Super-hydrophobic poly (lactic acid) by controlling the hierarchical structure and polymorphic transformation

Sun, Xin; Yang, Shengdu; Xue, Bai; Huo, Kangwei; Li, Xujuan; Tian, Ye; Liao, Xingyan; Xie, Lan; Qin, Shuhao; Xu, Kaihua; Zheng, Qiang

doi:10.1016/j.cej.2020.125297

Cited by 37 publications

(28 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PLLA fibrous material was hydrophobic, with a water contact angle of 117 • ± 2.5 • (Figure 2a). The measured value for the pure PLLA was close to the values found in the literature [35]. The measured contact angle values of the PLLA/5-Cl8Q and PLLA/K5N8Q composite fibrous materials were 120 • ± 3 • and 118.0 • ± 2 • , respectively (Figure 2b,c).…”

Section: Contact Angle Measurementssupporting

confidence: 87%

Electrospun Polymer-Fungicide Nanocomposites for Grapevine Protection

et al. 2021

View full text Add to dashboard Cite

Nowadays, diseases in plants are a worldwide problem. Fungi represent the largest number of plant pathogens and are responsible for a range of serious plant diseases. Esca is a grapevine disease caused mainly by fungal pathogens Phaeomoniella chlamydospora (P. chlamydospora) and Phaeoacremonium aleophilum (P. aleophilum). The currently proposed methods to fight esca are not curative. In this study, polymer composites based on biodegradable polymer containing chemical fungicides with antifungal activity were successfully prepared by electrospinning. The obtained materials were hydrophobic with good mechanical properties. In vitro studies demonstrated that the fungicide release was higher from PLLA/K5N8Q fibrous mats (ca. 72% for 50 h) compared to the released drug amount from PLLA/5-Cl8Q materials (ca. 52% for 50 h), which is due to the better water-solubility of the salt. The antifungal activity of the fibrous materials against P. chlamydospora and P. aleophilum was studied as well. The incorporation of the fungicide in the biodegradable fibers resulted in the inhibition of fungal growth. The obtained materials are perspective candidates for the protection of vines from the penetration and growth of fungal pathogens.

show abstract

Section: Contact Angle Measurementssupporting

confidence: 87%

Electrospun Polymer-Fungicide Nanocomposites for Grapevine Protection

et al. 2021

View full text Add to dashboard Cite

show abstract

“… 49 , 50 Alternatively, the addition of poly- d -lactic acid (PDLA) polymer to the poly( l -lactic acid) (PLLA) polymer resulted in the formation of stereo-complexed crystals, giving a morphology that was very different from the porous structure of pure PLLA with a water θ up to 155° and having good anti-icing properties. 51 A SH-PLA foam to be used for oil–water separation was prepared after dissolving PLA in dioxane solvent and applying freeze-drying and skin peeling. This PLA foam with a water θ of 151° can absorb oil 32 times its own weight through the micro- and nanostructures on its surface.…”

Section: Introductionmentioning

confidence: 99%

“…The same group prepared SH-PLA surfaces using solvent/ternary non-solvent-coated PLA films to control the adhesion of water. , Only chloroform was used as the solvent, and n -butyl acetate, absolute ethanol, and n -butyl alcohol were mixed together at equal volume ratios to be used as the ternary non-solvent. The obtained polymer solution was coated onto another flat PLA substrate to form an SH-PLA layer and used to form microdroplet arrays in biochips for a no-mass-loss transport process. , The addition of nanosilica particles into the PLA polymer solution was tried, and water θ increased up to 167° for the final composite PLA film, giving a porous network structure after phase inversion. , Alternatively, the addition of poly- d -lactic acid (PDLA) polymer to the poly( l -lactic acid) (PLLA) polymer resulted in the formation of stereo-complexed crystals, giving a morphology that was very different from the porous structure of pure PLLA with a water θ up to 155° and having good anti-icing properties . A SH-PLA foam to be used for oil–water separation was prepared after dissolving PLA in dioxane solvent and applying freeze-drying and skin peeling.…”

