Sticky hydrophobic behavior of cellulose substrates impregnated with alkyl ketene dimer (AKD) via sub- and supercritical carbon dioxide

Adenekan, Kolawole; Hutton-Prager, Brenda

doi:10.1016/j.colsurfa.2018.09.073

Cited by 15 publications

(12 citation statements)

References 47 publications

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“…The contact angles are the maximum angles found in our literature review. Amidation < 94° (Bendahou et al 2015), alkyl ketene dimers (AKD) < 140° (Adenekan and Hutton-Prager 2019), alkenyl succinic anhydride (ASA) < 116° (Arancibia et al 2021), carbamylation < 148° (Tursi et al 2018), esterification < 158° (Geissler et al 2013), etherification < 89.4° (Lee et al 2020), silylation < 163° (Orsolini et al 2018), particle deposition, then silylation < 160.5° (Sujing et al 2010) Fig. 2 Alkyl ketene dimers (AKDs) attach covalently to cellulose hydroxyl groups Cellulose 1 3…”

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

“…Innovation in AKD sizing is a continuous process . Recently, novel methods of impregnating materials with AKD using supercritical CO 2 have been used (Adenekan and Hutton-Prager 2019). The CO 2 pressure was found to be important at the beginning of impregnation.…”

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

“…Even though a lot is known about this technique, it seems that the obtained contact angles are highly variable, from about 100° (Li and Neivandt 2019) to 140° (Adenekan and Hutton-Prager 2019). Moreover, it seems to be unclear whether AKD binds cellulose by hydrogen bonding or covalently (Lindström and Larsson 2008;Adenekan and Hutton-Prager 2019;Li and Neivandt 2019). The importance of the type of binding is difficult to discern, as materials where the binding is believed to be electrostatic seemingly have a long lifetime and high contact angle (e. g. as in Adenekan and Hutton-Prager (2019)).…”

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

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Hydrophobization of lignocellulosic materials part II: chemical modification

Rodríguez-Fabià¹,

Torstensen

Johansson³

et al. 2022

Cellulose

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Lignocellulosic materials with hydrophobic properties are of great interest for developing sustainable products that can be used in various applications such as packaging, water-repellent and self-cleaning materials, oil and water separation or as reinforcements in biocomposite materials. The hydroxyl functional groups present in cellulose provide the possibility to perform various chemical modifications to the cellulosic substrates that can increase their hydrophobicity. This review is the second part of a comprehensive review on hydrophobization of lignocellulosic materials and summarizes the recent advances in the chemical modification of such substrates. The methods described in this review can provide changes in the hydrophilicity of the materials that range from a small decrease in the initial hydrophilicity of the substrate (contact angles below 90°) to superhydrophobic properties (contact angles above 150°). Additional attention has been paid to whether the modification is limited to the surface of the substrate or if it occurs in the bulk of the material. We also discuss hydrophobized cellulose material applications in packing and oil/water purification. Graphical abstract

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Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrophobization of lignocellulosic materials part II: chemical modification

Rodríguez-Fabià¹,

Torstensen

Johansson³

et al. 2022

Cellulose

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“…So, it is of vital importance to endow cellulose based paper with the hydrophobic property. Tradition methods for the fabrication of hydrophobic paper were mainly based on surface coating with waxy derived materials [2,3,4,5] such as alkyl ketene dimer, carnauba wax, and beeswax. The thermal instability of the wax largely limited the application of the papers.…”

Section: Introductionmentioning

confidence: 99%

Facile Approach to Develop Hierarchical Roughness fiber@SiO2 Blocks for Superhydrophobic Paper

Wang¹,

Xiong

Chen

et al. 2019

Materials

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Papers with nanoscaled surface roughness and hydrophobically modification have been widely used in daily life. However, the relatively complex preparation process, high costs and harmful compounds have largely limited their applications. This research aims to fabricate superhydrophobic papers with low cost and nontoxic materials. The surface of cellulose fibers was initially coated with a film of SiO2 nanoparticles via sol-gel process. After papermaking and subsequent modification with hexadecyltrimethoxysilane through a simple solution-immersion process, the paper showed excellent superhydrophobic properties, with water contact angles (WCA) larger than 150°. Moreover, the prepared paper also showed superior mechanical durability against 10 times of deformation. The whole preparation process was carried out in a mild environment, with no intricate instruments or toxic chemicals, which has the potential of large-scale industrial production and application.

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