木质素磺酸盐的分散研磨性能和改性研究

发布时间：2018-04-07 00:24

本文选题：木质素磺酸盐　切入点：分子量分级　出处：《高校化学工程学报》2016年05期

【摘要】：为提升低品质木质素磺酸盐的分散研磨性能,以高品质的Reax 85A为基础性研究的对象,通过不同截留分子量的超滤膜对它进行分子量分级,获得了三个不同特性黏度([η])的木质素磺酸盐组分。将它们作为分散剂对C.I.分散蓝354的原染料进行研磨以考察其分散研磨效率。结果表明,木质素磺酸盐的分散研磨性能与其特性黏度大小正相关。为验证这一结论,在苯酚和甲醛的存在下,对特性黏度较小的木质素磺酸盐进行了分子量嫁接的改性反应,并考察了各改性产物作为分散剂在相同实验条件下对同一染料的分散研磨效率。结果表明,改性产物的特性黏度随苯酚和甲醛投料质量比的增加而增大,但是苯酚和甲醛的投料质量比不宜过大,否则会有酚醛缩合物生成;特性黏度较大的改性产物其分散研磨性能也较好,组分R-00([η]=2.25)与Vyborg([η]=3.74)经嫁接反应后获得的改性产物([η]=4.28)使同一染料分散体的扩散度达到5级只需要16 h,其分散研磨效率高于Reax 85A。
[Abstract]:In order to improve the dispersive grinding performance of low quality lignosulfonate, high quality Reax 85A was used as the basic research object, and the molecular weight was classified by ultrafiltration membrane with different molecular weight interception.Three lignosulfonate components with different intrinsic viscosity ([畏]) were obtained.They were used as dispersants for C. I.The raw dye of disperse blue 354 was ground to investigate its dispersion grinding efficiency.The results show that the dispersive grinding performance of lignosulfonate is positively related to its intrinsic viscosity.In order to verify this conclusion, in the presence of phenol and formaldehyde, lignosulfonate with low intrinsic viscosity was grafted with molecular weight.The dispersing efficiency of the modified products for the same dye was investigated under the same experimental conditions.The results show that the intrinsic viscosity of the modified product increases with the increase of the mass ratio of phenol to formaldehyde, but the mass ratio of phenol to formaldehyde should not be too large, otherwise there will be phenolic condensation.
【作者单位】：华东理工大学精细化工研究所;南通恒盛精细化工有限公司;
【分类号】：X793;TQ610.499

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