Degradation and flammability of bioplastics based on PLA and lignin

Podkościelna, Beata; Gargol, Mateusz; Goliszek, Marta; Klepka, Tomasz; Sevastyanova, Olena

doi:10.1016/j.polymertesting.2022.107622

Cited by 22 publications

(8 citation statements)

References 46 publications

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“…The phenomenon should be closely related to the free hydroxyl groups on the surface of HNTs and the entrained moisture in the cavity of HNTs, which accelerates the thermal decomposition of PLA. [ 41,42 ] In addition, the space between PLA and HNTs allows the accumulation of volatile pyrolysis products of PLA, thereby accelerating degradation, [ 43 ] which is further supported by the lack of close contact between HNTs and PLA in SEM. However, PMMA‐HNTs were uniformly dispersed in PLA and tightly bound to the matrix.…”

Section: Resultsmentioning

confidence: 99%

Preparation of intercalating halloysite by in situ synthesized polymethyl methacrylate and its effects on the crystallization behaviors and mechanical properties of polylactic acid composites

et al. 2022

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Polylactic acid/halloysites (PLA/HNTs) composites with different nanotube contents were prepared by solution blending. Using unmodified HNTs and polymethyl methacrylate intercalated halloysites (PMMA-HNTs), their structures and properties were comparatively investigated. It is found that the glass transition temperature (T g ) of the composites is lower than that of pure PLA.In addition, both HNTs and PMMA-HNTs promoted the crystallization of PLA. However, due to the good dispersion of PMMA-HNTs in the matrix, the crystallinity of PMMA-HNTs-modified PLA is higher than that of HNTsmodified PLA loaded with the same nanoparticles. The study on the mechanical properties of PMMA-HNTs and HNTs-modified PLA composites suggested that when the content of PMMA-HNTs was not higher than 4 wt%, it could simultaneously improve the elongation at break and tensile strength. Thermal stability studies showed that the T 5% and T max of the two composites did not improve significantly, but the amount of carbon residues increased. This study provides a new strategy for modifying HNTs and preparing PLA composites with good comprehensive properties.

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Section: Resultsmentioning

confidence: 99%

Preparation of intercalating halloysite by in situ synthesized polymethyl methacrylate and its effects on the crystallization behaviors and mechanical properties of polylactic acid composites

et al. 2022

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“…The aromatic structure of lignin, which results in a high charring capacity (50%-60%), also means that lignin may improve the flame retardancy of thermoplastics. 81,82 Podko scielna et al 83 prepared PLA/lignin composites using a melt blending method as a means of improving the thermal properties and flammability of PLA-based composites. The effect of natural flame retardant additives on the flammability of PLA-based composites was assessed by adding the natural flame retardant silicon dioxide (SiO 2 ).…”

Section: Natural Organic Materialsmentioning

confidence: 99%

A review of research and application of polylactic acid composites

Lin

Liu

et al. 2022

J of Applied Polymer Sci

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Polylactic acid (PLA) is a thermoplastic polyester that has received widespread attention for its environmentally friendly origin and excellent performance, and its potential to address the current problems of severe white pollution and scarcity of petroleum resources. This article focuses on the synthesis, modification, degradation and application of PLA. The main focus is on the modification of PLA with different environmentally friendly materials (natural organic materials, biodegradable polymers, inorganic minerals) in blends for defects such as the brittleness of PLA. In addition, the applications of PLA composites in the fields of construction, medical, packaging and oil and water separation are also introduced, which hopefully will provide some help to the promotion of PLA.

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“…Moreover, silica also resists high pressure and temperature conditions [9]. Also, silica can enhance bioplastic thermal stability [10]. The use of silica to reinforce bioplastic was observed, and the result indicated that silica could be employed as a bioplastic reinforcing material and reached tensile strength and elongation of 14.12 MPa and 30.7%, respectively [11].…”

Section: Introductionmentioning

confidence: 98%

Synthesis and Characterization of Gambas (Luffa acutangula) Peel–Based Bioplastic Reinforced by Silica

Kesuma Nirvana,

Budiyati,

Mulyaningtyas

2023

J. Kim. Sains Apl.

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Gambas (Luffa acutangula) plants contain a relatively high carbohydrate of 68.2%, whereas its peel contains 38.94% of carbohydrates and 20.6% of fibers. Gambas peels are rarely utilized and are typically discarded as food waste. Silica can be used as a filler and reinforcement material to improve the physical and mechanical properties. This study discussed synthesizing and characterizing bioplastics from Gambas peel reinforced by silica using polyvinyl alcohol (PVA) as a plasticizer with a mass of 8 g and 9 g and vinegar as a compatibilizer with volumes of 7 mL and 8 mL. The gelatinization temperature was adjusted at 85°C and 95°C. The synthesized bioplastics have improved mechanical characteristics due to the addition of PVA. The addition of vinegar as a compatibilizer revealed a homogenous mixture in surface morphological analysis. The highest performance of bioplastic samples was obtained from sample 7 with 8 mL vinegar, 9 g of PVA, and at 85°C of gelatinization temperature. The results showed that the maximum tensile strength reached 0.034 N/mm2, the elongation was 225%, the value of Young’s modulus was 0.015 N/mm2, the thermal stability reached 74.34% weight loss by heating up to 400°C, and the melting temperature reached at 220°C, the absorption of water was 37.61%, and the weight loss was 20.3% after ten days of soil burial.

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Degradation and flammability of bioplastics based on PLA and lignin

Cited by 22 publications

References 46 publications

Preparation of intercalating halloysite by in situ synthesized polymethyl methacrylate and its effects on the crystallization behaviors and mechanical properties of polylactic acid composites

Preparation of intercalating halloysite by in situ synthesized polymethyl methacrylate and its effects on the crystallization behaviors and mechanical properties of polylactic acid composites

A review of research and application of polylactic acid composites

Synthesis and Characterization of Gambas (Luffa acutangula) Peel–Based Bioplastic Reinforced by Silica

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