Journal: Carbohydrate Polymers

Abbreviation

Carbohydr. Polym.

Publisher

Elsevier

Journal Volumes

ISSN

0144-8617
1879-1344

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Publications 1 - 10 of 39
  • Benchmarking supramolecular adhesive behavior of nanocelluloses, cellulose derivatives and proteins
    Item type: Journal Article
    Luotonen, Otso I.V.; Greca, Luiz G.; Nyström, Gustav; et al. (2022)
    Carbohydrate Polymers
    One of the key steps towards a broader implementation of renewable materials is the development of biodegradable adhesives that can be attained at scale and utilized safely. Recently, cellulose nanocrystals (CNCs) were demonstrated to have remarkable adhesive properties. Herein, we study three classes of naturally synthesized biopolymers as adhesives, namely nanocelluloses (CNFs), cellulose derivatives, and proteins by themselves and when used as additives with CNCs. Among the samples evaluated, the adhesion strength was the highest for bovine serum albumin and hydroxypropyl cellulose (beyond 10 MPa). These were followed by carboxymethylcellulose and CNCs (ca. 5 MPa) and mechanically fibrillated CNFs (ca. 2 MPa), and finally by tempo-oxidized CNFs (0.2 MPa) and lysozyme (1.5 MPa). Remarkably, we find that the anisotropy of adhesion (in plane vs out of plane) falls within a narrow range across the bio-based adhesives studied. Collectively, this study benchmarks bio-based non-covalent adhesives aiming towards their improvement and implementation.
  • Detecting variation in starch granule size and morphology by high-throughput microscopy and flow cytometry
    Item type: Journal Article
    Thieme, Mercedes; Hochmuth, Anton; Ilse, Theresa Elisabeth; et al. (2023)
    Carbohydrate Polymers
    Starch forms semi-crystalline, water-insoluble granules, the size and morphology of which vary according to biological origin. These traits, together with polymer composition and structure, determine the physicochemical properties of starch. However, screening methods to identify differences in starch granule size and shape are lacking. Here, we present two approaches for high-throughput starch granule extraction and size determination using flow cytometry and automated, high-throughput light microscopy. We evaluated the practicality of both methods using starch from different species and tissues and demonstrated their effectiveness by screening for induced variation in starch extracted from over 10,000 barley lines, yielding four with heritable changes in the ratio of large A-granules to small B-granules. Analysis of Arabidopsis lines altered in starch biosynthesis further demonstrates the applicability of these approaches. Identifying variation in starch granule size and shape will enable identification of trait-controlling genes for developing crops with desired properties, and could help optimise starch processing.
  • Oxidative and radical mediated cleavage of beta-glucan in thermal treatments
    Item type: Journal Article
    Kivela, R.; Sontag-Strohm, T.; Loponen, J.; et al. (2011)
    Carbohydrate Polymers
  • Structure-properties relationships of defined CNF single-networks crosslinked by telechelic PEGs
    Item type: Journal Article
    Cortes Ruiz, Maria F.; Garemark, Jonas; Ritter, Maximilian; et al. (2024)
    Carbohydrate Polymers
    The high structural anisotropy and colloidal stability of cellulose nanofibrils' enable the creation of self-standing fibrillar hydrogel networks at very low solid contents. Adding methacrylate moieties on the surface of TEMPO oxidized CNFs allows the formation of more robust covalently crosslinked networks by free radical polymerization of acrylic monomers, exploiting the mechanical properties of these networks more efficiently. This technique yields strong and elastic networks but with an undefined network structure. In this work, we use acrylate-capped telechelic polymers derived from the step-growth polymerization of PEG diacrylate and dithiothreitol to crosslink methacrylated TEMPO-oxidized cellulose nanofibrils (MATO CNF). This combination resulted in flexible and strong hydrogels, as observed through rheological studies, compression and tensile loading. The structure and mechanical properties of these hydrogel networks were found to depend on the dimensions of the CNFs and polymer crosslinkers. The structure of the networks and the role of individual components were evaluated with SAXS (Small-Angle X-ray Scattering) and photo-rheology. A thorough understanding of hybrid CNF/polymer networks and how to best exploit the capacity of these networks enable further advancement of cellulose-based materials for applications in packaging, soft robotics, and biomedical engineering.
  • The European Polysaccharide Network of Excellence (EPNOE) research roadmap 2040: Advanced strategies for exploiting the vast potential of polysaccharides as renewable bioresources
    Item type: Journal Article
    Gericke, Martin; Amaral, Adérito J.R.; Budtova, Tatiana; et al. (2024)
    Carbohydrate Polymers
