Development of a Biosensor with Electrically Conductive and Biodegradable Composite by Combinatory Use of Silver Nanoparticles, Novel Activated Biochar, and Polylactic Acid

The purpose of this research is to develop a new type of environmentally friendly container which has thermostatic effect and is biodegradable. This study is based on polylactic acid (PLA) and maleic anhydride grafted polybutylene succinate (MAPBS). Subsequently, the diatomite which adsorbed polyethylene glycol (PEG) was added to prepare a thermostatic biodegradable composite. The addition of MAPBS is to improve the compatibility between PLA and diatomite. In addition, the thermostatic effect, tensile strength, thermal deformation temperature and impact strength of the composite were investigated.

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Evaluation of Nanocomposite Made of Polylactic Acid and Nanocellulose from Carrot Pomace Modified with Silver Nanoparticles

Polymers ◽

10.3390/polym12040812 ◽

2020 ◽

Vol 12 (4) ◽

pp. 812 ◽

Cited By ~ 1

Author(s):

Monika Szymańska-Chargot ◽

Monika Chylińska ◽

Piotr M. Pieczywek ◽

Anna Walkiewicz ◽

Giorgia Pertile ◽

...

Keyword(s):

Escherichia Coli ◽

Mechanical Properties ◽

Carbon Dioxide ◽

Silver Nanoparticles ◽

Polylactic Acid ◽

Cellulose Nanofibrils ◽

Antibacterial Properties ◽

Young Modulus ◽

Transmission Rates ◽

Degradation Temperature

In this research, it was proposed to use carrot cellulose nanofibrils (CCNF) isolated from carrot pomace modified with silver nanoparticles (AgNPs) as a filler of polylactic acid (PLA) composites matrix. The new procedure was based on two steps: first, the preparation of nanocellulose modified with metal nanoparticles, and then the combination with PLA. Two concentrations—0.25 mM and 2 mM—of AgNO3 were used to modify CCNF. Then, PLA was mixed with the filler (CCNF/AgNPs) in two proportions 99:1 and 96:4. The influence of CCNF/AgNPs on mechanical, hydrophilic, thermal, and antibacterial properties of obtained nanocomposites was evaluated. The greatest improvement of mechanical properties was observed for composite containing CCNF with 2 mM of AgNPs, which obtained the lowest Young modulus and highest strain at break. The degradation temperature was lower for PLA with CCNF/AgNPs, but crystallization temperature wasn’t influenced. The addition of CCNF/AgNPs also increased hydrophilicity. The transmission rates of oxygen, nitrogen, and carbon dioxide also increased after the addition of CCNF/AgNPs to PLA. The antibacterial function against Escherichia coli and Bacillus cereus was obtained after the addition of AgNPs but only at the contact surface with the material made, suggesting the lack of migration of nanoparticles from the composite.

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Study of the Effects and Interaction of Operational Parameters on the Fabrication of Silver Nanoparticles (AgNPs)-Loaded Chitosan-Polylactic Acid-Based Films Using Full Factorial Design

Proceedings of the International Conference on Science, Technology and Social Sciences (ICSTSS) 2012 ◽

10.1007/978-981-287-077-3_90 ◽

2014 ◽

pp. 757-765

Author(s):

S. Aznizan ◽

M. N. Abu Seman ◽

C. K. M. Faizal

Keyword(s):

Silver Nanoparticles ◽

Factorial Design ◽

Polylactic Acid ◽

Full Factorial Design ◽

Operational Parameters ◽

Full Factorial

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Non-woven Membranes Electrospun from Polylactic Acid Incorporating Silver Nanoparticles as Biocide

MRS Proceedings ◽

10.1557/opl.2012.285 ◽

2012 ◽

Vol 1376 ◽

Cited By ~ 5

Author(s):

Haydee Vargas-Villagran ◽

Elvia Teran-Salgado ◽

Maraolina Dominguez-Diaz ◽

Osvaldo Flores ◽

Bernardo Campillo ◽

...

