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1

“In-vitro” Tests on New Biodegradable Metallic Material Based on ZnMgY

Panaghie Catalin, Cimpoesu Nicanor, Benchea Marcelin, Roman Ana-Maria, Manole Vasile, Alexandru Adrian, Cimpoesu Ramona, Cazacu Marius Mihai, Wnuk Izabela, Zegan Georgeta

Archives of Metallurgy and Materials

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2022

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Vol. 67, iss. 2

587--594

EN

Biodegradable materials represent a new class of biocompatible materials with applications in many medical cases where the support must be provided only for a certain period. In this article obtaining of ZnMgY alloy is presented along with some basic characteristic investigations like chemical composition (energy dispersive spectroscopy - EDS), microstructure (optical microscopy - OM and scanning and electron microscopy - SEM), immersion behavior in 10xDPBS (Dulbecco Phosphate Buffer Saline) solution (mass loss and surface degradation), electro-corrosion behavior (potentiostat with a three electrodes cell) and micro-hardness of the experimental alloy compared to cast Zn and ZnMg materials. The results present an improvement of micro-hardness of Zn by alloying with Mg and Y and a modification of corrosion resistance.

2

Investigation of Microstructure, Mechanical and Corrosion Properties of Biodegradable Mg-Ag Alloys

Elen Levent, Turen Yunus, Ahlatci Hayrettin, Sun Yavuz, Unal Mehmet

Archives of Metallurgy and Materials

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2022

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Vol. 67, iss. 3

889-900

EN

In this study, microstructure, mechanical, corrosion and corrosive wear properties of Mg-xAg the as-cast and extruded alloys (x: 1, 3 and 5 wt.%Ag) were investigated. According to the experimental results, as the amount of Ag added in the casting alloys increases, the secondary phases (Mg4Ag, Mg54Ag17) emerging in the structure have become more clarified. Furthermore, it was observed that as the amount of Ag increased, the grain size decreased and thus the mechanical properties of the alloys increased. Similarly, the extrusion process enabled the grains to be refined and the mechanical properties to be increased. As a result of the in vitro tests performed, the Mg-1Ag exhibited very bad corrosion properties compared to other alloys. On the other hand, according to corrosive wear tests results, a high wear rate and friction coefficient were found for Mg-5Ag alloys.

3

Analysis of the Corrosion Rate of FeMn-Si Biodegradable Material

Roman Ana-Maria, Chelariu Romeu, Cimpoesu Ramona, Stirbu Ioan, Ionita Iulian, Cazacu Marius Mihai, Prisecariu Bogdan Anton, Cimpoesu Nicanor, Pietrusiewicz Paweł, Sodor Alina

Archives of Metallurgy and Materials

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2022

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Vol. 67, iss. 4

1243--1250

EN

The Fe-based alloy with manganese led to the appearance of new austenitic alloys, with the antiferromagnetic property pursued, resulting in compatibility with the magnetic field as that of magnetic resonance imaging. The corrosion resistance behavior of the biodegradable Fe-Mn-Si alloy was analyzed in a thermostatic chamber at 37±1°C for 24, 48 and 72 hours by immersing in Ringer solution. Also, the cast and laminated samples were subjected to electro-corrosion tests using a potentiostat equipment. Linear and cyclic potentiometry is presented for characterize the corrosion behavior of the experimental samples in electrolyte. Due to the interaction between the alloy and the liquid medium a change in the solution pH was observed. Structure analysis and chemical composition details of the surfaces were obtained using electron scanning microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS).

4

Paper Components Effect on Hydraulic Characteristics of Biodegradable Municipal Solid Waste

Hadinata Febrian, Susanti Betty, Soraya Muthia, Silaban Aprina Sriwita

Journal of Ecological Engineering

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2021

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Vol. 22, nr 2

272--278

EN

Indonesian municipal solid waste (MSW) is dominated by biodegradable MSW (organic and paper). Due to the degradation process, the physical and hydraulic characteristics of these components can change. It is important to study the physical and hydraulic characteristics of MSW, because landslides occurred in several landfills in Indonesia after heavy rains. Field observations showed that landslides occur due to reduced paper components in the landfill (due to high recycling activities), and cause high percolation of water into the landfill. In the research, 38 samples consisting of two variants of MSW samples (organic and 80% organic + 20% paper), were prepared under the conditions of optimum moisture content. The organic sample of MSW is leaf, while the paper sample of MSW is newspaper, which were shredded to a diameter of about 1 cm. The tests of moisture content, bulk density (in the mould of permeameter), particle size distribution, and permeability were carried out on both sample variants for 90 days, with a test frequency of once in 5 days. The results showed that there was an increase in the moisture content and density, and a decrease in particle size and permeability in both variants of MSW sample. Organic MSW + paper has lower permeability and higher density than organic MSW. This requires further study, because a high paper recycling ratio can lead to a change in the landfill characteristics.

