the SMPU samples proceeded in three stages, which agrees with previous PU research results 28 , 29 . Table 3 shows the pyrolysis temperatures at each stage measured from the DTG curves.…”

Section: Resultssupporting

confidence: 90%

Shape memory polyurethanes crosslinked with castor oil-based multifunctional polyols

Lee,

Kim

2023

Sci Rep

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As both the industry and academia become more focused on biomass-based smart materials, they are attracting a lot of attention. There has been a significant effort in the field of polyurethane (PU) synthesis to replace polyols used in synthesis with bio-derived polyols. Bio-derived polyols have limited application potential for bio-based PU due to their low functionality. Here, we reported castor oil (CO) based multifunctional polyols prepared by grafting thiols such as 1-mercaptoethanol or α–thioglycerol via a facile thiol-ene click reaction method (coded as COM and COT, respectively). Subsequently, bio-based shape memory polyurethanes (SMPU) crosslinked with prepared polyols were synthesized using a 2-step prepolymer method. By confirming the functionality of the synthesized polyols, it was determined that COT has an OH value of 380 mg KOH/g, which is approximately three times that of CO. The successful synthesis of SMPUs was confirmed through chemical structural analysis. It was also proved that the phase separation between the soft and hard segments was limited due to the increase in crosslinking density. As compared to SMPU crosslinked with CO, the mechanical strength of SMPU crosslinked with COT was improved by 80%, while the elongation was decreased by about 26%. As a result of shape memory behavior analysis, it was confirmed that the outstanding SMPU can be synthesized using CO-based multifunctional polyols.

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Section: Resultssupporting

confidence: 90%

Shape memory polyurethanes crosslinked with castor oil-based multifunctional polyols

Lee,

Kim

2023

Sci Rep

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“…The glass transition temperature can be used as a measure of the mobility of a chain segment to assess a polymer's thermal behaviour. 32 From À80 to À50 1C, the exothermic peak of PU is greater than that of PU/BZ. In the range of À80 to 0 1C, the total thermal change value of PU is more than that of PU/BZ, especially a very large heat absorption peak at 160 1C indicating that PU is more unstable.…”

Section: Characterization Analysismentioning

confidence: 94%

Exploration of multifunctional wood coating based on an interpenetrating network system of rosin-CO₂-based polyurethane and mussel bionic rosin-based benzoxazine

et al. 2022

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“…The synthesis of cardanol diol acrylate (CDA) from cardanol 2,3-dihydroxy propyl ether (CPE) is shown in Scheme 2, where the synthesis of CPE has already been reported in our previous work. 36 As a next step, the synthesized CPE was epoxidized using glacial acetic acid and H 2 O 2 in a two-necked RB flask to yield epoxidized CPE (ECPE). 49.5 g of CPE, 28.6 mL of acetic acid, and 11.7 g of seralite SRC-120 (25% of CPE) were stirred at room temperature for 30 min.…”

Section: Methodsmentioning

confidence: 99%

UV-Curable Bio-Based Pressure-Sensitive Adhesives: Tuning the Properties by Incorporating Liquid-Phase Alkali Lignin-Acrylates

2022

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Renewable pressure-sensitive adhesive (PSA) is an emerging field in adhesive industries as it is an excellent green alternative to depleting petroleum-sourced adhesives. Herein, we report the development of novel bio-sourced UV-curable PSAs with ∼50% biomass content originating from alkali lignin, cardanol, and linseed oil. Bio-based prepolymers cardanoldiol acrylate (CDA) and acrylated epoxidized linseed oil (AELO) were synthesized and used to prepare polyurethane acrylate (PUA)-based PSA systems. Alkali-lignin-based acrylates (LAs) in the liquid phase were incorporated into the PUA/AELO PSA system at 10–30 wt % loading to tune the functional properties. The Fourier transform infrared spectroscopy (FTIR) analysis showed weakened cross-linking in the PSA systems on LA addition, which is desirable for removable PSA applications. The single glass-transition temperature (T g) noticed in all of the PSA formulations revealed good miscibility among the oligomers/prepolymers. The viscoelastic window also confirmed that the incorporation of 10–20% LA could improve the viscoelastic properties effectively to be used as removable PSAs. The addition of 20% LA into the PUA-based PSA system showed reasonable tackiness, lap shear adhesion (166 kPa), and 180° peel strength (∼2.1 N/25 mm) for possible nonstructural or semistructural applications. Lignin improved the thermal stability by hindering the degradation rate even at higher temperatures. Therefore, lignin-based PSAs with a high bio-based content paved the way of replacing petro-sourced PSA by proper tuning of the lignin content and modifications.

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Modified cardanol based colorless, transparent, hydrophobic and anti-corrosive polyurethane coating

Cited by 17 publications

References 41 publications

Shape memory polyurethanes crosslinked with castor oil-based multifunctional polyols

Shape memory polyurethanes crosslinked with castor oil-based multifunctional polyols

Exploration of multifunctional wood coating based on an interpenetrating network system of rosin-CO₂-based polyurethane and mussel bionic rosin-based benzoxazine

UV-Curable Bio-Based Pressure-Sensitive Adhesives: Tuning the Properties by Incorporating Liquid-Phase Alkali Lignin-Acrylates

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Modified cardanol based colorless, transparent, hydrophobic and anti-corrosive polyurethane coating

Cited by 17 publications

References 41 publications

Shape memory polyurethanes crosslinked with castor oil-based multifunctional polyols

Shape memory polyurethanes crosslinked with castor oil-based multifunctional polyols

Exploration of multifunctional wood coating based on an interpenetrating network system of rosin-CO2-based polyurethane and mussel bionic rosin-based benzoxazine

UV-Curable Bio-Based Pressure-Sensitive Adhesives: Tuning the Properties by Incorporating Liquid-Phase Alkali Lignin-Acrylates

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Exploration of multifunctional wood coating based on an interpenetrating network system of rosin-CO₂-based polyurethane and mussel bionic rosin-based benzoxazine