A disinfectant wipe dispenser is provided comprising a container having first and second compartments, the first compartment being dimensioned to store a supply of wipes in use; and, separated by a baffle including one or more channels communicating between the compartments. The first compartment has an outlet through which wipes may be successively drawn; and, the second compartment is dimensioned to receive one or more portions of a disinfectant composition comprising a peroxy activator, a peroxy compound and optional further excipients, selected so that addition of the dosage form to a predetermined quantity of water produces a disinfectant solution containing peracetic acid at a concentration of at least about 1000 ppm. The channels communicate between the compartments and allow flow of water and aqueous disinfectant between the compartments, and have a maximum dimension configured to prevent movement of particles of disinfectant sediment from the second compartment to the first compartment.
Solid disinfectant dosage forms having a peroxy activator and a peroxy compound are provided. The dosage form can be selected so that addition of the dosage form to a predetermined quantity of water produces a disinfectant solution containing peracetic acid in a concentration of at least about 1000 ppm. The dosage form can include a colour indicator arranged to provide a first colour signal when the concentration of peracetic acid is lower than about 1000 ppm and a second colour signal when the concentration is higher than about 1000 ppm and a third colour signal when the concentration falls below about 1000 ppm. The peroxy compound can be selected from the group consisting of sodium percarbonate, ammonium persulphate, calcium percarbonate, magnesium percarbonate, sodium perborate, sodium persulfate, sodium perphosphate and mixtures thereof.
Establishment of an activated peroxide system for low-temperature cotton bleaching using N-[4-(triethylammoniomethyl)benzoyl]butyrolactam chloride
作者:Changhai Xu、David Hinks、Chang Sun、Qufu Wei
DOI:10.1016/j.carbpol.2014.11.054
日期:2015.3
Cotton bleaching is traditionally carried out in strongly alkaline solution of hydrogen peroxide (H2O2) at temperatures close to the boil. Such harsh processing conditions can result in extensive water and energy consumptions as well as severe chemical damage to textiles. In this study, an activated peroxide system was established for low-temperature cotton bleaching by incorporating a bleach activator, namely N-[4-(triethylammoniomethyl)benzoyl]butyrolactam chloride (TBBC) into an aqueous H2O2 solution. Experimental results showed that the TBBC-activated peroxide system exhibited the most effective bleaching performance in a pH range of 6-8 which could be approximated by adding sodium bicarbonate (NaHCO3). The TBBC/H2O2/NaHCO3 system led to rapid bleaching of cotton at a temperature as low as 50 degrees C. In comparison with the hot alkaline peroxide bleaching system, the TBBC/H2O2/NaHCO3 system provided cotton fabric with an equivalent degree of whiteness, higher degree of polymerization, and slightly lower water absorbency. The new activated peroxide system may provide a more environmentally benign approach to cotton bleaching. (C) 2014 Elsevier Ltd. All rights reserved.