Inorganic-organic hybrid pigments based on carminic acid and clay minerals
Source abstract
Abstract
Abstract Hybrid pigments based on carminic acid (CA) stabilized by clay minerals have been prepared. Three different pathways were used: CA@saponite; CA@Al-pillared saponite; and hydrogels of saponite-CA or montmorillonite-CA covered by polyorganosilane (POS). Pigments were characterized by a set of different techniques including X-Ray diffraction (XRD), transmission electron microscopy (TEM), infrared spectroscopy (FTIR), solid state nuclear magnetic resonance (NMR) and time-resolved fluorescence (TRF) spectroscopies. The color parameters, i.e., L*a*b*, were measured. In addition, the photostability of the samples under visible light was evaluated. The results showed that CA@PilSap presented a greater stability compared to CA@Saponite. The pigments obtained from hydrogels presented the greatest light stability due to the coverage with POS that acts as a protective layer.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Pigment Synthesis and Properties · Cultural Heritage Materials Analysis · Dyeing and Modifying Textile Fibers
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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