Octadecylamine as chemical modifier for tuned hydrophobicity of surface modified cellulose: toward organophilic cellulose nanocrystals

Majdoub, Mohammed; Essamlali, Younes; Amadine, Othmane; Ganetri, Ikram; Hafnaoui, Anass; Khouloud, Mehdi; Zahouily, Mohamed

doi:10.1007/s10570-021-04044-w

Cited by 38 publications

(22 citation statements)

References 82 publications

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“…The presence of the 3600~3100 cm −1 band in all testing samples confirms the well preserved cellulose framework. The band between 2940 and 2840 cm −1 is ascribed to the characteristics of the -CH and CH 2 stretching bond of cellulose [ 51 , 52 ]. As compared to the BF sample, with the characteristic peak appearing at 2920 and 2885 cm −1 , the wavenumber of samples with additives shows a bule-shift of the -CH stretching bond to 2928 cm −1 and a red-shift of the -CH 2 stretching bond to 2861 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid

Xue

Yang

et al. 2022

Polymers

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To improve the physical strength of regenerated cellulose fibers, cellulose dissolution was analyzed with a conductor-like screening model for real solvents in which 1-allyl-3-methylimidazolium chloride (AMIMCl) worked only as a hydrogen bond acceptor while dissolving the cellulose. This process could be promoted by the addition of urea, glycerol, and choline chloride. The dissolution and regeneration of cellulose was achieved through dry-jet and wet-spinning. The results demonstrated that the addition of hydrogen bond donors and acceptors either on their own or in combination can enhance the tensile strength, but their effects on the crystallinity of the regenerated fibers were quite limited. Compared with the regenerated fibers without any additives, the tensile strength was improved from 54.43 MPa to 139.62 MPa after introducing the choline chloride and glycerol, while related the crystallinity was only changed from 60.06% to 62.97%. By contrast, a more compact structure and fewer pores on the fiber surface were identified in samples with additives along with well-preserved cellulose frameworks. Besides, it should be noted that an optimization in the overall thermal stability was obtained in samples with additives. The significant effect of regenerated cellulose with the addition of glycerol was attributed to the reduction of cellulose damage by slowing down the dissolution and cross-linking in the cellulose viscose. The enhancement of the physical strength of regenerated cellulose fiber can be realized by the appropriate adjustment of the hydrogen bond distribution in the ionic liquid system with additives.

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Section: Resultsmentioning

confidence: 99%

Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid

Xue

Yang

et al. 2022

Polymers

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“…Organophilic cellulose nanocrystals were prepared via a two-step process involving carboxylation and amidation according to the procedure described in our previous work. 56 Briefly, 100 mL of previously prepared carboxylated cellulose nanocrystals (CNC-COOH) suspension was firstly sonicated for 1 h at ambient temperature to ensure their good dispersibility. Afterwards, 300 mg of octadecylamine (ODA, CH 3 (CH 3 ) 17 NH 2 ) dissolved in 100 mL of anhydrous ethanol was added to the homogenously dispersed CNC-COOH solution under vigorous stirring.…”

Section: Methodsmentioning

confidence: 99%

“…The full characterization of the cellulosic materials including microcrystalline cellulose (MCC), carboxylated cellulose nanocrystals (CNC-COOH) and organophilic cellulose nanocrystals (CNC-ODA) was described in our previous study. 56…”

Section: Methodsmentioning

confidence: 99%

“…In our previous work, we successfully prepared organophilic cellulose nanocrystals with tuned surface hydrophobicity by adopting a novel and efficient chemical functionalization approach. 56 The produced organophilic cellulose nanocrystals displayed outstanding surface hydrophobicity and long-term stability of their colloidal suspension in various organic solvents, indicating their organophilic nature. In addition, the crystalline structure and large aspect ratio of the prepared organophilic cellulose nanocrystals were preserved following the chemical modifications.…”

Section: Introductionmentioning

confidence: 97%

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Nanocomposite-enhanced hydrophobicity effect in biosourced polyurethane with low volume fraction of organophilic CNC: towards solvent-absorbent and porous membranes

et al. 2022

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“…(Majdoub et al, 2021) In detail, the strong absorption peak at around1597 cm − 1 , 1640 cm − 1 were related to the -C-N bonds, indicating successful formation of DHP ring and enamine bonds. (Zeng et al, 2021) In addition, the XPS spectra of different cellulose-based lms are presented in Fig.…”

mentioning

confidence: 97%

Rational Design of Stable Fluorescent and Hydrophobic Cellulose-based Film for Full-band UV-blocking by Surface Modification

Qiu

Liu

Shen

et al. 2022

Preprint

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A novel fluorescent, hydrophobic cellulose-based UV-blocking film was developed via chemical surface modification. Cellulose acetoacetate (CAA) film was firstly regenerated by acetyl acetylation of cellulose in a homogeneous system. Based on this esterified film with acetoacetyl groups, both 1,4-dihydropyridine (DHP) fluorescent ring and hydrophobic octadecylamine (ODA) were bonded to cellulose chains through Hantzsch reaction and the formation of enamine bond, by using a one-pot process under room temperature. The resulting film exhibited bright fluorescent and excellent UV-blocking properties (shielding almost 100% UV), which are very stable even being exposed to long periods of UV radiation, harsh temperature treatment and different solvents. In addition, this film has good hydrophobic feature (the contact angle reach up to 112°). This work provided a facile and environmentally friendly strategy to fabricate multifunctional cellulose-based film, which had great application potential in the field of UV protection, fluorescent materials, packaging and cover materials for greenhouse.

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Octadecylamine as chemical modifier for tuned hydrophobicity of surface modified cellulose: toward organophilic cellulose nanocrystals

Cited by 38 publications

References 82 publications

Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid

Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid

Nanocomposite-enhanced hydrophobicity effect in biosourced polyurethane with low volume fraction of organophilic CNC: towards solvent-absorbent and porous membranes

Rational Design of Stable Fluorescent and Hydrophobic Cellulose-based Film for Full-band UV-blocking by Surface Modification

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