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Encapsulation of phthalocyanine pigments onto hyperbranched polyesters (HBPs) is reported for in situ printing ellulosic fabrics. The encapsulation was developed through liquid‐phase separation method approached using various functional hydroxyl groups in HBPs; generation 2 (HBPs16) and generation 4 (HBPs64). The HBPs‐encapsulated pigment was characterized with thermal gravimetric analysis, environmental scanning/transmission electron microscope, Fourier transform infrared spectroscopy, dynamic light scattering, X‐ray diffraction pattern, and contact angle analysis. The characterization demonstrated the successful encapsulation of phthalocyanine pigments into HBPs. It was shown that the encapsulated pigments improved the pigment print fixation on cellulosic fabrics immediately in one step and decreased the requested amount of the binder and fixation temperature relative to the control sample. The color strength and light fastness were greatly influenced by the generations of hyperbranched polyesters. [ABSTRACT FROM AUTHOR]

Aqueous dispersions of citric-acrylate (CAC) oligomer encapsulating C.I. Pigment Blue 15:3 (PB15:3) in the presence of glutaraldhyde were formulated using the phase separation method. FT-IR spectroscopy and centrifuge sedimentation are performed to confirm the encapsulation of pigment into CAC oligomer. The prepared capsules were characterized using thermal gravimetric analysis (TGA) and transmission electron microscope (TEM). The results revealed that the encapsulated pigment had a profound multifunctional impact and minimized the driving force of pigment printing on the cellulosic fabrics. Besides, the encapsulated pigment accelerated the pigment fixation on cellulosic fabrics without drying in one step and reduced the required amount of the binder, compared with the control sample. Furthermore, the printed fabrics exhibited good antibacterial performance against both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). The presence of the crosslinker could be stabilized the encapsulated pigment on the cellulosic fabrics. Moreover, the light and washing fastness for the printed fabrics using encapsulated pigment are higher than that in case of using control samples. [ABSTRACT FROM AUTHOR]

UV-curable hyperbranched polyester acrylate is formulated for encapsulation of phthalocyanine pigments using liquid-phase separation method. The encapsulated pigments were used as a UV-curable binder incorporated the pigment colours to eliminate the solid content, slow dry rate and hardness of conventional UV curable systems. Thermal gravimetric analysis (TGA), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and X-ray diffraction pattern (XRD) were examined in details. The characterization demonstrated the successful encapsulation of phthalocyanine pigments via UV-curable hyperbranched polyester acrylate. Thermal gravity analysis indicates that the encapsulated pigment films have better thermal stability than the pure pigments. The roughness and colour fastness to rubbing, washing, and light of the printed fabrics by encapsulated pigment, were compared to the same fabrics printed by conventional pigment printing using the UV curable formulation system with the linear counterpart of polyester acrylate as well as the conventional UV curable binder. The results showed that the printed samples with encapsulated pigment displayed the highest colour strength compared with the conventional printed samples. Additionally, the UV-curable hyperbranched polyester acrylate can be cured by short exposure to UV light and eliminate the surface roughness effect of UV curable system, decreased the solid content which increased the durability properties, rubbing and washing of printed fabrics. Image 1 • UV-curable hyperbranched polyester acrylate incorporated the pigment colours. • This process eliminates the drawbacks of conventional UV curable systems. • The printed samples acquired colour durability compared to conventional UV curable systems. • This work meet the wearability and comfort requirements for pigment printing of textiles. [ABSTRACT FROM AUTHOR]

• Organic pigment coated with titania for attaining good UV-shielding properties. • Hyperbranched polyester-Stabilized Phthalocyanine Pigments Coated with Titania. • Titania shells of pigment gave an efficient UV shielding property on cellulosic fabrics. • Level of UV protection relies on the numbers of terminated hydroxyl groups in HPBs. • Long term durability of UV protection throughout washing and light exposure. This study approached a convenient method for the organic pigment coated with titania for attaining good UV-shielding properties. Hyperbranched polyesters (HBPs) included various HBPs; generation2 (HBPs16) and generation 4 (HBPs 64) are formulated for encapsulation of phthalocyanine pigments using liquid-phase separation method. The encapsulated pigments are then coated by titania via sol-gel process from n-butoxide (TBOT).Thermal gravimetric analysis (TGA), scanning/transmission electron microscope (SEM/TEM), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), X-ray diffraction pattern (XRD), and zeta potential analysis were examined to illustrate the coating performance of titania. The stabilized coated pigment nanocomposites are used for printing of cellulosic fabrics. UV shielding property of the pigment prints was systematically investigated. It is further demonstrated that the obtained titania shells of pigment prints can serve as an efficient protection against UV light and could obviously enhance the UV shielding property. The degree of protection depends on the numbers of functional hydroxyl end groups in hyperbranched polyesters. Besides, the titania coated pigment has no noticeable effect on the driving force for acceleration of pigment printing process under the unfavourable conditions. [ABSTRACT FROM AUTHOR]