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Janus particles stabilized alkenyl succinic anhydride emulsion as internal sizing agent

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Abstract

Alkenyl succinic anhydride (ASA) is widely used in papermaking industry as an internal sizing agent. In situ emulsification of ASA using cationic starch is conventionally practiced because of the low shelf life of ASA emulsion. We synthesized Janus particles by surfactant-free seeded polymerization to stabilize ASA emulsion. The morphology evolution and anisotropic compositions of Janus particles were confirmed by transmission electron microscopy. The Janus particles showed a strong tendency to adsorb at the ASA–water interface and enhanced the stability of ASA emulsion. The droplet size of ASA emulsion decreased and emulsion phase volume increased with the concentration of Janus particles increased. In comparison with cationic starch, Janus particles exhibited superior emulsification performance in ASA emulsion. The ASA emulsion stabilized by Janus particles was used as an internal sizing agent for cellulose paper. The results of sizing degree and Cobb30 showed that the sizing performance of ASA emulsion stabilized by Janus particles was significantly improved. Our study provides a better choice of preparing ASA emulsion for paper sizing and promotes the application of Janus materials in paper industry.

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Acknowledgments

The authors are grateful for the financial support from the Natural Science Foundation of Shandong Province (ZR2020MB041) and the National Natural Science Foundation of China (No. 51703110).

Funding

This work was supported by Natural Science Foundation of Shandong Province (ZR2020MB041) and National Natural Science Foundation of China (No. 51703110).

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by WH, SJ, ZY, ZZ and CS. The first draft of the manuscript was written by WH and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Shijie Cheng.

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The authors have no relevant financial or non-financial interests to disclose.

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Wang, H., Sun, J., Zhao, Y. et al. Janus particles stabilized alkenyl succinic anhydride emulsion as internal sizing agent. Cellulose 29, 6361–6372 (2022). https://doi.org/10.1007/s10570-022-04677-5

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  • DOI: https://doi.org/10.1007/s10570-022-04677-5

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