Anionic waterborne polyurethane dispersions from maleated cotton seed oil polyol carrying ionisable groups

Cellulose nanocrystals reinforced environmentally-friendly waterborne polyurethane nanocomposites

“…In this way, the ionic groups form an electrochemical double layer with TEA counter ion conferring stability to the dispersion (Bullermann, Friebel, Salthammer, & Spohnholz, 2013). In general, small particles favor the formation of thicker double layers, attributable to the effectiveness of the conformed structures, leading to more stable systems (Gaddam & Palanisamy, 2016). Thereby, considering the small particles obtained, the synthesized WBPU resulted visually stable over six months, presenting no evidences of agglomerations, and showing a pH of 8.6.…”

Ionizable polyol from cottonseed oil for anionic waterborne polyurethane-silanol dispersions

“…Synthesis of HCSO proceeded through the epoxidation of CSO followed by in situ epoxy ring opening, according to the method described in a previous work. 18 Briefly, after attaining the maximum epoxy value in ECSO synthesis described above, the temperature of the reaction mixture was raised to 90°C and the reaction was continued for another 15 h, at which point oxirane content had dropped to a minimum value. After that, the reaction mixture was cooled to room temperature and dissolved in ethyl acetate and washed with distilled water and brine solution.…”

“…In our ongoing research especially focused on the design of vegetable oil-based ionic soft segments, a series of investigations has already been reported in the synthesis of novel well-defined ionic soft segments derived from cottonseed oil, as renewable monomers for PUD manufacturing. 18,19 In the present study, we discussed the synthesis of a novel CSO based ionizable polyol and its application as an ionic soft segment in waterborne PUD preparation. A series of mixed polyols with varying OH values resulted from the blending of an ionizable polyol with HCSO in different fractions.…”

Graphitic carbon nitride (g‐C3N4) reinforced polymer nanocomposite systems—A review

“…Polyurethane (PU) is an important and very useful commercial polymer that can be prepared via polyaddition reaction between a diisocyanate and a petro‐based macro diol or a renewable polyol. PU's have attracted considerable attention due to their potential broad applications such as coatings, adhesives, sealants, elastomers, and foams . However, conventional PU's are mostly linear thermoplastics and have poor surface, thermomechanical, and barrier properties.…”