1
|
Tao Y, Zhang Y, Xia T, Lin N. Melt Compounding of Poly(lactic acid)-Based Composites: Blending Strategies, Process Conditions, and Mechanical Properties. Macromol Rapid Commun 2024:e2400380. [PMID: 39012274 DOI: 10.1002/marc.202400380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/27/2024] [Indexed: 07/17/2024]
Abstract
Polylactic acid (PLA), derived from renewable resources, has the advantages of rigidity, thermoplasticity, biocompatibility, and biodegradability, and is widely used in many fields such as packaging, agriculture, and biomedicine. The excellent processability properties allow for melt processing treatments such as extrusion, injection molding, blow molding, and thermoforming in the preparation of PLA-based materials. However, the low toughness and poor thermal stability of PLA limit its practical applications. Compared with pure PLA, conditions such as processing technology, filler, and crystallinity affect the mechanical properties of PLA-based materials, including tensile strength, Young's modulus, and elongation at break. This review systematically summarizes various technical parameters for melt processing of PLA-based materials and further discusses the mechanical properties of PLA homopolymers, filler-reinforced PLA-based composites, PLA-based multiphase composites, and reactive composite strategies for PLA-based composites.
Collapse
Affiliation(s)
- Yiwen Tao
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Yue Zhang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Tao Xia
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Ning Lin
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P. R. China
| |
Collapse
|
2
|
Song L, Chi W, Zhang Q, Ren J, Yang B, Cong F, Li Y, Wang W, Li X, Wang Y. Improvement of properties of polylactic acid/polypropylene carbonate blends using epoxy soybean oil as an efficient compatibilizer. Int J Biol Macromol 2023; 253:127407. [PMID: 37832613 DOI: 10.1016/j.ijbiomac.2023.127407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023]
Abstract
Epoxidized soybean oil (ESO) was used as a compatibilizer and blended with polylactic acid (PLA) and polypropylene carbonate (PPC) resin to prepare a series of PLA/PPC/ESO blends with varying compositions. The influence of the variation in the amount of ESO added to the blend system on the thermal properties, optical properties, rheological properties, mechanical properties, and microscopic morphology of the blends was studied. The research indicates that ESO can react with PLA and PPC to form a chemical bond interface, which improves the compatibility of PLA and PPC to a certain extent. With the increase in the amount of ESO added to the blend (1- 5 phr), the complete decomposition temperature, storage modulus, loss modulus, complex viscosity, notched impact strength, and elongation at break of the blend all show a trend of continuous increase. At the same time, the melt flow rate, light transmittance, and tensile strength of the blend do not show significant fluctuations. When the amount of ESO in the system is 5 phr, compared with the PLA/PPC blend, the notched impact strength and elongation at break of the PLA/PPC/ESO blend increase from 4270.3 J/m2, 43.89 % to 8560.4 J/m2, 211.28 %, respectively, and its tensile strength and transmittance still remain around 63 MPa, 92 %. This improves the toughness of the blend while maintaining its rigidity, demonstrating excellent mechanical and optical properties. At this time, the microscopic morphology of the fracture surface of the impact sample also shows obvious characteristics of tough fracture. However, when the amount of ESO added to the blend is excessive (6 phr), the compatibility of the blending system decreases, which will degrade the performance of the blending material and ultimately destroy the phase morphology of the blend and reduce its mechanical properties.
