Glucomannan composite films with cellulose nanowhiskers

Mikkonen, Kirsi S.; Mathew, Aji P.; Pirkkalainen, Kari; Serimaa, Ritva; Xu, Chunlin; Willför, Stefan; Oksman, Kristiina; Tenkanen, Maija

doi:10.1007/s10570-009-9380-3

Cited by 55 publications

(33 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although differences depending on plasticizer type were observed, the values were rather low, which is typical for polymers with relatively low degree of polymerization. In previous studies, where GGM was plasticized with glycerol or sorbitol alone, films had similar tensile strengths (12 MPa), but sorbitol-plasticized film had higher elongation at break (7%) and lower Young's modulus (250 MPa) than glycerolplasticized film (3 to 4% and 500 to 750 MPa, respectively) (Mikkonen et al 2010;. Differences in tensile properties of glycerol-and sorbitol-plasticized GGM films between the current and previous studies may be due to a different GGM batch being used by Mikkonen et al (2010) and to film solution preparation that used a high-pressure homogenizer ).…”

Section: Osax and Ggm Films (1 Week)mentioning

confidence: 89%

“…Film formation from agro-based xylans, such as those from cotton stalks, barley husks, oat spelt, corn hulls, and wheat bran, has been studied lately (Zhang and Whistler 2004;Höije et al 2005;Mikkonen et al 2009;Zhang et al 2011;Bahcegul et al 2012). GGM film formation has been studied with plasticizers, with reinforcement using nano-sized cellulose, and with cross-linking agents (Hartman et al 2006, Mikkonen et al 2010. However, stability studies of hemicellulose films have only been briefly addressed in our previous study on OsAX films ), which opened questions on, e.g., the function of plasticizer blends relative to the behavior of barrier properties and the crystallinity of films during storage.…”

Section: Introductionmentioning

confidence: 99%

“…Films made from hemicelluloses with low substitution degrees, such as OsAX, aspen glucuronoxylan, and GGM, are semi crystalline (Gröndahl et al 2004;Mikkonen et al 2009;Mikkonen et al 2010). Morphological changes in films, like changes in crystallinity, may occur during storage.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long-Term Physical Stability of Plasticized Hemicellulose Films

Heikkinen¹,

Mikkonen²,

Koivisto³

et al. 2013

BioResources

Self Cite

View full text Add to dashboard Cite

aOat spelt arabinoxylan (OsAX) and spruce galactoglucomannan (GGM) are hemicelluloses that can be extracted in large quantities from sidestreams of the agriculture and forest industries. They both form selfstanding films, making them potential future packaging materials. This systematic study focuses on the effect of long-term storage on the physical stability of hemicellulose-based films. OsAX and GGM films were plasticized with 40% (w/w of the polysaccharide) of glycerol, sorbitol, or their blends, and their stability was followed for four months. Ageing especially affected the glycerol-containing films, in which the tensile strength and Young's modulus increased and elongation at break decreased. Although the mechanical properties were altered, storage did not affect crystallinity of the films. Oxygen gas permeability (OP) and water vapor permeability (WVP) properties were monitored in OsAX films. Interestingly WVP decreased during storage; more than a 40% decrease was seen when plasticizer blends contained 50% or more glycerol. In contrast, there were no drastic changes in the OP during storage; all the OPs obtained were between 3.7 and 8.9 [cm 3 µm/ (m 2 d kPa)].

show abstract

Section: Osax and Ggm Films (1 Week)mentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Long-Term Physical Stability of Plasticized Hemicellulose Films

