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Bolesław Szadkowski,Jacek Rogowski,Waldemar Maniukiewicz,Emmanuel Beyou,Anna Marzec 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
We present a strategy that leads to the formation of high-performance hybrid pigments made from naturalanthraquinone chromophores (alizarin, purpurin) and mineral supports (palygorskite (PAL), sepiolite(SEP), and hydroxyapatite (HAP)). Thanks to the mineral filler form features and the synergy between theorganic and inorganic components, the as-prepared hybrid pigments showed excellent thermal andchemical stability. The natural pigments exhibited strong pH-sensing activity, changing their color uponexposure to HCl and/or NH3 vapors. The PAL-based pigments were found to be the most effective pH indicators,showing pronounced color changes after 10 min of exposure to HCl (DE for PAL/A was 7.4). ToFSIMS,13C NMR and XPS techniques revealed interactions between the organic dyes and metal ions presentin the minerals. XPS spectroscopy was also used to examine the alterations in the structure of thehybrid colorants following exposure to acid vapors. The proposed pH sensors were successfully appliedto elastomer and thermoplastic elastomer matrices. The purpurin-based hybrid pigments exhibited significantlyreduced migration from the polymer (about six times lower concentration in ethanol after14 days). The results of this study pave a new way for the design, development, and application ofadvanced hybrid colorants with pH-sensing activity and improved stability.
Anna Marzec,Bolesław Szadkowski,Jacek Rogowski,Waldemar Maniukiewicz,Marcin Kozanecki,Dariusz Moszy nski,Marian Zaborski 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.70 No.-
In this paper a novel, simple method for synthesis of lake pigments based on 1,2-dihydroxyanthra-quinone dye and LDH carbonates was proposed. LDHs were modified with 1,2-dihydroxyanthraquinone,transforming the soluble dye into a new kind of hybrid lake. In result, the solvent resistance andphotostability of the chromophore were improved, which may be attributed to strong dye–LDHinteractions. TOF-SIMS technique was used for thefirst time to confirm the role of C14H7O4Mg+ andC14H6O5Al ions in the formation of the hybrids. Alizarin lakes have been recognized as a new class ofcolorants which demonstrated good color characteristics and chemical stability.