Modified cellulose nanocrystals based on <scp>SI‐ATRP</scp> for enhancing interfacial compatibility and mechanical performance of biodegradable <scp>PLA</scp>/<scp>PBAT</scp> blend

Sun, Minqi; Zhang, Ling; Li, Chunzhong

doi:10.1002/pc.26653

Cited by 30 publications

(14 citation statements)

References 42 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 shows the scanning electron micrographs of PPCE samples with different degrees of chain extension. Preparing high-performance PBAT/PLA melt composite samples is technically challenging due to the incompatibility of the PBAT and PLA polymers [ 39 ]. Figure 4 a shows that before the addition of CE, the interfacial adhesion of the PPCE-0 blend was poor, and the microscopic section of the system had many particles.…”

Section: Resultsmentioning

confidence: 99%

High-Strength Bio-Degradable Polymer Foams with Stable High Volume-Expansion Ratio Using Chain Extension and Green Supercritical Mixed-Gas Foaming

Long

Shaoyu

et al. 2023

Polymers

View full text Add to dashboard Cite

The preparation of biodegradable polymer foams with a stable high volume-expansion ratio (VER) is challenging. For example, poly (butylene adipate-co-terephthalate) (PBAT) foams have a low melt strength and high shrinkage. In this study, polylactic acid (PLA), which has a high VER and crystallinity, was added to PBAT to reduce shrinkage during the supercritical molded-bead foaming process. The epoxy chain extender ADR4368 was used both as a chain extender and a compatibilizer to mitigate the linear chain structure and incompatibility and improve the foamability of PBAT. The branched-chain structure increased the energy-storage modulus (G’) and complex viscosity (η*), which are the key factors for the growth of cells, by 1–2 orders of magnitude. Subsequently, we innovatively used the CO2 and N2 composite gas method. The foam-shrinkage performance was further inhibited; the final foam had a VER of 23.39 and a stable cell was obtained. Finally, after steam forming, the results showed that the mechanical strength of the PBAT/PLA blended composite foam was considerably improved by the addition of PLA. The compressive strength (50%), bending strength, and fracture load by bending reached 270.23 kPa, 0.36 MPa, and 23.32 N, respectively. This study provides a potential strategy for the development of PBAT-based foam packaging materials with stable cell structure, high VER, and excellent mechanical strength.

show abstract

Section: Resultsmentioning

confidence: 99%

High-Strength Bio-Degradable Polymer Foams with Stable High Volume-Expansion Ratio Using Chain Extension and Green Supercritical Mixed-Gas Foaming

Long

Shaoyu

et al. 2023

Polymers

View full text Add to dashboard Cite

show abstract

“…For example, rigid nanoparticles could act as compatibilizers to greatly reduce the size of dispersed rubber phase and thus contribute to a significant enhancement in toughening efficiency. [ 41–43 ] Meanwhile, the strength and modulus of the blends were maintained very well. Fu et al.…”

Section: Introductionmentioning

confidence: 95%

Simultaneously Toughening and Reinforcing Polylactide by Regulating the Distribution of Core–Shell Rubber Particles with Carbon Black

Liu

Yan

Cai

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

Stiffness–toughness balance is an important issue in rubber toughened polymer blends. In this work, a facile and effective route to simultaneously toughen and reinforce polylactide (PLA) by regulating the distribution of core–shell rubber (CSR) nanoparticles with carbon black (CB) is reported. The PLA/CSR/CB nanocomposites are prepared via direct melt‐blending PLA, CSR, and CB nanoparticles with different self‐aggregate capabilities. The FTIR and DFT calculation results reveal that the interactions between CB and CSR are stronger than those between CB and PLA. Thus, CB nanoparticles with high self‐aggregate capability (HCB) can drive CSR nanoparticles to join into the HCB network structures and form CSR‐HCB network structures in the PLA/CSR/HCB nanocomposites. However, for the CB nanoparticles with low self‐aggregate capability (LCB), uniform dispersion of both CSR nanoparticles and small‐sized CB clusters in the PLA/CSR/LCB nanocomposites is observed. Compared to the network structures, the uniform dispersion structure can endow PLA/CSR/CB nanocomposites with much better stiffness–toughness balance performances. Additionally, the distribution of CSR nanoparticles on the rheological properties of PLA/CSR/CB nanocomposites are studied. This work reveals significant correlations between distribution of CSR nanoparticles and properties of PLA nanocomposites, which is helpful to prepare high‐performance PLA materials.

