Structure and Mechanical Properties of Poly(lactic acid) Filled with (Starch nanocrystal)‐<i>graft</i>‐poly(<i>ε</i>‐caprolactone)

Yu, Jiahui; Ai, Fengwei; Dufresne, Alain; Gao, Shanjun; Huang, Jin; Chang, Peter R.

doi:10.1002/mame.200800134

Cited by 117 publications

(61 citation statements)

References 37 publications

(40 reference statements)

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“…However, the L/D ratio for SNs was far smaller than the former value [10], and the SNs looked like round particles and a decrease of elongation with the increase of SNA in the matrix was observed. Furthermore, higher SNA loading level resulted in a decrease of the elongation due to the self-aggregation of SNA, and similar results were reported by other authors [16,21,22,30]. The above results indicated that there might be an underlying structure whose formation controls the tensile performance evolution with SNA content.…”

Section: Tensile Testssupporting

confidence: 89%

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Huang

et al. 2015

Polymers

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Abstract:In the present paper, a series of totally novel bio-nanocomposite films from cellulose laurate (CL) and starch nanocrystals acetate (SNA) were fabricated, and the properties of nanocomposite films were investigated in detail. SNA was obtained by modifying starch nanocrystals (SNs) produced by sulfuric acid hydrolysis of corn starch with acetic anhydride. The favorable dispersity of SNA in chloroform made it ready to convert into nanocomposite films with CL via casting/evaporation method. The transmittance, thermal behavior, mechanical properties, barrier properties and hydrophobicity of CL/SNA nanocomposite films were investigated with UV-vis spectrophotometer, simultaneous thermal analyzer (STA), universal tensile tester/dynamic thermomechanical analysis (DMA), water vapor permeation meter/oxygen permeability tester, and contact angle tester, respectively. The transmittance of nanocomposite films decreased with the increase of SNA content. Thermogravimetric analysis (TGA) results showed that the introduction of SNA into CL matrix did not severely decrease the thermal behavior of CL/SNA nanocomposites. Moreover, non-linear and linear mechanical analysis reflected the enhancement of SNA. At lower contents of SNA (<5.0 wt%), the values of Young's modulus, tensile strength and the elongation at break of nanocomposite films were comparable with those of neat CL. However, with the increase of SNA, the Young's modulus and tensile strength were improved significantly and were accompanied by the decreased elongation at break. The water vapor OPEN ACCESSPolymers 2015, 7 1332 permeability (WVP) and oxygen permeability (PO 2 ) of CL/SNA nanocomposite films were significantly improved by the addition of SNA.

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Section: Tensile Testssupporting

confidence: 89%

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Huang

et al. 2015

Polymers

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“…Chitin whiskers were isolated and polycaprolactone grafted (CHW-g-PCL) in view of preparing thermoformable bionanocomposites [31][32][33][34] . The grafting was achieved by initiating the ring-opening polymerization ("grafting from" strategy) of caprolactone monomer onto the CHW surface under microwave radiation.…”

Section: Nanocompositesmentioning

confidence: 99%

Cellulose-reinforced composites: From micro-to nanoscale

Dufresne¹,

Belgacem²

2010

Polímeros

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This paper present the most relevant advances in the fields of: i) cellulose fibres surface modification; ii) cellulose fibres-based composite materials; and iii) nanocomposites based on cellulose whiskers or starch plateletlike nanoparticles. The real breakthroughs achieved in the first topic concern the use of solvent-free grafting process (plasma) and the grafting of the matrix at the surface of cellulose fibres through isocyanate-mediated grafting or thanks to "click chemistry". Concerning the second topic, it is worth to mention that for some cellulose/matrix combination and in the presence of adequate aids or specific surface treatment, high performance composite materials could be obtained. Finally, nanocomposites allow using the semi-crystalline nature and hierarchical structure of lignocellulosic fibres and starch granules to more deeply achieve this goal profitably exploited by Mother Nature

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“…The purified product was vacuum-dried, and coded as StN-g-PCL. In our previous report, 29 the grafted PCL content in StN-g-PCL was determined, by element analysis, to be 84.16 wt %. TEM images showed most of the StN-g-PCL nanoparticles were platelet-like in structure and less than 100 nm (Fig.…”

Section: Extraction and Grafting Of Starch Nanocrystalsmentioning

confidence: 99%

“…27,28 In this work, the surface of starch nanocrystals (StN) was functionalized by grafting polycaprolactone (PCL) chains based on the ''graft from'' strategy from our previous work. 29 The soft-segment, with the same origin as grafted PCL chains, was therefore selected as the component of waterborne polyurethane matrix. Compared with the previous report on the Poly(1,4-butylene glycol adipate)-based waterborne polyurethane modified by neat StN, 28 the same structure for soft-segment and grafted chains on the surface of StN could improve the association between waterborne polyurethane as matrix and the StN-g-PCL nano-filler.…”

Section: Introductionmentioning

confidence: 99%

Effects of starch nanocrystal‐graft‐polycaprolactone on mechanical properties of waterborne polyurethane‐based nanocomposites

Chang

Chen

et al. 2008

J of Applied Polymer Sci

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Based on a ''graft from'' strategy, the surface of starch nanocrystals (StN) were functionalized by grafting with polycaprolactone (PCL) chains via microwave assisted ring-opening polymerization (ROP). The modified natural nanoparticles were then compounded into a PCL-based waterborne polyurethane as matrix. The structural and mechanical properties of the WPU/StN-g-PCL nanocomposites were characterized by XRD, FTIR, SEM, DSC, DMA, and tensile testing. It was interesting to note that a loading-level of 5 wt % StN-g-PCL resulted in a simultaneous enhancement of tensile strength and elongation at break, both of which were higher than those of neat WPU. This enhancement was attributed to the uniform dispersion of StN-g-PCL because of its nano-scale size, the increased entanglements mediated with grafted PCL chains, and the reinforcing function of rigid StN. Increasing the StN-g-PCL content however caused the StN-g-PCL to self-aggregate as crystalline domains, which impeded improvement in tensile strength and elongation at break, but significantly enhanced Young's modulus.

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Structure and Mechanical Properties of Poly(lactic acid) Filled with (Starch nanocrystal)‐graft‐poly(ε‐caprolactone)

Cited by 117 publications

References 37 publications

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Cellulose-reinforced composites: From micro-to nanoscale

Effects of starch nanocrystal‐graft‐polycaprolactone on mechanical properties of waterborne polyurethane‐based nanocomposites

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