Non-covalently cationized nanocellulose from hemp: Kinetics, key properties, and paper strengthening

Aguado, Roberto; Tarrès, Quim; Mutjé, Pere; Pèlach, M. Àngels; Delgado-Aguilar, Marc

doi:10.1016/j.indcrop.2022.115582

Cited by 10 publications

(9 citation statements)

References 36 publications

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“…The cationized-mercerized yarns exhibit high dyeing efficiency. According to Correia et al [45] and Aguado et al [48] studies, once the hemp fibers undergo the cationization treatment, there will be ionic bonding between the primary hydroxy group on cellulose and polyelectrolyte, as shown in Scheme 1. Furthermore, Young et al [57] reported that by using TDO as a reducing agent, indigo would be transformed into leuco-indigo form, as shown in Scheme 2.…”

Section: Color Strengthmentioning

confidence: 99%

“…Moreover, the modification of natural fiber with cationic polyelectrolytes is one of the most efficient methods for enhancing dye uptake, such as using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPTAC) [45][46][47], poly acrylamide-co-diallyldimethylammonium chloride (PAcD) [45], poly[bis(2-chloroethyl) ether-alt-1,3-bis [3-(dimethylamino)propyl]urea]quaternized (P42) [46], and poly-DADMAC [45,48] which is expected to improve the fiber dyeing efficiency with indigo and lac in this research. The latter one, PolyDADMAC, proven to be effective as an additive in dyeing processes with synthetic dyes [49], is a water-soluble cationic polyelectrolyte chosen for cationization treatment to enhance the dyeing efficiency of natural dyes due to its large electrostatic attractive force [50].…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the efficiency of hemp fiber dyeing with natural dyes: Indigo and lac

CHOUYTAN,

THIRAWAT,

KHOTRADHA

et al. 2024

J Met Mater Miner

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Hemp fibers dyed with natural dyes are environmentally sustainable, but it is typically difficult to achieve an intense shade and washing durability. In this study, mercerization and cationization using polyelectrolyte, Poly-diallyldimethylammonium chloride (polyDADMAC), were chosen to enhance the dyeing efficiency and mechanical properties. Indigo and lac were chosen as natural dyes due to their widespread use. SEM demonstrated that untreated fibers contained the non-cellulose boundary layer on the surfaces, but after mercerization, the surfaces were smoother, making them suitable for absorbing natural dyes. In agreement with the FT-IR, the spectra of non-cellulose disappeared after mercerizing. Following cationization, the FT-IR spectra confirmed the consequences of using poly-DADMAC. Tensile testing demonstrated that mercerized hemp yarns were 34.1% stronger compared to untreated hemp yarns due to the decrease in non-cellulose content and that the intermolecular attraction of cellulose was not disturbed. The color strength and fastness properties were described by the K/S value. Mercerization considerably affected the K/S of indigo dyeing, while cationization affected lac dyeing significantly. Besides that, both treatments improved fastness properties as well.

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Section: Color Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing the efficiency of hemp fiber dyeing with natural dyes: Indigo and lac

CHOUYTAN,

THIRAWAT,

KHOTRADHA

et al. 2024

J Met Mater Miner

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“…The nanofibrillation process was more efficient when it resulted in a larger exposed surface area of the cellulosic fibers, which in turn leads to a higher surface charge. The determination of the cationic demand has been evaluated through cationization, which assessed the surface adsorption mechanisms between the -CH 2 -O-groups of cellulose fibers in an alkaline medium and the quaternary ammonium groups of polyDADMAC [74]. By defining the specific surface area of a single polyDADMAC molecule, it would then be possible to theoretically determine the specific surface area and the diameter of NC.…”

Section: Quality Index Of (L)cnfs and Chemical Characterizationmentioning

confidence: 99%

“…Although the presence of lignin in the cellulose pulp affected the nanofibrillation process, the TEMPO-mediated oxidation treatment resulted in a higher nanofibrillation yield compared to the mechanical pre-treatment. The highest nanofibrillation yield achieved for (L)CNFs-TO is due to the conversion of C6 primary hydroxyl groups into carboxylic groups [68,69], which promoted fiber repulsion and facilitated fibrillation surface adsorption mechanisms between the -CH2-Ogroups of cellulose fibers in an alkaline medium and the quaternary ammonium groups of polyDADMAC [74]. By defining the specific surface area of a single polyDADMAC molecule, it would then be possible to theoretically determine the specific surface area and the diameter of NC.…”

