INFLUENCE OF TEMPO-MEDIATED OXIDATION ON DIFFERENT FIBER FRACTIONS OF TMP
The fiber fractions - R14, R28, R48, R100, R200, were selectively oxidized by TEMPO-mediated system respectively in this paper. The chemical components of oxidized fiber fractions, including extractives, lignin and holocellulose contents, were similar although they decreased remarkably compared with the untreated ones. Similar trend was also found that the carboxyl contents of oxidized fiber fractions were around 380 mmol/kg, which was only 50 mmol/kg for untreated ones. However, the fiber length and curl index of the oxidized long fibers, analyzed by FQA, decreased sharply, especially for R14 and R28, leading to a higher increase in tensile and burst strength compared with R100 and R200. The decrease of intrinsic fiber strength of long fibers was lower than that of short fibers, resulting in the drop of tear strength for all the fractions. However, the TEMPO-mediated oxidation on long fibers should be a novel way for TMP enhancement.
fiber fractions thermomechanical pulp TEMPO-mediated oxidation carboxyl content
Ma Pu Zhai Huamin Kwei-Nam Law Claude Daneault
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University,Nan Centre intégré en Pates et Papiers, Université du Québec à Trois-Rivières, G9A 5H7, Canada
国际会议
广州
英文
297-301
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）