Cellulosic Superabsorbent Polymer


HKRITA has developed technologies to recycle post-consumer cotton and polyester blend textiles through material separation. It has been successful in recovering polyester fibres and converting cotton into cellulose powder. This project transforms the cellulose powder of recycled textiles wastes into superabsorbent polymer (SAP), which is seen to be useful in the agricultural sector.


The transformed SAP is able to absorb over 30 times the volume of liquid and retain more than 20 times the volume of liquid relative to its own mass. Having such great water retention and moisture releasing properties, the cellulosic SAP can help cotton farmers retain soil moisture and therefore reduce water consumption in irrigation. It is an ideal agricultural water retention agent which helps agricultural products adapt to extreme climate conditions, such as drought and a surplus of precipitation.


The water release and retention function of the cellulosic SAP can be reused on both sunny and rainy days. Its ecological advantage lies in its natural cellulosic properties. It offers huge benefits to the environment compared to most commercial water-absorbing SAPs in the market, which are made of acrylate or petrochemical-based materials and often used in the production of diapers and sanitary napkins.

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