Heikkinen¹,

Mikkonen²,

Koivisto³

et al. 2013

BioResources

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nanocrystalline cellulose is greater than 60% crystalline [21][22] and this property together with the resulting rigid hydrogen-bonded network of nanocrystallinecellulose can cause an increase in tortuousity and smaller pore size for nanocomposites which may be utilized to create high barrier materials. In a recent study, spruce galactoglucomannans (GGM) and konjac glucomannan (KGM) were mixed with nanocrystalline cellulose (NCC) to study the mechanical and barrier properties of the films [23,24].…”

mentioning

confidence: 99%

High Oxygen Nanocomposite Barrier Films Based on Xylan and Nanocrystalline Cellulose

et al. 2010

View full text Add to dashboard Cite

The goal of this work is to produce nanocomposite film with low oxygen permeability by casting an aqueous solution containing xylan, sorbitol and nanocrystalline cellulose. The morphology of the resulting nanocomposite films was examined by scanning electron microscopy and atomic force microscopy which showed that control films containing xylan and sorbitol had a more open structure as compared to xylan-sorbitol films containing sulfonated nanocrystalline cellulose. The average pore diameter, bulk density, porosity and tortuosity factor measurements of control xylan films and nanocomposite xylan films were examined by mercury intrusion porosimetry techniques. Xylan films reinforced with nanocrystalline cellulose were denser and exhibited higher tortuosity factor than the control xylan films. Control xylan films had average pore diameter, bulk density, porosity and tortuosity factor of 0.1730 μm, 0.6165 g/ml , 53.0161% and 1.258, respectively as compared to xylan films reinforced with 50% nanocrystalline cellulose with average pore diameter of 0.0581 μm, bulk density of 1.1513 g/ml, porosity of 22.8906% and tortuosity factor of 2.005. Oxygen transmission rate tests demonstrated that films prepared with xylan, sorbitol and 5%, 10%, 25% and 50% sulfonated nanocrystalline cellulose exhibited a significantly reduced oxygen permeability of and either alginate or carboxymethylcellulose were also studied.The reported values of oxygen permeability of GGM/alginate/

show abstract

“…[44][45][46] Accordingly, we believe that the higher relative amount of crystalline material in the nanocomposites results in less penetration of water molecules into the film. This would then result in lower water transmission rate and may in part explain the observed improved barrier properties of the nanocomposite film.…”

Section: Nmr T 2 Relaxation Experiments On Xylanmentioning

confidence: 98%

Biopolymer Nanocomposite Films Reinforced with Nanocellulose Whiskers

Saxena¹,

Foston²,

Kassaee³

et al. 2012

J. Nanosci. Nanotech.

View full text Add to dashboard Cite

A xylan nanocomposite film with improved strength and barrier properties was prepared by a solution casting using nanocellulose whiskers as a reinforcing agent. The 13 C cross-polarization magic angle spinning (CP/MAS) nuclear magnetic resonance (NMR) analysis of the spectral data obtained for the NCW/xylan nanocomposite films indicated the signal intensity originating from xylan-cellulose interactions. Qualitatively, the spectral data obtained for the NCW/xylan nanocomposite films indicated that the amount of xylan adsorbed to cellulose increases with the addition of NCW. In an attempt to quantify this effect, non-linear least-squared spectral line fitting was used to deconvolute the adsorbed xylan peak at ∼82 ppm. The peak intensity ratio of adsorbed xylan peak and xylan C 1 peak, which represents the total amount of xylan increases suggesting that upon the addition of NCW, the amount of adsorbed xylan increases. In an effort to further infer the structure-property relationships associated with the observed strength and barrier properties, 1 H NMR T 2 relaxation experiments were also conducted to investigate the change in the nature of carbohydrate-water interactions as a result of NCW incorporation. Water adsorbed into the 50% nanocomposite film had significantly shorter relaxation times with respect to the control xylan/sorbitol and all other NCW/xylan nanocomposite films. Additionally, X-ray diffraction of the nanocomposite films showed increased levels of crystalline material in the nanocomposites due to NCW addition.

show abstract

Glucomannan composite films with cellulose nanowhiskers

Cited by 55 publications

References 27 publications

Long-Term Physical Stability of Plasticized Hemicellulose Films

Long-Term Physical Stability of Plasticized Hemicellulose Films

High Oxygen Nanocomposite Barrier Films Based on Xylan and Nanocrystalline Cellulose

Biopolymer Nanocomposite Films Reinforced with Nanocellulose Whiskers

Contact Info

Product

Resources

About