Anisotropic Shape Memory Behaviors of Polylactic Acid/Citric Acid–Bentonite Composite with a Gradient Filler Concentration in Thickness Direction

Fu, Lihua; Wu, Fang; Xu, Chuanhui; Cao, Tinghua; Wang, Ruimeng; Guo, Shihao

doi:10.1021/acs.iecr.8b00602

Cited by 40 publications

(28 citation statements)

References 44 publications

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“…Fu et al 85 employed citric acid modified nanoclay to reinforce PLA through solution casting to prepare shape memory nanocomposite. They reported a considerable restriction in the PLA chain segment, which supported an anisotropic force required in shape recovery.…”

Section: Preparation Of Pla Nanocompositesmentioning

confidence: 99%

Effect of rigid nanoparticles and preparation techniques on the performances of poly(lactic acid) nanocomposites: A review

Sanusi

Benelfellah

Bikiaris

et al. 2020

Polymers for Advanced Techs

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The global concern over the environmental protection and bio‐sustainability of plastic waste materials has prompted a vibrant search for renewable and biodegradable polymers in the academia and industrial sectors. Amidst other biopolymers, poly(lactic acid) (PLA) is identified as the most promising thermoplastic aliphatic polyester. PLA is derived from agricultural products with unique physical and mechanical properties that are comparable with the conventional petroleum‐derived polymers. Yet, some of the properties are insufficient for advanced materials applications. Rigid nanoparticles are incorporated in the PLA matrix to alleviate its properties for specific high‐performance applications. Here, we report various approaches of preparing functional PLA nanocomposites with emphasis on the strengths and weaknesses of each of the methods, as well as the achieved properties enhancement for a targeted application. Designing high‐performance PLA nanocomposite involves careful selection of the most appropriate nanofillers or combinations of nanofillers, preparation technique and processing parameters. Besides multi‐walled carbon nanotubes (CNT) and montmorillonite (MMT) that are prominent as nucleating agents to achieve high thermal and mechanical properties, other nanofillers like silver nanoparticles (AgNP) play critical roles in improving antibacterial and high‐performance properties of PLA.

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Section: Preparation Of Pla Nanocompositesmentioning

confidence: 99%

Effect of rigid nanoparticles and preparation techniques on the performances of poly(lactic acid) nanocomposites: A review

Sanusi

Benelfellah

Bikiaris

et al. 2020

Polymers for Advanced Techs

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show abstract

“…Polymer nanocomposites composed of polymer matrixes and nanoscale fillers have attracted numerous attention during the past decades. − Nanoparticles (e.g., silica, carbon nanotubes, clay, and graphene, etc.) have been widely exploited.…”

Section: Introductionmentioning

confidence: 99%

Dual Cross-linked Epoxidized Natural Rubber Reinforced by Tunicate Cellulose Nanocrystals with Improved Strength and Extensibility

Cao

Huang

Chen

2018

ACS Sustainable Chem. Eng.

108

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Cellulose nanocrystals have been proved to be ideal reinforcing fillers for rubber. However, the increase in tensile strength always accompanies a reduction in extensibility. In this paper, epoxidized natural rubber (ENR) nanocomposites with dual cross-linking networks by incorporating tunicate cellulose nanocrystals (t-CNs) were prepared. Carboxyl groups were introduced onto t-CNs surface via grafting reaction with maleic anhydride (MAH). Interfacial chemical reaction between carboxyl groups on modified t-CNs and epoxy groups on ENR chains led to formation of covalent cross-linking network. Hydrogen bonds between hydroxyl groups on t-CNs and epoxy groups on ENR chains served as physical cross-linking network. Therefore, uniform dispersion and improved interfacial adhesion were achieved. Meanwhile, the covalent cross-linking network could provide strength and elasticity, while the reversible physical cross-linking network could serve as sacrificing element during stretching and dissipate energy. Therefore, dual cross-linked nanocomposites showed improved strength, modulus, extensibility, and decreased hysteresis compared with sole cross-linked nanocomposites.

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“…Moreover, blending multiphase‐polymer with different nanoscaled fillers offers a higher potential for the development of multifunctional composites with low filler concentrations . Besides the functionality, using nanofillers also provides an effective way to manipulate the space arrangement of the polymer phase at the micron‐scale, without the need for substantial modifications of the mixing processes and/or investments in new chemistry methods …”

Section: Introductionmentioning

confidence: 99%

Dimensional impact of nanofillers on the micromorphology and rheology of PP/PS composites under continuous elongation flow

Zhang

Tan

Chen

et al. 2018

Polymers for Advanced Techs

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Three kinds of nanoscaled fillers, namely, zero-dimensional nanosphere titanium dioxide (TiO 2 ), one-dimensional multi-walled carbon nanotubes (MWCNTs), and twodimensional nanoplate montmorillonite (MMT), were added to the representative polypropylene (PP)/polystyrene (PS) blends by eccentric rotor extruder based on elongation flow. Confirmed from images of transmission electron microscopy and scanning electron microscopy, three kinds of nanofillers were uniformly dispersed in the blends under continuous elongation flow and the presence of nanofillers led to a marked decrease of dispersed phase size of PS. The dispersed PS particles were turned into spherical status in matrix with the addition of TiO 2 and MWCNTs and showed irregular shapes in the composites with MMT. The PS particle size of PP/ PS/MMT was decreased most obviously, dropping from 4.44 to 1.42 μm, which resulted in obvious improvements in storage modulus and complex viscosity of the composites. The results of wide-angle X-ray diffraction and dynamic mechanical analysis indicated that MMT nanoparticles were highly intercalated in PP/PS blends, which obviously improved compatibility of PP and PS. Our work certified that the two-dimensional nanoplate MMT are better compatibilizers compared with the zero-dimensional nanosphere TiO 2 and one-dimensional MWCNTs for PP/PS composites.

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Anisotropic Shape Memory Behaviors of Polylactic Acid/Citric Acid–Bentonite Composite with a Gradient Filler Concentration in Thickness Direction

Cited by 40 publications

References 44 publications

Effect of rigid nanoparticles and preparation techniques on the performances of poly(lactic acid) nanocomposites: A review

Effect of rigid nanoparticles and preparation techniques on the performances of poly(lactic acid) nanocomposites: A review

Dual Cross-linked Epoxidized Natural Rubber Reinforced by Tunicate Cellulose Nanocrystals with Improved Strength and Extensibility

Dimensional impact of nanofillers on the micromorphology and rheology of PP/PS composites under continuous elongation flow

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