Fenton氧化预处理化学机械浆纤维表面及对其打浆能耗的影响

Oxidation Pretreatment of the Fiber Surface of Chemical Mechanical Pulp Using Fenton Reaction

采用大分子羧甲基纤维素(CMC)负载Fe2+催化剂对化学机械浆纤维表面进行芬顿氧化改性.通过扫描电子显微镜和能谱仪(SEM-EDS)分析了CMC吸附Fe2+催化剂的情况;通过测定纤维羧基含量以及分析纤维形态、比打浆能耗、零距抗张强度和抗张指数,探究了Fenton氧化预处理对纤维的形态、自身强度以及比打浆能耗和纸页抗张指数的影响.研究结果表明,经过Fenton表面氧化预处理后的纸浆纤维,其纤维形态和自身强度基本不受影响,与未经处理的原浆纤维相比,当打浆8000转时,Fenton表面氧化预处理后的纸浆纤维比打浆能耗下降31%,抗张指数提高18.1%.

The surface of chemical mechanical pulp was modified by Fe2+catalyst supported by CMC.The mechanism of Fe2+adsorption by CMC was analyzed with SEM-EDS.By measuring the content of carboxyl group in the fiber,analyzing the fiber form,specific beating energy consumption,zero-distance tensile strength and index,the influence of Fenton oxidation pretreatment on fiber form,strength,specific beating energy consumption and page tensile index was studied.The results showed that the fiber morphology and self-strength of the pulp fiber after the surface oxidation pretreatment with Fenton were basically unaffected.Compared with the untreated pulp fiber,when the pulp fiber’s surface pretreated with Fenton was beaten at 8000 r,the beating energy consumption of the pulp fiber was reduced by 31%and the tensile strength index was increased by 18.1%.