Chemical modification of cellulosic fibers for better convertibility in packaging applications

Vuoti, Sauli; Laatikainen, Elina; Heikkinen, Hanna; Johansson, Leena‐Sisko; Saharinen, Erkki; Retulainen, Elias

doi:10.1016/j.carbpol.2012.07.053

Cited by 49 publications

(22 citation statements)

References 25 publications

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“…The regular surface modification of cellulose fibers was broadened with the solvent exchange in the filler, from water, to ethanol either hexane. This approach was adapted from another research carried out by Vuoti et al [37] which considered paper-making applications.…”

Section: Cellulose Fibers Hybrid Chemical Modificationmentioning

confidence: 99%

Thermal Behavior of Green Cellulose-Filled Thermoplastic Elastomer Polymer Blends

Cichosz

2020

Molecules

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A recently developed cellulose hybrid chemical treatment consists of two steps: solvent exchange (with ethanol or hexane) and chemical grafting of maleic anhydride (MA) on the surface of fibers. It induces a significant decrease in cellulose moisture content and causes some changes in the thermal resistance of analyzed blend samples, as well as surface properties. The thermal characteristics of ethylene-norbornene copolymer (TOPAS) blends filled with hybrid chemically modified cellulose fibers (UFC100) have been widely described on the basis of differential scanning calorimetry and thermogravimetric analysis. Higher thermal stability is observed for the materials filled with the fibers which were dried before any of the treatments carried out. Dried cellulose filled samples start to degrade at approximately 330 °C while undried UFC100 specimens begin to degrade around 320 °C. Interestingly, the most elevated thermal resistance was detected for samples filled with cellulose altered only with solvents (both ethanol and hexane). In order to support the supposed thermal resistance trends of prepared blend materials, apparent activation energies assigned to cellulose degradation (EA1) and polymer matrix decomposition (EA2) have been calculated and presented in the article. It may be evidenced that apparent activation energies assigned to the first decomposition step are higher in case of the systems filled with UFC100 dried prior to the modification process. Moreover, the results have been enriched using surface free energy analysis of the polymer blends. The surface free energy polar part (Ep) raises considering samples filled with not dried UFC100. On the other hand, when cellulose fibers are dried prior to the modification process, then the blend sample’s dispersive part of surface free energy is increased with respect to that containing unmodified fiber. As polymer blend Ep exhibits higher values reflecting enhanced material degradation potential, the cellulose fibers employment leads to more eco-friendly production and responsible waste management. This is in accordance with the rules of sustainable development.

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Section: Cellulose Fibers Hybrid Chemical Modificationmentioning

confidence: 99%

Thermal Behavior of Green Cellulose-Filled Thermoplastic Elastomer Polymer Blends

Cichosz

2020

Molecules

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“…These derivatives are also hydrophobic and thermoplastic capable of forming free standing films from organic solvents [25]- [27]. The paper sheets prepared from the esterified cellulose fibers showed high hydrophobicity [28]. The barrier properties of xylan may be further improved through nanoclay reinforcement in aqueous medium.…”

Section: Xylanmentioning

confidence: 99%

Biopolymer Films and Coatings in Packaging Applications—A Review of Recent Developments

Vartiainen¹,

Vähä-Nissi²,

Harlin³

2014

MSA

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This review covers the recent developments in the field of biobased packaging materials. Special emphasis is placed on the barrier properties, which are crucial in terms of food packaging. The state-of-the-art of several biopolymers including pectin, starch, chitosan, xylan, galactoglucomannan, lignin and cellulose nanofibrils is discussed. As in most cases the packaging related properties of single layer biopolymer films are inadequate, the thin film coatings, such as sol-gel and ALD (atomic layer deposition), as well as the multilayer coatings are also briefly touched.

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“…In the search for novel bio-based materials as a replacement for non-renewable and non-biodegradable materials, cellulose, one of the main components of trees, is a potent candidate. Its advantages include good mechanical strength, high stiffness, low cost and good biodegradability (Wågberg and Annergren 1997;Bledzki and Gassan 1999;Kalia et al 2011;Qiu and Hu 2013;Vuoti et al 2013). However, cellulose is sensitive to moisture, limiting its application in environments with varying humidity, and it is nonthermoplastic and cannot therefore easily go through processes such as injection moulding, extrusion or pressing operations into complex-shaped structures, and this limits its use in applications with advanced material demands (Klemm et al 2011;Sehaqui et al 2011;Vishtal and Retulainen 2014).…”

Section: Introductionmentioning

confidence: 99%

On the relationship between fibre composition and material properties following periodate oxidation and borohydride reduction of lignocellulosic fibres

2016

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Periodate oxidation followed by borohydride reduction was performed on four structurally different pulp fibres to clarify the effect of chemical composition on the structural and mechanical properties of sheets made from these fibres. The main purpose was to explore the possibility of extending the use of lignocellulose fibres in novel applications. The degree of oxidation, morphological changes, chemical and physical structure of the fibres, the supramolecular ordering of the cellulose and the mechanical performance of handsheets made from the fibres were studied. The results showed that both periodate oxidation and borohydride reduction are more reactive towards the carbohydrates of the fibres and as a result, there is an improvement in the tensile properties of the sheets. If the carbohydrates of the fibres are only periodate oxidised to produce dialdehydes, inter-and intra-fibre crosslinks can be formed, leading to paper with increase strength and higher stiffness. The borohydride reduction results in fibres and papers with a greater strength and ductility. It was also found that the characteristic ductility of these modified papers, emanating from the dialcohol cellulose produced, is limited with lignin-rich fibres.

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Chemical modification of cellulosic fibers for better convertibility in packaging applications

Cited by 49 publications

References 25 publications

Thermal Behavior of Green Cellulose-Filled Thermoplastic Elastomer Polymer Blends

Thermal Behavior of Green Cellulose-Filled Thermoplastic Elastomer Polymer Blends

Biopolymer Films and Coatings in Packaging Applications—A Review of Recent Developments

On the relationship between fibre composition and material properties following periodate oxidation and borohydride reduction of lignocellulosic fibres

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