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Sunesh NP, Suyambulingam I, Divakaran D, Pulikkalparambil H, Sanjay MR, Siengchin S. Pedalium murex plant-based bioplasticizer reinforced polylactic acid films: A promising approach for biodegradable fruit packaging applications. Int J Biol Macromol 2024; 270:132392. [PMID: 38754681 DOI: 10.1016/j.ijbiomac.2024.132392] [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: 11/27/2023] [Revised: 05/08/2024] [Accepted: 05/13/2024] [Indexed: 05/18/2024]
Abstract
The most likely materials for use in packaging are plastics. A lot of synthetic polymers are harming the environment. A plasticizer is required for all polymers to improve their characteristics and workability. The plasticizers come in liquid form and are also derived from fossil fuels, which are harmful to the environment. Producing functional and affordable biopolymer for packaging applications is a difficult task nowadays. The preparation of biofilm for packaging using biopolymer and bioplasticizer is the main aim of this work. The biopolymer poly L-lactic acid (PLA) is used, and the bio plasticizer is extracted from Pedalium murex plant. Chemical and mechanical methods are used to extract the plasticizer. Plasticization of polylactic acid biopolymer was done using the extracted plasticizer at additions of 1 %, 2 %, 3 %, 4 %, and 5 %. FT-IR spectroscopy, X-ray diffraction spectroscopy, and surface roughness values are used to characterise the prepared biofilms. Scanning electron spectroscopy pictures are utilised to evaluate the morphological orientation of the biofilms. Strawberries packed with biofilms are used to evaluate the barrier properties of biofilms using UV spectroscopy analysis. Thermal degradation behaviour is investigated using thermo gravimetric analysis. We examined the mechanical characteristics, such as tensile strength, elongation modulus, and elongation break percentage. The plasticizing effect of the plasticizer raises the elongation break percentage while decreasing the tensile strength and modulus. For 2 % plasticizer addition the elongation break increases and the tensile not much affected. To demonstrate biodegradability and microbial resistance, the soil degradation behaviour and antimicrobial activities were examined.
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Affiliation(s)
- Narayana Perumal Sunesh
- Department of Mechanical Engineering, Rohini College of Engineering and Technology, Palkulam, Kanyakumari, Tamil Nadu 629401, India
| | - Indran Suyambulingam
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand.
| | - Divya Divakaran
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | | | - M R Sanjay
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - Suchart Siengchin
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
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Song L, Chi W, Zhang Q, Ren J, Yang B, Cong F, Li Y, Wang W, Li X, Wang Y. High-performance and functional fully bio-based polylactic acid/polypropylene carbonate blends by in situ multistep reaction-induced interfacial control. Int J Biol Macromol 2024; 258:128799. [PMID: 38110165 DOI: 10.1016/j.ijbiomac.2023.128799] [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: 09/22/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023]
Abstract
Using a solvent-free radical grafting technique, glycidyl methacrylate (GMA) and maleic anhydride (MAH) were used as functionalized graft monomers, styrene (St) as a copolymer monomer, and grafted onto polylactic acid (PLA). A series of PLA-g-(GMA/MAH-co-St) graft copolymers were prepared by adjusting the GMA/MAH ratio. Subsequently, the prepared graft copolymers were used as a compatibilizer with PLA and polypropylene carbonate (PPC) for melt blending to prepare PLA/PPC/PLA-g-(GMA/MAH-co-St) blends. The effects of changes in the GMA/MAH ratio in the graft copolymer on the thermodynamics, rheology, optics, degradation performance, mechanical properties, and microstructure of the blend were studied. The results found that GMA, MAH, and St were successfully grafted onto PLA, and the PLA-g-(GMA/MAH-co-St) graft copolymer obtained from the reaction had a good toughening effect on the PLA/PPC blend system, which significantly improved the mechanical properties of the PLA/PPC/PLA-g-(GMA/MAH-co-St) blend without reducing its degradation performance, resulting in a biodegradable blend material with excellent comprehensive performance. In the PLA-g-(GMA/MAH-co-St) grafting reaction system, when GMA/MAH = 1.5/1.5 (w/w), the grafting degree of the graft copolymer increased most significantly, from 0.83 phr to 1.51 phr. This composition of graft copolymer can effectively improve the compatibility between PLA and PPC. The resulting PLA/PPC blend can maintain good melt flow properties (MFR of 14.51 g/10 min), high transparency, and low haze (light transmittance of 91.56 %, haze of 20.5 %), while significantly improving its thermal stability (T95%, Tmax, and Et increased by 12.87 °C, 20.33 °C, and 32.00 kJ/mol, respectively). Moreover, when introducing PLA-g-(GMA/MAH-co-St) (GMA/MAH = 1.5/1.5 (wt/wt)) graft copolymer into the system, the toughness of the PLA/PPC/PLA-g-(GMA/MAH-co-St) blend system is optimal, with the notch impact strength and fracture elongation increasing to 184.6 % and 535.4 % of the PLA/PPC blend, respectively, at which point the fracture surface of the impact sample shows a wrinkled fracture feature indicative of toughness.
