Modification of PLA-Based Films by Grafting or Coating

Abstract

Recently, the demand for the use of natural polymers in the cosmetic, biomedical, and sanitary sectors has been increasing. In order to meet specific functional properties of the products, usually, the incorporation of the active component is required. One of the main problems is enabling compatibility between hydrophobic and hydrophilic surfaces. Therefore, surface modification is necessary. Poly(lactide) (PLA) is a natural polymer that has attracted a lot ofattention in recent years. It is bio-based, can be produced from carbohydrate sources like corn, and it is biodegradable. The main goal of this work was the functionalization of PLA, inserting antiseptic and anti-inflammatory nanostructured systems based on chitin nanofibrils–nanolignin complexes ready to be used in the biomedical, cosmetics, and sanitary sectors. The specific challenge of this investigation was to increase the interaction between the hydrophobic PLA matrix with hydrophilic chitin–lignin nanoparticle complexes. First, chemical modification via the “grafting from” method using lactide oligomers was performed. Then, active coatings with modified and unmodified chitin–lignin nanoparticle complexes were prepared and applied on extruded PLA-based sheets. The chemical, thermal, and mechanical characterization of prepared samples was carried out and the obtained results were discussed.

Trends in Surgical and Beauty Masks for a Cleaner Environment

“…These new and smart beauty masks, processed and distributed in the dry state, and activated by water, only when used, may be considered innovative and safe because they are free of preservatives, emulsifiers, colors, fragrances and other chemicals [22,49,50,[71][72][73]86]. The active ingredients, in fact, are directly linked to the tissue's fibers, during the producing process [49,50,57,[87][88][89]91].…”

“…Hence the coating of PLA non-woven and their substrates with functional compounds incorporating antioxidant, anti-inflammatory and skin regenerative properties, seems to be a relevant process, yet studied by several authors. Miletić et al [72] developed active coatings with modified and unmodified chitin-lignin nanoparticle complexes to apply them on extruded PLA-based sheets.…”

“…be a relevant process, yet studied by several authors. Miletić et al [72] developed active coatings with modified and unmodified chitin-lignin nanoparticle complexes to apply them on extruded PLAbased sheets.…”

Biobased and Eco-Compatible Beauty Films Coated with Chitin Nanofibrils, Nanolignin and Vitamin E

“…Moreover, chitin nanofibrils-nanolignin complexes (CN-LG) can be prepared by gelation method, incorporating selected molecules [4]. Examples are complexes incorporating glycyrrhetic acid (GA) [24] or niacinamide [25], that can be selected for their antiinflammatory properties.…”

Surface Modification of Poly(l-lactic acid) through Stereocomplexation with Enantiomeric Poly(d-lactic acid) and Its Copolymer

“…Many researchers have recently devoted attention to the surface modification of PLA in order to improve PLA performance and expand its applications [ 4 , 23 , 24 , 25 , 26 , 27 , 28 ]. Aulin [ 29 ] built up a transparent nano-cellulose multilayer film on PLA with adjustable gas barrier properties using the layer-by-layer deposition method.…”