Simultaneous reinforcing and toughening: New nanocomposites of waterborne polyurethane filled with low loading level of starch nanocrystals

Chen, Guangjun; Wei, Ming; Chen, Jinghua; Huang, Jin; Dufresne, Alain; Chang, Peter R.

doi:10.1016/j.polymer.2008.02.020

Cited by 158 publications

(74 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

Section: Tensile Testssupporting

confidence: 89%

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

Huang

et al. 2015

Polymers

View full text Add to dashboard Cite

show abstract

“…As is well known, the hydrogen bond is an essential physical interaction in waterborne polyurethane affecting the microphase separation structure and mechanical properties of materials [35]. In this case, the -NH in the hard-segment was hydrogenbonded with the -C=O of the hard-segments, the ester -C=O of the PCL 2000 soft-segments and the -C=O on the ChW surface.…”

Section: Hydrogen Bonding In Nanocompositesmentioning

confidence: 96%

New waterborne polyurethane-based nanocomposites reinforced with low loading levels of chitin whisker

Huang¹,

Zou²,

Chang³

et al. 2011

Express Polym. Lett.

View full text Add to dashboard Cite

New waterborne polyurethane (WPU)-based nanocomposites were prepared by incorporating low loading levels of chitin whiskers (ChWs) as the nanophase. The resultant WPU/ChW nanocomposites exhibited prominent enhancement in both strength and Young's modulus, and maintained an elongation of greater than ca. 500%. The ChW loading level of 3 wt% showed the maximum tensile strength (28.8 MPa) and enhanced Young's modulus (6.5 MPa), ca.1.8- and 2.2-fold over those of neat WPU. The active surface and rigidity of ChW facilitated formation of the interface for stress transferring and contributed to higher stress-endurance. As the ChW loading level increased, self-aggregation of ChWs resulted in a decrease in strength; however, the rigidity of ChW still supported the increase in Young's modulus, and the nanocompositescontaining 5 wt% ChWs had the highest Young's modulus (9.6 MPa). This work enriches the research into achieving high mechanical performance of waterborne polyurethane-based nanocomposites by introducing a natural nanofiller, and this high performance 'green' bionanocomposites will likely have promising prospects

show abstract

“…New nanocomposites of waterborne polyurethane (WPU) as a matrix were prepared by filling low loading of starch nanocrystals (StNs) as a nano-phase [35] . The resulting materials possessed enhanced strength, elongation and Young's modulus.…”

Section: Nanocompositesmentioning

confidence: 99%

Cellulose-reinforced composites: From micro-to nanoscale

Dufresne¹,

Belgacem²

2010

Polímeros

Self Cite

View full text Add to dashboard Cite

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

show abstract

Simultaneous reinforcing and toughening: New nanocomposites of waterborne polyurethane filled with low loading level of starch nanocrystals

Cited by 158 publications

References 45 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

New waterborne polyurethane-based nanocomposites reinforced with low loading levels of chitin whisker

Cellulose-reinforced composites: From micro-to nanoscale

Contact Info

Product

Resources

About