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Affiliation(s)
- Lixin Song
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Weihan Chi
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Qian Zhang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
| | - Jiannan Ren
- AVIC Shenyang Aircraft Corporation, Shenyang 110850, China
| | - Bing Yang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Fei Cong
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yongchao Li
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Wei Wang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; BatteroTech Corporation Limited, Shanghai 201417, China
| | - Xianliang Li
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yuanxia Wang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
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IAEA Contribution to Nanosized Targeted Radiopharmaceuticals for Drug Delivery. Pharmaceutics 2022; 14:pharmaceutics14051060. [PMID: 35631646 PMCID: PMC9146346 DOI: 10.3390/pharmaceutics14051060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/23/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022] Open
Abstract
The rapidly growing interest in the application of nanoscience in the future design of radiopharmaceuticals and the development of nanosized radiopharmaceuticals in the late 2000′s, resulted in the creation of a Coordinated Research Project (CRP) by the International Atomic Energy Agency (IAEA) in 2014. This CRP entitled ‘Nanosized delivery systems for radiopharmaceuticals’ involved a team of expert scientist from various member states. This team of scientists worked on a number of cutting-edge areas of nanoscience with a focus on developing well-defined, highly effective and site-specific delivery systems of radiopharmaceuticals. Specifically, focus areas of various teams of scientists comprised of the development of nanoparticles (NPs) based on metals, polymers, and gels, and their conjugation/encapsulation or decoration with various tumor avid ligands such as peptides, folates, and small molecule phytochemicals. The research and development efforts also comprised of developing optimum radiolabeling methods of various nano vectors using diagnostic and therapeutic radionuclides including Tc-99m, Ga-68, Lu-177 and Au-198. Concerted efforts of teams of scientists within this CRP has resulted in the development of various protocols and guidelines on delivery systems of nanoradiopharmaceuticals, training of numerous graduate students/post-doctoral fellows and publications in peer reviewed journals while establishing numerous productive scientific networks in various participating member states. Some of the innovative nanoconstructs were chosen for further preclinical applications—all aimed at ultimate clinical translation for treating human cancer patients. This review article summarizes outcomes of this major international scientific endeavor.
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Wang L, Du J, Zhou Y, Wang Y. Safety of nanosuspensions in drug delivery. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 13:455-469. [PMID: 27558350 DOI: 10.1016/j.nano.2016.08.007] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/31/2016] [Accepted: 08/04/2016] [Indexed: 01/16/2023]
Abstract
Nanosuspension technology is currently undergoing dramatic expansion in pharmaceutical science research and development. However, most of the research efforts generally focus on formulation and potential beneficial description, while the research into potential toxicological effects and implications (i.e., in vivo safety and health effects) is lacking. This review identifies some of the key factors for studying nanosuspension safety and the potential undesired effects related to nanosuspension exposure. The key factors for discussion herein include particle characterization, preparation approach, composition, and excipients of the formulation and sterilization methods. A few comments on the primary and required safety aspects of each administration route are also reviewed.
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Affiliation(s)
- Lulu Wang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, PR China
| | - Juan Du
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, PR China
| | - Yuqi Zhou
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, PR China
| | - Yancai Wang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, PR China.
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Wang J, Wang L, Yu H, Zain-ul-Abdin, Chen Y, Chen Q, Zhou W, Zhang H, Chen X. Recent progress on synthesis, property and application of modified chitosan: An overview. Int J Biol Macromol 2016; 88:333-44. [DOI: 10.1016/j.ijbiomac.2016.04.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/17/2016] [Accepted: 04/01/2016] [Indexed: 01/12/2023]
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