Optimization of mechanical properties of thermoplastic starch/clay nanocomposites

Majdzadeh‐Ardakani, Kazem; Navarchian, Amir H.; Sadeghi, F.

doi:10.1016/j.carbpol.2009.09.001

Cited by 192 publications

(142 citation statements)

References 27 publications

Supporting

Mentioning

124

Contrasting

Unclassified

Order By: Relevance

“…As it was stated, the mechanical properties are strongly influenced by the clay type, the glycerol and clay content, the clay's gallery spacing in the intercalated/exfoliated state into the nanocomposite, and the clay mixing mode [144,153,[166][167][168]. The Young's modulus increases linearly with the gallery spacing ( Fig.…”

Section: Comparison Between Some Mechanical Properties Of Different Cmentioning

confidence: 88%

Starch/Clay Nano-Biocomposites

Vázquez

Cyras

Álvarez

et al. 2012

Green Energy and Technology

View full text Add to dashboard Cite

The aim of this chapter is to describe the main studies and results on starch-based nanocomposites reinforced with clay particles. This particular combination leads to the formation of a nanocomposite material with novel properties. However, a good knowledge about starch (structure, type, chemical and physical modification) and its rheological behaviour is necessary for developing these nanocomposites. Many factors and processing parameters affect the final properties of the starch based nano-biocomposites. The main factors which influence the mechanical properties of the nano-biocomposites will be analyzed such as the type of clay, the chemical modification of clay, the type of plasticizer, the water humidity test conditions, the use of chemically modified starches, the thermal stability and water absorption. In addition, the influence of different processing techniques and mixing methods will be studied.

show abstract

Section: Comparison Between Some Mechanical Properties Of Different Cmentioning

confidence: 88%

Starch/Clay Nano-Biocomposites

Vázquez

Cyras

Álvarez

et al. 2012

Green Energy and Technology

View full text Add to dashboard Cite

show abstract

“…Changes on this wave number could be due to the formation of good hydrogen bonds between fibers and matrix [22]. It was observed that the bio-composites wave number for 60 min vibration are the largest shifting based on that of No UB specimen.…”

Section: Ftir Spectramentioning

confidence: 92%

“…As shown in figure, strain value without vibration was 16.91%, and it lowered into maximum value of 10.97% on 60 min duration of shaking (35.13% decreasing). According to last studies that TS and TM value of bio-composites without vibration were lower than vibrated one [8,22]. In these cases, vibration have changed mechanical properties of the biocomposites.…”

Section: Ultrasonics -Sonochemistry 40 (2018) 697-702mentioning

confidence: 97%

Effect of vibration duration of high ultrasound applied to bio-composite while gelatinized on its properties

Abral

Putra

Asrofi

et al. 2018

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

A B S T R A C TThis article reports effect of vibration duration of high ultrasound applied to bio-composite while gelatinized on its properties. The bio-composite consists of mixing of both the tapioca starch based bioplastic and oil palm empty fruit bunch (OPEFB) fibers with high volume fraction. Gelatinization of the bio-composite sample was poured into a rectangular glass mold placed then in an ultrasonic bath with 40 kHz, and 250 watt in different duration for 0, 15, 30, 60 min respectively. The results show that vibration during gelatinization has changed the characterisation of the bio-composite. SEM photograph displayed different fracture surface of tensile sample. For vibration duration of 60 min, tensile strength (TM), and tensile modulus (TM) was improved to 64.4, 277.4%, respectively, meanwhile strain was decreased to 35.1% in comparison without vibration. Fourier Transform Infrared Spectroscopy (FTIR), and XRD diffraction of the bio-composite has changed due to various vibration duration. Moisture absorption of the vibrated bio-composite was lower than that of the untreated one.

show abstract

“…A MMT-Na (Closite ® -Na) apresenta principal pico de difração em 2θ = 7,3 -7,96 o , 8,26,27 valores similares aos observados neste trabalho, com pico em 2θ = 7,1 o (Figura 3). Pode-se observar (Figura 3) que para todos os filmes produzidos com a nanoargila não houve a formação de picos característicos próximos de 2θ = 7,1 o e nem picos entre 2θ = 4 o e 2θ = 10 o , sugerindo que houve esfoliação total das lamelas da nanoargila na matriz polimérica.…”

