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. 2017 Apr 12;7:46412. doi: 10.1038/srep46412

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Visual images of lignin with water (left) and copolymer, lig-g-POZ with water, hydrogel (right) (A,a). HR-TEM images of aqueous lignin (A,b) and lig-g-POZ copolymer (A,c). Corresponding DLS histogram are given in inset of each TEM image. Atomic Force Microscopic view of lignin (B,a), lig-g-POZ copolymer (B,b). AFM images of lig-g-POZ copolymer spin coated thin film (B,c) and nanoindentation measurement for hardness is given in inset.