Effect of hydrolyzed collagen on thermal, mechanical and biological properties of poly(lactic acid) bionanocomposites

Râpă, Maria; Stefan, Laura; Preda, Petruţa; Darie-Niță, Raluca Nicoleta; Gaspar‐Pintiliescu, Alexandra; Seciu, Ana‐Maria; Vasile, Cornelia; Matei, Ecaterina; Predescu, Andra Mihaela

doi:10.1007/s13726-019-00694-7

Cited by 16 publications

(7 citation statements)

References 50 publications

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“…The FT-IR spectra for prepared membranes show the characteristic adsorption bands reported for PLA ( Figure 9a) namely υC = O stretching vibration position of the COOR group at 1755 cm −1 , -CH 3 antisymmetric bending vibration at 1452 cm −1 , -C-O-C stretching vibration at 1041-1181 cm −1 , the amorphous and crystalline phases of PLA at 866 cm −1 and 755 cm −1 , respectively [36,37].…”

Section: Attenuated Total Reflectance (Atr) Fourier Transform Infrarementioning

confidence: 75%

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Bobiricǎ

Râpă

et al. 2020

Water

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New photocatalytic membranes based on polylactic acid (PLA)/TiO2 hybrid nanofibers deposited on fiberglass supports were prepared and tested for the removal of ampicillin from aqueous solutions. The electrospinning technique was used to obtain hybrid nanofibers that were deposited on three types of fiberglass with different structures, resulting in three distinct photocatalytic membranes namely fiberglass fabric plain woven-type membrane, fiberglass mat-type membrane, and fiberglass fabric one-fold edge-type membrane. The results of the photocatalytic tests showed that the highest efficiency of ampicillin removal from aqueous solution is obtained with the fiberglass fabric plain woven-type membrane. Although it has been shown that the rate of photocatalytic degradation of ampicillin is high, being practically eliminated within the first 30 min of photocatalysis, the degree of mineralization of the aqueous solution is low even after two hours of photocatalysis due to the degradation of PLA from the photocatalytic membrane. The instability of PLA in the reactive environment of the photocatalytic reactor, evidenced by morphological, mineralogical and spectroscopic analyzes as well as by kinetic studies, is closely related to the structure of the fiberglass membrane used as a support for PLA/TiO2 hybrid nanofibers.

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Section: Attenuated Total Reflectance (Atr) Fourier Transform Infrarementioning

confidence: 75%

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Bobiricǎ

Râpă

et al. 2020

Water

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“…4,18 In addition, ATBC is approved for use in food contact materials by the US Food and Drug Administration. 7,19 It was already used in the formulation of antioxidant 20 and antimicrobial 21,22 PLA films, where ATBC proved its efficiency in increasing the ductility of PLA. Furthermore, ATBC favored the dispersion of antioxidant imine-based covalent organic frameworks, 20 and synergistic plasticizing effects with antioxidant molecules, such as carvacrol or thymol could be observed.…”

Section: Introductionmentioning

confidence: 99%

Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging

Stoll

Domenek

Flôres

et al. 2020

J of Applied Polymer Sci

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Packaging materials are decisive to preserve the quality and nutritional value of food. Polylactide (PLA) is a biodegradable polymer with adequate mechanical properties for packaging applications, but its moderate oxygen barrier properties and high UV light transmission hamper its performance as packaging for oxygen‐ and light‐sensitive products. Bixin, a carotenoid with coloring and antioxidant character, was used to improve the light barrier of PLA films plasticized or not with acetyl tri‐butyl citrate (ATBC). The films were subjected to thermal treatment mimicking polymer processing temperatures. Despite more than 74 wt% of bixin degraded during heat treatment, films were still blocking up to 95% of UVA and 90% of UVB transmission. Plasticizing PLA with ATBC accelerated up to six times the bixin release into a food simulant, which allowed to reach relevant concentrations for food preservation. In conclusion, bixin is a promising natural antioxidant and UV‐shielding additive of biodegradable packaging.

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“…Collagen is an expensive material obtained from bovine and swine hides, as well as fish skins [15,16] and usually used in its native state. Collagen hydrolysate obtained by the enzymatic extraction of bovine tendons was successfully used to increase the biocompatibility and degradability of poly(lactic acid) (PLA) [17][18][19]. The main disadvantage of these PLA biocomposites is the poor compatibility between collagen hydrolysate and synthetic polymeric matrix.…”

Section: Introductionmentioning

confidence: 99%

New Nanofibers based on Protein By-Products with Bioactive Potential for Tissue Engineering

Râpă¹,

Gaidău²,

Stefan³

et al. 2020

Prime Archives in Material Science

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Concentrated collagen hydrolysate (HC10CC), rabbit collagen glue (RCG) and keratin hydrolysate (KH) were investigated in terms of their extraction from mammalian by-products and processing by electrospinning. The electrospun nanofibers were characterized by scanning electron microscopy coupled with the energy dispersive X-ray spectroscopy (SEM/EDS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FT-IR), differential scanning calorimetry (DSC), and indentation tests. The cytotoxicity of the electrospun nanofibers was conducted on L929 fibroblast cells using MTT and LDH assays and cell morphology observations. The electrospun RCG and KH nanofibers morphology showed an average size of nanofibers ranging between 44 and 410 nm, while the electrospun HC10CC nanofibers exhibited higher sizes. The ATR-FT-IR spectra performed both on extracted proteins and electrospun nanofibers showed that the triple helix structure of collagen is partially preserved. The results were in agreement with the circular dichroism analysis for protein extracts. Also, the viscoelastic properties of electrospun KH nanofibers were superior to those of electrospun RCG nanofibers. Based on both quantitative and qualitative analysis, the electrospun nanofibers were not cytotoxic, inducing a healthy cellular response. The results of new electrospun protein-based nanofibers may be useful for further research on bioactive properties of these nanofibers for tissue engineering.

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Effect of hydrolyzed collagen on thermal, mechanical and biological properties of poly(lactic acid) bionanocomposites

Cited by 16 publications

References 50 publications

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging

New Nanofibers based on Protein By-Products with Bioactive Potential for Tissue Engineering

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