scholarly journals Antibacterial Films Based on Polylactide with the Addition of Quercetin and Poly(Ethylene Glycol)

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1643
Author(s):  
Ewa Olewnik-Kruszkowska ◽  
Magdalena Gierszewska ◽  
Agnieszka Richert ◽  
Sylwia Grabska-Zielińska ◽  
Anna Rudawska ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Young Modulus ◽  
Mechanical And Thermal Properties ◽  
Solvent Casting ◽  
New Materials ◽  
Poly Ethylene Glycol ◽  
Casting Method ◽  
Elongation At Break ◽  
Antibacterial Compound ◽  
Poly Ethylene

A series of new films with antibacterial properties has been obtained by means of solvent casting method. Biodegradable materials including polylactide (PLA), quercetin (Q) acting as an antibacterial compound and polyethylene glycol (PEG) acting as a plasticizer have been used in the process. The effect of quercetin as well as the amount of PEG on the structural, thermal, mechanical and antibacterial properties of the obtained materials has been determined. It was found that an addition of quercetin significantly influences thermal stability. It should be stressed that samples containing the studied flavonoid are characterized by a higher Young modulus and elongation at break than materials consisting only of PLA and PEG. Moreover, the introduction of 1% of quercetin grants antibacterial properties to the new materials. Recorded results showed that the amount of plasticizer did not influence the antibacterial properties; it does, however, cause changes in physicochemical properties of the obtained materials. These results prove that quercetin could be used as an antibacterial compound and simultaneously improve mechanical and thermal properties of polylactide-based films.

Bicomponent multifilament yarns of recycled poly(ethylene terephthalate) and nano-titanium dioxide for antibacterial carpet

2021 ◽  
pp. 152808372110117
Author(s):  
Sommai Pivsa-Art ◽  
Komson Sunyikhan ◽  
Weraporn Pivsa-Art
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Ethylene Terephthalate ◽  
Antibacterial Properties ◽  
Nano Structure ◽  
Elongation At Break ◽  
High Antibacterial Activity ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Multifilament Yarns

Recycled poly(ethylene terephthalate) (RPET) multifilament yarns are used in carpet manufacturing as a way to reduce plastic waste. The conventional RPET carpet is however susceptible to bacterial accumulation. As a result, this research experimentally doped RPET with nano-structure titanium dioxide (nano-TiO2) to produce RPET/nano-TiO2 bicomponent multifilament yarns with antibacterial property. The experimental multifilament yarn structure consisted of two parts: neat RPET core and RPET/nano-TiO2 shell. The nano-TiO2 content in the shell was varied between 1 and 3 wt% and the core/shell (C/S) ratios between 90/10, 70/30, and 50/50 w/w. The effects of C/S ratio and nano-TiO2 content on the mechanical and antibacterial properties of bicomponent multifilament yarns were determined. The experimental results indicated that the C/S ratio had no effect on the tenacity and elongation at break. Meanwhile, the tenacity and elongation at break of bicomponent fibers increased with nano-TiO2 content in the shell. The TiO2-doped RPET bicomponent yarns effectively inhibited the growth of Escherichia coli and Staphylococcus aureus. The 90/10 bicomponent multifilament fiber with 3 wt% TiO2 achieved the highest antibacterial activity. The very high antibacterial activity was attributable to greater deposition of nano-TiO2 particles near and on the shell surface.

Corn Cob Filled Chitosan Biocomposite Films

2013 ◽  
Vol 747 ◽  
pp. 649-652 ◽  
Author(s):  
Chan Ming Yeng ◽  
Husseinsyah Salmah ◽  
Sung Ting Sam
Keyword(s):  
Tensile Properties ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Solvent Casting ◽  
Corn Cob ◽  
Casting Method ◽  
Elongation At Break ◽  
The Poor ◽  
Biocomposite Films ◽  
Scanning Electron

