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Improved properties and drug delivery behaviors of electrospun cellulose acetate nanofibrous membranes by introducing carboxylated cellulose nanocrystals

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Abstract

Cellulose acetate (CA) composite nanofibrous membranes were electrospun by introducing carboxylated cellulose nanocrystals (CCNCs) as organic nanoreinforcements which were prepared by firstly extracting the cellulose nanocrystals from microcrystal celluloses with hydrochloric acid under hydrothermal condition, and followed by oxidization with ammonium persulfate at different temperatures. The influences of the degree of carboxylation and particle size of the CCNCs on the morphology, chemical structure, thermal stability and mechanical properties of as-prepared CA composite nanofibrous membranes were investigated by scanning electron microscopy, Fourier-transform infrared spectroscopy, wide angle X-ray diffraction analysis, thermogravimetric analysis and mechanical test. Furthermore, contact angle measurement and drug release test were used to evaluate the feasibility of these nanofibrous membranes as a sustained release drug delivery system. It is found that due to the incorporation of the CCNCs, remarkable improvements on the thermal stability and mechanical properties as well as drug delivery behavior of CA nanofibrous membrane could be achieved. Especially for the CCNCs prepared at 75 °C, a long-term sustained drug delivery property with a maximum drug release content of 94% within 420 h could be obtained, benefiting from the strong hydrogen bonding between CCNCs and CA matrix, high chain orientation of CA and microstructure of nanofibrous membranes. Therefore, this kind of totally cellulose-based nanofibrous membranes would possess great potential as promising materials for controlled drug delivery applications.

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Acknowledgments

This work has been financially supported by Program for Innovative Research Team in University of Ministry of Education of China (IRT_16R13), Key Basic Research Project of Science and Technology of Shanghai (15Q10622), and the National College Students’ Innovative Training Program (201510255056).

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Authors and Affiliations

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China

    Shuo Hu & Zongyi Qin

  2. College of Material Science and Engineering, Donghua University, Shanghai, 201620, China

    Miao Cheng, Yuanyu Chen, Jiaming Liu & Youwei Zhang

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  1. Shuo Hu
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  2. Zongyi Qin
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  3. Miao Cheng
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  4. Yuanyu Chen
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  5. Jiaming Liu
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  6. Youwei Zhang
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Correspondence to Zongyi Qin or Youwei Zhang.

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Hu, S., Qin, Z., Cheng, M. et al. Improved properties and drug delivery behaviors of electrospun cellulose acetate nanofibrous membranes by introducing carboxylated cellulose nanocrystals. Cellulose 25, 1883–1898 (2018). https://doi.org/10.1007/s10570-018-1662-1

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