Is it possible to make carboxymethyl cellulose-X composite to hydrophobic?

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Yuri Mirgorod

You need to do transesterification of carboxymethylcellulose. See the article

Article Microwave-assisted synthesis of carboxymethylcellulose - Bas...

and the answer to RG

https://www.researchgate.net/post/What_is_the_simplest_method_to_functionalize_modify_cellulose_nanocrystals_to_make_it_hydrophobic?isAnswerFieldFocused=true

Tapas Kumar Dora

Thank you Yuri Mirgorod for this suggestion

After transesterification of CMC can the composite absorb oil?

Yes