Polymer-encapsulated phthalocyanine green aluminum pigment was prepared via inorganic acid radical/ radical polymerization route, and its properties were investigated by FT-IR, TGA, XPS, SEM, and TEM. SEM and TEM images showed that the aluminum pigment was encapsulated by a thin film of polymer which ensured good anti-corrosive performance in alkaline (pH 12) and acidic (pH 1) mediums. XPS results showed significant chemical shifts, and increase in binding energies to higher levels after raw aluminum pigment was phosphate coated and colored by phthalocyanine green pigment. TGA results suggest a marginal reduction in its thermal stability. Major absorbance peaks, such as aluminum phosphate (AlPO 4 ), different monomer units and CH 2 stretching vibration of phthalocyanine green G were highlighted in the FTIR spectra of the colored aluminum matrix. The polymer-encapsulated aluminum pigment (PAP) had excellent UPF properties regardless of the coating thickness, but the handle of the fabric was affected when the coating thickness increased beyond 0.04 mm. The prepared pigment showed excellent rubbing and washing fastness, but its handle and color strength were compromised when the content of monomer ratio by 100 % weight of PGAP increased beyond 10 %, was applied on cotton fabrics. This research provides a simple but effective route for the preparation of polymer-encapsulated aluminum pigments for waterborne textile applications.
In this study, amphiphilic starch prepared by phosphorylation and octenylsuccinylation is surveyed to identify its effect on the adhesion of starch to cotton/polyester blend fibers at different temperature. Acid‐thinned cornstarch (ATS) is phosphorylated and octenylsuccinylated with pentasodium triphosphate and 2‐octenylsuccinic anhydride, respectively, to improve upon adhesion to cotton/polyester blend fibers. Two series of amphiphilic starch samples with different levels of the substitution (DS) are derived for determining desirable level of starch modification in sizing. Amphiphilic starch paste shows strong adhesion to cotton/polyester blend fibers than ATS paste. It is found that the modification reduces the crystallinity, changed the morphology, improves moisture regain, alleviates the adverse influence of starch retrogradation, and improves adhesion to fibers and desizing efficiency. The adhesion of amphiphilic starch paste to cotton/polyester blend fibers at 60 °C is statistically higher than adhesion of ATS at 95 °C. The amphiphilic starch with a total DS of 0.06 shows the highest potential use for strong cotton/polyester blend warp sizing due to its good sizing properties.
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