磺甲基化乙酸木质素制备农药分散剂及其性能评价

doi:10.3969/j.issn.0253-2417.2022.03.003

林产化学与工业 ›› 2022, Vol. 42 ›› Issue (3): 19-26.doi: 10.3969/j.issn.0253-2417.2022.03.003

磺甲基化乙酸木质素制备农药分散剂及其性能评价

朱文祥¹, 谌凡更¹^,*(), 何甜¹, 宿宇辉¹, 刘运思²

1. 华南理工大学轻工科学与工程学院，广东广州 510640
2. 广州楹鼎生物科技有限公司，广东广州 510610

收稿日期:2021-03-21 出版日期:2022-06-28 发布日期:2022-07-04
通讯作者: 谌凡更 E-mail:fgchen@scut.edu.cn
作者简介:谌凡更，研究员，博士生导师，研究领域为植物资源化学与生物质转化；E-mail: fgchen@scut.edu.cn
朱文祥(1995—)，男，湖南衡阳人，硕士生，从事生物质资源高值化利用研究工作

Preparation of Pesticide Dispersant from Acetic Acid Lignin and Performance Evaluation

Wenxiang ZHU¹, Fangeng CHEN¹^,*(), Tian HE¹, Yuhui SU¹, Yunsi LIU²

1. School of Light Industry Science and Engineering, South China University of Technology, Guangzhou 510640, China
2. Guangzhou Yinnovator Biotech Co., Ltd., Guangzhou 510610, China

Received:2021-03-21 Online:2022-06-28 Published:2022-07-04
Contact: Fangeng CHEN E-mail:fgchen@scut.edu.cn

摘要/Abstract

摘要：

用不同质量分数乙酸对乙酸木质素(AAL)进行分级，得到不同相对分子质量的4个级分(AAL-1~AAL-4)。通过磺甲基化改性，以AAL-1~AAL-4为原料，制得不同相对分子质量的磺甲基化木质素(SML)样品SML-1~SML-4;以AAL-2为原料，添加不同用量的无水亚硫酸钠制备不同磺酸基含量的磺甲基化木质素SML-A~SML-D，并将其作为农药分散剂，制备40%腈菌唑可湿性粉剂(WP)，探讨了SML相对分子质量和磺酸基含量对40%腈菌唑WP应用性能的影响。研究结果表明：当SML的重均相对分子质量从5 768提高到13 964，腈菌唑悬浮率从72.68%升至83.69%，润湿时间从45 s升至62 s；当磺酸基从0.51 mmol/g增加到1.78 mmol/g，腈菌唑悬浮率从73.56%升至84.86%，润湿时间从72 s降至57 s。随着相对分子质量和磺酸基含量提高，40%腈菌唑WP悬浮液分散相的平均粒径降低，分散性较好；但过高的相对分子质量反而使腈菌唑悬浮率下降。

关键词: 乙酸木质素, 腈菌唑, 磺甲基化木质素, 分散剂

Abstract:

Acetic acid lignin(AAL) was fractionated by dissolution in aqueous solution of acetic acid with various mass fraction. Four fractions with different relative molecular weight, which were chosen from the fractionation products, were sulfomethylated to obtain products with different relative molecular weight and sulfonic group content. The sulfomethylated lignin(SML) was added into myclobutanil as a pesticide dispersant to get a 40% myclobutanil wettable powder(WP). The influence of relative molecular weight and sulfonic group content on the application performance of 40% myclobutanil wettable powder was investigated. The results indicated that the suspension rate of myclobutanil increased from 72.68% to 83.69% and the wetting time increased from 45 s to 62 s when the average molecular weight increased from 5 768 to 13 964. The suspension rate of myclobutanil increased from 73.56% to 84.86% and the wetting time decreased from 72 s to 57 s when the sulfonic group increased from 0.51 mmol/g to 1.78 mmol/g. The average particle size of the dispersed phase of a 40% myclobutanil WP decreased when the relative molecular weight and sulfonic group content increased. However, too high relative molecular weight resulted in a decrease of the suspension rate of myclobutanil.

Key words: acetic acid lignin, myclobutanil, sulfonomethylated lignin, dispersant

中图分类号:

TQ35
O636.2

朱文祥, 谌凡更, 何甜, 宿宇辉, 刘运思. 磺甲基化乙酸木质素制备农药分散剂及其性能评价[J]. 林产化学与工业, 2022, 42(3): 19-26.

Wenxiang ZHU, Fangeng CHEN, Tian HE, Yuhui SU, Yunsi LIU. Preparation of Pesticide Dispersant from Acetic Acid Lignin and Performance Evaluation[J]. Chemistry and Industry of Forest Products, 2022, 42(3): 19-26.

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参考文献 20

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样品 sample	级分 fraction	得率/% yield	M_w	M_n	M_w/M_n
AAL-1	60%乙酸溶解60% acetic acid dissolution	29.36±1.12	5215	3432	1.52
AAL-1i	60%乙酸不溶60% acetic acid insoluble	69.97±1.86	13298	6561	2.02
AAL-3d	65%乙酸溶解65% acetic acid dissolution	44.57±1.48	6024	3544	1.70
AAL-3	65%乙酸不溶65% acetic acid insoluble	56.39±1.66	13580	4755	2.86
AAL-4i	70%乙酸溶解70% acetic acid dissolution	65.21±1.51	7976	3876	2.06
AAL-4	70%乙酸不溶70% acetic acid insoluble	31.74±1.86	18185	5346	3.40
AAL-2	75%乙酸溶解75% acetic acid dissolution	83.16±1.45	9017	3966	2.27
AAL-2i	75%乙酸不溶75% acetic acid insoluble	17.30±1.40	18574	5145	3.61

样品sample	M_w	M_n	M_w/M_n	—SO₃H/(mmol·g^-1)
SML-1	5768	3845	1.50	1.42
SML-2	9564	4604	1.86	1.37
SML-3	13964	6913	2.02	1.36
SML-4	19248	8191	2.35	1.32
SML-A	9236	4887	1.89	0.51
SML-B	9467	4641	2.04	0.92
SML-C	9568	4983	1.92	1.35
SML-D	9416	4441	2.12	1.78

分散剂 dispersant	—SO₃H/(mmol·g^-1)	M_w	悬浮率suspending rate/%		润湿性wettability/s
分散剂 dispersant	—SO₃H/(mmol·g^-1)	M_w	热贮前 before heat storage	热贮后 after heat storage	热贮前 before heat storage	热贮后 after heat storage
SML-1	1.42	5768	72.68	67.45	45	36
SML-2	1.37	9564	77.86	73.79	55	40
SML-3	1.36	13964	83.69	80.47	62	39
SML-4	1.32	19248	83.12	79.92	68	37
SML-A	0.51	9236	73.56	69.69	72	50
SML-B	0.92	9467	77.48	71.96	65	46
SML-C	1.35	9568	83.27	79.68	60	54
SML-D	1.78	9416	84.86	80.32	57	48

项目 item	不同分散剂中的平均粒径average particle size in different dispersant/μm
项目 item	SML-1	SML-2	SML-3	SML-4	SML-A	SML-B	SML-C	SML-D
热贮前before heat storage	8.76	5.65	3.60	2.97	10.34	8.52	6.12	5.50
热贮后after heat storage	13.77	8.87	5.92	5.51	16.21	13.94	9.26	10.50

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磺甲基化乙酸木质素制备农药分散剂及其性能评价

Preparation of Pesticide Dispersant from Acetic Acid Lignin and Performance Evaluation

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