Studying physico-mechanical properties of maleic acid grafted chitosan with metal as slow release fertilizers


  • Elsayed Negim Wolverhampton University
  • Lyazzat Bekbayeva
  • Laura Jumabayeva
  • Azhar Bakyt
  • Aigul Imandossova
  • Assel Zhanybekova
  • Shynar Yegizbayeva
  • Zhanerke Karimzhanova
  • Datkhayev Ubaidilla
  • Misni Surif





Grafting, Chitosan, Maleic Acid, Potassium Persulfate, Metal Ions.


Chitosan (CS) was successfully grafted with maleic acid (MA) in 1% acetic acid solution by using potassium persulfate (KPS) as the initiator. The grafting yield (GY) up to 84.25 % and grafting efficiency (GE) of 64.82 % were achieved. The formation of grafted chitosan was confirmed with usual spectroscopic methods and thermal analysis. The raw grafted chitosan was mixed with Na+, Mg2+ and Ca2+ in aqueous hydroxide solution and K+ in aqueous chromate solution. The reaction mixtures were separated from excess unreacted maleic acid and characterized as a reacted grafted chitosan. The results showed a new form of maleic grafted chitosan after the reaction with metals. Also, grafted of CS with MA provide a promising set of materials for potential slow release fertilizer applications.


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