5

Poly(sebacic anhydride) microparticles loaded with curcumin for pulmonary purposes

Kwiecień Konrad, Reczyńska-Kolman Katarzyna, Niewolik Daria, Jaszcz Katarzyna, Pamuła Elżbieta

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

43

6

Physical properties of PLGA biodegradable polymer coatings containing hydroxyapatite on Ti6Al7Nb substrate

Goldsztajn Karolina, Szewczenko Janusz, Jaworska Joanna, Jelonek Katarzyna, Basiaga Marcin

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

31

7

Influence of crimping process on radial strength of vascular stent made of various bioresorbable polymers

Sobota Michał, Stojko Mateusz, Włodarczyk Jakub, Jelonek Katarzyna, Jaworska Joanna, Musiał-Kulik Monika, Pastusiak Małgorzata, Dobrzyński Piotr, Kasperczyk Janusz

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

39

8

Biodegradable Fe-based materials – a critical review

Gasior Gabriela, Radtke Aleksandra

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

60

9

Coloration of poly(lactic acid) based textiles – a review

Baig Gulzar Ahmad

Polimery

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2020

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T. 65, nr 6

415--429

EN

Polyester fibers include industrially important cellulose acetate, poly(ethylene terephthalate) (PET), poly(1,4-cyclohexane dimethylene terephthalate) (PCDT), poly(trimethylene terephthalate) (PTT), poly(lactic acid) (PLA) fibers; however, it is the last one that has been considered to be a “green“ one. PLA is an eco-friendly polyester material that is obtained from renewable resources. The effect of chromophoregens and substituents on exhaustion, colorimetric and fastness properties of PLA with newly developed disperse dyes has been outlined. The differences in colorimetric properties, wavelength-shift and deep-dyeing behavior of PLA as compared to PET have been explained. Use of non-aqueous dyeing media such a super critical carbon dioxide (sc-CO2 ), various organic solvents and carriers have been discussed.

PL

Ważne dla przemysłu włókna poliestrowe bazują na: octanie celulozy, poli(tereftalanie etylenu) (PET), poli(tereftalanie 1,4-cykloheksanodimetylenu) (PCDT), poli(tereftalanie trimetylenu) (PTT) i, ostatnio uznanym za „zielony”, poli(kwasie mlekowym) (PLA). PLA to ekologiczny materiał poliestrowy pozyskiwany z zasobów odnawialnych. W artykule omówiono wpływ chromoforegenów i podstawników obecnych w cząsteczkach nowo opracowanych barwników dyspersyjnych na właściwości zmęczeniowe, kolorymetryczne i trwałość barwionych włókien PLA. Wyjaśniono różnice we właściwościach kolorymetrycznych, przesunięciu długości fali i głębokości zabarwienia PLA i PET. Przedstawiono zastosowanie w procesie barwienia włókien PLA niewodnych środków barwiących, takich jak: nadkrytyczny ditlenek węgla (sc-CO2 ), różne rozpuszczalniki organiczne i nośniki.

10

Pilot studies of biodegradable iron-based 3D systems – for the needs of modern cardiology

Radtke Aleksandra, Szczepański Jonasz, Piszczek Piotr

Engineering of Biomaterials

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2020

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Vol. 23, no. 158 spec. iss.

26

11

Investigation of Biodegradation Speed and Biodegradability of Polyethylene and Manihot Esculenta Starch Blends

Abioye Abiodun A., Obuekwe Chukwunonso, Fasanmi Oluwatosin, Oluwadare Oreofe, Abioye Oluwabunmi P., Afolalu Sunday A., Akinlabi Stephen A., Bolu Christian A.

