Yanjun Xing

Dyeing of PET yarn in supercritical carbon dioxide can reduce water usage, prevent pollution and save energy. Effects of supercritical conditions on the uniformity of PET package were investigated with a pilot plant. It was found that the uniformity of PET package is improved as the CO2 flow rate increasing. The dyeing process with optimum flow reversal yield more uniform

The extraction of perrhenate with 25,26,27,28-tetrakis[(ethoxycarbonyl)methoxy]-p-tert-butylcali x[4]arene ( L) into 1,2-dichloroethane was investigated. The presence of Na+ in the aqueous phase is necessary for the extraction. The extraction equilibrium has been established and the thermodynamic quantities ?H°, T?S° and log Kex are -61.3 kJ/mol, -41.4 kJ/mol and 3.69, respectively. The effect of diverse ions on the extraction of ReO4- was

The extraction of indium(III) with 25,26,27,28-tetrakis[(ethoxycarbonyl)methoxy]-p-tert-butylcalix[4]arene (L )i nto 1,2dichloroethane was investigated. The presence of Na + and Br − in the aqueous phase was necessary for the extraction. The study showed that the In(III) was extracted by forming an ion-pair compound of [NaL + ][InBr − ]. The effect of competing ions on the extraction of In(III) was examined.

A low temperature and cost-effective process for antimicrobial finishing of cotton textiles has been developed by sol–gel method. The antimicrobial treatment was performed by treating cotton textile with silica sols from water glass and then with silver nitrate solution. The antimicrobial activity was determined by using E. coli as a model for Gram-negative bacteria. The results showed that the treated textile

ABSTRACT Nine polycarboxylic acids (PAs) were employed in silica sol to offer an alternative approach in improving washing durability of the hydrophobic cellulose fabric by the sol−gel method. Polycarboxylic acids played a twofold role since they work not only as catalysts in hydrolyzing silica precursor but more importantly as cross-linkers to bind silica coating to cellulose substrate. Washing durability of hydrophobic cellulose fabric finished by the sol−gel method was obviously enhanced. The polycarboxylic acid with the proper number of carboxylic acid groups and distance between the terminal carboxylic acid groups could enhance the washing durability of the hydrophobicity of the cotton fabric by the sol−gel method. 1,2,3,4-Butanetetracarboxylic acid (BTCA) led to the best durability of hydrophobic cellulose fabric with a water contact angle of 138.6° (recovery percentage 96.5%) after washing 30 times. The effect of BTCA on durability was also characterized by scanning electron microscopy (SEM). This study suggested that the organic−inorganic sol−gel hybrid using PA as a catalyst is appropriate for achieving a durable hydrophobic cellulose fabric.

Superhydrophobic surfaces have been successfully prepared by sol–gel method using water glass as starting material. Such surfaces were obtained first by dip-coating the silica hydrosols prepared via hydrolysis and condensation of water glass onto cotton substrates, ...