1. Hemicellulose hydrogels
Nina Forsman,

2. Hydrogels? Applications?
network of hydrophilic polymers
produced through chemical or physical crosslinking
highly absorbent
flexibelity similar to natural tissue
tissue engineering
drug delivery
absorbation of toxic metals
environmentally sensisitve hydrogels: pH, temperature, concentration ...
cell culture
contact lenses (silicon hydrogels)
...
Sun et al. Hemicellulose-based pH-sensitive and biodegradable hydrogel for controlled drug delivery. Carbohydrate Polymers p

3. Synthesis of Hce-MA/PNIPAAm hydrogels
Yang, J., Y., Zhou, X., S., & Fang, J. Synthesis and characterization of temperature sensitive hemicellulose-based hydrogels.Carbohydrate Polymers p

4. pH-sensitivity & drug delivery
Drug release from drug- loaded hydrogel.
Effect of pH on the equilibrium swelling ratio of hydrogels prepared under various reaction conditions: (c) effect of initiator amount; (d) effect of AAc neutralisation degree.
Sun et al. Hemicellulose-based pH-sensitive and biodegradable hydrogel for controlled drug delivery. Carbohydrate Polymers p

5. Removal of metal ions & water purification
Swelling behaviour of a hydrogel; g of the dried hydrogel was able to take up 10.4 mL of water.
Sorption of As(V) and Cr(VI) for different hydrogels and Amberlite IRA 400-Cl as a commercial product.
Dax et al. Cationic hemicellulose-based hydrogels for arsenic and chromium removal from aqueous solutions. Carbohydrate Polymers p. 797 –

6. Conclusions & thoughts
Many promising applications
Other applications not presented here:
Electrically conductive HC hydrogels
High strength HC hydrogels
Use of a byproduct -> good!
Biodegrability –> good
Need of other non-biodegrabel chemicals?
HC hydrogels superior to hydrogels made from NFC/synthetic polymers?

7. References
Sun et al. Hemicellulose-based pH-sensitive and biodegradable hydrogel for controlled drug delivery. Carbohydrate Polymers p doi: /j.carbpol
Yang, J., Y., Zhou, X., S., & Fang, J. Synthesis and characterization of temperature sensitive hemicellulose-based hydrogels. Carbohydrate Polymers p doi: /j.carbpol
Dax et al. Cationic hemicellulose-based hydrogels for arsenic and chromium removal from aqueous solutions. Carbohydrate Polymers p. 797 – doi: /j.carbpol