Smart Hydrogels with Collagen Structure Made of Pelt Waste

Zainescu, Gabriel; Constantinescu, Rodica Roxana; Sîrbu, C.

doi:10.37358/rc.17.2.5461

Cited by 9 publications

(7 citation statements)

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“…The Dulbecco's modified Eagle's medium (DMEM) was from BioChrom AG, (BioChrom AG Berlin, Germany). The collagen hydrolysate (7% w/v), used in the present work, was produced according to published procedure [23] and provided by National Research & Development Institute for Textile and Leather (INCDTP, Bucharest, Romania) in the frames of the project AGRO-SMARTGEL (Grant agreement n • 5021383/INCOMERA project). Ultra-pure water was obtained by means of an SG apparatus water purification unit.…”

Section: Methodsmentioning

confidence: 99%

Modification of Collagen Derivatives with Water-Soluble Polymers for the Development of Cross-Linked Hydrogels for Controlled Release

et al. 2019

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Novel cross-linked hydrogels were synthesized as potential materials for the development of smart biofertilizers. For this purpose, hydrogels were prepared using collagen hydrolysate recovered from tannery waste. The water-soluble polymer poly(sodium 4-styrenesulfonate-co-glycidyl methacrylate) (P(SSNa-co-GMAx)) was among others used for the cross-linking reaction that combined hydrophilic nature with epoxide groups. The synthetic procedure was thoroughly investigated in order to ensure high percentage of epoxide groups in combination with water-soluble behavior. The copolymer did not show cytotoxicity against normal lung, skin fibroblasts, or nasal polyps fibroblasts. Through the present work, we also present the ability to control the properties of cross-linked hydrogels by altering copolymer’s composition and cross-linking parameters (curing temperature and time). Hydrogels were then studied in terms of water-uptake capacity for a period up to six days. The techniques Proton Nuclear Magnetic Resonance (1H NMR), Thermogravimetric Analysis (TGA), Size Exclusion Chromatography (SEC), and Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR) were applied for the characterization of the synthesized copolymers and the cross-linked hydrogels. Three samples of biofertilizers based on collagen hydrolysate functionalized with P(SSNa-co-GMAx) and starch and having nutrients encapsulated (N, P, K) were prepared and characterized by physical–chemical analysis and Energy Dispersive X-ray analysis-Scanning Electron Microscope (EDAX-SEM) in terms of microstructure. Preliminary tests for application as fertilizers were performed including the release degree of oxidable organic compounds.

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Section: Methodsmentioning

confidence: 99%

Modification of Collagen Derivatives with Water-Soluble Polymers for the Development of Cross-Linked Hydrogels for Controlled Release

et al. 2019

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“…The result was a gelatinous, elastic and semitransparent collagen hydrogel with encapsulated nutrients (HZ), with a pH of 6.2-6.9 [8][9][10]. By means of this process a technology can be established for the conversion of pelt waste into collagen hydrogels with encapsulated nutrients that can be used as fertilizers in agriculture (especially in horticulture) [11][12][13][14].…”

Section: Experimental Partmentioning

confidence: 99%

Study of Collagen Hydrogel Biodegradability Over Time

Zainescu¹,

Albu²,

Constantinescu³

2018

Rev. Chim.

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Hydrogels have drawn the interest of researchers over the past decade, due to their intrinsic properties for applications in medicine, agriculture [1,2], food industry, pharmaceuticals, environmental protection and biomaterials, etc. Obtaining hydrogels with collagen structure by hydrolyzing pelt waste and using them for applications in agriculture is a novelty, considering that the collagen structure is currently used only in medicine. The paper presents an experimental model for obtaining hydrogels with collagenous structure from pelt waste resulting from the liming process. As a biological material, the hydrogel with collagen structure is a complex medium, optimal for the development of a variety of biodeteriogenic organisms due to a considerable amount of protein as well as the presence of lipids and carbohydrates that provide an excellent nutrient substrate for many biological species. During the phase of incorporation into the soil of the collagen hydrogel, proteolytic bacteria develop particularly, stimulated by humidity and possibly by temperature, thus producing biodegradation.The paper presents the methodology for studying the biodegradability of collagen hydrogel with encapsulated nutrients.

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“…Collagen could be processed as films, membranes, sponges or skin grafts [ 15 ], and collagen hydrogels could be obtained by the hydrolysis of pelt waste, since leather processed in tanneries results in about half pelt waste from a ton of raw hides [ 16 ]. Hydrogels exhibit a significant property of swelling and could contribute to a gradual release of nutrients [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogels exhibit a significant property of swelling and could contribute to a gradual release of nutrients [ 17 ]. Collagen hydrogels properties and stability could be enhanced by adding formaldehyde, glutaraldehyde, carbodiimides, polyepoxy compounds, acyl azides and hexamethylene diisocyanate [ 15 ] or cross-linked polymers such as polyacrylamide [ 16 ], while encapsulating nutrients in the collagen matrix could lead to find potential applications in horticulture [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Collagen-Based Hydrogels Composites from Hide Waste to Produce Smart Fertilizers

et al. 2020

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The study aims at reusing and recycling the protein hide waste from the leather industry in ecological conditions by elaborating an innovative procedure in order to obtain a collagen matrix functionalized with nitrogen, phosphorus, and potassium (NPK) nutrients to be used for preparing smart fertilizers. This is an interdisciplinary approach, as it starts from hide waste raw material as a critical industrial waste, which is then subjected to several technological steps by selection of optimal processing parameters, followed by product fabrication at the laboratory, and next scales to the industrial pilot plant to obtain novel agro-hydrogels. In this context, the technology scheme for collagen hydrolysate with encapsulated nutrients was proposed and the process parameters were optimized by functionalization of agro-hydrogels with various natural and synthetic polymers, such as polyacrylamide, poly(sodium 4-styrenesulfonate-co-glycidyl methacrylate) copolymer, starch or dolomite. Based on the laboratory experiments, a pilot plant was constructed and tested. Taking as reference the collagen hydrolysate with encapsulated nutrients, the new fertilizers were adequately characterized by chemical analysis, determination of biodegradability and the degree of release of oxidable compounds in water. Based on the biodegradation mechanism and kinetic analysis of oxidable compounds release, adequate arguments are evidenced to demonstrate that these fertilizers can be applied for amendment of poor agricultural soils.

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Smart Hydrogels with Collagen Structure Made of Pelt Waste

Cited by 9 publications

References 0 publications

Modification of Collagen Derivatives with Water-Soluble Polymers for the Development of Cross-Linked Hydrogels for Controlled Release

Modification of Collagen Derivatives with Water-Soluble Polymers for the Development of Cross-Linked Hydrogels for Controlled Release

Study of Collagen Hydrogel Biodegradability Over Time

Collagen-Based Hydrogels Composites from Hide Waste to Produce Smart Fertilizers

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