Section: Introductionmentioning

confidence: 99%

Wetting of Superhydrophobic Polylactic Acid Micropillared Patterns

2022

View full text Add to dashboard Cite

Superhydrophobic (SH) polylactic acid (PLA) surfaces were previously produced by various methods and used especially in biomedical applications and oil/water separation processes after 2008. However, the wettability of SH-PLA patterns containing micropillars has not been investigated before. In this study, PLA patterns having regular microstructured pillars with 12 different pillar diameters and pillar-to-pillar distances were prepared by hot pressing pre-flattened PLA sheets onto preformed polydimethylsiloxane (PDMS) soft molds having micro-sized pits. PDMS templates were previously prepared by photolithography using SU-8 molds. Apparent, advancing, and receding water contact angle measurements were carried out on the PLA patterns containing micropillars, and the morphology of the patterns was examined by optical and SEM microscopy. The largest contact angle obtained without the surface modification of the pure PLA pattern was 139°. Then, PLA micropatterns were hydrophobized using three types of silanes via chemical vapor deposition method, and SH-PLA patterns were obtained having θs of up to 167°. It was found that the highest θ values could be obtained when PLA pattern samples were coated with a silane containing a fluorine atom in its chemical structure. Washing and service life stability tests were also performed on the coated pattern samples and all of the silane coatings on the PLA patterns were found to be resistant over a 6 month period.

show abstract

“…Regardless of the composition, all treatments had a contact angle greater than 90º, implying the hydrophobic character of the membranes of ultra ne bers formed. This performance was expected due to the fact that the PLA has a hydrophobic character (Sun et al, 2020). As essential oils are composed of highly hydrophobic molecules (Dhi , Bellili, Jazi, Bahloul, & Mnif, 2016), it was expected that the presence of PPEO would increase water repulsion.…”

Section: Wettability Of the Ultra Ne Ber Membranesmentioning

confidence: 99%

Antimicrobial properties of PLA membranes loaded with pink pepper (Schinus terebinthifolius Raddi) essential oil applied in simulated cream cheese packaging

et al. 2022

View full text Add to dashboard Cite

Ultra ne ber membranes of polylactic acid (PLA) 8% (w/v) loaded with pink pepper essential oil (PPEO) in 10, 20 and 30% (v/v) were produced and evaluated for antimicrobial potential against the bacteria Escherichia coli, Salmonella enteritidis, Listeria monocytogenes and Staphylococcus aureus. The membranes were applied in simulated cream cheese packaging and characterized by morphological, thermal, structural, antimicrobial and wettability analysis. The addition of PPEO reduced the diameter of bers and increased the initial degradation temperature in relation to pure PPEO. The ultra ne membranes had hydrophobic character. The PPEO presented myrcene as major component and had antimicrobial action for S. aureus and L. monocytogenes. The membranes applied to the cream cheese packaging showed inhibitory effect on the 21st day of storage, for L. monocytogenes. For S. aureus, the membranes inhibited the growth of the colonies on days 14 and 21, with reductions of 30 and 62%, respectively. HighlightsProtective thermal effect of PLA on PPEO.Membranes of ultra ne bers showed hydrophobicity.Potential action of PPEO volatile compounds in reducing bacteria.Antimicrobial effect of membranes in simulated cream cheese packaging.where the mixture is heated, with the main advantage of extracting plant material below 100 ºC (El Asbahani et al., 2015). Also, to apply essential oils in packaging, one must pay attention to some prerequisites, as well as knowing the properties of the oils, the minimum inhibitory concentrations, the target microorganisms, the mechanisms of action and possible interactions with the matrix to feed (Hyldgaard, Mygind, & Meyer, 2012).Schinus terebinthifolius Raddi (Anacardiaceae) is a species native to Brazil, known as aroeira-vermelha, widely distributed in the southern region (Souza, Arthur, & Nogueira, 2012). Literature reports con rmed

show abstract

Super-hydrophobic poly (lactic acid) by controlling the hierarchical structure and polymorphic transformation

Cited by 37 publications

References 67 publications

Electrospun Polymer-Fungicide Nanocomposites for Grapevine Protection

Electrospun Polymer-Fungicide Nanocomposites for Grapevine Protection

Wetting of Superhydrophobic Polylactic Acid Micropillared Patterns

Antimicrobial properties of PLA membranes loaded with pink pepper (Schinus terebinthifolius Raddi) essential oil applied in simulated cream cheese packaging

Contact Info

Product

Resources

About