Self-assembling dairy proteins for the production of novel bionanomaterials
by Kate Ryder; M. Azam Ali; Alan Carne; Jagan Billakanti
International Journal of Nanotechnology (IJNT), Vol. 15, No. 8/9/10, 2018

Abstract: The casein family of proteins shows promise for the formation of value added bionanomaterials. A co-product that is rich in casein is produced in excess as a by-product of the dairy and dairy processing industries. Caseins derived from dairy dissolved air flotation (DAF)-derived casein sludge were found to possess different fundamental properties. When analysed by RP-HPLC, the hydrophobic profile of the DAF-derived caseins were found to be different from that of skim milk powder (SMP) caseins. Rheological studies found that DAF-derived caseins were more viscous than those from SMP, which supported the idea that the DAF process may have induced some additional cross-linking between neighbouring caseins. This was also justified by the high apparent molecular weight of some caseins when separated on SDS-PAGE and identified by MALDI-TOF MS. The DAF-derived caseins were found to self-assemble, and produce cohesive and flexible films when dried under controlled conditions. These observations indicate that the DAF-derived caseins may have distinct features enabling the production of novel value-added bionanomaterials.

Online publication date: Fri, 22-Mar-2019

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