Polycaprolactone-collagen hydrolysate thermoplastic blends: Processability and biodegradability/compostability

Seggiani, Maurizia; Altieri, Roberto; Puccini, Monica; Stefanelli, Eleonora; Esposito, Alessandro; Castellani, Francesco; Stanzione, Vitale; Vitolo, Sandra

doi:10.1016/j.polymdegradstab.2018.02.001

Cited by 25 publications

(22 citation statements)

References 21 publications

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“…Considering that collagen protein due to its triple helix structure has a noticeable impact in the tensile strength of bones, teeth, cartilage, tendon, fibrous matrices and elasticity to skin, the evolution of tensile strength observed in the BF-based composites may be attributed to collagen’s characteristics [ 41 ]. Providing that the inherent fibrous nature of leather waste is retained during composite processing, it could function as reinforcement for the matrix [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

et al. 2020

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Leather buffing dust (BF) is a waste from tannery which is usually disposed on landfills. The interest in using wastes as fillers or reinforcements for composites has raised recently due to environmental concerns. This study investigates the potential use of BF waste as filler for a high density polyethylene matrix (HDPE). A series of HDPE-BF composites, containing filler concentrations ranging from 20 to 50wt%, were formulated, injection molded and tested. The effect of filler contents on the mechanical properties of the composites were evaluated and discussed. Composites with BF contents up to 30wt% improved the tensile strength and Young’s modulus of the matrix, achieving similar mechanical properties to polypropylene (PP). In the case of flexural strength, it was found to be proportionally enhanced by increasing reinforcement content, maintaining high impact strength. These composites present great opportunities for PP application areas that require higher impact resistance. The materials were submitted to a series of closed-loop recycling cycles in order to assess their recyclability, being able to maintain better tensile strength than virgin HDPE after 5 cycles. The study develops new low-cost and sustainable composites by using a waste as composite filler.

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Section: Resultsmentioning

confidence: 99%

Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

et al. 2020

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“…For the same purpose, also waste protein hydrolysates such as hydrolyzed collagens (HC) from tanning industry could be used in blend with PBSA given the well-known good adhesive properties of proteins and their good melt processability. Different authors have studied blends containing HC and synthetic polymers such as polycaprolactone (PCL) [13,14], polyvinyl alcohol (PVA) [15,16], low-density polyethylene (LDPE) [17,18] and polyvinylchloride (PVC) [19] showing the positive effect of the HC on the blend processability by conventional melting-based processes.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic Blends Based on Poly(Butylene Succinate-co-Adipate) and Different Collagen Hydrolysates from Tanning Industry: I—Processing and Thermo-mechanical Properties

et al. 2020

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In this study, blends of a biodegradable thermoplastic polyester, poly (butylene succinate-co-adipate) (PBSA) with two different raw hydrolyzed collagens (HCs), derived from the tannery industry, were investigated in terms of processability, rheological, thermal and mechanical properties. HCs, obtained by alkaline (HCa) and enzymatic (HCe) hydrolysis of the solid wastes generated during the shaving of the tanned leather, were used in PBSA/HC blends, up to 20 wt% of HC, produced by melting extrusion and processed by injection molding. All the blends up to 20 wt% HCs resulted suitable for the injection molding obtaining flexible molded specimens with good tensile properties. The different secondary structure of the two HCs influenced the rheology, morphology and mechanical properties of the produced blends. In particular, HCa, due its higher content of oligopeptides and free amino-acids, showed a good compatibility with the polymeric matrix acting as a plasticizer with consequent reduction of melt viscosity with increasing its loading. The molded dog-bones specimens containing 20 wt% HCa showed a value of elongation at break of 810%. While, HCe, due its higher presence of b-sheet structures, behaved as organic filler, showing a poor interfacial interaction with PBSA with consequent decrease of the tensile properties with increasing its loading. The good processability and satisfactory mechanical properties obtained encourage the use of both investigated collagen hydrolysates in the production of thermoplastic blends and relative molded products for applications in agriculture and plant nurseries, such as pots or small containers with fertilizing properties, due the presence of HCs.

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“…These are the features that control its mechanical performance (which are particularly deficient under load bearing conditions, requiring considerable mechanical reinforcement) and its barrier characteristics (to oxygen, water vapor and other gases). The use of advanced fabrication technologies, like three-dimensional (3D) printing or electrospinning [12,13], and its blending with other polymers [14,15,16,17,18,19] or fillers [20,21,22,23], can promote the enhancement of those properties.…”

Section: Introductionmentioning

confidence: 99%

Crystalline Characteristics and Their Influence in the Mechanical Performance in Poly(ε-Caprolactone) / High Density Polyethylene Blends

et al. 2019

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Blends of poly(ε-caprolactone) (PCL) and high-density polyethylene (HDPE) have been prepared at different compositions in order to assess the effect of HDPE on gas transport and mechanical behaviors of PCL. Previous to this evaluation, a complete morphological, structural, and thermal characterization were performed using techniques, including SEM, contact angle, FTIR, differential scanning calorimetry, and X-ray diffraction with synchrotron radiation at small and wide angles. Low HDPE incorporations allow interactions to be established at interfaces in the amorphous regions and the enhancement of the mechanical performance. Consequently, the addition of a small amount of HDPE (ranging from 5 to 10 wt%) appears to be appropriate in certain bio-applications where a higher mechanical behavior is required.

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Polycaprolactone-collagen hydrolysate thermoplastic blends: Processability and biodegradability/compostability

Cited by 25 publications

References 21 publications

Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

Thermoplastic Blends Based on Poly(Butylene Succinate-co-Adipate) and Different Collagen Hydrolysates from Tanning Industry: I—Processing and Thermo-mechanical Properties

Crystalline Characteristics and Their Influence in the Mechanical Performance in Poly(ε-Caprolactone) / High Density Polyethylene Blends

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