长链烷基二甲苯磺酸的制备与性能研究

doi:10.3969/j.issn.1001-1803.2020.04.004

日用化学工业 ›› 2020, Vol. 50 ›› Issue (4): 233-237.doi: 10.3969/j.issn.1001-1803.2020.04.004

长链烷基二甲苯磺酸的制备与性能研究

乔建芬¹,李建波²()

^1. 山西轻工职业技术学院,山西太原 030013
^2. 中国日用化学研究院有限公司,山西太原 030001

收稿日期:2019-12-03 修回日期:2020-03-21 出版日期:2020-04-22 发布日期:2020-04-24
通讯作者: 李建波
作者简介:乔建芬（1966-）,女,山西清徐人,副教授,硕士,电话：13513639380,E-mail：qgxyqjf@126.com。
基金资助:
山西省高等职业教育“应用化工技术”骨干专业建设项目(2018-2019)

Preparation and properties of long-chain alkyl xylene sulfonic acid

QIAO Jian-fen¹,LI Jian-bo²()

^1. Shanxi Vocational and Technical College of Light Industry, Taiyuan, Shanxi 030013, China
^2. China Research Institute of Daily Chemistry Co., Ltd., Taiyuan, Shanxi 030001, China

Received:2019-12-03 Revised:2020-03-21 Online:2020-04-22 Published:2020-04-24
Contact: Jian-bo LI

摘要/Abstract

摘要：

以C_15~19烷基二甲苯为原料,采用气体SO₃鼓泡式磺化工艺合成了长链烷基二甲苯磺酸,并经红外光谱与核磁氢谱对其结构进行了表征。经单因素试验得到了长链烷基二甲苯磺酸的优化磺化工艺条件：SO₃与烷基二甲苯摩尔比为1.2∶1,SO₃体积分数为8%,磺化温度为（45±3） ℃,老化时间为20 min,水解时间为10 min,此时产品中长链烷基二甲苯磺酸的质量分数可达94.5%以上。通过平衡表面张力与动态接触角研究了长链烷基二甲苯磺酸盐的表面活性,结果表明,长链烷基二甲苯磺酸盐的临界胶束浓度（cmc）和平衡表面张力（γ_cmc）分别为1.08×10 ^-2 mmol/L和31.45 mN/m,其浓度高于4倍cmc时,对石腊膜呈现出润湿性。

关键词: 长链烷基二甲苯磺酸, 气体三氧化硫, 磺化, 表面张力, 接触角

Abstract:

Long-chain alkyl xylene sulfonic acid was synthesized from C_15~19 alkyl xylene by SO₃ bubbling sulfonation and characterized by FT-IR and ¹H NMR. The sulfonation conditions of long-chain alkyl xylene sulfonic acid were investigated by single factor test with its mass fraction in the product as the index. When SO₃ reacted with alkyl xylene at a mole ratio of 1.2∶1, sulfonation temperature of （45±3） ^oC, volume fraction of SO₃ vapor of 8%, aging time of 20 min, and hydrolysis time of 10 min, the mass fraction of long-chain alkyl xylene sulfonic acid in the product could exceed 94.5%. The surface activity of long-chain alkyl xylene sulfonate was investigated by the measurement of static surface tension and dynamic contact angle. The results indicated that, the critical micelle concentration （cmc） and surface tension at cmc （γ_cmc） of long-chain alkyl xylene sulfonate were 1.08×10 ^-2 mmol/L and 31.45 mN/m at 298 K, respectively. When the concentration of long-chain alkyl xylene sulfonate was higher than 4 cmc, it showed wettability to paraffin film.

Key words: long-chain alkyl xylene sulfonic acid, gaseous sulfur trioxide, sulfonation, surface tension, contact angle

中图分类号:

TQ423

乔建芬,李建波. 长链烷基二甲苯磺酸的制备与性能研究[J]. 日用化学工业, 2020, 50(4): 233-237.

QIAO Jian-fen,LI Jian-bo. Preparation and properties of long-chain alkyl xylene sulfonic acid[J]. China Surfactant Detergent & Cosmetics, 2020, 50(4): 233-237.

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长链烷基二甲苯磺酸的制备与性能研究

Preparation and properties of long-chain alkyl xylene sulfonic acid

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