Melting Processing of Biodegradable Cellulose Diacetate/Starch Composites

Lee, S. Y.; Cho, M. S.; Nam, Jae Do; Lee, Y.

doi:10.1002/masy.200651019

Cited by 16 publications

(9 citation statements)

References 14 publications

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“…DS values were determined with 1 H NMR (hydrogen-1 nuclear magnetic resonance) and 13 C NMR (carbon nuclear magnetic resonance) methods. The 1 H NMR and 13 C NMR spectra of the cellulose fatty acid esters were acquired on an Agilent Technologies DD2 500 MHz spectrometer equipped with 5 mm broadband inverse ( 1 H) or broadband observe ( 13 C spectra) probes.…”

Section: Determination Of Degree Of Substitution (Ds)mentioning

confidence: 99%

“…When it comes to plasticizers, they are most often used for cellulose acetates due to the high glass transition temperature (Tg) and narrow melt processing, which can be managed with the help of given additives. I.e., it has been reported that cellulose diacetate with triacetin can lower the Tg to 50 °C [ 13 ]. However, cellulose octanoate (C8) and palmitate (C16) are melted and processable without any additions [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Tensile and Surface Wettability Properties of the Solvent Cast Cellulose Fatty Acid Ester Films

Kallakas,

Kattamanchi,

Kilumets

et al. 2023

Polymers

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Thermoplastic cellulose esters are promising materials for bioplastic packaging. For that usage, it is important to understand their mechanical and surface wettability properties. In this study, a series of cellulose esters are prepared, such as laurate, myristate, palmitate, and stearate. The aim of the study is to investigate the tensile and surface wettability properties of the synthesized cellulose fatty acid esters to understand their suitability as a bioplastic packaging material. Cellulose fatty acid esters are first synthesized from microcrystalline cellulose (MCC), then dissolved in pyridine solution, and after the solvent cast into thin films. The cellulose fatty acid ester acylation process is characterized by the FTIR method. Cellulose esters hydrophobicity is evaluated with contact angle measurements. The mechanical properties of the films are tested with the tensile test. For all the synthesized films, FTIR provides clear evidence of acylation by showing the presence of characteristic peaks. Films’ mechanical properties are comparable to those of generally used plastics such as LDPE and HDPE. Furthermore, it appears that with an increase in the side-chain length, the water barrier properties showed improvement. These results show that they could potentially be suitable materials for films and packaging materials.

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Section: Determination Of Degree Of Substitution (Ds)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tensile and Surface Wettability Properties of the Solvent Cast Cellulose Fatty Acid Ester Films

Kallakas,

Kattamanchi,

Kilumets

et al. 2023

Polymers

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“…Different researchers have carried out the biodegradation studies of NR composites reinforced with a number of fillers. [7][8][9][10][11][12][13][14][15][16][17][18][19] Therefore, it is thought worthwhile to investigate the biodegradation behaviour of PSP and CSP reinforced NR composites. Both NR and natural fillers are biodegradable, but the frigidity of NR for degradation within a reasonable time makes it unsuitable for developing environmentally benign materials.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation behaviour of natural rubber composites reinforced with natural resource fillers – monitoring by soil burial test

Sareena

Sreejith

Ramesan

et al. 2013

Journal of Reinforced Plastics and Composites

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Biodegradation studies of natural rubber composites reinforced with natural resource fillers like peanut shell powder and coconut shell powder of 10 and 40 parts per hundred part of rubber (phr) filler loadings were carried out under soil burial conditions for three/six months. The extent of biodegradation of natural rubber and natural rubber composites were evaluated through tensile strength and hardness measurements. It was observed that the durability of the composites was greatly dependent on chemical treatment, filler particle size and filler content. The stability of composites decreased with increase in filler content. Composites containing chemically treated fillers were found to be more resistant to soil erosion. But composites containing larger sized fillers were found to be less resistant to soil erosion. Surface morphology of the composites was determined using scanning electron microscopy to evaluate the degradation of the samples. The results indicate that the tensile strength and hardness were decreased after soil burial testing due to the possible biological attack by microbes onto the samples.

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“…Their employment research improved the processing of CDAbased materials but at the expense of their mechanical properties. On the basis of the examined literature and Triacetin (TA) and Diacetin (DA) were chosen to improve CDA processing in this study, because they are environmentally sustainable ("eco-friendly") plasticizers with low toxicity and fast biodegradability [10,11]. Plasticized CDA granules have been processed in a MiniLab II Haake Rheomex CTW 5 conical twin-screw extruder (Thermo Scientifi c Haake GmbH, Karlsruhe, Germany), at a screw rate of 80 rpm/min in a temperature range from 170°C to 210°C, depending on the material formulations ( Table 1).…”

Section: Introductionmentioning

confidence: 99%

Cellulose Acetate Blends - Effect of Plasticizers on Properties and Biodegradability

Phuong¹,

Verstiche²,

Cinelli³

et al. 2014

j renew mater

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Cellulose acetate (CDA) cannot be processed as raw material because it starts to decompose before melting. Triacetin and diacetin were tested to improve CDA processing versus conventional phthalate as environmentally sustainable plasticizers, because of their low toxicity and fast biodegradability. The addition of triacetin and diacetin allowed melt processing of CDA and the results of tensile tests outlined their effect as plasticizers. The values of mechanical properties were compatible with the requirements for applications in rigid packaging. From the results of biodegradation tests it can be concluded that for pure cellulose acetate, complete biodegradation was obtained within 200 days of testing after reinoculation. Incomplete biodegradation was observed for test items with 20% triacetin or with 30% phthalate. After 46 days of incubation, the test samples with 30% plasticizer based on triacetin or triacetin-diacetin were completely biodegraded. These formulations can be selected for the production of compostable blends and/or biocomposites.

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Melting Processing of Biodegradable Cellulose Diacetate/Starch Composites

Cited by 16 publications

References 14 publications

Tensile and Surface Wettability Properties of the Solvent Cast Cellulose Fatty Acid Ester Films

Tensile and Surface Wettability Properties of the Solvent Cast Cellulose Fatty Acid Ester Films

Biodegradation behaviour of natural rubber composites reinforced with natural resource fillers – monitoring by soil burial test

Cellulose Acetate Blends - Effect of Plasticizers on Properties and Biodegradability

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