A morphological interpretation of water chemical exchange and mobility in cellulose materials derived from proton NMR T2 relaxation

Ibbett, Roger; Wortmann, Franz; Varga, Ksenija; Schuster, K. Christian

doi:10.1007/s10570-013-0106-1

Cited by 16 publications

(18 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak at 2477 ms was due to the bulk water, whereas the other two peaks were assigned to water molecules in the system with different constraint levels. Water in hydrated cellulose includes non-interacting water, interacting water, and proton exchangeable water (Ibbett, Wortmann, Varga & Schuster, 2014). The bound water has very short relaxation time, less than 10 ms, and water trapped by capillary forces in the lumen contributed to a peak at 110 ms (Felby, Thygesen,…”

Section: Cellulose Fibrillation and Process Timementioning

confidence: 99%

Cellulose fibrillation and interaction with psyllium seed husk heteroxylan

2020

View full text Add to dashboard Cite

Highlights: Flocculates of fibrillated cellulose is promoted by heating and centrifugation  Unheated mixtures can be described as binary phase dispersions  Heated mixtures form interpenetrating composites with psyllium husk heteroxylan  Psyllium husk heteroxylans weakly associate with (fibrillated) cellulose  Increased fibrillation leads to a denser or clumped structure of the mixtures

show abstract

Section: Cellulose Fibrillation and Process Timementioning

confidence: 99%

Cellulose fibrillation and interaction with psyllium seed husk heteroxylan

2020

View full text Add to dashboard Cite

show abstract

“…Recently, the application of NMR has been expanded to probe lignocellulosic polysaccharide compositions, crystallinity index of cellulose, porosity, and lignin characterization (Foston & Ragauskas, 2010; Haddad et al, 2017; Ibbett et al, 2014; Jeoh et al, 2017; Karuna et al, 2014; Kiemle et al, 2003; Park et al, 2009; Pu et al, 2011; Wu et al, 2017). NMR spectroscopy is also routinely used for quantitative and qualitative analyses of fatty compounds in either pure chemicals or oilseeds (Berman et al, 2013; Knothe & Kenar, 2004; Miyake et al, 1998; Sacco et al, 2000; Zverev et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Development and validation of time‐domain ¹H‐NMR relaxometry correlation for high‐throughput phenotyping method for lipid contents of lignocellulosic feedstocks

2021

View full text Add to dashboard Cite

The bioenergy crops such as energycane, miscanthus, and sorghum are being genetically modified using state of the art synthetic biotechnology techniques to accumulate energy‐rich molecules such as triacylglycerides (TAGs) in their vegetative cells to enhance their utility for biofuel production. During the initial genetic developmental phase, many hundreds of transgenic phenotypes are produced. The efficiency of the production pipeline requires early and minimally destructive determination of oil content in individuals. Current screening methods require time‐intensive sample preparation and extraction with chemical solvents for each plant tissue. A rapid screen will also be needed for developing industrial extraction as these crops become available. In the present study, we have devised a proton relaxation nuclear magnetic resonance (1H‐NMR) method for single‐step, non‐invasive, and chemical‐free characterization of in‐situ lipids in untreated and pretreated lignocellulosic biomass. The systematic evaluation of NMR relaxation time distribution provided insight into the proton environment associated with the lipids in the biomass. It resolved two distinct lipid‐associated subpopulations of proton nuclei that characterize total in‐situ lipids into bound and free oil based on their “molecular tumbling” rate. The T1T2 correlation spectra also facilitated the resolution of the influence of various pretreatment procedures on the chemical composition of molecular and local 1H population in each sample. Furthermore, we show that hydrothermally pretreated biomass is suitable for direct NMR analysis unlike dilute acid and alkaline pretreated biomass which needs an additional step for neutralization.

show abstract

“…Pristine cellulose beads were then fabricated with surface areas over 300 m 2 /g [16]. The mercerization changes the cellulosic structure, leading to the formation of cellulose II [17], a cellulose polymorph with different water interactions [18].…”

Section: Introductionmentioning

confidence: 99%

Topochemical Engineering of Cellulose—Carboxymethyl Cellulose Beads: A Low-Field NMR Relaxometry Study

Wever

Oliveira‐Silva²,

Marreiros³

et al. 2020

Molecules

View full text Add to dashboard Cite

The demand for more ecological, highly engineered hydrogel beads is driven by a multitude of applications such as enzyme immobilization, tissue engineering and superabsorbent materials. Despite great interest in hydrogel fabrication and utilization, the interaction of hydrogels with water is not fully understood. In this work, NMR relaxometry experiments were performed to study bead–water interactions, by probing the changes in bead morphology and surface energy resulting from the incorporation of carboxymethyl cellulose (CMC) into a cellulose matrix. The results show that CMC improves the swelling capacity of the beads, from 1.99 to 17.49, for pure cellulose beads and beads prepared with 30% CMC, respectively. Changes in water mobility and interaction energy were evaluated by NMR relaxometry. Our findings indicate a 2-fold effect arising from the CMC incorporation: bead/water interactions were enhanced by the addition of CMC, with minor additions having a greater effect on the surface energy parameter. At the same time, bead swelling was recorded, leading to a reduction in surface-bound water, enhancing water mobility inside the hydrogels. These findings suggest that topochemical engineering by adjusting the carboxymethyl cellulose content allows the tuning of water mobility and porosity in hybrid beads and potentially opens up new areas of application for this biomaterial.

show abstract

A morphological interpretation of water chemical exchange and mobility in cellulose materials derived from proton NMR T2 relaxation

Cited by 16 publications

References 36 publications

Cellulose fibrillation and interaction with psyllium seed husk heteroxylan

Cellulose fibrillation and interaction with psyllium seed husk heteroxylan

Development and validation of time‐domain ¹H‐NMR relaxometry correlation for high‐throughput phenotyping method for lipid contents of lignocellulosic feedstocks

Topochemical Engineering of Cellulose—Carboxymethyl Cellulose Beads: A Low-Field NMR Relaxometry Study

Contact Info

Product

Resources

About

A morphological interpretation of water chemical exchange and mobility in cellulose materials derived from proton NMR T2 relaxation

Cited by 16 publications

References 36 publications

Cellulose fibrillation and interaction with psyllium seed husk heteroxylan

Cellulose fibrillation and interaction with psyllium seed husk heteroxylan

Development and validation of time‐domain 1H‐NMR relaxometry correlation for high‐throughput phenotyping method for lipid contents of lignocellulosic feedstocks

Topochemical Engineering of Cellulose—Carboxymethyl Cellulose Beads: A Low-Field NMR Relaxometry Study

Contact Info

Product

Resources

About

Development and validation of time‐domain ¹H‐NMR relaxometry correlation for high‐throughput phenotyping method for lipid contents of lignocellulosic feedstocks