Journal of Ecological Engineering

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2019

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Vol. 20, nr 2

65--72

EN

Over 350 million tons of conventional plastics are currently produced from petroleum per year and this amount is expected to rise exponentially in the near future. Proper disposal of these products has caused a great problem for the waste management industry and as a result, there is a significant negative impact on the environment. As a matter of fact, in order to reduce the environmental impact of plastics, some products obtained from agriculture (like starch) are used as polymer blend with synthetic plastics. This study shows that Manihot esculenta can be blended with polyethylene to form a partially degradable polymer. The processing conditions and sample formulations are shown to significantly affect the structure of the polymer which has a concomitant effect upon the degradation ratio as well as the degradation rate. Six samples were produced by varying composition of the blend between Low-density Polyethylene and Manihot esculenta using glycerol and water as plasticiser. These samples were buried in soil and the degradation ratios and rates were studied within a period of 28 days. The results showed that these produced biopolymers are environmentally compatible and bio-degradable. The rate of biodegradation in soil of these biopolymer samples varied largely. The polymer blend with 80% LDPE (20 CaS) by weight had the most regular weight loss over the period of the study. Under the conditions the study was carried out, polymer blend 20 CaS also had the steadiest rate of degradation. Hence, 80% LDPE (wt.%) blended with Manihot esculenta starch is the optimal ratio with regard to the degradability of biopolymer in sandy-loam soil.

12

Environmental Impact on Biodegradation Speed and Biodegradability of Polyethylene and Zea Mays Starch Blends

Abioye Abiodun A., Oluwadare Oreofe P., Abioye Oluwabunmi P., Obuekwe Chukwunonso C., Afolalu Adeniran S., Atanda Pethuel O., Fajobi Muyiwa A.

Journal of Ecological Engineering

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2019

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Vol. 20, nr 9

277--284

EN

Several studies projected that by year 2025, 4.3 billion urban residents will be generating about 2.2 billion tonnes of municipal solid waste per year, over 10% of which will be plastics. The landfills in Nigeria are uncontrolled and do not conform to the international standards of similar operations elsewhere in the world; this makes the disposal of synthetic polymers in the soil even more hazardous. Due to the availability and relative inexpensiveness of Zea mays in Nigeria, this study explores the use of this natural polymer, blended with low density polyethylene (LDPE) as an alternative to synthetic plastics. Biodegradability of the biopolymer blend was observed while buried in loamy sand soil with properties similar to the soil found in the general area of the study. The results showed that a polymer blend with 50% LDPE (50 CoS) by weight had the most uniform weight loss over the period of the study. Under the soil conditions given in the study, 50 CoS also had the steadiest rate of degradation. Hence 50% LDPE (wt.%) blended with Zea mays starch is the optimal ratio with regard to the degradability of biopolymer in loamy sand soil Ota, Ogun State, Nigeria.

13

Near-field electrospinning of polydioxanone tissue regeneration templates

King William E. III, Gilespie Yvonne, Keaton Gilbert, Bowlin Gary L.

Engineering of Biomaterials

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2019

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Vol. 22, no. 153 spec. iss.

16

14

Rodzaj płynu roboczego w obróbce skrawaniem a efekty obróbki

Kowalczyk J., Madej M.

Obróbka Metalu

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2018

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nr 4

41--45

PL

W artykule przedstawiono rezultaty badań dotyczących cech użytkowych nowej biodegradowalnej cieczy chłodzącosmarującej. Jej cechy porównano z cieczą tradycyjną. Porównano także wpływ obydwóch cieczy na topografię obrobionych powierzchni, a uzyskane wyniki porównano z efektami obróbki na sucho. Stwierdzono, że nowa ekologiczna ciecz chłodząco-smarująca spełnia lepiej niż ciecz tradycyjna oczekiwane cechy. Topografia obrobionych powierzchni także pozwala na efektywną realizację funkcji oczekiwanych przez węzeł tribologiczny.

15

Evaluation of various antibacterial, biodegradable polymeric coatings developed on Ti6Al7Nb surface

Jaworska J., Jelonek K., Jaworska M., Kajzer W., Szewczenko J., Pastusiak M., Kasperczyk J.

Engineering of Biomaterials

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2018

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Vol. 21, no. 148

31

16

Kompozyty na osnowie biodegradowalnego kopoliestru modyfikowane dwutlenkiem tytanu, cząstkami celulozy oraz związkami miedzi na opatrunki elastyczne w weterynarii

Mazur K., Kuciel S.

Przetwórstwo Tworzyw

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2017

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T. 23, Nr 5 (179)

390--398

PL

W pracy dokonano oceny możliwości wykorzystania biodegradownych kopoliestrów termoplastycznych na opatrunki stosowane w weterynarii. Dla zrealizowania badań fizykomechanicznych przygotowano kompozycje na osnowie biodegradowalnego, termoplastycznego kopoliestru termoplastycznego firmy NaturePlast, modyfikowanego związkami miedzi oraz dwutlenkiem tytanu z dodatkiem mikrocelulozy. Metodą wtryskiwania wytworzono następujące kompozyty: kopoliester z 15% domieszką miedzi (TPU-M), kopoliester z 15% domieszką bieli tytanowej (TPU-B), kopoliester z 15% domieszką celulozy (TPU-C), kopoliester z 5% domieszką miedzi, 5% domieszką bieli tytanowej oraz 5% domieszką celulozy (TPU-Z). Na otrzymanych próbkach wykonane zostały badania zmian podstawowych właściwości wytrzymałościowych na kolejnych etapach degradacji hydrolitycznej oraz cech mikrostruktury dla oceny homogenizacji wszystkich trzech składników. W podsumowaniu przedstawiono wnioski z badań oraz podano przykład możliwości wykorzystania zaproponowanej kompozycji na opatrunek wykonany z biodegradowalnego kopoliestru.

