scholarly journals The Effect Of Filler Content and Chemical Modification On The Properties Of Poly(Lactic Acid)/Pandanus Amaryllifolius Biocomposite Films

2020 ◽  
Vol 957 ◽  
pp. 012010
Author(s):  
Mohd Rasidi ◽  
Mohd Syahmie ◽  
Chew ◽  
Kang Wei ◽  
Mohd Nasib ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Chemical Modification ◽  
Filler Content ◽  
Poly Lactic Acid ◽  
Biocomposite Films ◽  
Pandanus Amaryllifolius

scholarly journals Controlled Release, Disintegration, Antioxidant, and Antimicrobial Properties of Poly (Lactic Acid)/Thymol/Nanoclay Composites

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1878
Author(s):  
Marina Ramos ◽  
Elena Fortunati ◽  
Ana Beltrán ◽  
Mercedes Peltzer ◽  
Francesco Cristofaro ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Polymer Matrix ◽  
Antimicrobial Properties ◽  
Ternary Systems ◽  
Hydroxyl Group ◽  
Poly Lactic Acid ◽  
Biocomposite Films ◽  
Food Simulant ◽  
Packaged Food ◽  
Binary And Ternary Systems

Nano-biocomposite films based on poly (lactic acid) (PLA) were prepared by adding thymol (8 wt.%) and a commercial montmorillonite (D43B) at different concentrations (2.5 and 5 wt.%). The antioxidant, antimicrobial, and disintegration properties of all films were determined. A kinetic study was carried out to evaluate the thymol release from the polymer matrix into ethanol 10% (v/v) as food simulant. The nanostructured networks formed in binary and ternary systems were of interest in controlling the release of thymol into the food simulant. The results indicated that the diffusion of thymol through the PLA matrix was influenced by the presence of the nanoclay. Disintegration tests demonstrated that the incorporation of both additives promoted the breakdown of the polymer matrix due to the presence of the reactive hydroxyl group in the thymol structure and ammonium groups in D43B. Active films containing thymol and D43B efficiently enhanced the antioxidant activity (inhibition values higher than 77%) of the nano-biocomposites. Finally, the addition of 8 wt.% thymol and 2.5 wt.% D43B significantly increased the antibacterial activity against Escherichia coli and Staphylococcus aureus 8325-4, resulting in a clear advantage to improve the shelf-life of perishable packaged food.

The Mechanical Characteristics of Straw/poly(Lactic Acid) Composite Materials

2011 ◽  
Vol 335-336 ◽  
pp. 153-156
Author(s):  
Xue Li Wu ◽  
Jian Hui Qiu ◽  
Lin Lei ◽  
Yang Zhao ◽  
Eiichi Sakai
Keyword(s):  
Thermal Stability ◽  
Grain Size ◽  
Lactic Acid ◽  
Mechanical Characteristics ◽  
Fracture Strain ◽  
Filler Content ◽  
Agricultural Wastes ◽  
Poly Lactic Acid ◽  
Effective Utilization ◽  
Thermal Stability Of

To consider the effective utilization of plastics and agricultural wastes, rice straw fibre was extracted from agricultural wastes, and then composited with polylactic acid(PLA). The thermal stability of straw/poly(lactic acid)(straw/PLA) composites decreased (Thermogravimetric Analysis, TGA). Tensile strength, fracture strain and sharply impact strength of straw/PLA were decreased with the increase of filler content and grain size of straw. Yong’s modulus were increased as the increasing of straw content.

Banana/sisal fibers reinforced poly(lactic acid) hybrid biocomposites; influence of chemical modification of BSF towards thermal properties

2015 ◽  
Vol 38 (6) ◽  
pp. 1053-1062 ◽  
Author(s):  
Balakrishnan Asaithambi ◽  
Gowri Shankar Ganesan ◽  
Srinivasan Ananda Kumar
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Chemical Modification ◽  
Poly Lactic Acid ◽  
Sisal Fibers

scholarly journals Poly(lactic acid)/Cellulose Films Produced from Composite Spheres Prepared by Emulsion-Solvent Evaporation Method

