Lubricant controlled release silicone fouling release coatings based on mesoporous molecular sieves / Jinhua Lei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 703-711 Titre : Lubricant controlled release silicone fouling release coatings based on mesoporous molecular sieves Type de document : texte imprimé Auteurs : Jinhua Lei, Auteur ; Zhongzheng Li, Auteur ; Tian He, Auteur ; Zhuqian Wang, Auteur ; Shitao Yao, Auteur ; Huayu Qiu, Auteur Année de publication : 2023 Article en page(s) : p. 703-711 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption Caractérisation Lubrifiants Matériaux mésoporeux Revêtements -- Propriétés mécaniques Revêtements antisalissures Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Système de libération contrôlée (technologie) Tamis moléculaires Index. décimale : 667.9 Revêtements et enduits Résumé : Silicone fouling release coatings (FRCs) are biocide-free coatings, and their antifouling performance depends on the nonstick properties and the fouling release behavior. The antifouling performance can be further improved by introducing lubricant into such coatings to form lubricant-infused FRCs (iFRCs). The lubricant will be continuously released to the surface of iFRCs during use, and, in turn, on one hand, the surface of iFRCs will be updated; on the other hand, the attachment of mussels and other organisms will be affected. Inspired by the idea of drug release using porous materials, mesoporous molecular sieves (MMSs), including MCM-41 and SBA-15, were introduced into silicone FRCs in this paper because of their large specific surface area and pore volume. We expected that the release of lubricant could be controlled through MMS in the obtained coatings (iFRC-MMS), so as to obtain FRC with controllable antifouling performance, such as the long-term fouling prevention capacity. Since the release of lubricant usually takes a long time, the effect of MMS on the release of lubricant was studied by an accelerated release test in a good solvent. The surface performance, antifouling performance, and mechanical properties of iFRC-MMS have been studied through the static water contact angle (WCA) measurements, the antidiatom absorption test, and the mechanical performance tests, respectively. Our study demonstrated that: (1) the release of lubricant was indeed affected by MMS in iFRC-MMS as we expected, the release rate can be delayed to a certain extent by both MCM-41 and SBA-15, and (2) there was a compatibility relationship between the pore size of MMS and the molecular size of lubricant, (3) the release of the lubricant was also affected by the molecular weight of lubricant, (4) the intrinsic surface performance and fouling release performance of silicone FRCs were not affected by the introduction of MMS, while the mechanical properties of iFRC-MMS were slightly improved. Note de contenu : - MATERIALS AND METHODS : Reagents - Preparation of lubricant infused MMS (i-MMS) - Preparation of FRC with i-MMS (iFRC-MMS) - Characterization of the distribution of MMS in iFRC-MMS - Accelerated release test of lubricant - Performance tests of iFRC-MMS - RESULTS AND DISCUSSION : Lubricant absorption capacity of MMS - Distribution of MMS in iFRC-MMS - Effect of MMS on lubricant release from iFRC-MMS - Effect of the lubricant viscosity on lubricant release from iFRC-MMS - Effect of MMS on the surface performance of iFRC-MMS - Effect of MMS on the antifouling performance of iFRC-MMS - Effect of MMS on the mechanical properties of iFRC-MMS Table 1 : Mechanical properties of iFRC-MMS DOI : https://doi.org/10.1007/s11998-022-00702-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00702-1.pdf?pdf=button Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39313 [article]

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