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Zhou B, Zheng C, Zhang R, Xue S, Zheng B, Shen H, Sheng Y, Zhang H. Graphene Oxide-Enhanced and Dynamically Crosslinked Bio-Elastomer for Poly(lactic acid) Modification. Molecules 2024; 29:2539. [PMID: 38893416 PMCID: PMC11173449 DOI: 10.3390/molecules29112539] [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: 04/28/2024] [Revised: 05/23/2024] [Accepted: 05/25/2024] [Indexed: 06/21/2024] Open
Abstract
Being a bio-sourced and biodegradable polymer, polylactic acid (PLA) has been considered as one of the most promising substitutes for petroleum-based plastics. However, its wide application is greatly limited by its very poor ductility, which has driven PLA-toughening modifications to be a topic of increasing research interest in the past decade. Toughening enhancement is achieved often at the cost of a large sacrifice in strength, with the toughness-strength trade-off having remained as one of the main bottlenecks of PLA modification. In the present study, a bio-elastomeric material of epoxidized soybean oil (ESO) crosslinked with sebacic acid (SA) and enhanced by graphene oxide (GO) nanoparticles (NPs) was employed to toughen PLA with the purpose of simultaneously preserving strength and achieving additional functions. The even dispersion of GO NPs in ESO was aided by ultrasonication and guaranteed during the following ESO-SA crosslinking with GO participating in the carboxyl-epoxy reaction with both ESO and SA, resulting in a nanoparticle-enhanced and dynamically crosslinked elastomer (GESO) via a β-hydroxy ester. GESO was then melt-blended with PLA, with the interfacial reaction between ESO and PLA offering good compatibility. The blend morphology, and thermal and mechanical properties, etc., were evaluated and GESO was found to significantly toughen PLA while preserving its strength, with the GO loading optimized at ~0.67 wt%, which gave an elongation at break of ~274.5% and impact strength of ~10.2 kJ/m2, being 31 times and 2.5 times higher than pure PLA, respectively. Moreover, thanks to the presence of dynamic crosslinks and GO NPs, the PLA-GESO blends exhibited excellent shape memory effect and antistatic properties.
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Affiliation(s)
- Bingnan Zhou
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
| | - Cunai Zheng
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
| | - Ruanquan Zhang
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
| | - Shuyuan Xue
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
| | - Botuo Zheng
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
| | - Hang Shen
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China
| | - Yu Sheng
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
| | - Huagui Zhang
- Fujian Province Key Laboratory of Polymer Science, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China (Y.S.)
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Bragaglia M, Sciarretta F, Filetici P, Lettieri-Barbato D, Dassatti L, Nicoletti F, Sibilia D, Aquilano K, Nanni F. Soybean Oil-Based 3D Printed Mesh Designed for Guided Bone Regeneration (GBR) in Oral Surgery. Macromol Biosci 2024; 24:e2300458. [PMID: 38198834 DOI: 10.1002/mabi.202300458] [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: 10/08/2023] [Revised: 12/22/2023] [Indexed: 01/12/2024]
Abstract
This study aims to obtain a cyto-compatible 3D printable bio-resin for the manufacturing of meshes designed from acquired real patients' bone defect to be used in future for guided bone regeneration (GBR), achieving the goal of personalized medicine, decreasing surgical, recovery time, and patient discomfort. To this purpose, a biobased, biocompatible, and photo-curable resin made of acrylated epoxidized soybean oil (AESO) diluted with soybean oil (SO) is developed and 3D printed using a commercial digital light processing (DLP) 3D printer. 3D printed samples show good thermal properties, allowing for thermally-based sterilization process and mechanical properties typical of crosslinked natural oils (i.e., E = 12 MPa, UTS = 1.5 MPa), suitable for the GBR application in the oral surgery. The AESO-SO bio-resin proves to be cytocompatible, allowing for fibroblast cells proliferation (viability at 72 h > 97%), without inducing severe inflammatory response when co-cultured with macrophages, as demonstrated by cytokine antibody arrays, that is anyway resolved in the first 24 h. Moreover, accelerated degradation tests prove that the bio-resin is biodegradable in hydrolytic environments.
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Affiliation(s)
- Mario Bragaglia
- Department of Enterprise Engineering, University of Rome "Tor Vergata", Via del Politecnico 1, Rome, 00133, Italy
| | | | - Pierfrancesco Filetici
- Multispecialty Department of Oral Surgery - Periodontology and Implant-Prosthodontic Rehabilitation, Università Cattolica del Sacro Cuore, Largo F. Vito 1, Rome, 00168, Italy
| | | | - Leonardo Dassatti
- Multispecialty Department of Oral Surgery - Periodontology and Implant-Prosthodontic Rehabilitation, Università Cattolica del Sacro Cuore, Largo F. Vito 1, Rome, 00168, Italy
| | - Fabrizio Nicoletti
- Multispecialty Department of Oral Surgery - Periodontology and Implant-Prosthodontic Rehabilitation, Università Cattolica del Sacro Cuore, Largo F. Vito 1, Rome, 00168, Italy
| | - Diego Sibilia
- Department of Life Science and Public Health, Università Cattolica del Sacro Cuore, Largo F. Vito, 1, Rome, 00168, Italy
| | - Katia Aquilano
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca scientifica 1, Rome, 00133, Italy
| | - Francesca Nanni
- Department of Enterprise Engineering, University of Rome "Tor Vergata", Via del Politecnico 1, Rome, 00133, Italy
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Petrauskas R, Grauzeliene S, Ostrauskaite J. Thermo-Responsive Shape-Memory Dual-Cured Polymers Based on Vegetable Oils. MATERIALS (BASEL, SWITZERLAND) 2023; 17:24. [PMID: 38203878 PMCID: PMC10780134 DOI: 10.3390/ma17010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/12/2023] [Accepted: 12/17/2023] [Indexed: 01/12/2024]
Abstract
The development of thermo-responsive shape-memory polymers has attracted attention due to their ability to undergo reversible deformations based on temperature changes. Vegetable oils are confirmed to be an excellent biorenewable source of starting materials for the synthesis of polymers. Therefore, the objective of this research was to synthesize thermo-responsive shape-memory polymers based on vegetable oils by using the dual-curing technique and obtaining polymers with tailorable properties. Acrylated epoxidized soybean oil and two epoxidized vegetable oils, linseed oil and camelina oil, were chosen for dual curing with m-xylylenediamine. Rheological tests were used to analyze the curing kinetics of systems undergoing radical photopolymerization, thermal cationic polymerization, and dual-curing processes. The rheological, mechanical, and thermal characteristics of the polymers were enhanced by the second curing stage. Dual-cured vegetable oil-based polymers had shape-memory properties with a recovery ratio of 100%, making them suitable for a variety of applications, including electronics, biomedical devices, and robotics.
