1、Simultaneous strengthening and toughening of PLA with full

Various strategies have been developed to improve the brittleness of poly (lactic acid) (PLA), most of which still suffer from the toughness-strength trade-off dilemma.

2、The Development of Poly(lactic acid) (PLA)

The widespread use of poly (lactic acid) (PLA) from packaging to engineering applications seems to follow the current global trend. The development of high-performance PLA-based blends has led to the commercial introduction of various PLA-based resins with excellent thermomechanical properties.

3、Research progress in toughening modification of poly(lactic acid)

PLA toughening, particularly modification of impact toughness through melt blending, was emphasized in this review. Reactive blending was shown to be especially effective in achieving high impact strength. The relationship between composition, morphology, and mechanical properties were summarized.

Simultaneous Improvement of Strength and Toughness of Poly (lactic acid

To retain its inherent biodegradability, simultaneously improving the strength and toughness of poly (lactic acid) (PLA) is a significant challenge. In this study, we propose an innovative multiple dynamic pressure (MDP) process that can produce pure PLA with excellent mechanical properties.

(PDF) Modifications of Poly (lactic Acid) with Blends and

This review focuses on the modification of the inherent brittleness of biodegradable poly (lactic acid) (PLA) to increase its toughness, as well as recent advances in this field. The most...

Poly (lactic Acid) Modification To Impart Toughening And Enhance

The toughness of PLA resin is synergistically enhanced by hybrid modification 20%.In summary, bio-sourced modifiers improve the toughness, stiffness, strength, and degradation of PLA resin because of synergized hybridization.

Integration Design of Toughening Agent for Poly(lactic acid) with

The toughening modification of polylactic acid (PLA), one of the most promising sustainable plastics, usually comes at the expense of other characteristic properties, such as mechanical strength, transparency, and environmental friendliness.

Enhancing the durability of poly (lactic acid) composites by

Biodegradable poly (lactic acid) (PLA) composites were prepared using an innovative combination of wood fiber (WF) and 1,3,2,4‐bis (3,4‐dimethylobenzylideno)sorbitol (DMDBS).

Poly (lactic acid) modifications

In recent times, several PLA-based technologies have emerged with an emphasis on achieving chemical, mechanical, and biological properties equivalent or superior to conventional polymers.

A Review: Research Progress in Modification of Poly (Lactic Acid) by

This paper is aimed at summarizing the research progress of modification of poly (lactic acid) with lignin and cellulose made in in recent years, with emphasis on effects of lignin and cellulose on mechanical properties, thermal stability and crystallinity on poly (lactic acid) composite materials.

Abstract: With the advancement of technology, the development of material science has gained increasing attention. Among various materials, lactic acid resin, as a promising candidate with broad application prospects, requires significant improvement in its performance and durability. This study aims to explore modification techniques to enhance the properties of lactic acid resin, enabling it to withstand more demanding usage environments and meet evolving needs.

1. Introduction Lactic acid resin, a bio-based polymer material, has attracted attention due to its renewability, eco-friendliness, and excellent biocompatibility. its practical applications are limited by challenges such as thermal stability, aging resistance, and mechanical strength, which restrict its widespread use.

2. Basic Characteristics of Lactic Acid Resin Primarily synthesized from lactic acid monomers, lactic acid resin exhibits good biodegradability and biocompatibility. It can be decomposed by microorganisms into carbon dioxide and water, minimizing ecological impact. In terms of mechanical properties, it demonstrates moderate toughness; compared to other plastics, its strength is relatively low, and its performance degrades easily under environmental stress.

3. Necessity of Durability Modification The inherent limitations of lactic acid resin constrain its application range. Enhancing its durability is critical to improving its market competitiveness. Such modifications can extend material lifespan, reduce resource consumption and environmental pollution, lower production costs, and promote sustainable development.

4. Overview of Durability Modification Methods 1. Chemical Modification

• Cross-linking Agents: Incorporating multifunctional compounds increases molecular cross-linking density, thereby improving mechanical strength and thermal stability.
• Stabilizers: Adding antioxidants and UV absorbers prevents oxidative degradation and photo-discoloration during long-term use.

2. Physical Modification

• Fiber Reinforcement: Embedding high-strength fibers like glass or carbon into the resin matrix significantly enhances mechanical properties.
• Nanofillers: Nanomaterials such as carbon nanotubes or graphene improve mechanical strength and thermal stability.

3. Bio-Modification

• Microbial Fermentation: Specific fermentation processes produce functional biopolymers, endowing lactic acid resin with novel properties.

5. Case Studies of Specific Modifications 1. Chemical Modification Cases

• Cross-linking: Copolymerizing lactic acid resin with dual-function cross-linkers forms a network structure, substantially increasing tensile strength and heat resistance.
• Stabilizers: Adding antioxidants and UV absorbers prolongs product lifespan and reduces photo-induced discoloration.

2. Physical Modification Cases

• Fiber Reinforcement: Carbon fiber-reinforced composites, fabricated via injection molding, exhibit superior mechanical performance.
• Nanofillers: Graphene-filled resins not only boost mechanical strength but also impart excellent electrical conductivity.

3. Bio-Modification Cases

• Microbial Fermentation: Antibacterial lactic acid resin, produced through targeted fermentation, effectively inhibits bacterial growth.

Durability modifications of lactic acid resin significantly enhance its mechanical and thermal properties, expanding its application scope and meeting diverse market demands. In the future, ongoing advancements in material science will further refine these techniques, delivering greater social and environmental benefits.