Keyword(s):

Contact Angle ◽

Silver Nanoparticles ◽

Polylactic Acid ◽

Chloroform Solution ◽

Average Diameter ◽

Electrospinning Process ◽

Water Contact ◽

X Ray Scattering ◽

Angle Measurements ◽

Contact Angle Measurements

ABSTRACTIn this research, we describe the electrospinning processing of polylactic acid (PLA) and the influence of silver nanoparticles on the morphology and microstructure of produced non woven membranes thus produced. The PLA was electrospun from a chloroform solution and a filamentary and granular morphology was obtained, the filaments having an average diameter of 1.25 μm, When silver nanoparticles (of ca. 12 nm size) were incorporated, the filaments diameter was reduced to an average of 0.65 μm, and the density of beads was also reduced. The membranes were rather amorphous, as revealed by X-ray scattering, presumably due to the quenching process associated with the electrospinning process. Water contact angle measurements showed that silver nanoparticles induced significant hidrophobicity in the membranes as neat PLA membrane had a contact angle of 54° and PLA/Ag membrane exhibited an angle of 115°.

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Antimicrobial Activity of Allyl Isothiocyanate Used To Coat Biodegradable Composite Films as Affected by Storage and Handling Conditions†

Journal of Food Protection ◽

10.4315/0362-028x.jfp-12-234 ◽

2012 ◽

Vol 75 (12) ◽

pp. 2234-2237 ◽

Cited By ~ 8

Author(s):

WEILI LI ◽

LINSHU LIU ◽

TONY Z. JIN

Keyword(s):

Antimicrobial Activity ◽

Polylactic Acid ◽

Food Packaging ◽

Storage Time ◽

Storage Temperature ◽

Composite Films ◽

Antimicrobial Properties ◽

Allyl Isothiocyanate ◽

Microbial Reduction ◽

Biodegradable Composite

We evaluated the effects of storage and handling conditions on the antimicrobial activity of biodegradable composite films (polylactic acid and sugar beet pulp) coated with allyl isothiocyanate (AIT). Polylactic acid and chitosan were incorporated with AIT and used to coat one side of the film. The films were subjected to different storage conditions (storage time, storage temperature, and packed or unpacked) and handling conditions (washing, abrasion, and air blowing), and the antimicrobial activity of the films against Salmonella Stanley in tryptic soy broth was determined. The films (8.16 μl of AIT per cm2 of surface area) significantly (P < 0.05) inhibited the growth of Salmonella during 24 h of incubation at 22°C, while the populations of Salmonella in controls increased from ca. 4 to over 8 log CFU/ml, indicating a minimum inactivation of 4 log CFU/ml on films in comparison to the growth on controls. Statistical analyses indicated that storage time, storage temperature, and surface abrasion affected the antimicrobial activity of the films significantly (P < 0.05). However, the differences in microbial reduction between those conditions were less than 0.5 log cycle. The results suggest that the films' antimicrobial properties are stable under practical storage and handling conditions and that these antimicrobial films have potential applications in food packaging.

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Facile preparation of highly electrically conductive films of silver nanoparticles finely dispersed in polyisobutylene-b-poly(oxyethylene)-b-polyisobutylene triblock copolymers and graphene oxide hybrid surfactants

RSC Advances ◽

10.1039/c5ra21696f ◽

2015 ◽

Vol 5 (124) ◽

pp. 102462-102468 ◽

Cited By ~ 4

Author(s):

Chih-Wei Chiu ◽

Gang-Bo Ou

Keyword(s):

Electrical Conductivity ◽

Silver Nanoparticles ◽

Graphene Oxide ◽

Triblock Copolymers ◽

Film Surface ◽

High Electrical Conductivity ◽

Electrically Conductive ◽

Conductive Films ◽

Heat Treated ◽

Facile Preparation

The melted morphologies revealed that the AgNPs possessed mobility, and melted on the film surface, giving a high electrical conductivity of 5.2 × 10−2 Ω sq−1 when heat-treated at 350 °C.

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