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Affiliation(s)
| | | | - Jolita Ostrauskaite
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania; (R.P.); (S.G.)
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Petcu V, Bărbieru A, Popa M, Lazăr C, Ciornei L, Străteanu AG, Todirică IC. Early Sowing on Some Soybean Genotypes under Organic Farming Conditions. PLANTS (BASEL, SWITZERLAND) 2023; 12:2295. [PMID: 37375920 DOI: 10.3390/plants12122295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023]
Abstract
The demand for soybeans in Europe motivates breeders, researchers, and growers to find suitable cultivars to adapt and extend the soybean crop to improper climate areas. Weed control is a crucial aspect of crop technology in organic agriculture, but particularly for soybean crops. In laboratory conditions, the cumulative stress index for seedlings was determined to identify the susceptible cultivars. A field experiment with 14 soybean accessions and 2 sowing dates was conducted under organic farming conditions over the course of three years, from 2020 to 2022. Plant population density was found to be significantly (p < 0.01 and p < 0.1) negatively correlated to the degree of resistance to low temperature as well as infestation degree with weeds (for p < 0.05 and p < 0.1), with the exception of early sowing in 2021. Yield was significantly (p < 0.05, p < 0.01, p < 0.1) correlated with plant population density, with the exception of optimal sowing in 2022. Early sowing variants emerged with vigor in the first two years, breeding lines and registered varieties showed low input, and organic agriculture systems showed low yields in the drought years of 2020 and 2022. Although early sowing even in the first two years proved to be a practice that increased the cultivars' performance, in 2022, due to the long period of chilling stress in the field, this option had negative effects on yield due to the high weed frequency. Therefore, the early sowing strategy for the soybean crop in this particular case of non-irrigated conditions in a temperate continental area proved to be a risky practice.
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Affiliation(s)
- Victor Petcu
- Centre of Studies and Research of Agroforestry Biodiversity, Academy House, Romanian Academy, 050711 Bucharest, Romania
- National Agricultural Research and Development Institute Fundulea, Călăraşi County, 915200 Fundulea, Romania
| | - Ancuța Bărbieru
- National Agricultural Research and Development Institute Fundulea, Călăraşi County, 915200 Fundulea, Romania
| | - Mihaela Popa
- National Agricultural Research and Development Institute Fundulea, Călăraşi County, 915200 Fundulea, Romania
| | - Cătălin Lazăr
- National Agricultural Research and Development Institute Fundulea, Călăraşi County, 915200 Fundulea, Romania
| | - Laurențiu Ciornei
- Centre of Studies and Research of Agroforestry Biodiversity, Academy House, Romanian Academy, 050711 Bucharest, Romania
| | - Amalia Gianina Străteanu
- Centre of Studies and Research of Agroforestry Biodiversity, Academy House, Romanian Academy, 050711 Bucharest, Romania
| | - Ioana Claudia Todirică
- Centre of Studies and Research of Agroforestry Biodiversity, Academy House, Romanian Academy, 050711 Bucharest, Romania
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Jaras J, Navaruckiene A, Ostrauskaite J. Thermoresponsive Shape-Memory Biobased Photopolymers of Tetrahydrofurfuryl Acrylate and Tridecyl Methacrylate. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2156. [PMID: 36984035 PMCID: PMC10056724 DOI: 10.3390/ma16062156] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
A series of thermoresponsive shape-memory photopolymers have been synthesized from the mixtures of two biobased monomers, tetrahydrofurfuryl acrylate and tridecyl methacrylate, with the addition of a small amount of 1,3-benzendithiol (molar ratio of monomers 0-10:0.5:0.03, respectively). Ethyl (2,4,6 trimethylbenzoyl) phenylphosphinate was used as photoinitiator. The calculated biorenewable carbon content of these photopolymers was in the range of (63.7-74.9)%. The increase in tetrahydrofurfuryl acrylate content in the photocurable resins resulted in a higher rate of photocuring, increased rigidity, as well as mechanical and thermal characteristics of the obtained polymers. All photopolymer samples showed thermoresponsive shape-memory behavior when reaching their glass transition temperature. The developed biobased photopolymers can replace petroleum-derived thermoresponsive shape-memory polymer analogues in a wide range of applications.
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