The X-ray photoelectron spectroscopy (XPS) technique was used to study the reaction ofphenyl isocyanate and cellulose with different moisture contents (MC). The C1S XPS peak of cellulose isonly one symmetrical contrib...The X-ray photoelectron spectroscopy (XPS) technique was used to study the reaction ofphenyl isocyanate and cellulose with different moisture contents (MC). The C1S XPS peak of cellulose isonly one symmetrical contribution at 285.95 eV. While the C1S XPS peaks of N,N-dibenzylurea, thereaction resultant of phenyl isocyanate and water, have two contributions at 288.6±0.1 eV and 284.7±0.1 eV corresponding to the carbonyl group and phenyl ring group, respectively. Their area ratio isbetween 11.88 and 11.98 that is quite neat to the theoretical value of 12.0. With the moisture content (MC)of cellulose increased, the proportion of isocyanate reacted with water increased. When the MC reaches 9.78%, 92.98% of all consumed isocyanate will react with water. By spattering analysis, it reveals that thereaction resultants of benzyl isocyanate distribute mainly on the surface of cellulose.展开更多
文摘The X-ray photoelectron spectroscopy (XPS) technique was used to study the reaction ofphenyl isocyanate and cellulose with different moisture contents (MC). The C1S XPS peak of cellulose isonly one symmetrical contribution at 285.95 eV. While the C1S XPS peaks of N,N-dibenzylurea, thereaction resultant of phenyl isocyanate and water, have two contributions at 288.6±0.1 eV and 284.7±0.1 eV corresponding to the carbonyl group and phenyl ring group, respectively. Their area ratio isbetween 11.88 and 11.98 that is quite neat to the theoretical value of 12.0. With the moisture content (MC)of cellulose increased, the proportion of isocyanate reacted with water increased. When the MC reaches 9.78%, 92.98% of all consumed isocyanate will react with water. By spattering analysis, it reveals that thereaction resultants of benzyl isocyanate distribute mainly on the surface of cellulose.