Collapse
Affiliation(s)
- Lixin Song
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Weihan Chi
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Qian Zhang
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Jiannan Ren
- AVIC Shenyang Aircraft Corporation, Shenyang 110850, China
| | - Bing Yang
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Fei Cong
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yongchao Li
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Wei Wang
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Xianliang Li
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yuanxia Wang
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| |
Collapse
|
3
|
Effect of molecular structure of PEG/PCL multiblock copolymers on the morphology and interfacial properties of PLA/PCL blends. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03239-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
4
|
Korelidou A, Domínguez-Robles J, Magill ER, Eleftheriadou M, Cornelius VA, Donnelly RF, Margariti A, Larrañeta E. 3D-printed reservoir-type implants containing poly(lactic acid)/poly(caprolactone) porous membranes for sustained drug delivery. BIOMATERIALS ADVANCES 2022; 139:213024. [PMID: 35908473 DOI: 10.1016/j.bioadv.2022.213024] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 12/22/2022]
Abstract
Implantable drug delivery systems are an interesting alternative to conventional drug delivery systems to achieve local or systemic drug delivery. In this work, we investigated the potential of fused-deposition modelling to prepare reservoir-type implantable devices for sustained drug delivery. An antibiotic was chosen as a model molecule to evaluate the potential of this type of technology to prepare implants on-demand to provide prophylactic antimicrobial treatment after surgery. The first step was to prepare and characterize biodegradable rate-controlling porous membranes based on poly(lactic acid) (PLA) and poly(caprolactone) (PCL). These membranes were prepared using a solvent casting method. The resulting materials contained different PLA/PCL ratios. Cylindrical implants were 3D-printed vertically on top of the membranes. Tetracycline (TC) was loaded inside the implants and drug release was evaluated. The results suggested that membranes containing a PLA/PCL ratio of 50/50 provided drug release over periods of up to 25 days. On the other hand, membranes containing lower PCL content did not show a porous structure and accordingly the drug could not permeate to the same extent. The influence of different parameters on drug release was evaluated. It was established that film thickness, drug content and implant size are critical parameters as they have a direct influence on drug release kinetics. In all cases the implants were capable of providing drug release for at least 25 days. The antimicrobial properties of the implants were evaluated against E. coli and S. aureus. The resulting implants showed antimicrobial properties at day 0 and even after 21 days against both type of microorganisms. Finally, the biocompatibility of the implants was evaluated using endothelial cells. Cells exposed to implants were compared with a control group. There were no differences between both groups in terms of cell proliferation and morphology.
Collapse
Affiliation(s)
- Anna Korelidou
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Juan Domínguez-Robles
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Elizabeth R Magill
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Magdalini Eleftheriadou
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Victoria A Cornelius
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Ryan F Donnelly
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Andriana Margariti
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK.
| | - Eneko Larrañeta
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK.
| |
Collapse
|
5
|
Development and Characterization of Polylactide Blends with Improved Toughness by Reactive Extrusion with Lactic Acid Oligomers. Polymers (Basel) 2022; 14:polym14091874. [PMID: 35567043 PMCID: PMC9104828 DOI: 10.3390/polym14091874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/26/2022] [Accepted: 04/29/2022] [Indexed: 02/05/2023] Open
Abstract
In this work, we report the development and characterization of polylactide (PLA) blends with improved toughness by the addition of 10 wt.% lactic acid oligomers (OLA) and assess the feasibility of reactive extrusion (REX) and injection moulding to obtain high impact resistant injection moulded parts. To improve PLA/OLA interactions, two approaches are carried out. On the one hand, reactive extrusion of PLA/OLA with different dicumyl peroxide (DCP) concentrations is evaluated and, on the other hand, the effect of maleinized linseed oil (MLO) is studied. The effect of DCP and MLO content used in the reactive extrusion process is evaluated in terms of mechanical, thermal, dynamic mechanical, wetting and colour properties, as well as the morphology of the obtained materials. The impact strength of neat PLA (39.3 kJ/m2) was slightly improved up to 42.4 kJ/m2 with 10 wt.% OLA. Nevertheless, reactive extrusion with 0.3 phr DCP (parts by weight of DCP per 100 parts by weight of PLA–OLA base blend 90:10) led to a noticeable higher impact strength of 51.7 kJ/m2, while the reactive extrusion with 6 phr MLO gave an even higher impact strength of 59.5 kJ/m2, thus giving evidence of the feasibility of these two approaches to overcome the intrinsic brittleness of PLA. Therefore, despite MLO being able to provide the highest impact strength, reactive extrusion with DCP led to high transparency, which could be an interesting feature in food packaging, for example. In any case, these two approaches represent environmentally friendly strategies to improve PLA toughness.
