超声波处理对木质素磺酸钠物化性能的影响

doi:10.3969/j.issn.0253-2417.2014.02.012

林产化学与工业 ›› 2014, Vol. 34 ›› Issue (2): 67-72.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

周宝文^{1 2}, 哈成勇¹, 邓莲丽^{1 2}, 莫建强^{1 2}, 孙淳宁^{1 2}, 沈敏敏¹

1. 中国科学院广州化学研究所;中国科学院纤维素化学重点实验室, 广东广州 510650;
2. 中国科学院大学, 北京 100049

收稿日期:2013-03-19 出版日期:2014-04-25 发布日期:2014-04-26
通讯作者: 沈敏敏，研究员，硕士生导师，研究领域为新型分子材料、生物质的高值化利用；E-mail：shenmm@gic.ac.cn。 E-mail:shenmm@gic.ac.cn
作者简介:周宝文（1988-），男，广西北海人，博士生，主要从事绿色化学及生物质高值化利用的研究工作
基金资助:
广东省中国科学院全面战略合作项目（2011B090300067）

Effect of Ultrasonic Treatment on Physicochemical Properties of Sodium Lignosulfonate

ZHOU Bao-wen^{1 2}, HA Cheng-yong¹, DENG Lian-li^{1 2}, MO Jian-qiang^{1 2}, SUN Chun-ning^{1 2}, SHEN Min-min¹

1. Key Laboratory of Cellulose and Lignocellulosics Chemistry; Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2013-03-19 Online:2014-04-25 Published:2014-04-26

摘要/Abstract

摘要： 直接使用超声波处理木质素磺酸钠（LS）水溶液，探索了超声波作用时间、功率以及体系的pH值对超声波作用效果的影响，并通过UV、FT-IR、 ¹H NMR 和TGA来考察超声波对木质素磺酸钠物化性能的影响。结果显示：超声波作用15、45、60和 120 min，木质素磺酸钠的酚羟基质量分数由 0.65% 分别提高到 0.71%、0.74%、0.81% 和 0.87%。10 g的LS在100 mL水中经超声波处理，超声波功率从 100 W 增强到 300 W 时，酚羟基的质量分数从 0.69% 提高到 0.92%。超声波体系的pH值对超声波结果具有最明显的影响，当用H₂SO₄调节体系的pH值为0时，超声波处理得到最高质量分数的酚羟基，高达 1.58%。UV、FT-IR和 ¹H NMR 综合结果显示，超声波对木质素磺酸钠分子的整体结构影响不大，但也会造成局部结构如苯环的部分破裂和磺酸基团的破坏。TGA结果显示超声波对木质素磺酸钠热稳定性能的影响比较复杂，原因是超声波使降解和交联作用同时发生。300 W，20 kHz超声波处理LS水溶液60 min时，超声波的降解效应使超声波木质素磺酸钠（ULS）在200～600 ℃ 温度区间的热稳定性低于LS；当超声波 150 W 40 kHz，pH值为0（浓硫酸调节），超声波处理60 min时处理所得的ULS，交联效应使其在 680 ℃ 以上高温区的耐热性能比LS有所提高。

关键词: 超声波处理, 木质素磺酸钠, 物化性能, 表征

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.

Key words: ultrasonic treatment, sodium lignosulfonate, physicochemical properties, characterization

中图分类号:

TQ35

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, 34(2): 67-72.

ZHOU Bao-wen, HA Cheng-yong, DENG Lian-li, MO Jian-qiang, SUN Chun-ning, SHEN Min-min. Effect of Ultrasonic Treatment on Physicochemical Properties of Sodium Lignosulfonate[J]. Chemistry and Industry of Forest Products, 2014, 34(2): 67-72.

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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

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