Addition of wheat straw nanofibrils to improve the mechanical and barrier properties of cassava starch–based bionanocomposites

Lago, Rafael Carvalho do; Oliveira, Ana Lázara Matos de; Santos, Allan de Amorim dos; Zitha, Elídio Zaidine Maurício; Carvalho, Elisângela Elena Nunes; Tonoli, Gustavo Henrique Denzin; Boas, Eduardo Valério de Barros Vilas

doi:10.1016/j.indcrop.2021.113816

Cited by 26 publications

(18 citation statements)

References 74 publications

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“…Addition of starch decreased all determinations of tensile stress, strain at break and Young’s modulus for the PLLA films. This was due to the poor mechanical properties of starch and poor phase compatibility between hydrophobic PLLA and hydrophilic starch [ 15 , 20 ]. The 80/20 PLLA/starch film in this work was very brittle.…”

Section: Resultsmentioning

confidence: 99%

“…The water contact angles of the composite films decreased steadily (hydrophilicity increased) as the starch content increased. This was due to the high hydrophilicity of starch phases [ 15 , 20 ].…”

Section: Resultsmentioning

confidence: 99%

“…Native starches are low-cost and non-scarce biopolymers and have been blended with various biodegradable plastics, such as PLLA [ 15 , 16 , 17 ], poly(ε-caprolactone) [ 18 ] and polyhydroxybutyrate [ 19 ], for reducing their production costs and for maintaining their biodegradability. However, the highly brittle PLLA/native starch composites are limited in practical applications due to the poor mechanical properties of native starch and poor phase compatibility between PLLA and native starch particles [ 15 , 20 ]. Therefore, the aim of this work is to investigate the influence of native cassava starch (5, 10 and 20 wt%) on the thermal stability, phase morphology, mechanical properties and hydrophilicity of PLLA-PEG-PLLA compared to PLLA/native cassava starch blends.…”

Section: Introductionmentioning

confidence: 99%

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Improvement in Thermal Stability of Flexible Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) Bioplastic by Blending with Native Cassava Starch

Srisuwan

Baimark

2022

Polymers

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High-molecular-weight poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) triblock copolymer (PLLA-PEG-PLLA) is a promising candidate for use as a biodegradable bioplastic because of its high flexibility. However, the applications of PLLA-PEG-PLLA have been limited due to its high cost and poor thermal stability compared to PLLA. In this work, native cassava starch was blended to reduce the production cost and to improve the thermal stability of PLLA-PEG-PLLA. The starch interacted with PEG middle blocks to increase the thermal stability of the PLLA-PEG-PLLA matrix and to enhance phase adhesion between the PLLA-PEG-PLLA matrix and dispersed starch particles. Tensile stress and strain at break of PLLA-PEG-PLLA films decreased and the hydrophilicity increased as the starch content increased. However, all the PLLA-PEG-PLLA/starch films remained more flexible than the pure PLLA film, representing a promising candidate in biomedical, packaging and agricultural applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement in Thermal Stability of Flexible Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) Bioplastic by Blending with Native Cassava Starch

Srisuwan

Baimark

2022

Polymers

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“…NC from non-wood lignocellulosic biomass could be used as a reinforcement filler to overcome the limitation of starch and improve mechanical and thermal properties. NC (50 wt% loading) from wheat straw with starch showed higher Young's modulus values of 586 MPa, which represent good stiffness, but elongation and puncture decrease with the addition of NC (do Lago et al 2021). Again, rice straw NC (15% loading) and starch-based nanocomposite resulted in 4.4 and 1.61 times increases in Young's modulus and yield strength, respectively.…”

Section: Starch-nc Nanocompositesmentioning

confidence: 95%

Rice straw as a source of nanocellulose for sustainable food packaging materials: A Review

Islam

Saini

Das

et al. 2022

BioRes

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Asian countries, despite being the largest producers and yielding a significant proportion of the world’s rice, have poor disposal facilities for the harvested rice straw (stubble). Due to higher costs in their handling relative to their value, local farmers prefer the burning of stubble fields, thus creating environmental problems. Even though the government has taken initiatives, no effective solution has been discovered to handle this large agro-waste problem efficiently. In this regard, the utilization of rice straw to develop nanocellulose (NC) products is of interest. Renewability and biodegradability, along with suitable mechanical and thermal properties required for the packaging functions, are key advantages of NC. The bio-nanocomposites prepared using NC and other bio-based polymers are also being widely considered for sustainable food packaging applications due to the reinforcement provided by NC and alternative petroleum-based packaging materials. This review provides an overview of process utilization for preparing NC products using rice straw, pulping methods, and isolation to produce bio-nanocomposites for sustainable food packaging applications. The challenges and future aspects covering the utilization of rice straw for producing NC and eventually producing active packaging materials are also discussed.

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“…All the spectra were normalized by taking C-O at 1055 cm −1 as the reference peak. Both LCNFs and CNFs exhibited similar peaks including 3330 cm −1 (intermolecular O-H band), 2900 cm −1 (-CH 2 -stretching vibration), 1632 cm −1 (oxygen-containing group of C-O and O-H), 1435 cm −1 (-CH 2 -bending vibration), 1390 cm −1 (-CH-vibration) and 1055 cm −1 (stretching vibration of C-O)(Chen et al 2018;do Lago et al 2021). However, the LCNF coating layer exhibited a peak at 1610 cm −1 which is absent in the CNF coating layer due to the stretching vibration of the C=C bond present in the phenyl group of lignin(Chen et al 2018).…”

mentioning

confidence: 98%

Recyclable Grease-Proof Cellulose Nanocomposites with Enhanced Water Resistance for Food Serving Applications

Hossain

Tajvidi

Bousfield

et al. 2022

Preprint

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Recyclable cellulose nanofibril (CNF) and lignin-containing cellulose nanofibril (LCNF) coated wood flour composites were fabricated using a vacuum-filtration process for food serving applications. The coated cellulose nanofibril composites had excellent mechanical, and oil, and grease barrier properties compared to a commercial container. However, the composites with both LCNF and CNF coating layers had poor performance in wet conditions compared to the commercial container. The addition of 1 wt.% aluminum sulfate (alum) to the CNF and LCNF coating layer significantly improved the water-resistance of the composites. CNF +1% alum coated composites had inferior water resistance and lower mechanical strength in wet conditions compared to the commercial container. However, the LCNF +1% alum coated composites had comparable water resistance and higher wet mechanical properties than the commercial container. The recyclability of the composites was assessed through the disintegration of the samples in water and subsequent reformation, and it was found that the composites were fully recyclable. The composites could fully retain their mechanical and excellent oil and grease barrier properties after each recycling level. These recyclable fully bio-based nanocomposites can be an eco-friendly alternative for currently used food container systems that use harmful chemicals.

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Addition of wheat straw nanofibrils to improve the mechanical and barrier properties of cassava starch–based bionanocomposites

Cited by 26 publications

References 74 publications

Improvement in Thermal Stability of Flexible Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) Bioplastic by Blending with Native Cassava Starch

Improvement in Thermal Stability of Flexible Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) Bioplastic by Blending with Native Cassava Starch

Rice straw as a source of nanocellulose for sustainable food packaging materials: A Review

Recyclable Grease-Proof Cellulose Nanocomposites with Enhanced Water Resistance for Food Serving Applications

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