Cellulose is normally crystalline in nature. I need to reduce the crystalline nature of cellulose extraced from natural fiber so that its thermal conductivity gets reduced.
Freeze-drying or heating at high tempearture could melt the crystallites and produce amorphous powder.
Crystallinity index of Cellulose (more specifically, cellulose nano crystals) start to decrease at 200 C, however it will be decomposed at higher tempertature (~350-400 C) to form completely amorphous (possibly formation of carbon dot suggested by some papers). Also you'll see the cellulose will turn into black upon heating (mostly above 120 C).
treating the crystalline cellulose by concentrated sulphuric acid can reduce it to amorphous form.
Crystallinity of cellulose extracted from natural fibers, factors changing it, and its relation to reactivity are discussed in the below mentioned articles. Happy new year.
https://www.researchgate.net/publication/312695203_On_fine_structure_of_cellulose_fibers?_sg=gMfP5CcIeMtf8Ui1o2D3FcfifSd-jir1GBvosgkmxo4A8We9XFQwCIfRFn1pzs1by7vyJTa0sbnrQ1xzC4F_-rJPLyqkQUE04RNdPfWO.p5kh-DbWyXujNy9tZupEqqlEFISvwAfpAQS7gxv5QQb6LoNuY77hWx1CJaLD2_Puf4MN-E19g5ZJ51ZcP27ceg
https://www.researchgate.net/publication/250425822_Fine_structure_and_reactivity_of_cellulose?_sg=5fWap_Bo_4zdD_fvqH_ik_rICR79B2MqsJkQJ-GpEk0-kWUql-OagXiQ1htoCGtqy5kKGHOkgcXg6Iwn4D16loYczMtz8vJCHsSulhkH.IexQikLYtmzkEXZKF7V0Hp1o92stM2-UVAXYD-fAlxbH24tcvwxDuP_sMPad0e1_V30QOrezdoD_Gdr1Cdoxsw
https://www.researchgate.net/publication/298681455_Reactivity_of_biological_cellulose_and_properties_of_some_of_its_derivatives?_sg=5fWap_Bo_4zdD_fvqH_ik_rICR79B2MqsJkQJ-GpEk0-kWUql-OagXiQ1htoCGtqy5kKGHOkgcXg6Iwn4D16loYczMtz8vJCHsSulhkH.IexQikLYtmzkEXZKF7V0Hp1o92stM2-UVAXYD-fAlxbH24tcvwxDuP_sMPad0e1_V30QOrezdoD_Gdr1Cdoxsw
https://www.researchgate.net/publication/294690836_On_the_properties_of_never-dried_and_nature-dried_cotton?_sg=5fWap_Bo_4zdD_fvqH_ik_rICR79B2MqsJkQJ-GpEk0-kWUql-OagXiQ1htoCGtqy5kKGHOkgcXg6Iwn4D16loYczMtz8vJCHsSulhkH.IexQikLYtmzkEXZKF7V0Hp1o92stM2-UVAXYD-fAlxbH24tcvwxDuP_sMPad0e1_V30QOrezdoD_Gdr1Cdoxsw
https://www.researchgate.net/publication/312702652_On_the_activation_of_cellulose_through_xanthation_II_Viscose_and_rayon_from_activated_cellulose?_sg=5fWap_Bo_4zdD_fvqH_ik_rICR79B2MqsJkQJ-GpEk0-kWUql-OagXiQ1htoCGtqy5kKGHOkgcXg6Iwn4D16loYczMtz8vJCHsSulhkH.IexQikLYtmzkEXZKF7V0Hp1o92stM2-UVAXYD-fAlxbH24tcvwxDuP_sMPad0e1_V30QOrezdoD_Gdr1Cdoxsw
Please kindly go through this paper..
https://www.sciencedirect.com/science/article/pii/S0144861718314152
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