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Crosslinking of Agar by Diisocyanates

Crosslinking of Agar by Diisocyanates

Amit Kumar Sonker, Mezigebu Belay, Kalpana Rathore, Kousar Jahan, Sankalp Verma, Gurunath Ramanathan, Vivek Verma

Carbohydr Polym. 2018 Dec 15;202:454-460.

PMID: 30287022

Abstract:

In the present study, crosslinking of agar using diisocyanate (DI) was demonstrated to limit the high water absorption property of agar. In addition, the efficacy of aromatic diisocyanate, DDI (4, 4 diphenyl diisocyanate) and aliphatic diisocyanate, HDI (1, 6 hexamethylene diisocyanate) on crosslinked agar properties was compared. The water uptake was successfully reduced by crosslinking and its minimum values observed for DDI and HDI crosslinked agar was 33.6% and 43.6%, respectively in comparison to agar (206%). The maximum tensile strength was observed for DDI crosslinked agar (45.3 MPa) which was higher than HDI crosslinked agar (30.6 MPa) and agar (31.7 MPa). The aromatic diisocyanates crosslinked agar showed better thermal resistance at higher temperature. It was observed that aromatic diisocyanate crosslinked agar more effectively than the aliphatic diisocyanate due to the higher reactivity. The crosslinked agar samples were hemocompatible and show non-toxic nature for cell proliferation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9002180-A	Agar		9002-18-0	Price

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