    Polysaccharides are among the most abundant bioresources on earth and consequently need to play a pivotal role when addressing existential scientific challenges like climate change and the shift from fossil-based to sustainable biobased materials. The Research Roadmap 2040 of the European Polysaccharide Network of Excellence (EPNOE) provides an expert's view on how future research and development strategies need to evolve to fully exploit the vast potential of polysaccharides as renewable bioresources. It is addressed to academic researchers, companies, as well as policymakers and covers five strategic areas that are of great importance in the context of polysaccharide related research: (I) Materials & Engineering, (II) Food & Nutrition, (III) Biomedical Applications, (IV) Chemistry, Biology & Physics, and (V) Skills & Education. Each section summarizes the state of research, identifies challenges that are currently faced, project achievements and developments that are expected in the upcoming 20 years, and finally provides outlines on how future research activities need to evolve.
  • Effect of Polysaccharide Conformation on Ultrafiltration Separation Performance
    Item type: Journal Article
    Eder, Severin; Zueblin, Patrick; Diener, Michael; et al. (2021)
    Carbohydrate Polymers
    The manifold array of saccharide linkages leads to a great variety of polysaccharide architectures, comprising three conformations in aqueous solution: compact sphere, random coil, and rigid rod. This conformational variation limits the suitability of the commonly applied molecular weight cut-off (MWCO) as selection criteria for polysaccharide ultrafiltration membranes, as it is based on globular marker proteins with narrow Mw and hydrodynamic volume relation. Here we show the effect of conformation on ultrafiltration performance using randomly coiled pullulan and rigid rod-like scleroglucan as model polysaccharides for membrane rejection and molecular weight distribution. Ultrafiltration with a 10 kDa polyethersulfone membrane yielded significant different recoveries for pullulan and scleroglucan showing 1% and 71%, respectively. We found deviations greater than 77-fold between nominal MWCO and apparent Mw of pullulan and scleroglucan, while recovering over 90% polysaccharide with unchanged Mw. We anticipate our work as starting point towards an optimized membrane selection for polysaccharide applications.
  • Bile acid-retention by native and modified oat and barley β-glucan
    Item type: Journal Article
    Marasca, Elena; Boulos, Samy; Nyström, Laura (2020)
    Carbohydrate Polymers
  • Hydroxyl radical oxidation of feruloylated arabinoxylan
    Item type: Journal Article
    Bagdi, Attila; Tömösközi, Sándor R.; Nyström, Laura (2016)
    Carbohydrate Polymers
  • Hyaluronan composite bioink preserves nucleus pulposus cell phenotype in a stiffness-dependent manner
    Item type: Journal Article
    Miklošič, Gregor; De Oliveira, Stéphanie; Schlittler, Maja; et al. (2025)
    Carbohydrate Polymers
    Intervertebral disc degeneration is a major cause of neck and back pain, representing a significant global socioeconomic burden. The polysaccharide hyaluronan is key to maintaining disc physiology and mediating disc disease through its structural and biological roles in the nucleus pulposus, a component of the intervertebral disc highly susceptible to degeneration. In this study, we introduce a novel composite bioink designed for extrusion bioprinting of structures resembling the nucleus pulposus. Our bioink combines levels of hyaluronic acid and collagen that approach physiological concentrations and effectively mimics the disc's hydrated and mechanically resilient environment. We modulated the composite's mechanical properties through the tyramination of hyaluronic acid and subsequent photocrosslinking, influencing morphology and gene expression of embedded bovine nucleus pulposus cells. This allows us to replicate a range of properties from healthy to degenerated human nucleus pulposus, which would be challenging to achieve with traditional cell culture and in vivo models. Our results show that modulating hyaluronan physico-chemical properties influenced embedded cell phenotype. The outcomes of this study inform the future design of biomaterials for the modelling of disc disease and regeneration, and present a versatile platform that can be readily integrated with other biofabricated components to form engineered intervertebral disc-like structures.
  • Chemiluminescent wood
    Item type: Journal Article
    Ritter, Maximilian; Stricker, Laura; Burgert, Ingo; et al. (2024)
    Carbohydrate Polymers
    Wood materials incorporating new properties are of great interest, especially for advanced applications such as sustainable optics and photonics. In this work we describe a wood functionalization approach, comprising the incorporation of artificial chemiluminescent systems (phenyl oxalate ester‑hydrogen peroxide-fluorophore, and luminol-ferricyanide), resulting in light-emitting wood. By a detailed characterisation of the light emission features we point out the complex interaction between wood scaffold and chemiluminescent systems, especially the quenching effect of wood extractives (for the TCPO-H2O2-fluorophore system) and lignin (for the luminol-ferricyanide system). Moreover, we take advantage of the intrinsic anisotropic porosity and capillarity of wood tissue to study the chemiluminescent front propagation. Our results may inspire the development of novel light-emitting wood materials for a variety of applications, from fundamental studies of water uptake in wood to sensors and even design elements.
Publications 1 - 10 of 39