Cellulose fatty acid ester coated papers for stand‐up pouch applications

Willberg‐Keyriläinen, Pia; Ropponen, Jarmo; Alakomi, Hanna-Leena; Vartiainen, Jari

doi:10.1002/app.46936

Cited by 27 publications

(10 citation statements)

References 31 publications

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“…Long chain cellulose esters are bio-based materials, which are synthesized from longer chain fatty acids (chain length of fatty substituent ≥ C6) than currently commercially available thermoplastic cellulose acetate (CA), cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB) esters (Havimo et al., 2011). These long chain cellulose esters also have relatively good mechanical and barrier properties and therefore show promising potential in several applications such as coatings, films and bio-plastics (Havimo et al., 2011; Cao et al., 2014; Willberg-Keyriläinen et al., 2018a; Willberg-Keyriläinen et al., 2018b).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of esterification routes for long chain cellulose esters

Willberg‐Keyriläinen

Ropponen

2019

Heliyon

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Long chain cellulose esters are internally plasticized bio-based materials, which have good future potential in several applications such as coatings, films and plastics. The long chain cellulose esters with different side chain lengths were synthesized using different esterification methods. When homogeneous esterification was used, the acyl chloride method was the most effective esterification method and cellulose esters prepared using this method have the highest degree of substitution values (DS). In this case, the long chain cellulose esters showed DS values from 0.3 to 1.3 depending on the side chain length of cellulose esters. CDI activation, vinyl transesterification and anhydride routes resulted in somewhat lower DS values. The cellulose was also pretreated with ozone, which decreased cellulose molar mass, and resulted in synthesized cellulose esters having higher DS and better reaction efficiency than untreated cellulose. When heterogeneous esterifications were used, only acyl chloride method seemed to work.

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Section: Introductionmentioning

confidence: 99%

Evaluation of esterification routes for long chain cellulose esters

Willberg‐Keyriläinen

Ropponen

2019

Heliyon

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“…For example, cellulose acetate foils can be attached to the surface of paper or paperboard stock by adhesives or hot laminating either alone or combined with aluminium foils to obtain foods packaging. Using the electrospinning process cellulose acetate nanofibers have been obtained, with potential applications in packaging materials for fresh fruits and vegetables [34][35][36].…”

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confidence: 99%

Review on Polysaccharides Used in Coatings for Food Packaging Papers

2020

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Paper and board show many advantages as packaging materials, but the current technologies employed to obtain adequate barrier properties for food packaging use synthetic polymers coating and lamination with plastic or aluminium foils—treatments which have a negative impact on packaging sustainability, poor recyclability and lack of biodegradability. Recently, biopolymers have attracted increased attention as paper coatings, which can provide new combinations in composite formulas to meet the requirements of food packaging. The number of studies on biopolymers for developing barrier properties of packaging materials is increasing, but only a few of them are addressed to food packaging paper. Polysaccharides are viewed as the main candidates to substitute oil-based polymers in food paper coating, due to their film forming ability, good affinity for paper substrate, appropriate barrier to gases and aroma, and positive effect on mechanical strength. Additionally, these biopolymers are biodegradable, non-toxic and act as a matrix for incorporation additives with specific functionalities for coated paper (i.e., active-antimicrobial properties). This paper presents an overview on the availability and application of polysaccharides from vegetal and marine biomass in coatings for foods packaging paper. The extraction methods, chemical modification and combination routes of these biopolymers in coatings for paper packaging are discussed.

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“…Nanocelluloses may be chemically surface modified with hydrophobic groups to enhance water resistance (Chin et al., 2018). Bulk modified cellulose fatty acid esters have also been prepared, which have much improved water (Wang et al., 2020) and grease (Willberg‐Keyriläinen et al., 2018) resistance.…”

Section: Surface Sizingmentioning

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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Cellulose fatty acid ester coated papers for stand‐up pouch applications

Cited by 27 publications

References 31 publications

Evaluation of esterification routes for long chain cellulose esters

Evaluation of esterification routes for long chain cellulose esters

Review on Polysaccharides Used in Coatings for Food Packaging Papers

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

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