Collapse
|
6
|
Li Y, Cheng H, Yu M, Han C, Shi H. Blends of biodegradable poly(ε-caprolactone) and sustainable poly(propylene carbonate) with enhanced mechanical and rheological properties. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-021-04931-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
7
|
Carvalho JRG, Conde G, Antonioli ML, Santana CH, Littiere TO, Dias PP, Chinelatto MA, Canola PA, Zara FJ, Ferraz GC. Long-Term Evaluation of Poly(lactic acid) (PLA) Implants in a Horse: An Experimental Pilot Study. Molecules 2021; 26:7224. [PMID: 34885807 PMCID: PMC8658935 DOI: 10.3390/molecules26237224] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/21/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022] Open
Abstract
In horses, there is an increasing interest in developing long-lasting drug formulations, with biopolymers as viable carrier alternatives in addition to their use as scaffolds, suture threads, screws, pins, and plates for orthopedic surgeries. This communication focuses on the prolonged biocompatibility and biodegradation of PLA, prepared by hot pressing at 180 °C. Six samples were implanted subcutaneously on the lateral surface of the neck of one horse. The polymers remained implanted for 24 to 57 weeks. Physical examination, plasma fibrinogen, and the mechanical nociceptive threshold (MNT) were performed. After 24, 28, 34, 38, and 57 weeks, the materials were removed for histochemical analysis using hematoxylin-eosin and scanning electron microscopy (SEM). There were no essential clinical changes. MNT decreased after the implantation procedure, returning to normal after 48 h. A foreign body response was observed by histopathologic evaluation up to 38 weeks. At 57 weeks, no polymer or fibrotic capsules were identified. SEM showed surface roughness suggesting a biodegradation process, with an increase in the median pore diameter. As in the histopathological evaluation, it was not possible to detect the polymer 57 weeks after implantation. PLA showed biocompatible degradation and these findings may contribute to future research in the biomedical area.
Collapse
Affiliation(s)
- Júlia Ribeiro Garcia Carvalho
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| | - Gabriel Conde
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| | - Marina Lansarini Antonioli
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| | - Clarissa Helena Santana
- Veterinary School, Federal University of Minas Gerais—UFMG, 31270-901 Belo Horizonte, Minas Gerais, Brazil;
| | - Thayssa Oliveira Littiere
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| | - Paula Patrocínio Dias
- São Carlos School of Engineering—EESC, University of São Paulo—USP, 13566-590 São Carlos, São Paulo, Brazil; (P.P.D.); (M.A.C.)
| | - Marcelo Aparecido Chinelatto
- São Carlos School of Engineering—EESC, University of São Paulo—USP, 13566-590 São Carlos, São Paulo, Brazil; (P.P.D.); (M.A.C.)
| | - Paulo Aléscio Canola
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| | - Fernando José. Zara
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| | - Guilherme Camargo Ferraz
- School of Agricultural and Veterinarian Sciences—FCAV, São Paulo State University—UNESP, 14884-900 Jaboticabal, São Paulo, Brazil; (J.R.G.C.); (G.C.); (M.L.A.); (T.O.L.); (P.A.C.); (F.J.Z.)