Section: Difração De Raios-xunclassified

Propriedades físicas de filmes biodegradáveis à base de amido de mandioca, álcool polivinílico e montmorilonita

Faria¹,

Vercelheze²,

Mali³

2012

Quím. Nova

View full text Add to dashboard Cite

Recebido em 15/4/11; aceito em 5/9/11; publicado na web em 26/9/11 PHYSICAL PROPERTIES OF BIODEGRADABLE FILMS BASED ON CASSAVA STARCH, POLYVINYL ALCOHOL AND MONTMORILLONITE. The objective of this work was to manufacture biodegradable films based on cassava starch, polyvinyl alcohol (PVA) and sodium montmorillonite (Na-MMT), using glycerol as a plasticizer. These films were characterized according to their microstructure, optical, mechanical, and barrier properties. The combination of starch-PVA-MMT resulted in films with a more homogeneous surface than starch films. The introduction of PVA into the starch matrix led to the formation of films with lower water vapor permeability (WVP), higher tensile strength and greater elongation. MMT was exfoliated in the films, resulting in greater stability for different relative humidities, lower WVP, higher resistance and lower flexibility.Keywords: microstructure; mechanical properties; sodium montmorillonite. INTRODUÇÃOOs filmes biodegradáveis compõem parte importante do cenário de pesquisa nacional e internacional, com trabalhos importantes quanto à caracterização, formulação e aplicação destes materiais. Existem grandes possibilidades de utilização para os sistemas de embalagens biodegradáveis à base de amido, em especial na área de alimentos, devido ao seu baixo custo e abundância, no entanto, a produção de embalagens exclusivamente de amido não é viável devido à sua higroscopicidade e baixa flexibilidade, o que torna estes materiais sensíveis ao contato direto com a água e quebradiços.1 Com a finalidade de melhorar estas características, vários trabalhos têm sido propostos nos últimos anos 2-5 e, neste sentido, a incorporação de cargas minerais nanométricas 6-9 e a mistura de mais de outros polímeros biodegradáveis, como o álcool polivinílico (PVA), podem ser consideradas alternativas interessantes, pois além de manter a biodegradabilidade, atuam como reforço mecânico e podem diminuir a permeabilidade destes materiais ao vapor de água.O PVA é um polímero sintético, hidrofílico, biodegradável, não tóxico, biocompatível e que apresenta boa capacidade de formação de filmes. Devido sua alta compatibilidade com a matriz polimérica de amido e as suas características peculiares, tais como, propriedade de adesão, elevada resistência mecânica, barreira ao oxigênio, aromas, óleos e solventes, o PVA é o polímero sintético bastante promissor para a produção de embalagens biodegradáveis, deixando-as tão resistentes quanto as embalagens convencionais. [10][11][12][13] As nanoargilas, compostas predominantemente pelo argilomineral montmorilonita (55-70%), do grupo das esmectitas, são conhecidas pelo nome genérico de bentonitas. A montmorilonita (MMT) possui partículas com tamanhos que podem variar de 2-0,1 µm, podendo apresentar formato de placas ou lâminas. Pertence ao grupo dos filossilicatos, cujas placas são caracterizadas por unidades estruturais constituídas por uma folha de tetraedros de sílica, ligados pelos oxigênios localizados nos vértices da base, e uma folha de octaedro...

show abstract

Optimization of mechanical properties of thermoplastic starch/clay nanocomposites

Cited by 192 publications

References 27 publications

Starch/Clay Nano-Biocomposites

Starch/Clay Nano-Biocomposites

Effect of vibration duration of high ultrasound applied to bio-composite while gelatinized on its properties

Propriedades físicas de filmes biodegradáveis à base de amido de mandioca, álcool polivinílico e montmorilonita

Contact Info

Product

Resources

About