林产化学与工业Issue(2)：67-72,6.DOI:10.3969/j.issn.0253-2417.2014.02.012
超声波处理对木质素磺酸钠物化性能的影响
Effect of Ultrasonic Treatment on Physicochemical Properties of Sodium Lignosulfonate
摘要
Abstract
Sodium lignosulfonate ( LS) was treated directly by ultrasonication. The effects of ultrasonication time, power and pH on the sodium lignosulfonate were studied in present study. The physicochemical properties of sodium lignosulfonate ( LS) and sodium lignosulfonate treated with ultrasonication ( ULS) were investigated by UV, FT-IR, 1H NMR and TGA. The application of ultrasonication on sodium lignosulfonate for different time (15, 45, 60 and 120 minutes) resulted in the increment of phenolic hydroxyl to 0. 71 %, 0. 74 %, 0. 81 % and 0. 84 % from 0. 65 %, respectively. Ultrasonication was applied to 10 g sodium lignosulfonate that dissolved in 100 mL distilled water. With the ascending powder of ultrasonication from 100 to 300 W, phenolic content of sodium lignosulfonate increased from 0. 69 % to 0. 92 %. The pH exhibited the most noticeable effect on the ultrasonication. Phenolic content reached to 1. 58 % as the pH was 0. FT-IR, UV and 1H NMR showed that ultrasound might cause partial disruption of aromatic rings and sulfonic acid groups of sodium lignosulfonate. TG analysis illustrated that ultrasonication had a complex influence on thermal ability of sodium lignosulfonate due to the simultaneous degradation and cross linking reactions. When sodium lignosulfonate aqueous solution was treated by ultrasonication (300 W, 20 kHz) for 60 min, degradation had an disadvantageous effect on the thermal stability of ULS between 200 -600 ℃. However, when sodium lignosulfonate aqueous solution (pH=0,adjusted by concentrated sulfuric acid) was treated by ultrasonication (150 W, 40 kHz) for 60 min, ULS showed that the better one was over 680 ℃ because of the cross linking reactions.关键词
超声波处理/木质素磺酸钠/物化性能/表征Key words
ultrasonic treatment/sodium lignosulfonate/physicochemical properties/characterization分类
化学化工引用本文复制引用
周宝文,哈成勇,邓莲丽,莫建强,孙淳宁,沈敏敏..超声波处理对木质素磺酸钠物化性能的影响[J].林产化学与工业,2014,(2):67-72,6.基金项目
广东省中国科学院全面战略合作项目(2011B090300067) （2011B090300067）
