表面活性剂Tween 80对麦草浆次氯酸盐漂白的影响

Effects of Surfactant Tween 80 on Enhancing Hypochlorite Bleaching of Wheat Straw Soda Pulp

研究了聚氧乙烯山梨醇酐单油酸酯(Tween80)对麦草烧碱浆次氯酸盐漂白的助漂作用。对次氯酸盐与Tween80同时漂白、次氯酸盐漂白后再用Tween80后处理以及Tween80预处理加次氯酸盐漂白(分别以H/T、HT和TH表示)三种不同组合的漂白方式对纸浆白度、粘度及主要强度指标的影响进行了综合比较,结果发现Tween80在HT漂序中的助漂效果较好。在HT漂白中,当Tween80的用量为0.8%时,漂白浆的白度增加最多,粘度虽然有所下降,但仍大于对照次氯酸盐漂白浆,其抗张强度也较好,撕裂强度基本不变,但耐破和耐折强度有不同程度的下降。

The effect of surfactant Tween 80 on hypochlorite bleaching of wheat straw soda pulp was investigated. Compare to the bleaching processes of hypochlorite（H）, hypochlorite together with Tween 80（H/T）, Tween 80 treatment before（TH） and aiter hypochlorite（HT）, it shows that the best result can be obtained by HT sequence. When the dosage of Tween 80 is 0.8%, the whiteness of HT bleached pulp exceeds 75% SBD, while the viscidity is still higher than controlled H bleached pulp. Compared to with the controlled H bleaching pulp, tensile strength of HT bleaching pulp is higher, and bursting strength is almost as the same, however, tearing strength and folding endurance are lower.