Oxidized xylan additive for nanocellulose films – A swelling modifier

Palasingh, Chonnipa; Ström, Anna; Amer, Hassan; Nypelö, Tiina

doi:10.1016/j.ijbiomac.2021.03.062

Cited by 11 publications

(10 citation statements)

References 47 publications

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“…84 For oxidized hemicelluloses, the aggregation has been reported to be correlated to concentration and inversely correlated to the degree of modification. 29…”

Section: Solubility Of Extracted and Derivatized Hemicellulosesmentioning

confidence: 99%

“…There are multiple ways one can liberate hemicelluloses from wood biomass using hot water extraction of wood chips at neutral, acidic, and alkaline conditions, hot water, − neutral-, acidic-, and alkaline extraction of wood chips, delignified wood biomass, or wood pulp. , New methods are continuously being developed to improve the efficiency, sustainability, and selectivity of the extraction process. In fact, improving the efficiency while reducing the cost of the extraction and purification processes may be the key to facilitating the exploitation of wood hemicelluloses when it comes to their extraction at an industrial scale.…”

Section: Wood and Wood-like Hemicellulosesmentioning

confidence: 99%

“…As some native hemicelluloses are sparingly soluble in water, solvents such as aqueous alkaline solutions, DMSO, and cosolvent systems are used to dissolve or solubilize hemicelluloses. Additionally, chemical modification of hemicelluloses, for example, esterification, oxidation, and etherification, have been used to add functional groups, while modification of the backbone structure has also been employed to improve the hemicellulose–water interaction. , The degree of substitution was observed to play a key role in the solubilization of carboxymethylated GGM as the hydrodynamic volume increased as a function of degree of substitution . Carboxymethylation and dihydroxypropylation improved the water solubility of xylan, demonstrated by the reduced turbidity of the solutions as compared to unmodified xylans .…”

Section: Key Physicochemical Properties Of Wood Hemicelluloses and Th...mentioning

confidence: 99%

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Potential of Wood Hemicelluloses and Their Derivates as Food Ingredients

Abik

Palasingh

Bhattarai

et al. 2023

J. Agric. Food Chem.

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A holistic utilization of all lignocellulosic wood biomass, instead of the current approach of using only the cellulose fraction, is crucial for the efficient, ecological, and economical use of the forest resources. Use of wood constituents in the food and feed sector is a potential way of promoting the global economy. However, industrially established food products utilizing such components are still scarce, with the exception of cellulose derivatives. Hemicelluloses that include xylans and mannans are major constituents of wood. The wood hemicelluloses are structurally similar to hemicelluloses from crops, which are included in our diet, for example, as a part of dietary fibers. Hence, structurally similar wood hemicelluloses have the potential for similar uses. We review the current status and future potential of wood hemicelluloses as food ingredients. We include an inventory of the extraction routes of wood hemicelluloses, their physicochemical properties, and some of their gastrointestinal characteristics, and we also consider the regulatory route that research findings need to follow to be approved for food solutions, as well as the current status of the wood hemicellulose applications on that route.

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“…84 For oxidized hemicelluloses, the aggregation has been reported to be correlated to concentration and inversely correlated to the degree of modification. 29…”

Section: Solubility Of Extracted and Derivatized Hemicellulosesmentioning

confidence: 99%

Section: Wood and Wood-like Hemicellulosesmentioning

confidence: 99%

Section: Key Physicochemical Properties Of Wood Hemicelluloses and Th...mentioning

confidence: 99%

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Potential of Wood Hemicelluloses and Their Derivates as Food Ingredients

Abik

Palasingh

Bhattarai

et al. 2023

J. Agric. Food Chem.

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“…QCM-D has been utilized to determine thickness of cellulose thin films by calculating the mass of the film via Eq. 1 using the changes in frequency response before and after deposition of a cellulose layer on the QCM-D sensor (Peresin et al, 2012;Tammelin et al, 2015;Palasingh et al, 2021). This mass together with an input value of (assumed) density, ρ, is then used to extract film thickness (d) according to Eq.…”

Section: Quartz Crystal Microbalance With Dissipation Monitoringmentioning

confidence: 99%

Current Opportunities and Challenges in Biopolymer Thin Film Analysis—Determination of Film Thickness

2021

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Polymer thin films with thickness below 100 nm are a fascinating class of 2D materials with commercial and research applications in many branches ranging from coatings to photoresists and insulating materials, to mention just a few uses. Biopolymers have extended the scope of polymer thin films with unique materials such as cellulose, cellulose nanocrystals, cellulose nanofibrils with tunable water uptake, crystallinity and optical properties. The key information needed in thin biopolymer film use and research is film thickness. It is often challenging to determine precisely and hence several techniques and their combinations are used. Additional challenges with hydrophilic biopolymers such as cellulose are the presence of humidity and the soft and often heterogenous structure of the films. This minireview summarizes currently used methods and techniques for biopolymer thin film thickness analysis and outlines challenges for accurate and reproducible characterization. Cellulose is chosen as the representative biopolymer.

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“…Adsorption of the hemicelluloses, both modified and unmodified GGMs, on the CNF were analyzed using a quartz crystal microbalance with dissipation monitoring (QCM-D, Q-Sense AB Gothenburg, Sweden) at a temperature of 22 °C. The CNF substrates were prepared following a reported procedure (Palasingh et al, 2021). First SiO 2 -coated QCM-D sensors were cleaned by immersion in 10% NaOH solution for 20 s, rinsed with excess of water, and dried with nitrogen gas.…”

Section: Solution and Interfacial Characterizationmentioning

confidence: 99%

N2O–Assisted Siphon Foaming of Modified Galactoglucomannans With Cellulose Nanofibers

Nypelö¹,

Fredriksson²,

Arumughan³

et al. 2021

Front. Chem. Eng.

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Foaming of most bio-based polymers is challenged by low pore formation and foam stability. At the same time, the developing utilization of bio-based materials for the circular economy is placing new demands for easily processable, low-density materials from renewable raw materials. In this work, we investigate cellulose nanofiber (CNF) foams in which foaming is facilitated with wood-based hemicelluloses, galactoglucomannans (GGMs). Interfacial activity of the GGM is modulated via modification of the molecule’s amphiphilicity, where the surface tension is decreased from approximately 70 to 30 mN m−1 for unmodified and modified GGM, respectively. The chemical modification of GGMs by substitution with butyl glycidyl ether increased the molecule’s hydrophobicity and interaction with the nanocellulose component. The highest specific foam volume using 1 wt% CNF was achieved when modified GGM was added (3.1 ml g−1), compared to unmodified GGM with CNF (2.1 ml g−1). An amount of 96 and 98% of the GGM and GGM-BGE foams were lost after 15 min of foaming while the GGM and GGM-BGE with cellulose nanofibers lost only 33 and 28% of the foam respectively. In the case of GGM-BGE, the foam stability increased with increasing nanofiber concentration. This suggests that the altered hydrophobicity facilitated increased foam formation when the additive was incorporated in the CNF suspension and foamed with nitrous oxide (N2O). Thus, the hydrophobic character of the modified GGM was a necessity for foam formation and stability while the CNFs were needed for generating a self-standing foam structure.

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Oxidized xylan additive for nanocellulose films – A swelling modifier

Cited by 11 publications

References 47 publications

Potential of Wood Hemicelluloses and Their Derivates as Food Ingredients

Potential of Wood Hemicelluloses and Their Derivates as Food Ingredients

Current Opportunities and Challenges in Biopolymer Thin Film Analysis—Determination of Film Thickness

N2O–Assisted Siphon Foaming of Modified Galactoglucomannans With Cellulose Nanofibers

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