Adsorption and Rheology of Graphitic Carbon Black Nonaqueous Dispersions Prepared Using Nonionic Surfactants

Conductive Properties of Polyester/Spandex Fabrics Using Liquid Carbon Black and Disperse Black Dye

Carbon black (CB) has been widely used in many fields; because the color depth of CB is not as good as dyes, black depth and color fastness cannot meet the requirements of users. Therefore, the application of CB in the textile field is greatly restricted. For this purpose, in this paper, we prepared liquid DB@CB (disperse black dye (DB)-modified carbon black) using mixed milling of CB and DB (consisting of Disperse Blue 79, Disperse Orange 288, and Disperse Violet 93). Using the dip-dry-bake method, polyester/spandex fabrics with excellent color fastness, deep black color, and good electrical conductivity were prepared. The rheological properties and interactions of CB and DB were studied by rheometer and transmission electron microscopy (TEM), the effects of DB@CB concentration on fabric resistance and electrical conductivity were investigated, the properties of DB@CB dyed fabrics were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), and the stability and conductivity mechanism of liquid DB@CB were analyzed. The results showed that the liquid DB@CB was a pseudoplastic fluid based on strong intermolecular interaction by repulsive forces of CB and attractive forces of DB, improving the ordered arrangement and stability of CB and DB molecules. The liquid DB@CB showed a two-dimensional lamellar structure with a vortex-shaped helical molecular arrangement between CB and DB. The polyester/spandex fabrics dyed with DB@CB, had polygonal crystal structures and π-π* intermolecular interactions. It not only improved the conductivity of the fabric but also shows excellent color fastness, which can meet the application requirements of textiles and apparel for deep black, conductivity, and color fastness.

Branched macromonomers from catalytic chain transfer polymerisation (CCTP) as precursors for emulsion-templated porous polymers

Catalytic chain transfer polymerisation (CCTP) is combined for the first time with emulsion-templating to generate polyHIPE materials where functionality and rigidity can be tightly tailored, broadening their scope of application.

A facile fabrication of porous fluoro-polymer with excellent mechanical properties based on high internal phase emulsion templating using PLA as co-stabilizer

The stability of fluoro-high internal phase emulsion (fluoro-HIPE) systems and fluoro-polyHIPEs’ mechanical strength require further improvement to meet the requirements of future applications. In this study, we used polylactic acid (PLA) as a co-stabilizer to improve the stability of the fluoro-polyHIPE. The effects of concentration and molecular weight of PLA on the pores of the fluoro-polyHIPEs were investigated. The addition of PLA produced a porous material with narrower void size distributions, higher specific surface areas and enhanced mechanical properties compared to the fluoro-polyHIPE material without the additive. The resulting fluoro-polyHIPE showed smaller pore sizes (void diameters ranged from 1–3 μm) and an improved hydrophobic nature (contact angle can reach to 148.6°). The crush strength and Young's modulus values can reach 4.42 and 74.07 MPa, respectively, at a PLA addition of 25 wt% (oil phase composition), representing increases of 246% and 650% over fluoro-polyHIPE without PLA addition. The fluoro-poly-HIPE demonstrated excellent mechanical properties compared to many engineering foams, such as melamine, polystyrene, and even graphite foams. Improvements in the performance of porous fluoropolymer materials will be beneficial for many applications, such as chemical adsorption and separation, etc.

Effect of PLA on the stability of fluorinated-HIPE and size tuning of the resultant fluoro-polyHIPE with enhanced mechanical properties.