| |
Collapse
|
8
|
Lohrasbi P, Yeganeh JK. Synergistic toughening of poly(lactic acid)/poly(ethylene vinyl acetate) (
PLA
/
EVA
) by dynamic vulcanization and presence of hydrophobic nanoparticles. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5435] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Pardis Lohrasbi
- Polymer Engineering Department Qom University of Technology Qom Iran
| | | |
Collapse
|
9
|
Oztemur J, Yalcin-Enis I. Development of biodegradable webs of PLA/PCL blends prepared via electrospinning: Morphological, chemical, and thermal characterization. J Biomed Mater Res B Appl Biomater 2021; 109:1844-1856. [PMID: 33847451 DOI: 10.1002/jbm.b.34846] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 03/23/2021] [Accepted: 03/31/2021] [Indexed: 01/02/2023]
Abstract
Biodegradable polymers have a mean role to mimic native tissues and allow cells to penetrate, grow, and proliferate with their advanced features in tissue engineering applications. The physiological, chemical, mechanical, and biological qualities of the surfaces, which are presented from biodegradable polymers, affect the final properties of the scaffolds. In this study, it is aimed to produce fibrous webs by electrospinning method for tissue engineering applications using two different biopolymers, polylactic acid (PLA) and polycaprolactone (PCL). These polymers are used either alone or in a blended form (PLA/PCL, 1/1 wt.). Within the scope of the study, polymer concentrations (6, 8 and 10%) and solvent types (used for chloroform/ethanol/acetic acid mixture, PCL and PLA/PCL mixtures, and chloroform/acetone, PLA) vary as solution parameters. Fibrous webs are investigated in terms of morphological, chemical, and thermal characteristics. Results show continuous fibers are examined for 8 or 10% polymer concentrations with an average fiber diameter of 1.3-2.7 μm and pore area of 4-9 μm2 . No fiber formation is observed in sample groups with a polymer concentration of 6% and beaded structures are formed. Water contact angle analysis proves the hydrophobic properties of PLA and PCL, whereas Fourier-transform infrared results show there is no solution residue on the surfaces, so there is no toxic effect. Also, in differential scanning calorimetry analysis, the characteristic crystallization peaks of the polymers are recognized, and when the polymers are in a blend, it beholds that they have effects on each other's crystallization.
Collapse
Affiliation(s)
- Janset Oztemur
- Textile Engineering Department, Istanbul Technical University, Istanbul, Turkey
| | - Ipek Yalcin-Enis
- Textile Engineering Department, Istanbul Technical University, Istanbul, Turkey
| |
Collapse
|
10
|
Conde G, Carvalho JRG, Dias PDP, Moranza HG, Montanhim GL, Ribeiro JDO, Chinelatto MA, Moraes PC, Taboga SR, Bertolo PHL, Gonçalves MI, Pinheiro DG, Ferraz G. In vivo biocompatibility and biodegradability of poly(lactic acid)/poly(ε-caprolactone) blend compatibilized with poly(ε-caprolactone- b-tetrahydrofuran) in Wistar rats. Biomed Phys Eng Express 2021; 7. [PMID: 33652429 DOI: 10.1088/2057-1976/abeb5a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 03/02/2021] [Indexed: 11/11/2022]
Abstract
Poly(lactic acid) (PLA) and poly(ɛ-caprolactone) (PCL) are two important aliphatic esters known for their biodegradability and bioresorbability properties; the former is stiffer and brittle while the smaller modulus of the latter allows a suitable elongation. The new biomaterials being developed from the blend of these two polymers (PLA and PCL) is opportune due to the reducing interfacial tension between their immiscible phases. In a previous study, PLA/PCL immiscible blend when compatibilized with poly(ε-caprolactone-b-tetrahydrofuran) resulted in enhanced ductility and toughness no cytotoxic effect in vitro tests. There is little published data on the effect of poly(ε-caprolactone-b-tetrahydrofuran) on PLA and PCL biocompatibility and biodegradability in vivo tests. This study focuses on evaluating the behavioral response and polymer-tissue interaction of compatibilized PLA/PCL blend compared to neat PLA implanted via intraperitoneal (IP) and subcutaneous (SC) in male Wistar rats, distributed in four experimental groups: neat PLA, PLA/PCL blend, sham, and control at 2-, 8- and 24-weeks post-implantation (WPI). Open-field test was performed to appraise emotionality and spontaneous locomotor activity. Histopathological investigation using hematoxylin-eosin (H&E) and picrosirius-hematoxylin (PSH) was used to assess polymer-tissue interaction. Modifications in PLA and the PLA / PCL blend's surface morphology were determined by scanning electron microscopy (SEM). PLA group defecated more often than PLA/PCL rats 2 and 8 WPI. Conjunctive capsule development around implants, cell adhesion, angiogenesis, and giant cells of a foreign body to the biomaterial was observed in light microscopy. Both groups displayed a fibrous reaction along with collagen deposition around the biomaterials. In the SEM, the images showed a higher degradation rate for the PLA/PCL blend in both implantation routes. The polymers implanted via IP exhibited a higher degradation rate compared to SC. These findings emphasize the biocompatibility of the PLA/PCL blend compatibilized with poly(ε-caprolactone-b-tetrahydrofuran), making this biopolymer an acceptable alternative in a variety of biomedical applicatio.
