CAJ | 학술논문

为提高木质素添加剂的稳定性和分散性，采用分离提纯、复配和化学改性对木质素进行改性。论述了3种改性方法的应用现状和优缺点，重点分析了氧化、磺化、缩聚、接枝共聚4种化学改性法。最后对木质素改性水煤浆添加剂的发展趋势进行展望。结果表明：分离提纯和复配改性无法改变木质素的结构和表面性能，对其在煤粒表面的吸附作用没有影响，且价格较高，缺乏市场竞争力。化学改性通过在木质素分子中引入有利官能团或去掉不利官能团，能从根本上改变分子结构，改善木质素分散性能，制备出性能优良的水煤浆。今后应根据煤种特性差异，深层研究木质素反应特征，采用化学改性技术对木质素结构进行调整，开发更多的化学反应途径，通过控制反应过程，合成一系列不同性能的木质素添加剂，提高木质素的煤种适应性，扩大木质素应用范围。
위제고목질소첨가제적은정성화분산성，채용분리제순、복배화화학개성대목질소진행개성。논술료3충개성방법적응용현상화우결점，중점분석료양화、광화、축취、접지공취4충화학개성법。최후대목질소개성수매장첨가제적발전추세진행전망。결과표명：분리제순화복배개성무법개변목질소적결구화표면성능，대기재매립표면적흡부작용몰유영향，차개격교고，결핍시장경쟁력。화학개성통과재목질소분자중인입유리관능단혹거도불리관능단，능종근본상개변분자결구，개선목질소분산성능，제비출성능우량적수매장。금후응근거매충특성차이，심층연구목질소반응특정，채용화학개성기술대목질소결구진행조정，개발경다적화학반응도경，통과공제반응과정，합성일계렬불동성능적목질소첨가제，제고목질소적매충괄응성，확대목질소응용범위。
To improve the stability and dispersion of lignin additive,the separation,purification,distribution and chemical modification methods were used to modify lignin.Discussed the advantages and disadvantages of the methods,mainly analyzed four chemical modification methods which were oxidation,sulfonation,condensation,graft copolymerization. Finally,the trends of development of lignin modified coal water mixture additives were prospected. The results show that separation-purification technology,compound technology which have no effects on the surface adsorption of coal,can not change the structure and surface properties of lignin.The above two methods also lack mar-ket competitiveness because of high cost.The chemical modification method by introducing favorable functional groups or removing unfavor-able functional groups in the lignin molecules,changes the molecular structure,improves disperstiveness,and modified product prepares coal water mixture with excellent performance.The reaction characteristics of lignin should be adjusted based on the coal properties.A series of additives can be compounded by controlling the reaction process.So the usable range of lignin can be expanded.