Section: Quality Index Of (L)cnfs and Chemical Characterizationmentioning

confidence: 99%

Nanostructured Cellulose-Based Aerogels: Influence of Chemical/Mechanical Cascade Processes on Quality Index for Benchmarking Dye Pollutant Adsorbents in Wastewater Treatment

Pirozzi,

Rincón,

Espinosa

et al. 2023

Gels

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(1) Background: Nanostructured cellulose has emerged as an efficient bio-adsorbent aerogel material, offering biocompatibility and renewable sourcing advantages. This study focuses on isolating (ligno)cellulose nanofibers ((L)CNFs) from barley straw and producing aerogels to develop sustainable and highly efficient decontamination systems. (2) Methods: (Ligno)cellulose pulp has been isolated from barley straw through a pulping process, and was subsequently deconstructed into nanofibers employing various pre-treatment methods (TEMPO-mediated oxidation process or PFI beater mechanical treatment) followed by the high-pressure homogenization (HPH) process. (3) Results: The aerogels made by (L)CNFs, with a higher crystallinity degree, larger aspect ratio, lower shrinkage rate, and higher Young’s modulus than cellulose aerogels, successfully adsorb and remove organic dye pollutants from wastewater. (L)CNF-based aerogels, with a quality index (determined using four characterization parameters) above 70%, exhibited outstanding contaminant removal capacity over 80%. The high specific surface area of nanocellulose isolated using the TEMPO oxidation process significantly enhanced the affinity and interactions between hydroxyl and carboxyl groups of nanofibers and cationic groups of contaminants. The efficacy in adsorbing cationic dyes in wastewater onto the aerogels was verified by the Langmuir adsorption isotherm model. (4) Conclusions: This study offers insights into designing and applying advanced (L)CNF-based aerogels as efficient wastewater decontamination and environmental remediation platforms.

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“…Finding substances that can fortify paper has been the subject of some studies. Aminoalkylalkoxysilane copolymer, 15 carbon nanotubes/graphene oxide nanocomposite cross‐linked by copper ions, 16 poly(diallyldimethylammonium chloride) containing hemp pulps, 17 polyphenylene sulfide composite with aramid chopped fibers, 18 chemically modified hemicelluloses by carboxymethylation, 19 gum Arabic, 20 2,3‐epoxypropyl trimethyl ammonium chloride, 21 laccase‐TEMPO system, 22 Ag‐functionalized nanocrystalline cellulose, 23 and magnesium hydroxide 24 were all used as strengthening agents in papermaking. Looking for another opportunity in the paper industry, these studies have pointed to strengthening agents for papers, rather than modifying recycled pulp fibers.…”

Section: Introductionmentioning

confidence: 99%

Styrene/acrylate copolymer emulsions as strengthening agents for kraft bagasse pulp: A way for enhancing the mechanical properties of paper

Morsi,

Abd El‐Sayed,

Ismail

et al. 2024

J of Applied Polymer Sci

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Although styrene acrylate emulsions (SAE) have demonstrated promising applications as surface sizing agents for paper, their strengthening effect on pulp fibers in papermaking is not clear. In this study, bagasse fibers, an agricultural waste, were treated with SAE to study the influences on the mechanical properties of the produced papers. SAE copolymers with hard chain (H‐PSA) and soft chain (S‐PSA) were prepared and added to bagasse pulp slurry at concentrations of 1%–4% by weight. The findings indicated that for the soft and hard copolymers, the glass transition temperatures were 19.5 and 26.8°C and their emulsion particle sizes were 166 and 182 nm, respectively. The copolymers strengthened the produced paper by wrapping around and forming a network of chemical and physical bonds with the pulp fibers. Papers treated with 3% H‐PSA exhibited the optimum improvement in tensile strength (38 MPa) and breaking length (67 m) by 13% and 64%, respectively. Treated papers were negatively affected by UV radiation due to phenyl groups spread along the chains. The copolymers demonstrated good wet‐strength properties achieved by self‐ and co‐crosslinked networks. The prepared paper sheets showed a preference for the mechanical properties of treated samples over the untreated ones.

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Non-covalently cationized nanocellulose from hemp: Kinetics, key properties, and paper strengthening

Cited by 10 publications

References 36 publications

Enhancing the efficiency of hemp fiber dyeing with natural dyes: Indigo and lac

Enhancing the efficiency of hemp fiber dyeing with natural dyes: Indigo and lac

Nanostructured Cellulose-Based Aerogels: Influence of Chemical/Mechanical Cascade Processes on Quality Index for Benchmarking Dye Pollutant Adsorbents in Wastewater Treatment

Styrene/acrylate copolymer emulsions as strengthening agents for kraft bagasse pulp: A way for enhancing the mechanical properties of paper

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