Glycidyl methacrylate functionalized star-shaped polylactide for electron beam modification of polylactic acid: Synthesis, irradiation effects and microwave-resistant studies

Pasanphan, Wanvimol; Haema, Kamonwon; Kongkaoroptham, Parichart; Phongtamrug, Suttinun; Piroonpan, Thananchai

doi:10.1016/j.polymdegradstab.2021.109619

Cited by 14 publications

(15 citation statements)

References 73 publications

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“…The initial decomposition of water of suPLA may be due to the influence of sugar-core molecules and the −OH groups at the end-chains, which can absorb water. The decomposition of water was not observed in the case of the star-shaped PLA having pentaerythritol (PETH) as a core molecule . All suPLA samples with different molar ratios showed one main step of the decomposition within a temperature range of 250–330 °C.…”

Section: Resultsmentioning

confidence: 98%

“…To be reviewed, the multibranched PLA have been prepared using different core molecules having varieties of the hydroxyl groups or polyol, such as succinic acid (SA), malic acid (MA), and citric acid (CA), 18 carbohydrate derivatives, 22 glycerol, xylitol, sorbitol, erythritol, 23 and pentaerythritol (PETH). 12,19 While examples of multibranched PLA have been proposed, most of them were synthesized from synthetic core-molecules. Table sugar, granulated sugar, and regular sugar generally refer to sucrose, a disaccharide composed of glucose and fructose.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Up to now, several approaches have been studied to improve PLA through blending, 14 composites, 15 copolymers, or changing the chemical and structural architectures. 12,16,17 One of the strategies for improving PLA is to create or introduce a multibranched structure in order to provide enhanced functionality. In addition, the compatibility, degree of crystallization, 18 functionalities, 19 rheology, thermal, 20 and mechanical 21,19 properties have been feasibly improved by using multibranched PLA as a component.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sugar-Core Synthesized Multibranched Polylactic Acid and Its Diacrylate Blends as a UV LED-Curable Coating with Enhanced Toughness and Performance

Piroonpan

Booncharoen

Pasanphan

2022

ACS Sustainable Chem. Eng.

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Exploring the application of biodegradable/bioplastic coating material for eco-friendly and sustainable packaging is one of the global challenges being tackled. In this context, we propose (i) the synthesis of multibranched polylactic acid (PLA) using table sugar mainly composed of sucrose as a core initiator, and (ii) a model formula for sugar-based PLA (suPLA) and its diacrylate blends as a UV LED-curable coating. The synthesis of suPLA through ring-opening polymerization (ROP) was optimized by sugar: l-lactide (L-LA) molar ratio, temperature, and reaction time. suPLA, with a M w of ∼1000 g/mol, was obtained with a maximum yield of around 80%. To establish a model UV LED-curable bioplastic-based coating, the suPLA with different content was formulated in tripropylene glycol diacrylate (TPGDA) as a diluent monomer. The influence of curing time (0–60 s) on double bond conversion for turning the liquid coating to a solid film of the suPLA/TPGDA blending system was assessed. Aiming to validate the influence of the curing degree, changes in the chemical function, thermal stability, glass transition temperature, crystallization temperature, and enthalpy were also characterized. By increasing the suPLA content, the tensile tests on the UV LED-cured suPLA-TPGDA films showed significant improvement in terms of toughness. The coating surface morphologies and optical properties (i.e., gloss value, color difference, yellowness, and whiteness indexes) were also determined. It is worth noting that the sugar molecule and multibranched structure play an important role in moisture absorption. The biodegradation test demonstrated that the UV LED-cured suPLA-TPGDA film exhibited biodegradation phenomena, as analyzed from CO2 production, physical appearance, changes of mass, chemical functions, and thermal stability. The current study showed that the suPLA and its diacrylate blends are promising biobased, printable, and UV LED-curable coating prototypes to create a tough film for a sustainable packaging approach in the future.

