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A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions

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Abstract

This study proposed a simple, efficient, and energy-saving one-pot strategy to produce nanofibrillated cellulose (NFC) from bleached corn stalk, with concurrent NFC surface modifications. High-speed mechanical shearing and mechanochemical activation (urea/NaOH, oxalic acid, citric acid, and mercaptopropyl trimethoxysilane) were involved in the strategy. The effects of different surface functionalizations on the morphological, crystalline, chemical, and thermal properties of the NFC were investigated. The results suggested that the bleached corn stalk fibers were decomposed into microfibrils through intensive mechanical shearing. Each microfibril is associated with abundant branched and networked cellulose nanofibrils. NFC showed an average diameter of 23 nm and an average length of 1530 nm, with an aspect ratio of 67. The hydroxyl groups on the NFC surface were functionalized and modified by forming amide (urea/NaOH), carboxyl (oxalic acid/citric acid), and hydrogen bond (mercaptopropyl trimethoxysilane), respectively. This novel one-pot strategy opens up new application areas for production and surface functionalization of nanocellulose.

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Acknowledgments

The authors thank Mr. Cesar A. Fontanillo Lopez (KU-Leuven Center for IT and IP Law) and Dr. Shaoqing Cui (School of Biosystems Engineering and Food Science, Zhejiang University), for the language review.

Funding

This work was financially supported by the Fund for Scientific Research in the Public Interest of Ningbo (No. 2021S067 and 2022S150), the Foundation of the Department of Education of Zhejiang Province (Y202148281).

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JT: Investigation, Data Curation, Writing-Original Draft, Visualization, Funding. ZZ and ZL: Investigation, Data Curation. YW: Writing—Review & Editing, Supervision. SQ: Writing-Review & Editing, Supervision, Funding.

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Correspondence to Shaoping Qian.

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Tian, J., Qian, S., Zhang, Z. et al. A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions. Cellulose 30, 5641–5656 (2023). https://doi.org/10.1007/s10570-023-05234-4

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  • DOI: https://doi.org/10.1007/s10570-023-05234-4

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