Collapse
Affiliation(s)
- Gabriel Conde
- Animal Morphology and Physiology, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP - CEP 14884-900, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Julia Ribeiro Garcia Carvalho
- Animal Morphology and Physiology, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Paula do Patrocínio Dias
- Materials Engineering, USP São Carlos, Av. João Dagnone, 1100 Jd. Sta Angelina, Sao Carlos, São Paulo, 13563-120, BRAZIL
| | - Henriette Gellert Moranza
- Animal Morphology and Physiology, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Gabriel Luiz Montanhim
- Clinic and Surgery, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Juliana de Oliveira Ribeiro
- Clinic and Surgery, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Marcelo Aparecido Chinelatto
- Materials Engineering, USP São Carlos, Av. João Dagnone, 1100 Jd. Sta Angelina, Sao Carlos, São Paulo, 13563-120, BRAZIL
| | - Paola Castro Moraes
- Clinic and Surgery, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Sebastião Roberto Taboga
- Biology, UNESP IBILCESJRP, Rua Cristóvão Colombo, 2265 - Jardim Nazareth - São José do Rio Preto/SP, Sao Jose do Rio Preto, SP, 15054-000, BRAZIL
| | - Paulo Henrique Leal Bertolo
- Veterinary Pathology, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Michelli Inacio Gonçalves
- Technology Department, UNESP, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP - CEP 14884-900, Sao Paulo, SP, 01049-010, BRAZIL
| | - Daniel Guariz Pinheiro
- Animal Morphology and Physiology, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP - CEP 14884-900, Jaboticabal, São Paulo, 14884-900, BRAZIL
| | - Guilherme Ferraz
- Animal Morphology and Physiology, UNESP Jaboticabal, Via de Acesso Prof.Paulo Donato Castellane s/n - Jaboticabal/SP, Jaboticabal, 14884-900, BRAZIL
| |
Collapse
|
11
|
Tejada-Oliveros R, Balart R, Ivorra-Martinez J, Gomez-Caturla J, Montanes N, Quiles-Carrillo L. Improvement of Impact Strength of Polylactide Blends with a Thermoplastic Elastomer Compatibilized with Biobased Maleinized Linseed Oil for Applications in Rigid Packaging. Molecules 2021; 26:molecules26010240. [PMID: 33466389 PMCID: PMC7796501 DOI: 10.3390/molecules26010240] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 12/28/2020] [Accepted: 01/01/2021] [Indexed: 11/16/2022] Open
Abstract
This research work reports the potential of maleinized linseed oil (MLO) as biobased compatibilizer in polylactide (PLA) and a thermoplastic elastomer, namely, polystyrene-b-(ethylene-ran-butylene)-b-styrene (SEBS) blends (PLA/SEBS), with improved impact strength for the packaging industry. The effects of MLO are compared with a conventional polystyrene-b-poly(ethylene-ran-butylene)-b-polystyrene-graft-maleic anhydride terpolymer (SEBS-g-MA) since it is widely used in these blends. Uncompatibilized and compatibilized PLA/SEBS blends can be manufactured by extrusion and then shaped into standard samples for further characterization by mechanical, thermal, morphological, dynamical-mechanical, wetting and colour standard tests. The obtained results indicate that the uncompatibilized PLA/SEBS blend containing 20 wt.% SEBS gives improved toughness (4.8 kJ/m2) compared to neat PLA (1.3 kJ/m2). Nevertheless, the same blend compatibilized with MLO leads to an increase in impact strength up to 6.1 kJ/m2, thus giving evidence of the potential of MLO to compete with other petroleum-derived compatibilizers to obtain tough PLA formulations. MLO also provides increased ductile properties, since neat PLA is a brittle polymer with an elongation at break of 7.4%, while its blend with 20 wt.% SEBS and MLO as compatibilizer offers an elongation at break of 50.2%, much higher than that provided by typical SEBS-g-MA compatibilizer (10.1%). MLO provides a slight decrease (about 3 °C lower) in the glass transition temperature (Tg) of the PLA-rich phase, thus showing some plasticization effects. Although MLO addition leads to some yellowing due to its intrinsic yellow colour, this can contribute to serving as a UV light barrier with interesting applications in the packaging industry. Therefore, MLO represents a cost-effective and sustainable solution to the use of conventional petroleum-derived compatibilizers.