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Section: Resultsmentioning

confidence: 98%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Sugar-Core Synthesized Multibranched Polylactic Acid and Its Diacrylate Blends as a UV LED-Curable Coating with Enhanced Toughness and Performance

Piroonpan

Booncharoen

Pasanphan

2022

ACS Sustainable Chem. Eng.

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“…For SF-PEO-25/N 2 , the T m showed a slight decrease at 61.4 °C. Under irradiation, it is important to note that both chain scission and cross-linking randomly take place and the predominant mechanism depends on the polymer structure and the irradiation condition . Therefore, the complex polymer system was generated after irradiation.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Under irradiation, it is important to note that both chain scission and cross-linking randomly take place and the predominant mechanism depends on the polymer structure and the irradiation condition. 117 Therefore, the complex polymer system was generated after irradiation. The DSC data of all irradiated SF-PEO nanofibers are summarized in Table S2 (see the Supporting Information).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Strengthened Silk-Fibroin/Poly(ethylene oxide) Nonwoven Nanofibers: A Dual Green Process Using Pure Water for Electrospinning and Electron Beam-Assisted Cross-Linking

Wongkrongsak

Pangon

Pongsak

et al. 2022

ACS Sustainable Chem. Eng.

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A combination process of using pure water for electrospinning and electron beam (EB)-assisted cross-linking is proposed as a dual green route to obtain strengthened silk fibroin (SF)-based nonwoven nanofibers toward value-added healthcare or biomedical products. The first challenge is to optimize the electrospinning process using SF/poly(ethylene oxide) (PEO) in a pure water solution for the fabrication of nonwoven nanofibers. Another technological challenge is to stabilize the dissoluble SF/ PEO nonwoven nanofibers through a cross-linking network created by a free radical reaction using EB irradiation. Herein, we optimized SF/PEO combination and the electrospinning parameters for the fabrication of SF-PEO nanofibers. Under mild conditions using an aqueous solution of SF-PEO and tunable electrospinning parameters, elongated, cylindrical-shaped, and smooth SF-PEO nanofibers with a diameter of 169 ± 5 nm were obtained. The stability of the SF-PEO nanofibers could be tuned by EB irradiation with the absorbed doses in the range of 10−100 kGy. Aiming at well-defined characteristics of nanofibers, the morphology, gel fraction, kinetics of swelling behavior, chemical and packing structure, thermal and mechanical properties, cell cytotoxicity, and proliferation were characterized and relatively clarified with the influencing parameters. It is important to note that EB irradiation with a reliable sterilization dose of 25 kGy was an optimum dose for cross-linking. Upon cross-linking the SF-PEO nanofibers, the dissolution of the nanofibers reduced, they became more stable, and their mechanical properties significantly improved with an increase in ductility by ∼22-fold. The cross-linked SF-PEO nanofibers promoted cell proliferation and proved nontoxic to skin fibroblast cells (L929), and they are thus appropriate for healthcare and biomedical applications. This study shows the potential of using 3G approaches, i.e., green renewable polymers, green electrospinning, and a green EB irradiation process, for sustainable chemistry for biomedical engineering applications.

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Investigation of the characteristics and performance of compatibilized PLA/PCL blends and their nanocomposites with nanocalcium carbonate

Negaresh,

Javadi,

Garmabi

2024

J Polym Res

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Glycidyl methacrylate functionalized star-shaped polylactide for electron beam modification of polylactic acid: Synthesis, irradiation effects and microwave-resistant studies

Cited by 14 publications

References 73 publications

Sugar-Core Synthesized Multibranched Polylactic Acid and Its Diacrylate Blends as a UV LED-Curable Coating with Enhanced Toughness and Performance

Sugar-Core Synthesized Multibranched Polylactic Acid and Its Diacrylate Blends as a UV LED-Curable Coating with Enhanced Toughness and Performance

Strengthened Silk-Fibroin/Poly(ethylene oxide) Nonwoven Nanofibers: A Dual Green Process Using Pure Water for Electrospinning and Electron Beam-Assisted Cross-Linking

Investigation of the characteristics and performance of compatibilized PLA/PCL blends and their nanocomposites with nanocalcium carbonate

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