Comparative effects of organic and inorganic bio-fillers on the hydrophobicity of polylactic acid

Fabrication of industrially valuable PLA based coated abrasive and packaging products are made using bio-polymeric blends of PLA-PEG without involving the use of hazardous halogen based solvents, such as, chloroform and dichloromethane. Accordingly, an attempt has been made in our study to substitute a relatively less harmful ethyl acetate (EA) solvent in place of the toxic halogenated solvents to dissolve both PLA and PEG polymer blends to produce an environmentally safe PLA-PEG coating and film formulation in EA. This attempt in turn eliminates and replaces the use of non-degradable polymer coatings, (such as, acrylates, PVC, and synthetic latex) on Kraft paper thereby contributing to sustainability and environmental safety besides reduction in waste disposal to realize a cleaner environment. PLA is a hard and brittle polymer, which restricts its unexplored industrial user applications. On the other hand, PEG toughens the brittle PLA due to its plasticizing action. Hence, PLA-PEG polymer blends were prepared using increasing percentage of PEG content systematically from 5% to 25% and the % of PEG in PLA was optimized to 10% to get the maximum toughening effect in PLA-PEG formulation, which is ascertained by differential scanning calorimetry analysis. FTIR analysis confirmed the possible interaction that occurred between PLA and PEG, due to which a shift in vibration frequency of the PLA carbonyl group is observed. The other important test results from mechanical properties, contact angle, surface roughness, Cobb values, WVTR, and SEM analysis support to reveal that PLA-PEG (10%) blend is the best coating and film forming material on Kraft paper for the fabrication of industrially valuable both coated abrasive and packaging products to demonstrate its dual purpose applications.

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“…Similar findings with regard to the reduction in CH 3 chemical group was noticed by Abraham K. Aworinde. 15…”

Section: Fourier Transform-infrared Spectroscopymentioning

confidence: 99%

Development of dual purpose, industrially important PLA–PEG based coated abrasives and packaging materials

Sundar

Stanley

Kumar

et al. 2021

J of Applied Polymer Sci

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“…The unreinforced polylactide, chitosan reinforced polylactide, chitin reinforced polylactide, and titanium reinforced polylactide have been abbreviated to PLA, PLA/Ch, PLA/Ct and PLA/Ti respectively for the purpose of terseness. The choice of chitin and chitosan, as reinforcements, is based on their hydrophobicity-reduction tendencies [1] and track record in the biomedical applications [2] , [3] , [4] . Ti-6Al-2Sn-2Mo-2Cr-0.25Si was considered as a filler because all its alloying elements are biocompatible.…”

Section: Data Descriptionmentioning

confidence: 99%

Comprehensive data on the mechanical properties and biodegradation profile of polylactide composites developed for hard tissue repairs

et al. 2020

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Polylactide (PLA), a biopolymer, was reinforced with three fillers (two organic reinforcements and one inorganic filler). The processing technique used to fabricate the composites was the melt-blending technique. The composites and the unreinforced PLA were subjected to microhardness, compression and biodegradation characterisations. Data obtained are presented in this article as raw data. Data from microhardness and compression tests were used to predict the fracture toughness. The biodegradation of the composites was also examined, and the data obtained reported in this article. The data presented in this article allow for a comprehensive understanding of the mechanical behaviour and the biodegradation profile of three composites of PLA with respect to their applications as biodegradable implants. It also helps in the selection of fillers for biopolymers such as PLA.

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“…However, there is a need to improve on some of its drawbacks in order to give it a wider area of applications (Abreu et al, 2017). Researchers, in recent years, have worked to improve on its hydrophobicity (Aworinde et al, 2020a;Hendrick & Frey, 2014;Kurzina et al, 2020;Qi et al, 2019), modulus of elasticity (Adeosun et al, 2016;Aworinde et al, 2020b;Wang et al, 2016), brittleness (Kunwar et al, 2012;Liu & Zhang, 2011;Sennan & Pumchusak, 2014;Song et al, 2014), and so on. Notwithstanding the efforts that have been deployed to widen the areas of application of PLA through properties modification, there appears to be a need for more intense characterisation.…”

Section: Introductionmentioning

confidence: 99%

Polylactide and its Composites on Various Scales of Hardness

Aworinde¹,

Emagbetere²,

Adeosun³

et al. 2021

JST

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Polylactide (PLA) has become a widely applied material. Its hardness property has, however, not been a subject of intense study. This study attempts to examine the hardness values of Polylactide and its composites on ten hardness scales. Polylactide composites were developed using three reinforcements (i.e., chitosan, chitin, and titanium powders). The compositing method was the melt-blending technique. Vickers microindentation test was carried out on all the developed samples. The experimental values obtained were related to nine (9) other scales of hardness via an online reference interface. Results showed that the Brinell and Rockwell hardness scales agreed, to a large extent, with the experimental values from several studies. Hence, this work can serve as a reference material on the Brinell and Rockwell hardness values of the unreinforced and reinforced composites considered in this study. The developed materials were also represented on the Mohs scale of hardness with unreinforced PLA having the least value of hardness which corresponds to the value of gypsum on the Mohs scale while the PLA reinforced with 8.33 weight (wt.) % of titanium powder has the highest value of hardness corresponding to the value of a material in-between calcite and fluorite. The hardness values obtained on Shore scleroscope could not agree with the experimental values from various studies. Succinctly, the three particulate fillers increased the hardness properties of PLA. The results of this study would go a long way in helping industrialists and researchers in the correct applications of PLA and its composites.

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Comparative effects of organic and inorganic bio-fillers on the hydrophobicity of polylactic acid

Cited by 34 publications

References 9 publications

Development of dual purpose, industrially important PLA–PEG based coated abrasives and packaging materials

Development of dual purpose, industrially important PLA–PEG based coated abrasives and packaging materials

Comprehensive data on the mechanical properties and biodegradation profile of polylactide composites developed for hard tissue repairs

Polylactide and its Composites on Various Scales of Hardness

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