微波辐照合成麦草碱木质素三甲基季铵盐的分散与絮凝性能

以造纸黑液中提取的麦草碱木质素为原料，在微波辐照下合成了麦草碱木质素三甲基季铵盐，检测其絮凝和分散性能。结果表明:麦草碱木质素三甲基季铵盐的表面张力随着质量浓度的增加而降低，当质量浓度为500 mg/L时，表面张力为63.64 mN/m，水溶液表面张力降低效果不明显；对碳酸钙颗粒具有一定的分散性能，可以将其作为阻垢剂使用；对酸性染料酸性红B和酸性橙GG均有脱色作用，且对酸性橙GG的脱色率更高；质量浓度为300 ～500 mg/L、pH值不高于3时，对质量浓度为1 000 mg/L的高岭土胶体颗粒悬浮液具有絮凝沉降作用。 

Dispersibility and flocculability of a trimethy quaternary ammonium salt of wheat-alkali-lignin under microwave irradiation.

The trimethyl quaternary ammonium salt was synthesized under microwave irradiation with wheat alkali lignin as raw material, which was extracted from black liquor from the kraft process. Its dispersibility and flocculability were determined: surface tension decreased with the increasing concentration of trimethyl quaternary ammonium salt, degreasing of surface tension was less effective toward water, the surface tension was 63.64 mN/m with its concentration of 500 mg/L;it had a certain dispersion of calcium carbonate particles and can be used as a scale inhibitor; the flocculation of trimethy quaternary ammonium salt was examined by the acid dye of Acid Red B and Acid Orange GG, and the results showed that the acid dye of Acid Red B and Acid Orange GG could be flocculated, and decolorization of Acid Orange GG was higher; the trimethyl quaternary ammonium salt had sedimentation of flocculation with a concentration of 1 000 mg/L kaolin colloidal particle at a concentration of 300-500 mg/L with pH values of no more than 3.