Recently, there has been renews interest in chitosan as materials in producing of biocomposite films. The chitosan (CS)/corn cob (CC) biocomposite films were prepared by solvent casting method. The effect of CC content on tensile properties of CS/CC biocomposite films was studied. The tensile strength and elongation at break of CS/CC biocomposite films decreased as increasing of CC content. However, the increasing of CC content was increased the tensile modulus of CS/CC biocomposite films. Scanning electron microscopy (SEM) was indicated that the deceasing of tensile properties was due to the poor interfacial adhesion between CC filler and CS matrix.

scholarly journals Influence of Tea Tree Essential Oil and Poly(ethylene glycol) on Antibacterial and Physicochemical Properties of Polylactide-Based Films

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4953
Author(s):  
Iwona Tarach ◽  
Ewa Olewnik-Kruszkowska ◽  
Agnieszka Richert ◽  
Magdalena Gierszewska ◽  
Anna Rudawska
Keyword(s):  
Essential Oil ◽  
Ethylene Glycol ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Polymeric Films ◽  
Poly Ethylene Glycol ◽  
Tea Tree ◽  
Resistance To Deformation ◽  
Properties Of Materials ◽  
Poly Ethylene

The aim of the study was to establish the influence of poly(ethylene glycol) (PEG) on the properties of potential biodegradable packaging materials with antibacterial properties, based on polylactide (PLA) and tea tree essential oil (TTO). The obtained polymeric films consisted of PLA, a natural biocide, and tea tree essential oil (5–20 wt. %) was prepared with or without an addition of 5 wt. % PEG. The PLA-based materials have been tested, taking into account their morphology, and their thermal, mechanical and antibacterial properties against Staphylococcus aureus and Escherichia coli. It was established that the introduction of a plasticizer into the PLA–TTO systems leads to an increase in tensile strength, resistance to deformation, as well an increased thermal stability, in comparison to films modified using only TTO. The incorporation of 5 wt. % PEG in the PLA solution containing 5 wt. % TTO allowed us to obtain a material exhibiting a satisfactory antibacterial effect on both groups of representative bacteria. The presented results indicated a beneficial effect of PEG on the antibacterial and functional properties of materials with the addition of TTO.

scholarly journals Development of Nontoxic Biodegradable Polyurethanes Based on Polyhydroxyalkanoate and L-lysine Diisocyanate with Improved Mechanical Properties as New Elastomers Scaffolds

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1927 ◽  
Author(s):  
Cai Wang ◽  
Jiapeng Xie ◽  
Xuan Xiao ◽  
Shaojun Chen ◽  
Yiping Wang
Keyword(s):  
Tissue Regeneration ◽  
Biomedical Applications ◽  
Poly Ethylene Glycol ◽  
In Vitro Degradation ◽  
Elongation At Break ◽  
Molar Ratios ◽  
Soft Tissue Regeneration ◽  
Biodegradable Polyurethane ◽  
Poly Ethylene

A nontoxic and biodegradable polyurethane was prepared, characterized, and evaluated for biomedical applications. Stretchable, biodegradable, and biocompatible polyurethanes (LPH) based on L-lysine diisocyanate (LDI) with poly(ethylene glycol) (PEG) and polyhydroxyalkanoates(PHA) of different molar ratios were synthesized. The chemical and physical characteristics of the LPH films are tunable, enabling the design of mechanically performance, hydrophilic, and biodegradable behavior. The LPH films have a Young’s modulus, tensile strength, and elongation at break in the range of 3.07–25.61 MPa, 1.01–9.49 MPa, and 102–998%, respectively. The LPH films demonstrate different responses to a change of temperature from 4 to 37 °C, with the swelling ratio for the same sample at equilibrium varying from 184% to 151%. In vitro degradation tests show the same LPH film has completely different degradation morphologies in pH of 3, 7.4, and 11 phosphate buffered solution (PBS). In vitro cell tests show feasibility that some of the LPH films are suitable for culturing rat bone marrow stem cells (rBMSCs), for future soft-tissue regeneration. The results demonstrate the feasibility of the LPH scaffolds for many biomedical applications.

