Novel paper sizing agents based on renewables. Part 8: on the binding behavior of reactive sizing agents—the question of covalent versus adsorptive binding

Schwaiger, Lorenz; Zweckmair, Thomas; Sartori, Jürgen; Potthast, Antje; Rosenau, Thomas

doi:10.1007/s10570-015-0794-9

Cited by 8 publications

(9 citation statements)

References 12 publications

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“…By controlling the hydrolysis degree of its methoxy groups, Tang et al achieved oleophobic paper [25] . MSOHO (maleated high oleic sunflower oil) is among the water processable paper coatings [26] . MSOHO, synthesized by ene‐reaction of maleic anhydride with sunflower oil, is a green sizing agent alternative to alkenyl succinimidyl anhydrides (ASA) and alkyl ketene (AKD).…”

Section: Introductionmentioning

confidence: 99%

Nanocellulose for Paper and Textile Coating: The Importance of Surface Chemistry

2022

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Nanocellulose has received enormous scientific interest for its abundance, easy manufacturing, biodegradability, and low cost. Cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) are ideal candidates to replace plastic coating in the textile and paper industry. Thanks to their capacity to form an interconnected network kept together by hydrogen bonds, nanocelluloses perform an unprecedented strengthening action towards cellulose‐ and other fiber‐based materials. Furthermore, nanocellulose use implies greener application procedures, such as deposition from water. The surface chemistry of nanocellulose plays a pivotal role in influencing the performance of the coating: tailored surface functionalization can introduce several properties, such as gas or grease barrier, hydrophobicity, antibacterial and anti‐UV behavior. This review summarizes recent achievements in the use of nanocellulose for paper and textile coating, evidencing critical aspects of coating performances related to deposition technique, nanocellulose morphology, and surface functionalization. Furthermore, beyond focusing on the aspects strictly related to large‐scale coating applications for paper and textile industries, this review includes recent achievements in the use of nanocellulose coating for the safeguarding of Cultural Heritage, an extremely noble and interesting emerging application of nanocellulose, focusing on consolidation of historical paper and archaeological textile. Finally, nanocellulose use in electronic devices as an electrode modifier is highlighted.

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Section: Introductionmentioning

confidence: 99%

Nanocellulose for Paper and Textile Coating: The Importance of Surface Chemistry

2022

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Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

“…An alternative to AKD is alkenyl succinic anhydride (ASA), which may also be used as a paper sizing agent (Lackinger et al 2016). Sizing by ASA is considered superior to AKD by some, as the kinetics are faster (Lackinger et al 2016). Though faster, ASA is seemingly a somewhat poorer hydrophobing agent (CAs < 90°) compared to AKD (CAs < 100°) when compared experimentally on silica surfaces (Lindfors et al 2007).…”

Section: Chemical Hydrophobization Techniques By Molecule Substitutionmentioning

confidence: 99%

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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“…The U.S. production of paper food service ware, including molded pulp fiber containers, exceeds 1.4Mt (Environmental Protection Agency, 2019a), is inexpensive and renewable, but lacks the functional properties PS packaging provides and which consumers have come to expect. A number of different paper additives have been developed that markedly improve the functional properties of paper packaging (Lackinger et al., 2016). Per‐ and polyfluoroalkyl substances (PFAS) are an important and broad class of chemicals that have been used for decades in many consumer and industrial products, including paper packaging.…”

Section: Introductionmentioning

confidence: 99%

Per‐ and polyfluoroalkyl substances and their alternatives in paper food packaging

Glenn

Shogren

Jin

et al. 2021

Comp Rev Food Sci Food Safe

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Per‐ and polyfluoroalkyl substances (PFAS) have been used in food contact paper and paperboard for decades due to their unique ability to provide both moisture and oil/grease resistance. Once thought to be innocuous, it is now clear that long chain PFAS bioaccumulate and are linked to reproductive and developmental abnormalities, suppressed immune response, and tumor formation. Second‐generation PFAS have shorter biological half‐lives but concerns about health risks from chronic exposure underscore the need for safe substitutes. Waxes and polymer film laminates of polyethylene, poly(ethylene‐co‐vinyl alcohol), and polyethylene terephthalate are commonly used alternatives. However, such laminates are neither compostable nor recyclable. Lamination with biodegradable polymers, including polyesters, such as polylactic acid (PLA), polybutylene adipate terephthalate, polybutylene succinate, and polyhydroxyalkanoates, are of growing research and commercial interest. PLA films are perhaps the most viable alternative, but performance and compostability are suboptimal. Surface sizings and coatings of starches, chitosan, alginates, micro‐ and nanofibrilated cellulose, and gelatins provide adequate oil barrier properties but have poor moisture resistance without chemical modification. Plant proteins, including soy, wheat gluten, and corn zein, have been tested as paper coatings with soy being the most commercially important. Internal sizing agents, such as alkyl ketene dimers, alkenyl succinic anhydride, and rosin, improve moisture resistance but are poor oil/grease barriers. The difficulty in finding a viable replacement for PFAS chemicals that is cost‐effective, fully biodegradable, and environmentally sound underscores the need for more research to improve barrier properties and process economics in food packaging products.

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Novel paper sizing agents based on renewables. Part 8: on the binding behavior of reactive sizing agents—the question of covalent versus adsorptive binding

Cited by 8 publications

References 12 publications

Nanocellulose for Paper and Textile Coating: The Importance of Surface Chemistry

Nanocellulose for Paper and Textile Coating: The Importance of Surface Chemistry

Hydrophobization of lignocellulosic materials part II: chemical modification

Per‐ and polyfluoroalkyl substances and their alternatives in paper food packaging

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