Natural polyhydroxy resins in surface coatings: a review

Kyei, Sampson Kofi; Eke, William Iheanyi; Darko, Godfred; Akaranta, Onyewuchi

doi:10.1007/s11998-021-00604-8

Cited by 10 publications

(5 citation statements)

References 130 publications

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“…Additionally, plasticizers and other additives (Figure 3) can be added to the biopolymers to achieve desirable properties in the edible films and coatings. Plasticizers are small molecules that are added to films and coatings to reduce brittleness and flaking or enhance flexibility or toughness [60]. Functional additives are essential participants of films and coatings because they enhance, for example, nutritional, health, and sensory properties, as well as antimicrobial and antioxidant activity, which will be discussed in the next chapter.…”

Section: Lipid-based Coatingsmentioning

confidence: 99%

Progress in Fruit and Vegetable Preservation: Plant-Based Nanoemulsion Coatings and Their Evolving Trends

Cvanić,

Šovljanski,

Popović

et al. 2023

Coatings

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Innovative technologies in the food industry are focused on integrated approaches to improve the sustainability of the food system that cover the whole supply chain. Huge post-harvest losses of fruits and vegetables and the use of synthetic chemical preservatives for this purpose are a matter of grave concern for any country. High demands for safe and healthy food have contributed to maximizing efforts to investigate post-harvest technology. Since fruits and vegetables are extremely perishable foods, they require the best post-harvest methods to maintain their storage stability and increase shelf-life. A solution for this emerging problem was found in the application of nanoemulsion edible coatings, described as thin-layered edible coatings or films with the possibility to provide additional benefits such as antioxidant and antimicrobial properties. These coatings provide protection against moisture loss, respiration, gaseous exchange, microbial spoilage, etc., offering promising results to safeguard the physicochemical during the time of storage and transportation of fruits and vegetables. This review summarizes the newest studies of nanoemulsion coatings on fresh products, providing valuable information regarding preparation and application methods and applied polymers and bioactives. Moreover, it gives a detailed description of the influence of nanoemulsion coating application (shelf-life, weight loss, colour, etc.) on fresh fruits and vegetables during storage.

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Section: Lipid-based Coatingsmentioning

confidence: 99%

Progress in Fruit and Vegetable Preservation: Plant-Based Nanoemulsion Coatings and Their Evolving Trends

Cvanić,

Šovljanski,

Popović

et al. 2023

Coatings

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“…It has been manifested that natural polyhydroxy monomers derived from bio-based raw materials are readily available, low cost and exhibit excellent impact strength, flexibility, adhesion, chemical and water resistance performance when applied to EPs. 26,27 Sorbitol is a renewable sugar alcohol from naturally occurring materials with good oxygen permeability, environmentally friendly, and plasticizing ability substance. 28 Inositol is present in many plants and animals, and has an abundant source in rice bran.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of our knowledge, various biological resources such as lignin, 21 vegetable oil, 22 tannins, 23 epoxidized soybean oil, 24,25 and so forth, have been attempted to fabricate EP modifiers. It has been manifested that natural polyhydroxy monomers derived from bio‐based raw materials are readily available, low cost and exhibit excellent impact strength, flexibility, adhesion, chemical and water resistance performance when applied to EPs 26,27 . Sorbitol is a renewable sugar alcohol from naturally occurring materials with good oxygen permeability, environmentally friendly, and plasticizing ability substance 28 .…”

Section: Introductionmentioning

confidence: 99%

Toughening modification of epoxy resins by epoxy‐terminated hyperbranched polyethers fabricated by doping sorbitol with inositol

Niu

et al. 2023

J of Applied Polymer Sci

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Increasing social awareness concerning the design of excellent performance toughening agents to curb the adverse effects of insufficient toughness on the wide range of applications of epoxy resin (EP). Herein, a small amount of sorbitol was doped into carbocyclic inositol as a core monomer, and bisphenol‐A and epichlorohydrin were used to produce epoxide‐terminated hyperbranched polyether by one‐pot preparation method. After that, the prepared polymer was used as modifier to improve the toughness and strength of petroleum‐based EPs. Results demonstrated that after adding the homemade epoxy‐terminated hyperbranched polyether (EHBPE) to the EP, the polyether prepared with the ratio of sorbitol and inositol displayed significant advantages compared with the polyether with monomers using only sorbitol and inositol, respectively. In particular, the impact, and tensile strengths of EHBPE‐IS/EP cured sample with EHBPE‐IS loading at 20% were increased by 197.5%, 139.6%, respectively, compared with those of neat EP. In brief, EHBPE‐IS, a member of the family of EHBPEs, provided a facile method for the preparation of bifunctional modifier for tough and strong EP with promising industrial applications.

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“…Phenolic resins are the most significant thermosetting resins produced via acid-or basecatalyzed polycondensation of formaldehyde and phenolic compounds [1][2][3]. Because of their excellent heat properties, strong mechanical strength, water resistance, heat resistance, and chemical stability [4,5], these resins have been extensively applied in many applications like automotive, aerospace, varnishes for wood, adhesives, phenolic foam, and surface coatings [6][7][8][9]. Because of all these important properties and the wide spectrum of various applications, it is not surprising that a great number of studies and research have been conducted to incorporate structural modifications [10] using other aldehydes or different phenols [11] or adding different additives [12] to acquire new resins having new properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Modification and Characterization of New Phenolic Resins linked to Tetrabromophthalimide

Hasan

Al-Azzawi

2023

Iraqi Journal of Science

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The present work aimed to synthesize new phenol resins via incorporation of structural modification through introducing new phenolic compounds containing cyclic imide moiety in reaction with formaldehyde. The synthesis of these new resins involved three steps. First, one of the three N-(hydroxyphenyl)tetrabromophtalamic acids 1-3 were processed via a reaction between tetrabromophthalic anhydride and aminophenols. Amic acids 1-3 were dehydrated in the second step by smelting, producing the identical N-(hydroxyphenyl)tetrabromophthalimides 4-6. The new imides represent the new phenolic component that was presented in condensation reaction with formaldehyde in the third step, creating the target phenolic resins 7-9. The work also involved curing the new resins through esterification of phenolic OH groups by treatment with benzoyl chloride. The chemical structures of prepared compounds were confirmed according to FT-IR, 1H NMR, and 13C NMR spectral data. As a conclusion, the present work supply of new phenolic resins and the presence of the cyclic imide (tetrabromophthalimide) moiety in their structures exhibit high softening points and resistance to solubility, which fit with some applications, while subsequent curing through esterification exhibits better solubility and lower softening points, which fit with other applications.

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Natural polyhydroxy resins in surface coatings: a review

Cited by 10 publications

References 130 publications

Progress in Fruit and Vegetable Preservation: Plant-Based Nanoemulsion Coatings and Their Evolving Trends

Progress in Fruit and Vegetable Preservation: Plant-Based Nanoemulsion Coatings and Their Evolving Trends

Toughening modification of epoxy resins by epoxy‐terminated hyperbranched polyethers fabricated by doping sorbitol with inositol

Synthesis, Modification and Characterization of New Phenolic Resins linked to Tetrabromophthalimide

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