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 66 ◽  
Author(s):  
Sónia Sousa ◽  
Ana Costa ◽  
Abílio Silva ◽  
Rogério Simões
Keyword(s):  
Lactic Acid ◽  
Surface Chemistry ◽  
Solvent Evaporation ◽  
Degree Of Crystallinity ◽  
Poly Lactic Acid ◽  
Poly Vinyl Alcohol ◽  
Cellulose Films ◽  
Chemically Modified ◽  
Biocomposite Films ◽  
Biocomposite Film

The compound of poly(lactic acid) (PLA) and cellulose was made by the emulsion-solvent evaporation technique in order to obtain spheres which are then compression molded to produce a biocomposite film. The effect of the dispersant (poly(vinyl alcohol)—PVA)/PLA ratio on the spheres yield was studied. Moreover, to evaluate the effect of cellulose particle size and surface chemistry on the process yield, unbleached eucalypt kraft pulp and microcrystalline cellulose (MCC), both unmodified and physically or chemically modified were used. PLA/cellulose spheres were characterized regarding its physical properties. It was found that the spheres yield is essentially determined by the PVA/PLA ratio and the percentage of cellulose incorporation is greatly affected by the surface chemistry of cellulose. Regarding the films, DSC runs showed a significant effect of the cellulose type incorporated into PLA matrix on the cold crystallization temperature and on the degree of crystallinity of the biocomposite films. The measurement of tensile properties of the biocomposite films revealed that the strength, elongation at break and toughness (tensile energy absorption at break) of the films incorporating unmodified and chemically modified MCC were substantially improved.

scholarly journals Biocomposite films based on poly(lactic acid) and chitosan nanoparticles: Elaboration, microstructural and thermal characterization

2018 ◽  
Vol 59 (S1) ◽  
pp. E350-E360 ◽  
Author(s):  
Nibal Hijazi ◽  
Nicolas Le Moigne ◽  
Elisabeth Rodier ◽  
Martial Sauceau ◽  
Thierry Vincent ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Chitosan Nanoparticles ◽  
Thermal Characterization ◽  
Poly Lactic Acid ◽  
Biocomposite Films

Biodegradation of modified Poly(lactic acid) based biocomposite films under thermophilic composting conditions

2019 ◽  
Vol 76 ◽  
pp. 522-536 ◽  
Author(s):  
Naba Kumar Kalita ◽  
Mukesh Kumar Nagar ◽  
Chethana Mudenur ◽  
Ajay Kalamdhad ◽  
Vimal Katiyar
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Biocomposite Films

The Physical and Mechanical Properties of Biocomposite Films Composed of Poly(Lactic Acid) with Spent Coffee Grounds

2019 ◽  
Vol 824 ◽  
pp. 87-93
Author(s):  
Nattawut Suaduang ◽  
Sukunya Ross ◽  
Gareth M. Ross ◽  
Supatra Pratumshat ◽  
Sararat Mahasaranon
Keyword(s):  
Lactic Acid ◽  
Physical And Mechanical Properties ◽  
Poly Lactic Acid ◽  
Biodegradable Films ◽  
Spent Coffee Grounds ◽  
Elongation At Break ◽  
Biocomposite Films ◽  
Coffee Grounds ◽  
Twin Screw ◽  
Coffee Oil

The aim of this research was to prepare and characterize biocomposite films from poly(lactic acid) (PLA) with spent coffee grounds (SCG). PLA can be derived from renewable resources. The SCG component consists of cellulose, hemicellulose and coffee oil 10.98%. SCG can simultaneously act as plasticizer and filler in the composites that can enhance the mixing process. The PLA/SCG biocomposite films were processed by a twin-screw extruder and blow film extruder. They were prepared by using various SCG concentrations (0%, 5%, 7.5% and 10% of SCG). The Scanning Electron Microscopy (SEM) results showed that the PLA matrix with SCG was miscible and had the SCG was well good distributed. Elongation at break was increased, when the amount of SCG was increased, with the results of PLA and PLA/SCG 10% being 5.07% and 6.63% respectively, while hardness, brittleness and tensile strength decreased. UV-vis spectrophotometric measurement of PLA/SCG biocomposite films showed a considerable reduction in transmission of all UV wavelengths (UV-A, -B and -C) and visible light with increasing SCG content. Hence, in this research, SCG can be used as filler in PLA films in order to produce biodegradable films and developed as agricultural film products. The PLA/SCG biocomposite films have shown good properties and are environmentally friendly.

