Epoxidized methyl ricinoleate bio-plasticizer with a pendant acetate ester for PVC artificial material : circumventing existing limit on achievable migration resistance / Siyu Pan in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 1 (Année 2019)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 1 (Année 2019) . - 10 p. Titre : Epoxidized methyl ricinoleate bio-plasticizer with a pendant acetate ester for PVC artificial material : circumventing existing limit on achievable migration resistance Type de document : texte imprimé Auteurs : Siyu Pan, Auteur ; Delong Hou, Auteur ; Haojun Fan, Auteur Année de publication : 2019 Article en page(s) : 10 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides gras Caractérisation Chlorure de polyvinyle Composés organiques -- Synthèse Epoxydation Esters méthyliques Huile de ricin et constituants Phtalates -- Suppression ou remplacement Plastifiants Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Processing polyvinyl chloride (PVC) artificial material requires plasticizer that softens the PVC coating. Currently, utilizing unsaturated fatty acid methyl esters to obtain epoxidized fatty acid methyl ester (EFAME) bio-plasticizers constitutes an environmentally responsible solution to substitute conventional ortho-phthalates that are endocrine disruptors or probable carcinogens. However, commercial EFAMEs, even with the highest epoxy value (ca. 5.5–5.8%) so far, still suffer from fast leaching from the PVC matrix, burdening the environment and shortening lifespan of the artificial material. Here, we report a proof-of-principle demonstration of a new strategy to obtain migration-resistant EFAME that harnesses the midchain hydroxyl of methyl ricinoleate and covalently attachment of a pendant acetate ester. Despite a low epoxy value (3.0%), the engineered bio-plasticizer displays significantly suppressed migration in multiple scenarios compared with one conventional EFAME with much higher epoxy value (5.8%). Circumventing the limit confronting previous strategy that highlights the sole contribution of epoxy value to achievable migration resistance, the rationale herein may provide guidance for designing new EFAMEs with comparable performance to ortho-phthalates, thus bringing the old and oft-maligned PVC artificial material industry one step closer to sustainability. Note de contenu : - Materials -Synthesis of epoxidized methyl ricinoleate with a pendant acetate ester (EMRA) - Preparation of plasticized PVC membranes - Characterization - Simulation details - Table 1 : Physicochemical parameters of EMRA and corresponding intermediates - Table 2 : Composition of MR, MRA, and EMRA identified by comparing the experimental mass spectra of the components in Fig. 3 against NIST08 mass spectral library DOI : https://doi.org/10.1186/s42825-019-0006-8 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0006-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36947 [article]

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Methods for determination of plasticizer migration from polyvinyl chloride synthetic materials : a mini review / Yi Chen in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 4 (Année 2022) . - 10 p. Titre : Methods for determination of plasticizer migration from polyvinyl chloride synthetic materials : a mini review Type de document : texte imprimé Auteurs : Yi Chen, Auteur ; Shuai Zhou, Auteur ; Siyu Pan, Auteur ; Dongfang Zhao, Auteur ; Jianshe Wei, Auteur ; Minzhong Zhao, Auteur ; Haojun Fan, Auteur Année de publication : 2022 Article en page(s) : 10 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de polyvinyle Cuir Essais (technologie) Evaporation Exsudation Extraction (chimie) Plastifiants Produits chimiques -- Migration Index. décimale : 668.9 Polymères Résumé : Plasticizer migration is responsible for premature coating failure in polyvinyl chloride (PVC) synthetic materials that continue to benefit our daily life as a reliable and cost-efficient simulant of genuine leather. In this context, the establishment of standard assays that measure the migration rate of plasticizers under varying scenarios plays a pivotal role in comparing durability of those PVC-derived leather-simulants. In this review, multiple methodologies developed over the last decade for determining plasticizer migration from PVC coating are compiled, with their operational principles, merits, and limitations being taken into consideration along with specific apparatus required for each. A concluding section discusses current challenges in this field, and highlights how nuclear magnetic resonance and computational simulation surpass conventional assays in yielding intercomparable results, and hence screening migration-resistant plasticizers in a labor- and time-saving way. Since migration resistance represents a decisive performance indicator of plasticizers, this systematic review may provide guidance to quite a few practitioners in PVC synthetic material industry, who are now engaged in validating various sustainable alternatives with performance allegedly equal to conventional but toxic di-(2-ethylhexyl) phthalate plasticizer. Note de contenu : - Test methods for plasticizer migration : Test methods for plasticizer volatilization - Test methods for plasticizer exudation - Test methods for plasticizer extraction - Table 1 : Methods currently available for determination of plasticizer migration from PVC synthetic materials DOI : https://doi.org/10.1186/s42825-022-00081-8 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-022-00081-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37576 [article]

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