In the present research biocomposites based on extracts of collagen and keratin recovered from the leather industry by-products were made and the specific properties for applications in agriculture and industry were studied. To this aim, collagen and keratin have been extracted from bovine leather and sheep wool by-products and have been added and crosslinked with recognized compounds for reduced environmental impact (glycerol, vegetable tanning extract, essential oils with fungicidal properties and insecticides). The biocomposite properties were evaluated on the basis of complex analytical investigations on chemical structure, texture, contact angle, mechanical resistance, water vapor permeability and water absorption, biodegradation, germination and plant biomass growth. The biocomposites have demonstrated pelliculogenic properties and nitrogen controlled release to stimulate germination and nutrition of rape seedlings, which promotes them for agricultural applications, but also other surface properties have been identified, for industrial applications, for example in leather finishing for special destinations. Addition of odorous principles with controlled release recommends this type of biocomposites for environmentally friendly products, maintenance of cleaning, etc.
1. Rodriguez MIA, Barroso LGR, Sanchez ML. Collagen: A review on its sources and potential cosmetic applications. J Cosmet Dermatol 2018; 17(1): 20-26.
2. Delgado LM, Shologu N, Fuller K, Zeugolis DI. Acetic acid and pepsin result in high yield, high purity and low macrophage response collagen for biomedical applications. Biomed Mater 2017; 12(6): article no. 065009.
3. Fu W, Liu ZL, and al. Electrospun gelatin/PCL and collagen/PLCL scaffolds for vascular tissue engineering. Int J Nanomed 2014; 9: 2335-2344.
4. Sedliačik J, Jurkovič P, Niculescu M. Application of Collagen Colloid from Chrome Shavings for Innovative Polycondensation Adhesives. In: Fourth Scientific and Technical Conference IUFRO Sofia, Bulgaria 2011.
5. Matyasovsky J, Jurkovic P, Skultety J, et al. Collagen and keratin as environmentally friendly natural polymers for modification of wood adhesives. In: Proceedings of 2nd International Scientific Conference “Wood-Science-Economy” Poznan, Poland 2017; 1: 73.
6. Matyasovsky J, Sedliacik J, Novak I, et al., Antioxidant Activity of Keratin Hydrolysates Studied by DSC. In: 114th Annual Convention of The American Leather Chemists Association, Itasca, IL, U.S.A. 2018.
7. Gaidau CC, Niculescu MD, Epure DG, Stepan E, Gidea M. Bioproducts based on collagen and keratin for seeds and plant treatment. J Biotechnol 2017; 256 Supplement: S110.
8. Niculescu MD, Gaidau C, Epure DG, Gidea M. Experimental Observations About Improving the Properties of Collagen Extracts for Applications in Agriculture. Rev Chim-Bucharest 2018; 69(2): 379-385.
9. Berechet MD, Niculescu M, Gaidau C, Ignat M, Epure DG. Alkaline-Enzymatic Hydrolyses of Wool Waste for Different Applications. Rev Chim-Bucharest 2018; 69(7): 1649-1654.
10. Du Z, Ji B, Yan K. Recycling keratin polypeptides for anti-felting treatment of wool based on L-cysteine pretreatment. J Clean Prod 2018; 183: 810-817.
11. Hassanzadeh M, Ghaemy M. Preparation of bio-based keratin-derived magnetic molecularly imprinted polymer nanoparticles for the facile and selective separation of bisphenol A from water. J Sep Sci 2018; 41(10): 2296-2304.
12. Piazza GJ, Garcia RA. Proteins and peptides as renewable flocculants. Bioresource Technol 2010; 101: 5759–5766.
13. Piazza GJ, Garcia RA. Proteolysis of meat and bone meal to increase utilization. Anim Prod Sci 2013; 54(2): 200-206.
14. Wang XC, Zhang S, Zhou L, Ren LF. Preparation and characterization of a cationic flocculant based on modified collagen. Journal of Functional Materials 2011; 42(12): 2221-2224.
15. Craciun G, Manaila E, Niculescu M, Ighigeanu D. Obtaining a new type of polyelectrolyte based on acrylamide and hydrolyzed collagen by electron beam irradiation. Polymer Bulletin, 2017; 74(4): 1299–1326.
16. Gaidau C, Simion D, Niculescu MD, Paun G, Popescu M, Bacardit A, Casas C. Tara Tannin Extract Improvement. Part I: Extraction and Concentration Through Membranary Filtration Techniques. Rev. Chim.-Bucharest 2014; 65(8): 929-933.
17. Niculescu MD, Berechet MD, Gaidau C, Ignat M, Radu M. Study on obtaining keratin extracts from leather industry by-products. In: Proceedings of ICAMS 2016 – 6th International Conference on Advanced Materials and Systems, Bucharest, Romania 2016: 477-482.
18. Stepan E, Velea S, Epure DG, Gaidau CC, Niculescu MD, Gidea M. Compositions containing microencapsulated essential oils and plant biostimulants, for sustainable agriculture. J Biotechnol 2017; 256 Supplement: S110.
19. Niculescu M, Gaidau C, Chen W, Gavrila R, Ignat M, Epure DG. Studies for Production and Characterization of Collagen Layers for Agricultural Applications. IJASEAT 2017; 5(4) Spl. Iss-2: 10-14.
20. Gaidau C, Epure DG, Niculescu M, Stepan E, Radu E, Gidea M. Application of Collagen Hydrolysate in Cereal Seed Treatment, In: e-Proceedings of 33rd International Association of Leather Trades Chemists Congress (IULTCS 2015), Novo Hamburgo, Brazil 2015; article no. 072: 1-7.
21. Gidea M, Stepan E, Enascuta EC, Gaidau C, Niculescu M, Epure DG, Cioineag C, Sandulescu EB, Epure LI. Researches on the biostimulating and antidehiscent effect of products based on fish collagen crosslinked to rape crop, J Biotechnol 2017; 256 Supplement: S100.
22. Gaidau C, Niculescu M, Epure DG, Becheritu M, Gidea M, Stepan E. Collagen based bio-functional products for plant treatment, Proceedings of International Conference Agriculture and Food for XXI, Sibiu, Romania, 2017: 52-59.