多种漂白助剂协同下棉短绒浆粕过硫酸氢钾漂白工艺研究  

Research on the Bleaching Process of Cotton Linter Pulp with Potassium Peroxymonosulfate Combined with Bleaching Additives

作　　者：贾漫珂 刘钦 周子芸 张荣华 张昕 刘立明 周航旭 范金涛 JIA Manke;LIU Qin;ZHOU Ziyun;ZHANG Ronghua;ZHANG Xin;LIU Liming;ZHOU Hangxu;FAN Jintao(College of Biology and Pharmacy,Three Gorges University,Yichang,Hubei Province,443002;College of Materials and Chemical Engineering,Three Gorges University,Yichang,Hubei Province,443002;Hubei Jinhanjiang Refined Cotton Co.,Ltd.,Jingmen,Hubei Province,431900)

机构地区：[1]三峡大学生物与制药学院,湖北宜昌443002 [2]三峡大学材料与化工学院,湖北宜昌443002 [3]湖北金汉江精制棉有限公司,湖北荆门431900

出　　处：《中国造纸》2025年第3期112-121,共10页China Pulp & Paper

基　　金：国家自然科学基金项目(22076098)。

摘　　要：本研究选用过硫酸氢钾(PMS)为无氯氧化剂对棉短绒浆粕进行漂白研究。在确定工艺组成的基础上通过单因素实验优化工艺条件,成功制备白度超过83%且聚合度保持在2200左右的精制棉。采用多种表征手段对漂白前后的棉短绒浆粕官能团、晶型和形态进行对比分析。结果表明,PMS漂白过程主要去除纤维素上的有色物质,对纤维本身化学结构的影响较小。漂白助剂焦磷酸钠(PA)、三聚磷酸钠(PB)和十二烷基苯磺酸钠(SDBS)加入后显著提高羟基自由基(·OH)、硫酸根自由基(SO_(4)^(·-))、超氧自由基(O_(2)^(·-))和单线态氧(^(1)O_(2))等活性物种的信号强度,使漂白效果明显增强。淬灭O_(2)^(·-)和^(1)O_(2),白度均值降至62.7%、57.8%;淬灭^(1)O_(2),纤维素聚合度均值仍保持在2742,与未漂棉短绒浆粕相差较小。这表明自由基在漂白过程中起主要作用,其中影响白度的活性物种主要是O_(2)^(·-)和^(1)O_(2),而^(1)O_(2)对纤维素的降解作用最大。In this study,an environmental-friendly and high efficiency cotton short linter pulp bleaching process was developed with potassi-um peroxymonosulfate(PMS)as the major oxidant.Based on determining the process composition,the process conditions were optimized through single-factor experiments,cellulose with the degree of polymerization above 2200 and the whiteness reached 83%was successfully obtained.Many techniques were performed to measure the functional groups,crystal forms,and morphology of cotton short-staple pulp be-fore and after bleaching.The results showed that the PMS bleaching process could effectively remove the colored substance on the cellulose with less damage to the chemical and crystal structure and morphology of cellulose.In addition,the signal intensity of superoxide radical(O_(2)^(·-)),singlet oxygen(^(1)O_(2)),hydroxyl radical(·OH),and sulfate radical(SO_(4)^(·-))were detected increasing after the addition of sodium di-phosphate(PA),sodium triphosphate(PB),and sodium dodecylbenzene sulfonate(SDBS)as auxiliaries.The quenching of O_(2)^(·-)and^(1)O_(2)led the decrease of whiteness decreased by 62.7%and 57.8%,respectively.While the quenching of^(1)O_(2)made the polymerization degree kept around 2742.which was not different from the unbleached cotton linter pulp.These results showed that the radicals were involved in the bleaching process,and O_(2)^(·-)and^(1)O_(2)were the main active species affecting the whiteness of cotton linter pulp,and^(1)O_(2)had the greastet effect on the polymerization degree of cellulose.

关 键 词：精制棉 漂白 过硫酸氢钾 活性物种 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]