CAJ | 학술논문

采用超滤方法对木质素磺酸钠进行分离得到3种不同分子量级份。采用凝胶渗透色谱、紫外光谱、电位滴定等方法研究各级份的结构特征及其对分散染料性能的影响。结果表明，随着分子量的增加，木质素磺酸钠颜色加深、纯度提高，分子结构中愈创木基含量增多，酚羟基、磺酸基和羧基的含量降低；高分子量木质素磺酸钠对分散染料具有更优的分散性和高温稳定性，染料上染率也随其分子量的增大而增加，且当木质素磺酸钠浓度较高时，分子量增大，对纤维沾污减弱。木质素磺酸钠对染料的还原破坏作用与分子量和酚羟基含量有关，采用截留分子量大于2.5×103的膜提纯的木质素磺酸钠级份对染料还原性最低，还原水解率由未提纯时的26.0%降为6.9%，且该级份木质素磺酸钠具有最优的匀染性能。
채용초려방법대목질소광산납진행분리득도3충불동분자량급빈。채용응효삼투색보、자외광보、전위적정등방법연구각급빈적결구특정급기대분산염료성능적영향。결과표명，수착분자량적증가，목질소광산납안색가심、순도제고，분자결구중유창목기함량증다，분간기、광산기화최기적함량강저；고분자량목질소광산납대분산염료구유경우적분산성화고온은정성，염료상염솔야수기분자량적증대이증가，차당목질소광산납농도교고시，분자량증대，대섬유첨오감약。목질소광산납대염료적환원파배작용여분자량화분간기함량유관，채용절류분자량대우2.5×103적막제순적목질소광산납급빈대염료환원성최저，환원수해솔유미제순시적26.0%강위6.9%，차해급빈목질소광산납구유최우적균염성능。
Three purified sodium lignosulfonate (SL) samples with various molecular weights were prepared by fractionation using ultrafiltration.The structural characteristics of SL samples and its effect on performance of dye are investigated by means of gel permeation chromatography, ultraviolet spectrophotometry, electrolytic titration and high temperature dying process. The results show that, with increase of molecular weight, the color of SL becomes darker, its purity increases, and the content of guaiacyl increases while phenolic hydroxyl, carboxyl and sulfonic decrease. The SL with high molecular weight is of good dispersibility and high temperature stability for dispersing dyestuff, and the dyeing rate of dyestuff increases also with increase of SL molecular weight. The staining of SL for fiber could be weakened when its molecular weight is larger and its concentration is higher. In addition, the reduction destruction of SL for dyestuff depends on molecular weights and the content of phenolic hydrophilic group. The SL fraction with molecular weight above 2.5×103 can make dyestuff the most excellent levelling property and the lowest reduction effect, the reduction and hydrolysis rate reduce from 26.0% of unpurified SL to 6.9%.