Thermal stability and crystallization behavior of cellulose nanocrystals and their poly(l-lactide) nanocomposites: effects of surface ionic group and poly(d-lactide) grafting

Xie, Qizheng; Wang, Shenglin; Chen, Xu; Zhou, Yiyang; Fang, Huagao; Li, Xueliang; Cheng, Sheng; Ding, Yunsheng

doi:10.1007/s10570-018-2086-7

Cited by 22 publications

(4 citation statements)

References 47 publications

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“…With the increase of the HAP ratio, the diffraction peaks around 16.5°, and 22.8° gradually disappeared. For NCC/HAP, peaks at 2θ values of 25.5°, 32.1°, 32.5°, 40.0°, 47.1° correspond to (002), (210), (211), (310) and (222) lattice planes of HAP, respectively [47,48,49].…”

Section: Resultsmentioning

confidence: 99%

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Sun

Yang

et al. 2019

Polymers

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Polylactic acid (PLA) is one of the most promising bio-based materials, but its inherent hydrophobicity limits its application. Although nanocellulose (NCC) is a desirable reinforcement for PLA, the poor interface compatibility between the two has been a challenge. In this work, hydroxyapatite (HAP) modified NCC was prepared, and the obtained NCC/HAP reinforcement was used to prepare PLA/NCC-HAP composites. Different ratios of NCC to HAP were studied to explore their effects on the mechanical and thermodynamic properties of the composites. When the ratio of NCC to HAP was 30/70, the tensile strength and tensile modulus of the composite film reached 45.6 MPa and 2.34 GPa, respectively. Thermogravimetric analysis results indicate that thermal stability of the composites was significantly improved compared with pure PLA, reaching 346.6 °C. The above revelations show that NCC/HAP significantly improved the interface compatibility with PLA matrix.

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Section: Resultsmentioning

confidence: 99%

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Sun

Yang

et al. 2019

Polymers

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“…The intensity of this peak increased due to the introduction of ester groups after acetylation of MFLC (Fig. 3b) [42]. The relative peak areas of MFLC and Ac-MFLC are listed in Table S3.…”

Section: Chemical Analysismentioning

confidence: 97%

Acetylation of lignin containing microfibrillated cellulose and its reinforcing effect for polylactic acid

Yetiş

Liu

Sampson

et al. 2020

European Polymer Journal

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“…Increasing demand for biocompatible, lightweight, renewable, and environmentally friendly new functional nanomaterials has recently attracted broad interest in cellulose nanocrystals (CNCs). , CNCs are derived from bulk cellulose, which comprises 25–75% of biomass, and are formed due to inherently strong inter- and intramolecular forces . The spindle-shaped isolated CNC structures can be 2–70 nm in width and from 100 nm to several micrometers in length depending on the source of bulk cellulose. , The CNCs, in their neat or self-assembled form, display extraordinary mechanical strength, , unusual thermal behavior, − ultrafast ionic conductivity, and remarkable optical properties; , thus, they have become a versatile, natural, and biocompatible alternative to ceramic-based synthetic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Driven Liquid to Soft Solid Transition of Cellulose Nanocrystal Suspensions

2020

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Cellulose nanocrystals (CNCs) have recently attracted wide interest due to their abundance, biocompatibility, and extraordinary physical properties. In particular, easy manipulation of their surface properties, hydrophilicity, and high aspect ratio make them ideal rheology modifiers; yet, the gelation mechanisms and microscopic origin of the complex rheological behavior in the presence of secondary components, such as polymers and surfactants, are far from well understood. In this work, we used light scattering, small-angle neutron scattering, and bulk rheology to study the phase behavior and mechanical behavior of aqueous CNC solutions in the presence of cationic 1-decyl trimethyl imidazolium chloride and 1-decyl trimethyl imidazolium ferric tetrachloride. The micelles of these surfactants form at similar cmc’s (about 50 mM) and adopt identical hydrodynamic sizes (on the order of a few nanometers) and prolate-shaped ellipsoids but vary in their intermicelle interactions (charged vs neutral), thus allowing us to clarify the unprecedented effect of the surfactant micelle charge on the gel behavior of the aqueous CNC–surfactant complexes. Our results show that the positively charged micelles greatly strengthen the gel network while excessive free micelles weaken the gels due to repulsive micelle–micelle interaction. In the meantime, analysis of the transition from linear to nonlinear deformation regimes suggests that the gels gradually become more fragile with surfactant concentrations due to electrostatic repulsion of the charged micelles. Such a surfactant concentration-dependent gel fragility was not observed in the presence of the neutral micelles. These results provide a great step further in our understanding of the phase behavior and rheology of complex CNC–surfactant mixtures and obtaining biocompatible hydrogels with tunable mechanical properties.

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Thermal stability and crystallization behavior of cellulose nanocrystals and their poly(l-lactide) nanocomposites: effects of surface ionic group and poly(d-lactide) grafting

Cited by 22 publications

References 47 publications

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Acetylation of lignin containing microfibrillated cellulose and its reinforcing effect for polylactic acid

Surfactant Driven Liquid to Soft Solid Transition of Cellulose Nanocrystal Suspensions

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