Controlling supermolecular structures and improving colorfastness in cotton fibers

Facilely Synthesized, Highly Permeable, and Efficiently Recyclable Polycationic Gel with Cohesive State Transformations for Purifying Dyeing Wastewater

“…First, the absorption effects of PPG absorbents by the different absorption time were carried out as the following experimental processes: 0.01 g of the PPG absorbents were mixed with 50 mL of the 100 mg/L dye solution under magnetic stirring, and the absorption interactions were run for 0.5–4 h. The absorption solutions at a corresponding absorption time of 0.5–4 h were filtered to detect the absorption effects at each absorption time interval ( t ). As described in detail in a previous series works, − the dye concentration in the solution ( C t ), the dye removal percentage ( R %), and the amount of dye absorption ( q t ) at time t could be measured and calculated by a spectrophotometer technique. The absorption data at time t were used to fit the absorption kinetics models to investigate the absorption kinetics behaviors of PPG absorbents.…”

“…Subsequently, the isotherm absorption experiments of the PPG absorbent toward a large-sized anionic dye of Reactive Scarlet 3BS were conducted as follows: 0.001–0.008 g of the PPG absorbents were mixed with 50 mL of the 100 mg/L dye solution of Reactive Scarlet 3BS under magnetic stirring to run the absorption interactions for 100 h. Subsequently, the absorption solutions were filtered to detect the absorption effects. As described in detail in a previous series works, − the concentration of the dye residue in the solution ( C e ), the dye removal percentage ( R %), and the equilibrium absorption capacity ( q e ) could be measured and calculated by a spectrophotometer technique.…”

“…In previous studies, the authors had discovered that a series of polycationic materials could be used as excellent absorbents for purifying the dyeing wastewater because their polycationic skeletons could produce efficient electrostatic attractions with the formation of ionic bonds (belonging to the chemical bonds) toward the colored anionic dyes in water during absorption. − Notably, it was interesting that the absorption capacity of a polycationic gel (PPG) [poly­(triallylmethyl ammonium chloride), PTAMAC] had been improved 368.27 times than that of activated carbon in the purification of dyeing wastewater . Moreover, compared to the previous absorbent materials, the preparation process of PPG absorbent was a facile polymerization.…”