Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198

doi:10.1016/j.cjche.2021.03.056

中国化学工程学报 ›› 2022, Vol. 48 ›› Issue (8): 12-20.DOI: 10.1016/j.cjche.2021.03.056

Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198

Jiawei Dong^1,2, Yanhui He², Junfen Zhang¹, Zhansheng Wu^1,2

1. School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China;
2. Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710000, China

收稿日期:2021-02-27 修回日期:2021-03-05 出版日期:2022-08-28 发布日期:2022-09-30
通讯作者: Zhansheng Wu,E-mail:wuzhans@xpu.edu.cn
基金资助:
This work was financially supported by the National Natural Science Foundation of China (21566035, U1803332), Key Research and Development Program of Shaanxi Province (2020NY-132).

Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198

Jiawei Dong^1,2, Yanhui He², Junfen Zhang¹, Zhansheng Wu^1,2

1. School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China;
2. Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710000, China

Received:2021-02-27 Revised:2021-03-05 Online:2022-08-28 Published:2022-09-30
Contact: Zhansheng Wu,E-mail:wuzhans@xpu.edu.cn
Supported by:
This work was financially supported by the National Natural Science Foundation of China (21566035, U1803332), Key Research and Development Program of Shaanxi Province (2020NY-132).

摘要/Abstract

摘要： In this study, different sizes of microcapsules with alginate and bentonite as natural macromolecular materials were prepared to investigate the release property of Pseudomonas putida Rs-198. The characteristics of three microcapsules were evaluated by SEM, FTIR, TG-DSC, XRD and wall thickness. The sizes of three microcapsules (MA, MB, and MC) were 1270.50, 831.79 and 42.52?μm, respectively. First, the encapsulation efficiency of three MA, MB, and MC microcapsules were 82.20%, 90.41%, and 85.84%, respectively. Second, the contact angles of MA and MB samples were similar, while smaller microcapsules MC have higher contact angle (85.05°), indicating poor hydrophilia and decreasing the swelling degrees. Third, the release cumulant of Rs-198 and macromolecule BSA linear stage was fitted to self-established mathematic model. Results show that the microcapsule size had a considerably positive effect on release detail. The large microcapsule possessed strong leak-tightness for Rs-198 as a slow-release microbial agent. Furthermore, the porosity of microcapsules determined their swelling and release and may affect bacterial growth and survival. In conclusion, the Rs-198 microcapsule with different sizes will be pertinently selected based on the characteristics of agricultural production requirements.

关键词: Microcapsules sizes, Alginate-bentonite, Release model, Swelling degree

Abstract: In this study, different sizes of microcapsules with alginate and bentonite as natural macromolecular materials were prepared to investigate the release property of Pseudomonas putida Rs-198. The characteristics of three microcapsules were evaluated by SEM, FTIR, TG-DSC, XRD and wall thickness. The sizes of three microcapsules (MA, MB, and MC) were 1270.50, 831.79 and 42.52?μm, respectively. First, the encapsulation efficiency of three MA, MB, and MC microcapsules were 82.20%, 90.41%, and 85.84%, respectively. Second, the contact angles of MA and MB samples were similar, while smaller microcapsules MC have higher contact angle (85.05°), indicating poor hydrophilia and decreasing the swelling degrees. Third, the release cumulant of Rs-198 and macromolecule BSA linear stage was fitted to self-established mathematic model. Results show that the microcapsule size had a considerably positive effect on release detail. The large microcapsule possessed strong leak-tightness for Rs-198 as a slow-release microbial agent. Furthermore, the porosity of microcapsules determined their swelling and release and may affect bacterial growth and survival. In conclusion, the Rs-198 microcapsule with different sizes will be pertinently selected based on the characteristics of agricultural production requirements.

Key words: Microcapsules sizes, Alginate-bentonite, Release model, Swelling degree

Jiawei Dong, Yanhui He, Junfen Zhang, Zhansheng Wu. Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198[J]. 中国化学工程学报, 2022, 48(8): 12-20.

Jiawei Dong, Yanhui He, Junfen Zhang, Zhansheng Wu. Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198[J]. Chinese Journal of Chemical Engineering, 2022, 48(8): 12-20.

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Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198

Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198

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