Compatibilizers for biodegradable starch and poly (lactic acid) materials produced by thermoplastic injection

Silva, Samuel Camilo da; Simões, Bruno Matheus; Yamashita, Fábio; Carvalho, Fabíola Azanha de

doi:10.33448/rsd-v11i14.36521

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…There is research using extrusion as a pre-injection stage using vegetable-based materials. Mainly when producing pellets, this is the case in the study of thermoplastic starch and polylactic acid with tannins to delay biodegradation [129], to evaluate compatibilizers between polylactic acid and thermoplastic starch [130], with residues of soy, polyvinyl alcohol, and starch [131], or the use of bagasse cassava with polylactic acid for the production of tubes for seedlings [132].…”

Section: Extrusion Technologymentioning

confidence: 99%

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Pacheco,

Evangelista-Osorio,

Muchaypiña-Flores

et al. 2023

Polymers

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This review presents the advances in polymeric materials achieved by extrusion and injection molding from lignocellulosic agroindustrial biomass. Biomass, which is derived from agricultural and industrial waste, is a renewable and abundant feedstock that contains mainly cellulose, hemicellulose, and lignin. To improve the properties and functions of polymeric materials, cellulose is subjected to a variety of modifications. The most common modifications are surface modification, grafting, chemical procedures, and molecule chemical grafting. Injection molding and extrusion technologies are crucial in shaping and manufacturing polymer composites, with precise control over the process and material selection. Furthermore, injection molding involves four phases: plasticization, injection, cooling, and ejection, with a focus on energy efficiency. Fundamental aspects of an injection molding machine, such as the motor, hopper, heating units, nozzle, and clamping unit, are discussed. Extrusion technology, commonly used as a preliminary step to injection molding, presents challenges regarding fiber reinforcement and stress accumulation, while lignin-based polymeric materials are challenging due to their hydrophobicity. The diverse applications of these biodegradable materials include automotive industries, construction, food packaging, and various consumer goods. Polymeric materials are positioned to offer even bigger contributions to sustainable and eco-friendly solutions in the future, as research and development continues.

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Section: Extrusion Technologymentioning

confidence: 99%

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Pacheco,

Evangelista-Osorio,

Muchaypiña-Flores

et al. 2023

Polymers

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Reviewing the manufacturing challenges and scientific debates: Insights into the antibacterial capabilities and potential applications of PLA/ZnO nanocomposites

Dejene

2024

Journal of Thermoplastic Composite Materials

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The growing demand for antibacterial materials, particularly for biomedical and packaging applications, has prompted significant interest in biodegradable alternatives to traditional plastics. Among these, poly(lactic acid) (PLA) is a biocompatible and biodegradable polymer that is increasingly being recognized as a promising matrix material for the development of functional nanocomposites. Notably, the incorporation of zinc oxide (ZnO) nanoparticles into PLA matrices enhances their antibacterial functionality, providing effective solutions against both Gram-positive and Gram-negative bacteria. However, challenges persist in manufacturing PLA/ZnO nanocomposites, including achieving uniform nanoparticle dispersion, ensuring interfacial compatibility, and addressing scalability issues for industrial applications. Moreover, ongoing scientific debates regarding the exact antibacterial mechanisms of ZnO, such as reactive oxygen species (ROS) generation, physical disruption of bacterial membranes, and zinc ion release, complicate the efforts to optimize these materials. This review summarizes the current state of research on PLA/ZnO nanocomposites, exploring both the manufacturing challenges and the scientific discussions regarding their antibacterial mechanisms. Consequently, by identifying unresolved questions and consolidating existing knowledge, this review provides valuable insights for researchers and engineers seeking to advance the development of effective antibacterial materials, ultimately contributing to solutions to global health and environmental challenges.

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Rheological, Structural and Melt Spinnability Study on Thermo-plastic Starch/PLA Blend Biopolymers and Tensile, Thermal and Structural Characteristics of Melt Spun Fibers

Temesgen,

Großmann,

Tesfaye

et al. 2024

J. Res. Updates Polym. Sci.

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In this study, rheology, structure and melt spinnability of thermoplastic starch TPS/PLA blend compounds as well as characteristics of melt spun fibers was studied. Thermoplastic starch is further modified with tartaric acid and blends are compatibilized using graft copolymer, maleic anhydride grafted PLA. Results from rheology analysis of compounds shows significantly reduced melt flow rate MFR and reduced viscosity as a result of tartaric acid modification and compatibilization, but the viscosity was increased as TPS_TA content in the blend increased. In addition, storage modulus (G`) and loss modulus (G``) were increased with increasing TPS_TA content in the blends. Fourier transform infrared spectroscopy FTIR analysis confirmed O-H peak shifts and peak intensity changes associated to starch thermosplasticization and further peak shifts associated with more O-H bond breakages due to tartaric acid modification, indicating acid hydrolysis action of tartaric acid which agrees with results from rheology study. Melt spinning trials show the possibility of melt spinning of biopolymer fibers from blends with up to 40%w/w TPS_TA content. The melt spun fibers have diameter in range of 12.0–124.0 μm depending on take up speed and TPS_TA content. Differential scanning calorimetry DSC analysis of melt spun fibers shows glass transition Tg shifts attributed to molecular orientation and rigid amorphous TPS phase formation as well as the occurrence of double melting peaks Tm associated to different crystals resulting from induced crystallization. The overall result from this study shows the possibility of melt spinning thermoplastic starch/PLA blend biopolymers in to fibers, revealing opportunity to utilize starch biopolymer for fiber spinning. Furthermore, the results also show the need for further research engagements to get fibers with better performance.

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Compatibilizers for biodegradable starch and poly (lactic acid) materials produced by thermoplastic injection

Cited by 3 publications

References 28 publications

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Reviewing the manufacturing challenges and scientific debates: Insights into the antibacterial capabilities and potential applications of PLA/ZnO nanocomposites

Rheological, Structural and Melt Spinnability Study on Thermo-plastic Starch/PLA Blend Biopolymers and Tensile, Thermal and Structural Characteristics of Melt Spun Fibers

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