Montmorillonite–levan nanocomposites with improved thermal and mechanical properties

Chen, Xiaoming; Gao, Hongsheng; Ploehn, Harry J.

doi:10.1016/j.carbpol.2013.09.073

Cited by 63 publications

(29 citation statements)

References 48 publications

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“…But when the temperature increased from 200 to 250 • C a gradual decrease in the levan weight was observed (20-25%). From 250 to 700 • C, the levan continued to lose weight (further 25-35%) to 50% after that again a rapid stage of weight loss was observed up to 800 • C. This thermal profile suggests that as temperature increases to 200 to 250 • C levan's ␤(2 → 1) branch point linkages break first, followed by main chain ␤(2 → 6) linkages, pyranose rings, and other char-forming reactions after 700 • C. The similar thermal decomposition trend was reported for unhydrolyzed levan produced using Streptococcus salivarius and Bacillus species (Stivala, Kimura & Reich, 1981) (Chen, Gao & Ploehn, 2014;Dos-Santos et al, 2013).…”

Section: Identification and Structural Characterization Of Levansupporting

confidence: 69%

Antioxidant and anti-inflammatory levan produced from Acetobacter xylinum NCIM2526 and its statistical optimization

Ryali

Siddartha

Reddy

et al. 2015

Carbohydrate Polymers

122

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Section: Identification and Structural Characterization Of Levansupporting

confidence: 69%

Antioxidant and anti-inflammatory levan produced from Acetobacter xylinum NCIM2526 and its statistical optimization

Ryali

Siddartha

Reddy

et al. 2015

Carbohydrate Polymers

122

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“…With the aim to accomplish the requirements of the packaging sector, the use of clay minerals as fillers of polysaccharides and other biodegradable polymers is a common strategy followed to improve the mechanical and barrier properties of these matrices, as well as their solvent resistance . Although most of the work developed in this research topic has been focused on the use of layered silicates, other natural silicates with fibrous morphology like sepiolite and palygorskite have emerged in the last years as promising fillers in the development of bionanocomposite materials .…”

Section: Introductionmentioning

confidence: 99%

Bionanocomposites based on polysaccharides and fibrous clays for packaging applications

Alcántara

Darder

Aranda

et al. 2015

J of Applied Polymer Sci

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The present paper reports the use of sepiolite and palygorskite fibrous clays as fillers to improve the mechanical and barrier properties of films based on neutral or negatively charged polysaccharides, such as hydroxypropylmethylcellulose, carboxymethylcellulose, alginate, pectin, and xanthan. The interaction established between the polysaccharide chains and the clay fibers, as well as the physicochemical characteristics of the resulting bionanocomposites are characterized by several techniques. These materials are processed as self‐standing films that not only exhibit improved mechanical properties and water resistance, but also a significant barrier to UV light and reduced water absorption capacity, which make them very attractive for use in food packaging or coatings. Moreover, fibrous clays previously modified with the hydrophobic protein zein are also evaluated as fillers in alginate matrices, focusing on the improvement of water resistance, as well as of light and gas barrier properties, especially towards oxygen, which are of special interest for potential application in the food packaging sector. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42362.

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“…It has a high aspect ratio, excellent tensile strength and good thermal stability . Therefore, MMT has been widely used as an additive for polymers to improve their impact resistance, fatigue resistance, dimensional stability, thermal stability and gas barrier properties . For example, starch/MMT nanocomposites have been the subject of extensive research owing to their remarkably improved mechanical properties .…”

Section: Introductionmentioning

confidence: 99%

Starch‐MMT composite films: Effects of bio‐inspired modification on MMT

Zhou

2015

Starch Stärke

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Montmorillonite (MMT) was modified by bio-inspired polydopamine (PDA) to obtain an exfoliated structure. Then, the modified MMT (MMT-D) and the original MMT were incorporated into starch to fabricate individual composite films. MMT lamellae were mostly intercalated in starch, while those of MMT-D were more likely to be exfoliated and presented better dispersibility, as revealed by the surface morphologies and XRD patterns of the composite films. Although MMT provided greater thermal protection to starch, MMT-D improved the tensile properties of the composite films more effectively. The composite film containing 2% MMT-D displayed a tensile strength as high as 8.1 MPa and a Young's modulus as high as 416.4 MPa, which were 2.1 and 3.8 times the values of the pure starch film, respectively. However, the composite films containing MMT had reduced tensile strength and modulus. This study showed that PDA pre-modification of MMT could improve the performance of starch-based nanocomposites, thus accelerating their acceptance in food packaging applications.

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Montmorillonite–levan nanocomposites with improved thermal and mechanical properties

Cited by 63 publications

References 48 publications

Antioxidant and anti-inflammatory levan produced from Acetobacter xylinum NCIM2526 and its statistical optimization

Antioxidant and anti-inflammatory levan produced from Acetobacter xylinum NCIM2526 and its statistical optimization

Bionanocomposites based on polysaccharides and fibrous clays for packaging applications

Starch‐MMT composite films: Effects of bio‐inspired modification on MMT

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