Controllable degradation rates, antibacterial, free-standing and highly transparent films based on polylactic acid and chitosan

Han, Wei; Ren, Jiaoyu; Xuan, Hongyun; Ge, Liqin

doi:10.1016/j.colsurfa.2018.01.022

Cited by 45 publications

(26 citation statements)

References 35 publications

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“…This showed that the CS content played an important role in the antimicrobial performance of the film, which was consistent with the experimental results of Liu et al [29]. Higher CS contents may cause more proteins to bind to negatively charged lipopolysaccharides, which are easily absorbed by the cell surface, thus inhibiting nutrient transport into cells and ultimately resulting in cell death [30].…”

Section: Resultssupporting

confidence: 87%

Preparation of Chitosan/Corn Starch/Cinnamaldehyde Films for Strawberry Preservation

Wang

Lü

et al. 2019

Foods

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In this study, the casting method was used to make chitosan (CS)/corn starch/cinnamaldehyde film, and the preservation performance of the film was examined. The results showed that the tensile strength of the film can reach to 31.24 ± 0.22 MPa when the mass ratios of CS, corn starch, and glycerin were 2.5%, 7%, and 0.5% respectively. The addition of cinnamaldehyde made the films have great inhibitory effect on Botrytis cinerea, Rhizopus, and Escherichia coli. In particular, the film had a significant fresh-keeping effect on strawberries, which reduced the loss of nutritional value, when aiming at soluble solids, titratable acid value, weight loss rate, and other indexes of strawberries. Thus, the films can slow down the physiological changes of strawberries and extend their shelf life to 11 days. Therefore, this work demonstrates the noteworthy potential of these novel films, incorporating natural antimicrobial compounds as innovative solutions to be used in active food packaging to extend the shelf-life of food products.

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Section: Resultssupporting

confidence: 87%

Preparation of Chitosan/Corn Starch/Cinnamaldehyde Films for Strawberry Preservation

Wang

Lü

et al. 2019

Foods

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“…Figure 2 reports the FTIR-ATR spectra of freeze-dried CS/β-GP hydrogel, β-GP and freeze-dried CS storage solution. The characteristic peaks of CS at 3281 cm −1 ( stretching O-H), 2882 cm −1 ( bending –CH), 1613 cm −1 ( stretching C=O of secondary amine), 1513 cm −1 ( bending -NH 2 , primary amine), 1379 cm −1 ( bending -CH 2 , 1151 cm −1 ( stretching C-O-C), 1062 cm −1 ( stretching C-O) 19 are present in the freeze-dried CS storage solution and freeze-dried CS/β-GP hydrogel (Fig. 2A,C).…”

Section: Resultsmentioning

confidence: 99%

Chitosan-based hydrogel to support the paracrine activity of mesenchymal stem cells in spinal cord injury treatment

Boido

Ghibaudi

Gentile

et al. 2019

Sci Rep

104

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Advanced therapies which combine cells with biomaterial-based carriers are recognized as an emerging and powerful method to treat challenging diseases, such as spinal cord injury (SCI). By enhancing transplanted cell survival and grafting, biomimetic hydrogels can be properly engineered to encapsulate cells and locate them at the injured site in a minimally invasive way. In this work, chitosan (CS) based hydrogels were developed to host mesenchymal stem cells (MSCs), since their paracrine action can therapeutically enhance the SC regeneration, limiting the formation of a glial scar and reducing cell death at the injured site. An injectable and highly permeable CS-based hydrogel was fabricated having a rapid gelation upon temperature increase from 0 to 37 °C. CS was selected as former material both for its high biocompatibility that guarantees the proper environment for MSCs survival and for its ability to provide anti-inflammatory and anti-oxidant cues. MSCs were mixed with the hydrogel solution prior to gelation. MSC viability was not affected by the CS hydrogel and encapsulated MSCs were able to release MSC-vesicles as well as to maintain their anti-oxidant features. Finally, preliminary in vivo tests on SCI mice revealed good handling of the CS solution loading MSCs during implantation and high encapsulated MSCs survival after 7 days.

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“…It is derived from renewable resources, such as plant fiber, starch, cellulose, and protein; as well as nonrenewable resources such as oil, natural gas, and coal 7–8 . It can be degraded into CO 2 or CH 4 and H 2 O in soil, 9–10 compost, 11 anaerobic digestion, 12 or aqueous medium 13 . The degradation processes of current state‐of‐the‐art biodegradable plastics, such as polylactic acid (PLA), poly(butylene adipate‐co‐terephthalate) (PBAT), starch‐based degradable plastics, polybutylene succinate (PBS), poly(ε‐caprolactone) (PCL), polyhydroxyalkanoate (PHA), atactic poly[(R,S)‐3‐hydroxybutyrate] (a‐PHB), poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV), polyglycolic acid (PGA), and polyvinyl alcohol (PVA) are affected by heat, water, oxygen and enzymes, and their degradation can be divided into either ester‐based hydrolytic degradation or enzymatic degradation 14–16 .…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl alcohol and acidity‐regulating KH₂PO₄ synergistically accelerated degradation of PBAT/PLA composites

Liu

Shen

et al. 2020

J of Applied Polymer Sci

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Poly(butylene adipate‐co‐terephthalate) (PBAT)/polylactic acid (PLA) composites were prepared by water‐soluble polyvinyl alcohol (PVA) and degradation‐promoting agent (DPA) which were made from acidity‐regulating KH2PO4 and halloysite by a physical layer‐by‐layer coating method. The effect of PVA and DPA on the biodegradation of PBAT/PLA composites in the cross‐sectional morphology, thermal properties, molecular structure, due to degradation was evaluated using a host of characterization methods. The results showed that PVA had a good solubilizing effect on the composite system and improved the overall compatibility. DPA had little effect on the compatibility, crystallinity, and thermal stability of the composite system, but greatly accelerated the degradation. The interior of composite material containing DPA (Com‐DPA) was shown to be severely damaged after 29 weeks of degradation, which was attributed to preferential degradation of amorphous regions of the composite by ester hydrolysis. Our results demonstrated the PVA and DPA worked synergistically to promote swelling and diffusivity of degradation products, and provided an acid environment for enhancing ester hydrolysis. This technology may have good prospects for accelerated degradation of materials in agricultural applications.

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Controllable degradation rates, antibacterial, free-standing and highly transparent films based on polylactic acid and chitosan

Cited by 45 publications

References 35 publications

Preparation of Chitosan/Corn Starch/Cinnamaldehyde Films for Strawberry Preservation

Preparation of Chitosan/Corn Starch/Cinnamaldehyde Films for Strawberry Preservation

Chitosan-based hydrogel to support the paracrine activity of mesenchymal stem cells in spinal cord injury treatment

Polyvinyl alcohol and acidity‐regulating KH₂PO₄ synergistically accelerated degradation of PBAT/PLA composites

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Controllable degradation rates, antibacterial, free-standing and highly transparent films based on polylactic acid and chitosan

Cited by 45 publications

References 35 publications

Preparation of Chitosan/Corn Starch/Cinnamaldehyde Films for Strawberry Preservation

Preparation of Chitosan/Corn Starch/Cinnamaldehyde Films for Strawberry Preservation

Chitosan-based hydrogel to support the paracrine activity of mesenchymal stem cells in spinal cord injury treatment

Polyvinyl alcohol and acidity‐regulating KH2PO4 synergistically accelerated degradation of PBAT/PLA composites

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Polyvinyl alcohol and acidity‐regulating KH₂PO₄ synergistically accelerated degradation of PBAT/PLA composites