Volume 137, Issue 12 48480
Article

Amphoteric superabsorbent polymer based on waste collagen as loading media and safer release systems for herbicide 2, 4-D

Shuangfeng Xu

Shuangfeng Xu

School of Chemical Engineering, Sichuan University, Chendu, 610065 China

Search for more papers by this author
Yanyu Yin

Yanyu Yin

School of Chemical Engineering, Sichuan University, Chendu, 610065 China

Search for more papers by this author
Yaling Wang

Yaling Wang

School of Chemical Engineering, Sichuan University, Chendu, 610065 China

Search for more papers by this author
Xin Li

Xin Li

School of Chemical Engineering, Sichuan University, Chendu, 610065 China

Search for more papers by this author
Zaiyin Hu

Corresponding Author

Zaiyin Hu

College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, 618307 China

Correspondence to: Z. Hu (E-mail: [email protected]), R. Wang (E-mail: [email protected])Search for more papers by this author
Ru Wang

Corresponding Author

Ru Wang

School of Chemical Engineering, Sichuan University, Chendu, 610065 China

Correspondence to: Z. Hu (E-mail: [email protected]), R. Wang (E-mail: [email protected])Search for more papers by this author
First published: 30 September 2019
Citations: 18

ABSTRACT

As release formulations, superabsorbent polymers have attracted considerable attentions to reduce herbicide leaching and mitigate contamination. For this purpose, this study dealt with preparation, characterization, and performance test of a novel amphoteric superabsorbent polymer in adsorption and release of 2, 4-Dichlorophenoxyacetic acid (2, 4-D) herbicide. LW-g-p(AA-co-DMDAAC) was successfully synthesized by using leather waste (LW) as raw material and acrylic acid (AA), and dimethyldiallylammonium chloride (DMDAAC) as monomers. Then, the resulting LW-g-p(AA-co-DMDAAC) was characterized before and after 2, 4-D sorption by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). In addition, LW-g-p(AA-co-DMDAAC) with great equilibrium swelling capacity of 3203 g/g in distilled water, 181 g/g in 0.9 wt % NaCl exhibited excellent performance of swelling. Two absorption peaks appeared at pH = 4 and 7 solely when swelling occurred, and the swelling behavior in pH = 7 satisfied the pseudo first-order kinetic equation. Moreover, the sorbed 2, 4-D reached at 68 mg/g and showed sustained release cycle of 45 days under acidic or alkaline conditions. Therefore, the sustained release pattern of 2, 4-D as well as water absorbency made LW-g-p(AA-co-DMDAAC) suitable and potential candidate for controlling the release of herbicides to improve utilization and reduce environmental pollution. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48480.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.