Esterification of Rice Straw Cellulose Using Microwave Heating for Plastic Film Preparation

2016 ◽  
Vol 709 ◽  
pp. 86-90
Author(s):  
Phanumas Chaiworn ◽  
Usarat Ratanakamnuan
Keyword(s):  
Microwave Heating ◽  
Rice Straw ◽  
Microwave Power ◽  
Cellulose Ester ◽  
Solvent Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
Cellulose Films ◽  
Film Preparation ◽  
Modified Cellulose

Esterified rice straw cellulose was synthesized by the reaction of cellulose with lauroyl chloride in the presence of toluene medium. Microwave heating was used to accelerate the esterification of cellulose. The optimum condition for esterification was investigated in term of microwave power and reaction time. Solubility of modified cellulose was characterized. The cellulose films were prepared by solvent casting method and mechanical properties of cellulose films were tested. The result shows that the best condition for cellulose esterification was 100 W of microwave power and 15 minute of esterification time. Percentage of weight increase of esterified cellulose at this condition was 143.83 %. Modified cellulose can be dissolved in organic solvent such as toluene, dichloromethane and chloroform. Tensile properties of cellulose films were examined. Tensile strength, Young’s modulus and % elongation at break of rice straw cellulose ester film were 2.33 MPa, 56.63 MPa and 4.21 %, respectively.

Effects of Graphene Nanopletelets on Poly(Lactic Acid)/Poly(Ethylene Glycol) Polymer Nanocomposites

2014 ◽  
Vol 1024 ◽  
pp. 136-139 ◽  
Author(s):  
Buong Woei Chieng ◽  
Ibrahim Nor Azowa ◽  
Wan Yunus Wan Md Zin ◽  
Mohd Zobir Hussein
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Tensile Properties ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Elongation At Break ◽  
Sem Image ◽  
Blending Method ◽  
Poly Ethylene

Graphene nanoplatelets (xGnP) were investigated as a novel nanoreinforcement filler in poly (lactic acid)(PLA)/poly (ethylene glycol)(PEG) blends by melt blending method. The prepared nanocomposites exhibited a significant improvement in tensile properties at a low xGnP loading. The tensile properties demonstrated the addition of 0.3wt% of xGnP led to an increase of up to 32.7%, 69.5% and 21.9% in tensile strength, tensile modulus and elongation at break of the nanocomposites respectively, compared to PLA/PEG blend. The nanocomposites also shows enhanced thermal stability compared with PLA/PEG blend in thermogravimetry analysis (TGA). Scanning electron microscopy (SEM) image of PLA/PEG/0.3wt% xGnP displays good uniformity and more homogenous morphology.

scholarly journals Some electrical properties of PVA:PEG/MnCl2 thin film composites

2019 ◽  
Vol 15 (33) ◽  
pp. 122-130
Author(s):  
Mahdi Hasan Suhail
Keyword(s):  
Electrical Properties ◽  
Electrical Resistance ◽  
Charge Carriers ◽  
Poly Vinyl Alcohol ◽  
Poly Ethylene Glycol ◽  
Casting Method ◽  
Additive Particles ◽  
Poly Ethylene ◽  
Thin Film Composites ◽  
Film Composites

PVA:PEG/MnCl2 composites have been prepared by adding (MnCl2) to the mixture of the poly vinyl alcohol (PVA) and poly ethylene glycol (PEG) with different weight percentages (0, 2, 4, 6, 8 and 10) wt.% by using casting method. The type of charge carriers, concentration (nH) and Hall mobility (μH) have been estimated from Hall measurements and show that the films of all concentration have a negative Hall coefficient. In D.C measurement increase temperature leads to decrease the electrical resistance. The D.C conductivity of the composites increases with the increasing of the concentration of additive particles and temperature. The activation energy decreases for all composites with increasing the concentration of the additive particles. The A.C conductivity increases with increasing of the frequency and the concentration of MnCl2 particles. The A.C electrical properties show that the dielectric constant and dielectric loss of the composites decrease with increasing of the frequency.

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