Fully Bio-based Polybenzoxazines Derived from Thymol: Thermal Stability, Hydrophobicity and Corrosion Resistant Properties

Mydeen, K. Mohamed; Kanth, J. Praveen; Arumugam, Hariharan; Krishnasamy, Balaji; Rameshkumar, S.; Rathika, G.; Alagar, Muthukaruppan

doi:10.1007/s10924-022-02593-0

Cited by 25 publications

(17 citation statements)

References 32 publications

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“…The greatly increased corrosion resistance confirms the presence of cross‐linkages, which prevent the anodic corrosion reactions. When compared to similar types of benzoxazines previously tested and reported, the corrosion resistance of the poly(CU‐ffa) coating shows better property [40,41] . This has been due to the presence of aliphatic core with 3d network structure.…”

Section: Resultsmentioning

confidence: 73%

“…Table 3 lists the highest R ct and R f values that could be obtained for mild steel specimens coated with poly(CU‐ffa). The enhanced corrosion resistance behavior provided by benzoxazine coatings may be attributed due to their cross‐linked network structure and polar nature, which promotes effective adhesion over metallic substrates [38–40] . The poly(CU‐ffa) matrix has a lower roughness factor value (n), which also supports the removal of pores and cavities on the steel surface.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Sustainable Curcumin‐Based Bio‐benzoxazines for Antimicrobial and Anticorrosion Applications

et al. 2023

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In the current study, three novel bio‐based benzoxazines were produced from curcumin (CU), which reacts individually with three different primary amines such aniline (a), furfurylamine (ffa) and octadecylamine (oda) under suitable experimental conditions. FTIR and 1H‐NMR spectra were used to confirm the molecular structure of synthesized curcumin based benzoxazine monomers (CU‐a, CU‐ffa and CU‐oda). It was found that the curing temperatures of the three benzoxazine monomers, CU‐a, CU‐ffa, and CU‐oda are 207 °C, 193 °C, and 199 °C respectively. According to theromogravimetric analysis (TGA) analysis, cured poly(CU‐a), poly(CU‐ffa), and poly(CU‐oda) have remaining char yields of 78, 77, and 55 %, respectively, and their corresponding limiting oxygen index (LOI) values are 49, 48, and 40, respectively, confirming that they have exceptional thermal stability and flame‐retardant qualities that are ideal for applications. The value of water contact angle of poly(CU‐a), poly(CU‐ffa) and poly(CU‐oda) are 131°, 135° and 137° respectively, which infer their excellent hydrophobicity. Results from corrosion and anti‐microbial studies ascertain that these curcumin based benzoxazines can be considered as efficient coating materials to protect the surfaces of mild steel specimen under adverse environmental conditions. Using density‐functional theory (DFT) band gap of the monomers has been calculated and found that CU‐a possesses the lower value of band gap of 2.9212 eV than other benzoxazines.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Sustainable Curcumin‐Based Bio‐benzoxazines for Antimicrobial and Anticorrosion Applications

et al. 2023

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“…[42][43][44] In this context, development of sustainable bio-based benzoxazine materials from renewable resources having excellent hydrophobic properties, high thermal stability, and low curing temperature is appropriate. 36,[45][46][47][48] Up to now, various bio-based benzoxazines have been produced using bio-phenols such as cardanol, eugenol, guaiacol, vanillin, thymol, and so on. [49][50][51][52][53][54][55][56][57] The studies related to sesamol-based benzoxazine are considered to be at an early stage and only a few reports are found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Sesamol-based polybenzoxazines for ultra-low-k, high-k and hydrophobic coating applications

et al. 2023

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“…Polybenzoxazines can also be effectively used as anti‐fouling coatings on the ships and sub‐marines because of their corrosion resistant behavior. Recently, our research group have developed various bio‐composites of polybenzoxazines intending to utilize them for different industrial uses such as oil water separation, sound absorption, corrosion resistance, thermal, and dielectric applications 27–30 …”

Section: Introductionmentioning

confidence: 99%

“…Recently, our research group have developed various biocomposites of polybenzoxazines intending to utilize them for different industrial uses such as oil water separation, sound absorption, corrosion resistance, thermal, and dielectric applications. [27][28][29][30] As stated earlier, even though polybenzoxazine composites have exhibit an excellent thermal stability, mechanical strength, and dielectric properties, they are still developed form various petroleum sources as bisphenol-A. To avoid or minimize the usage of petroleum based raw materials, environmentally sustainable materials are needed for the development of polybenzoxazine bio-composites.…”

Section: Introductionmentioning

confidence: 99%

Structure, thermal, hydrophobic, and dielectric properties of Bermuda grass ash bio‐silica, SBA‐15, and rGO‐reinforced bisphenol‐BA‐based polybenzoxazine composites

Srinivasan

Krishnan

Arumugam

et al. 2023

J of Applied Polymer Sci

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The present work deals with the development of bisphenol‐BA based benzoxazines and to study their behavior toward utilization for thermal, high‐dielectric, low‐dielectric, and anti‐corrosion applications. A new type of bifunctional benzoxazine resins were synthesized using bisphenol‐BA with different types of amines and characterized using FTIR, 1H‐NMR spectra, DSC, and TGA techniques. In the present study, thermally stable bisphenol‐BA with trifluoromethylaniline benzoxazine (BBA‐tfma) and bisphenol‐BA with furfurylamine benzoxazine (BBA–ffa) were selected as matrices for the preparation of composites with SBA‐15, bio‐silica (from Bermuda grass) and reduced graphene oxide. The results indicated that the poly(BBA‐tfma) with 5 wt% SBA‐15 composites and poly(BBA‐ffa) with 10 wt% bio‐silica composites showed the lowest dielectric constant value of 1.71 and 1.87, respectively. While in contrast, the 5 wt% of reduced graphene oxide (rGO) reinforced poly(BBA‐tfma) exhibits highest value of dielectric constant (k = 8.49). Results from corrosion studies ascertain that the bisphenol‐BA with aminoethoxyethanol benzoxazine, that is, poly(BBA‐aee) possess better mild steel corrosion protection behavior than that of other benzoxazines. Data resulting from different studies indicate that the bisphenol‐BA‐based benzoxazines and their composites can be effectively used for different industrial applications.

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Fully Bio-based Polybenzoxazines Derived from Thymol: Thermal Stability, Hydrophobicity and Corrosion Resistant Properties

Cited by 25 publications

References 32 publications

Synthesis and Characterization of Sustainable Curcumin‐Based Bio‐benzoxazines for Antimicrobial and Anticorrosion Applications

Synthesis and Characterization of Sustainable Curcumin‐Based Bio‐benzoxazines for Antimicrobial and Anticorrosion Applications

Sesamol-based polybenzoxazines for ultra-low-k, high-k and hydrophobic coating applications

Structure, thermal, hydrophobic, and dielectric properties of Bermuda grass ash bio‐silica, SBA‐15, and rGO‐reinforced bisphenol‐BA‐based polybenzoxazine composites

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