Collapse
Affiliation(s)
| | - Rafael Balart
- Correspondence: (R.B.); (L.Q.-C.); Tel.: +34-966-528-433 (L.Q.-C.)
| | | | | | | | | |
Collapse
|
12
|
Roisman S, Dotan AL, Lewitus DY. Polycaprolactone‐based hotmelt adhesive for
hernia‐mesh
fixation. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sabrina Roisman
- Department of Polymer Materials Engineering Shenkar College Ramat‐Gan Israel
| | - Ana L. Dotan
- Department of Polymer Materials Engineering Shenkar College Ramat‐Gan Israel
| | - Dan Y. Lewitus
- Department of Polymer Materials Engineering Shenkar College Ramat‐Gan Israel
| |
Collapse
|
13
|
Carvalho JRG, Conde G, Antonioli ML, Dias PP, Vasconcelos RO, Taboga SR, Canola PA, Chinelatto MA, Pereira GT, Ferraz GC. Biocompatibility and biodegradation of poly(lactic acid) (PLA) and an immiscible PLA/poly(ε-caprolactone) (PCL) blend compatibilized by poly(ε-caprolactone-b-tetrahydrofuran) implanted in horses. Polym J 2020. [DOI: 10.1038/s41428-020-0308-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
14
|
PCO-LLDPE thermoresponsive shape memory blends. Towards a new generation of breathable and waterproof smart membranes. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.08.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
15
|
Zhao N, Lv Z, Ma J, Zhu C, Li Q. Fabrication of hydrophilic small diameter vascular foam scaffolds of poly(ε-caprolactone)/polylactic blend by sodium hydroxide solution. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.11.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
16
|
A review on processing techniques of bast fibers nanocellulose and its polylactic acid (PLA) nanocomposites. Int J Biol Macromol 2018; 121:1314-1328. [PMID: 30208300 DOI: 10.1016/j.ijbiomac.2018.09.040] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 08/15/2018] [Accepted: 09/07/2018] [Indexed: 12/11/2022]
Abstract
The utilization of nanocellulose has increasingly gained attentions from various research fields, especially the field of polymer nanocomposites owing to the growing environmental hazardous of petroleum based fiber products. Meanwhile, the searching of alternative cellulose sources from different plants has become the interests for producing nanocellulose with varying characterizations that expectedly suit in specific field of applications. In this content the long and strong bast fibers from plant species was gradually getting its remarkable position in the field of nanocellulose extraction and nanocomposites fabrications. This review article intended to present an overview of the chemical structure of cellulose, different types of nanocellulose, bast fibers compositions, structure, polylactic acid (PLA) and the most probable processing techniques on the developments of nanocellulose from different bast fibers especially jute, kenaf, hemp, flax, ramie and roselle and its nanocomposites. This article however more focused on the fabrication of PLA based nanocomposites due to its high firmness, biodegradability and sustainability properties in developed products towards the environment. Along with this it also explored a couple of issues to improve the processing techniques of bast fibers nanocellulose and its reinforcement in the PLA biopolymer as final products.
Collapse
|
17
|
Botlhoko OJ, Ramontja J, Ray SS. A new insight into morphological, thermal, and mechanical properties of melt-processed polylactide/poly(ε-caprolactone) blends. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.05.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|