Influence of cellulose nanocrystal on strength and properties of low density polyethylene and thermoplastic starch composites

Starch-corncob cellulose-cassia oil (SCC) composite films are fabricated by a solution casting technique, using corn starch as substrate, corncob cellulose fibers as the reinforcing material, and cassia oil added as the bacteriostatic agent. The morphology, transmittance, thermal properties, permeability, and mechanical properties of the SCC composite films are studied. The SCC composite film with 2% w/w corncob cellulose and 0.2% v/w cassia oil show good properties. The surface of the SCC composite film is smooth, and the components are evenly mixed as shown by scanning electron microscopy images. Fourier transform infrared spectroscopic analysis also show that both cassia oil and corncob cellulose molecules successfully enter the starch matrix, and a stable starch-corncob cellulose cassia oil composite film is formed. Thermogravimetric analysis of the SCC composite film shows that the film has good thermal stability and good heat resistance. In the SCC composite film with 2% w/w corncob cellulose, tensile strength decreases the content of cassia oil increases, but elongation at break shows the trend of increasing initially and then decreasing. The SCC composite films have good mechanical properties and can keep fruit fresh, indicating that the composite film can be used as a good food packing material.

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“…Therefore, adding cassia oil in an appropriate amount could endow the composite film with better transparency. [ 18 ]…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Corn Starch‐Based Composite Films Containing Corncob Cellulose and Cassia Oil

Chen

Yuan

2020

Starch Stärke

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“…Enhanced water vapor barrier property with the addition of 1% cellulose nanocrystals in the polymer matrix Gray et al (2018) Cellulose nanocrystals/polyvinyl alcohol…”

Section: Food Packaging Applicationsmentioning

confidence: 99%

Renewable cellulosic nanocomposites for food packaging to avoid fossil fuel plastic pollution: a review

et al. 2020

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The extensive use of petroleum-based synthetic and non-biodegradable materials for packaging applications has caused severe environmental damage. The rising demand for sustainable packaging materials has encouraged scientists to explore abundant unconventional materials. For instance, cellulose, extracted from lignocellulosic biomass, has gained attention owing to its ecological and biodegradable nature. This article reviews the extraction of cellulose nanoparticles from conventional and non-conventional lignocellulosic biomass, and the preparation of cellulosic nanocomposites for food packaging. Cellulosic nanocomposites exhibit exceptional mechanical, biodegradation, optical and barrier properties, which are attributed to the nanoscale structure and the high specific surface area, of 533 m2 g−1, of cellulose. The mechanical properties of composites improve with the content of cellulose nanoparticles, yet an excessive amount induces agglomeration and, in turn, poor mechanical properties. Addition of cellulose nanoparticles increases tensile properties by about 42%. Barrier properties of the composites are reinforced by cellulose nanoparticles; for instance, the water vapor permeability decreased by 28% in the presence of 5 wt% cellulose nanoparticles. Moreover, 1 wt% addition of filler decreased the oxygen transmission rate by 21%. We also discuss the eco-design process, designing principles and challenges.

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“…Coal and oil were unrenewable resources and materials based of them were difficult to be degraded. Natural resources were biodegradable and being considered as a main source to replace coal and oil 1–3 . Cellulose with an annual production of 1.5 trillion tons 4 was the most abundant natural resources in the world 5 .…”

Section: Introductionmentioning

confidence: 99%

On the use of cellulose nanowhisker as reinforcement in all‐cellulose composite membrane from corn stalk

Tian

Sun

2020

J of Applied Polymer Sci

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All‐cellulose composite (ACC) membranes were prepared with cellulose and cellulose nano whisker (CNW) extracted from corn stalk by using NaOH/thiourea as solvent. CNW was isolated via acid hydrolysis method and the yield, size distribution and morphology of CNW were investigated. ACC Membranes were characterized via SEM, XRD, TGA as well as water flux and were further plasticized with glycerol aqueous solution. The mechanical property and transparency of ACC membranes before and after plasticization were compared. CNW prepared with 63% sulfuric acid for 60 min of hydrolysis time had the biggest ratio of length to diameter and moderate yield. ACC membrane with 5% CNW content had the highest tensile strength and the structure of ACC membranes was observed clearly in SEM images. TGA testing indicated that the initial degradation temperature tended to lower after CNW was introduced into membrane. ACC membrane had good optical transmittance and good flexibility after plasticization.

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Influence of cellulose nanocrystal on strength and properties of low density polyethylene and thermoplastic starch composites

Cited by 60 publications

References 56 publications

Preparation and Characterization of Corn Starch‐Based Composite Films Containing Corncob Cellulose and Cassia Oil

Preparation and Characterization of Corn Starch‐Based Composite Films Containing Corncob Cellulose and Cassia Oil

Renewable cellulosic nanocomposites for food packaging to avoid fossil fuel plastic pollution: a review

On the use of cellulose nanowhisker as reinforcement in all‐cellulose composite membrane from corn stalk

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