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Synthesis of 2-methylacrylamide/high-molecular-weight cellulose using gamma ray irradiation and preparation of cryogels for removing anionic dyes

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Abstract

We report a new method for treating high-molecular-weight cellulose with 60Co gamma rays to simultaneously graft functional groups onto the natural polymer and promote its solubility. After exposing cellulose to a 40-kilogray dose of gamma rays in the presence of 2-methylacrylamide, numerous amide groups were grafted onto the cellulose chain and its solubility increased. Amide-functionalized cryogels were prepared via the sol–gel method using the irradiated product as a raw material. Compared with 40-kGy-irradiated high-molecular-weight-cellulose cryogel, the amide-functionalized cryogels had relatively high zero-point charge pH values and excellent adsorption capacities with regard to anionic dyes over the pH range 2–10. They were also stable in terms of reusability. Therefore, the 2-methylacrylamide/high-molecular-weight cellulose cryogel has great potential for use in the treatment of colored surface wastewater. The 60Co gamma ray irradiation technique described herein is a stable and highly efficient method for the preparation of functionalized cellulose products.

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Acknowledgments

We thank Ms. Min Wang for determination of FTIR and XRD, and Mr. Cunfa Xu for detection of SEM image and BET.

Funding

This work was financially supported by Jiangsu Agricultural Science and Technology Innovation Fund (Grant No. CX(19)3082), the Six Talent Peaks Project of Jiangsu Province, China (Grant No. NY-034), the Jiangsu province Natural Sciences Foundation (BK20190003), and National Natural Science Foundation of China (31872481 and 31802167).

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Correspondence to Li Li or Bin Li.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Zhang, S., Gu, J., Fan, B. et al. Synthesis of 2-methylacrylamide/high-molecular-weight cellulose using gamma ray irradiation and preparation of cryogels for removing anionic dyes. Cellulose 29, 5511–5527 (2022). https://doi.org/10.1007/s10570-022-04615-5

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  • DOI: https://doi.org/10.1007/s10570-022-04615-5

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