show abstract

“…To control the blend morphology and thus balance toughness and stiffness, nanoparticles or nanofillers, such as organoclay, [ 18,19 ] carbon nanotubes/fibers, [ 20–25 ] and cellulose nanocrystals (CNCs), [ 26–28 ] have been widely used in recent years. [ 20,29 ] Therefore, the location and preferential distribution of nanoparticles in polymer blends have a crucial influence on the properties of materials, which have also attracted great interest recently.…”

Section: Introductionmentioning

confidence: 99%

The carbon nanotubes effects on the morphology and properties of poly(lactic) acid/poly(butylene adipate‐co‐terephthalate) blends

Xiao

Chunxiao

et al. 2022

Polymer Composites

View full text Add to dashboard Cite

Poly(lactic acid) (PLA), as a biodegradable semicrystalline thermoplastic, is usually blended with degradable poly(butylene-adipate-co-terephthalate) (PBAT) to improve toughness for the sake of environmental concerns. To obtain controllable properties of PLA/PBAT composites, the use of nanoparticles is increasing from a technical point of view, thus making the blends more widely used in the final products. In this study, immiscible blends of PLA and PBAT (70/30 wt%) and PLA/PBAT with different carbon nanotube (CNT) contents (0.5, 1, and 2 wt%) were prepared using a twin-screw extruder followed by injection molding. The preferential distribution of CNTs in the PBAT phase was characterized by SEM and thermodynamic analysis, and reason for selective localization is discussed. The morphology of the PLA/PBAT composite showed PBAT particles dispersed within the PLA matrix with an average diameter of 0.38 μm. For the nanocomposites, the CNTs in the minor PBAT phase produced larger elongated PBAT domains with a maximum average diameter of 1.3 μm. The elongation at break of binary PLA/PBAT blends was 160.9%, while the maximum elongation at break of the nanocomposite was 294.3%. Additionally, the influence of CNTs on the crystallization behavior and rheological and mechanical properties of PLA/PBAT/CNT blends was systematically investigated.carbon nanotubes, nanocomposites, PLA/PBAT blends, rheological, thermal and mechanical properties | INTRODUCTIONPolylactic acid (PLA), as one of the most promising biodegradable and recyclable polymers, has been extensively studied. [1][2][3] Recently, PLA products have been promoted to replace conventional petroleum-based plastics, such as polyethylene (PE), polypropylene (PP), and polystyrene (PS), due to their sustainability, eco-efficiency and high stiffness. [4,5] However, the ductility and toughness of PLA are far from satisfactory from the technological view of producing more widely used final products. Blending PLA with elastomers and/or softer polymers is deemed an economically viable way to modulate the properties. [6][7][8] Considering environmental friendliness, biobased or degradable materials are preferred, such as poly(butylene adipate-co-Zhihua Xiao and Guili Li contributed equally to this work and are considered as co-first authors.

show abstract

Modified cellulose nanocrystals based on SI‐ATRP for enhancing interfacial compatibility and mechanical performance of biodegradable PLA/PBAT blend

Cited by 30 publications

References 42 publications

High-Strength Bio-Degradable Polymer Foams with Stable High Volume-Expansion Ratio Using Chain Extension and Green Supercritical Mixed-Gas Foaming

High-Strength Bio-Degradable Polymer Foams with Stable High Volume-Expansion Ratio Using Chain Extension and Green Supercritical Mixed-Gas Foaming

Simultaneously Toughening and Reinforcing Polylactide by Regulating the Distribution of Core–Shell Rubber Particles with Carbon Black

The carbon nanotubes effects on the morphology and properties of poly(lactic) acid/poly(butylene adipate‐co‐terephthalate) blends

Contact Info

Product

Resources

About