Valorization of starch nanoparticles on microstructural and physical properties of <scp>PLA</scp>‐starch nanocomposites

Nguyen, Thi Phuong Thao; Nguyen, Duc Vien; Thuc, Chi Nhan Ha; Bui, Quoc-Bao; Perré, Patrick; Nguyen, Dang Mao

doi:10.1002/app.51757

Cited by 6 publications

(4 citation statements)

References 72 publications

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“…Thus, PLLA/St composites with better mechanical properties can be achieved under certain conditions. [116][117][118][119][120][121] 123 Zhang et al developed a PLLA/St blend with layer-like microstructure through a pressure-induced flow method. They revealed that impact strength was enhanced by 200%.…”

Section: Blendingmentioning

confidence: 99%

“…By manipulating the ratio of polymer or plasticiser, the PLLA/St blend can be targeted at the dispersed St phase, PLLA continuous phase, or both. Thus, PLLA/St composites with better mechanical properties can be achieved under certain conditions 116–121 . Wu et al used acrylic acid grafted PLLA (PLLA‐ g ‐AA) to prepare PLLA‐ g ‐AA/St composites.…”

Section: Modification Of Pllamentioning

confidence: 99%

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Mechanical and gas permeability properties of poly(L‐lactic acid)–based films and their application in fresh produce preservation—Review

Yun,

Liu,

et al. 2024

Packag Technol Sci

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Plastics have remained the best choice for fruit and vegetable packaging due to their exceptional transparency, flexibility, optional good barrier and cost‐effectiveness. However, a large number of plastics end up in the environment after serving their intended purpose and persist there for centuries. Since worldwide attention to environmental issues has become an irreversible historical trend, cost‐effective renewable biodegradable packaging material is highly desirable for the packaging industry to satisfy both industrial demands as well as consumer expectations. Poly (L‐lactic acid) (PLLA), a renewable biodegradable polymer derived from biomass, has been widely studied as a very attractive polymer for food packaging applications. However, its brittle nature and medium CO2/O2 permeability are not friendly for its utilisation in the aspect of fresh agricultural products packaging. In such a context, great efforts have been devoted to improvements in the mechanical and permeability of PLLA to meet the requirements of food packaging. The main purpose of the review is to summarise the mechanical and permeability properties of composite films developed by the incorporation of toughness reinforcing agents into the PLLA matrix. The elongation at break of PLA can be increased up to 250 times by modification, and the CO2 permeability of PLA can be increased by 2–3 times by modification. We also elaborate on studies of the preservation effect of PLLA composite films on fresh fruits and vegetables.

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Section: Blendingmentioning

confidence: 99%

Section: Modification Of Pllamentioning

confidence: 99%

Mechanical and gas permeability properties of poly(L‐lactic acid)–based films and their application in fresh produce preservation—Review

Yun,

Liu,

et al. 2024

Packag Technol Sci

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“…Talc has flat geometry with a larger surface area, which can inhibit water penetration into the starch matrix to a certain degree. Previous research has reported that different insoluble fillers, such as mineral fillers, [58][59][60][61] cellulose, 16,[62][63][64] even oxidized starch particles 6,45 could reduce the moisture sensitivity of starch straw. However, when the content of talc is high, the gaps between the talc particles and starch can enhance water penetration, resulting in a correlation balance.…”

Section: Physical Barrier By Talcmentioning

confidence: 99%

Improving water resistance property of starch straw by synergistic effects of chemical crosslinking, physical barrier, and surface modifications

Yang,

Fu,

Alee

et al. 2023

J of Applied Polymer Sci

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Starch straws are developed by focusing on improving the critical weakness of all starch-based materials: moisture sensitivity. Various technologies including blending (with hydrogel carrageen), chemical crosslinking (using citric and boric acids, and furfural), physical barrier (using talc), and surface modifications (by adding stearic acid, or hot oxalic acids) are evaluated, and then synergized in this study. The materials and products are characterized by Fourier transform infrared spectroscopy, contact angle, mechanical properties, water solubility and water absorption. All the trends of individual modification are similar to previous work but it was found that the influence of some modifications on the extruded straws was significantly different from that of the casting films reported previously since extrusion with high shear stress can destroy chemical and physical crosslinking or network formed. It was found that there was a maximum acid content to improve the water sensitivity since the excessive amount of acid could degrade starch and have more damage to the crosslinking during extrusion, resulting in decreasing mechanical properties and increasing solubility. On the other hand, some synergic functions, like crosslinked by additional citric acid and surface treatment by hot oxalic acid, were observed. The promising starch straws are developed based on synergic methodologies, in which typical samples were prepared by crosslinking using citric (1 w%), boric (2 w%), talc (3 w%), and stearic acids (1 w%) and treated with hot oxalic acids for 2 s. The optimized straw can be smoothly processed, reduced water absorption significantly (55.3%), and mechanical properties (modulus) increased about 54% compared with neat starch one after being immersed in water at room temperature (25 C) for 20 min. This synergic strategy provides a useful guideline for developing starch-based materials with low moisture sensitivity.

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“…Starch, as a natural polymer material, has a wide range of sources characterized by low cost. Polylactic acid is blended with starch, which can partially replace polylactic acid to reduce production costs and improve biodegradability [4][5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and injection molding processability of glass fiber modified polylactic acid composites

Liu

Qiu

Wang

et al. 2022

J. Phys.: Conf. Ser.

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In order to promote the development and application of environment-friendly plastics, a glass fiber-modified starch/polylactic acid composite was prepared by the melt extrusion method. The influence of glass fiber content on the mechanical and thermal properties of the composite was studied, and multi-objective optimization of the injection molding process was carried out with consideration of the influence of material properties. The results show that with the increase of glass fiber content from 0 to 5%, the tensile strength of the composite decreases first and then increases to an average of 60Mpa, which is about 30% higher than that of pure polylactic acid. The elastic modulus and thermal stability increase, while the elongation at break and flow rate decrease with the increase of glass fiber content. In addition, the optimized injection parameters are obtained, which can effectively reduce the warping deformation, volume shrinkage, and residual stress of injection parts. Glass fiber modified starch/polylactic acid composites show great potential in engineering application, and may provide a reference for the development and application of high-performance and green degradable materials.

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Valorization of starch nanoparticles on microstructural and physical properties of PLA‐starch nanocomposites

Cited by 6 publications

References 72 publications

Mechanical and gas permeability properties of poly(L‐lactic acid)–based films and their application in fresh produce preservation—Review

Mechanical and gas permeability properties of poly(L‐lactic acid)–based films and their application in fresh produce preservation—Review

Improving water resistance property of starch straw by synergistic effects of chemical crosslinking, physical barrier, and surface modifications

Mechanical properties and injection molding processability of glass fiber modified polylactic acid composites

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