The functionalization
of inexpensive potato protein concentrate
(PPC) is presented as a simple and easily scalable method to produce
bio-based superabsorbent powders. Five nontoxic acylating agents were
evaluated at different reaction temperatures for solvent-free acylation
of the protein. The best results were obtained for succinic anhydride
(SA) and a reaction temperature of 140 °C. These conditions resulted
in efficient functionalization that provided formation of a useful
network, which allowed high uptake of fluids and little material disintegration
during the uptake, that is, due to protein hydrolysis during the functionalization.
The SA-acylated PPC showed increased water and saline swelling capacities
of 600 and 60%, respectively, as compared to untreated PPC. The acylated
potato protein also showed a saline liquid holding capacity of approximately
50% after centrifugation at 1230 rpm for 3 min, as well as a significant
blood swelling capacity of 530%. This blood swelling represents more
than 50% of that of a commercial fossil-based superabsorbent (SAP)
used for blood absorption in sanitary health products. The swelling
properties of these inexpensive protein-based acylated materials highlight
their potential as sustainable SAP materials (from industrial side-streams)
in applications such as daily care products that are currently dominated
by fossil-based SAPs.
Musculoskeletal pain was common during peacekeeping mission and gradual onset was dominating. Most often, it did not affect the daily activities. Nevertheless, it may be of important to consider broadening the medical disciplines onsite to provide preventive measures and treatment at an early stage, and thereby reducing the risk of chronicity.
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