The
solubility of 2-mercapto-1,3,4-thiadiazol (MTD) in 13 pure
solvents including methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, s-butanol, n-pentanol, i-pentanol, acetonitrile, ethyl formate, methyl acetate,
and ethyl acetate was determined by a static gravimetric method at
temperatures ranging from 278.15 to 318.15 K under atmospheric pressure.
The results demonstrated that the experimental solubility of MTD increases
with the increase of temperature. The mole fraction solubility of
MTD in the solvent of methyl acetate was the highest and in acetonitrile
was the lowest. The experimental solubility data were correlated with
the Yaws model, the modified Apelblat model, the λh model, and the NRTL model. Relative average deviation (RAD) and
root mean square deviation (rmsd) were used to evaluate the fitting
degree of each model. The fitting results show that the NRTL model
fitted the solubility data best among all selected models (with RAD
= 0.0008, rmsd = 0.00005).
The surface properties of a commercial moso bamboo charcoal had been selectively modified by means of acidic treatment, using HNO3 with the concentrations of 17%, 34%, and 68% (w/w) respectively at 25°C for 8 hours. The iodine number, moisture content of all samples were tested, and the results showed that the iodine number of modified samples decreased slightly, while the moisture content increased sharply compared with raw sample, the sample modified with 68% HNO3 got the most remarkable change of above parameters. The Boehm titration、FTIR and SEM were also introduced to characterize the surface properties of raw and modified samples, the results revealed that the amount of surface functional groups, including various oxygen-containing and a few nitrogen-containing groups increased significantly of modified samples, the surface became more coarse and a large amount of fine fragment was yielded in pore space and vascular bundle of modified samples because of the corrosion behaviour of HNO3 in the modification process.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.