scholarly journals Poly(lactic Acid)–Biochar Biocomposites: Effect of Processing and Filler Content on Rheological, Thermal, and Mechanical Properties

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 892 ◽  
Author(s):  
Rossella Arrigo ◽  
Mattia Bartoli ◽  
Giulio Malucelli
Keyword(s):  
Lactic Acid ◽  
Filler Content ◽  
Processing Method ◽  
Poly Lactic Acid ◽  
Rheological Characterization ◽  
Scanning Calorimetry ◽  
Melt Mixing ◽  
Dsc Measurements ◽  
The Matrix ◽  
Filler Dispersion

Biocomposites based on poly(lactic acid) (PLA) and biochar (BC) particles derived from spent ground coffee were prepared using two different processing routes, namely melt mixing and solvent casting. The formulated biocomposites were characterized through rheological, thermal, and mechanical analyses, aiming at evaluating the effects of the filler content and of the processing method on their final properties. The rheological characterization demonstrated the effectiveness of both exploited strategies in achieving a good level of filler dispersion within the matrix, notwithstanding the occurrence of a remarkable decrease of the PLA molar mass during the processing at high temperature. Nevertheless, significant alterations of the PLA rheological behavior were observed in the composites obtained by melt mixing. Differential scanning calorimetry (DSC) measurements indicated a remarkable influence of the processing method on the thermal behavior of biocomposites. More specifically, melt mixing caused the appearance of two melting peaks, though the structure of the materials remained almost amorphous; conversely, a significant increase of the crystalline phase content was observed for solvent cast biocomposites containing low amounts of filler that acted as nucleating agents. Finally, thermogravimetric analyses suggested a catalytic effect of BC particles on the degradation of PLA; its biocomposites showed decreased thermal stability as compared with the neat PLA matrix.

scholarly journals Recent advances in compatibility and toughness of poly(lactic acid)/poly(butylene succinate) blends

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 793-810
Author(s):  
Xipo Zhao ◽  
Dianfeng Zhang ◽  
Songting Yu ◽  
Hongyu Zhou ◽  
Shaoxian Peng
Keyword(s):  
Lactic Acid ◽  
Chemical Modification ◽  
Phase Interface ◽  
Poly Lactic Acid ◽  
Butylene Succinate ◽  
Modification Method ◽  
Improvement Effect ◽  
Biodegradable Poly ◽  
High Elongation ◽  
Physical And Chemical

Abstract Poly(butylene succinate) (PBS) has good impact strength and high elongation at break. It is used to toughen biodegradable poly(lactic acid) (PLA) materials because it can considerably improve the toughness of PLA without changing the biodegradability of the materials. Therefore, this approach has become a hotspot in the field of biodegradable materials. A review of the physical and chemical modification methods that are applied to improve the performance of PLA/PBS blends based on recent studies is presented in this article. The improvement effect of PLA/PBS blends and the addition of some common fillers on the physical properties and crystallization properties of blends in the physical modification method are summarized briefly. The compatibilizing effects of nanofillers and compatibilizing agents necessary to improve the compatibility and toughness of PLA/PBS blends are described in detail. The chemical modification method involving the addition of reactive polymers and low-molecular-weight compounds to form cross-linked/branched structures at the phase interface during in situ reactions was introduced clearly. The addition of reactive compatibilizing components is an effective strategy to improve the compatibility between PLA and PBS components and further improve the mechanical properties and processing properties of the materials. It has high research value and wide application prospects in the modification of PLA. In addition, the degradation performance of PLA/PBS blends and the methods to improve the degradation performance were briefly summarized, and the development direction of PLA/PBS blends biodegradation performance research was prospected.

Sign in / Sign up

Export Citation Format

Share Document