EN

The paper evaluates the possibilities of using biodegradable thermoplastic copolyesters for dressings used in veterinary medicine. In preparation for the physico-mechanical research, compositions based on the biodegradable, thermoplastic copolyester manufactured by NaturePlast, modified with copper compounds and titanium dioxide with the addition of microcellulose were prepared. The following compositions were applied using injection method: copolyester with 15% copper admixture TPU-M, copolyester with 15% titanium white admixture TPU-B, copolyester with 15% cellulosem admixture TPU-C, 5% copper admixture copolyester, 5% titanium white admixture and 5% cellulose admixture (TPU-Z). On the samples obtained, a research on changes in basic strength properties was carried out at subsequent stages of hydrolytic degradation and microstructure characteristics for the homogenization of all three components. The conclusions of the study were summarized in the following paper and an example of the possibility of using an exemplary composition for a dressing made from biodegradable copolyester was suggested.

17

New Method for Preparation of Biodegradable Medical Materials Characterised by Highly Developed Porous Structures

Kowalska S, Krucińska I, Komisarczyk A, Żywicka B

Fibres & Textiles in Eastern Europe

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2014

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Vol. 22, no. 4 (106)

122--130

EN

This study addresses the preparation of biodegradable and highly porous materials with the chemical purity required for medical materials. The solution method for producing porous structures with table salt was modified through the application of plasticisers in the technological process. In this paper the term medical materials includes dressing and implantable materials as well as scaffolds for tissue culture. A new method is proposed using polymers such as poly(D,L-lactide) and dibutyrylchitin to produce porous structures with enhanced absorption properties.

PL

Przedmiotem prezentowanych badań było wytworzenie biodegradowalnych wysoko-porowatych pianek o czystości chemicznej charakterystycznej dla materiałów medycznych. Zaproponowano modyfikację metody roztworowej produkcji pianek przy użyciu soli kuchennej poprzez dodatkowe zastosowanie plastyfikatorów w procesie technologicznym. Zaproponowana metoda dotyczy wytwarzania wyrobów z poli (D,L – laktydu) i polimerów bioaktywnych, np. dibutyrylochityny a celem jej opracowania było wytworzenie materiałów o podwyższonych właściwościach sorpcyjnych. Dodatek NaCl w ilości nie mniejszej niż 100% oraz gliceryny w ilości 5% w stosunku do masy roztworów polimerowych z 10%PLA4060D, 10%DBC lub 5%PLA/DBC powoduje wzrost adsorpcji wody i soli fizjologicznej o ponad 10 g/g w stosunku do pianek formowanych z użyciem wyłącznie soli. W przypadku pianek z mieszaniny PLA/DBC zawartość soli musi być większa niż 100%, w przeciwnym wypadku następuje rozwarstwienie pianek. Wprowadzenie do układu 50%wt dibutyrylochityny skutkuje obniżeniem pH do poziomu 6,36, co jest korzystne z punktu widzenia biozgodności materiałów i sprzyja tworzeniu korzystniejszych warunków dla procesu gojenia się rany.

18

Degradation Characteristics of SPF/SPS Biocomposites

Sahari J, Sapuan S. M., Zainudin E S, Maleque M. A.

Fibres & Textiles in Eastern Europe

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2014

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Vol. 22, no. 5 (107)

96—98

EN

In this work, sugar palm fibres (SPF) were used as a biodegradable reinforcement. SPF were incorporated into sugar palm starch (SPS) plasticised with glycerol using the compression molding process. Then the SPS and SPF/SPS biocomposites were submitted to biodegradation by means of soil burial experiments. The environmental effect on the SPS and SPF/SPS biocomposites were a loss in tensile strength of 78.09% and 53.67%, respectively, at the end of 72 hrs of the weathering testing period. The biodegradation test shows that SPS degrades very quickly and loses 63.58% of its weight at the end of 72 hrs compared to the SPF/SPS biocomposites.

PL

Dla otrzymania biokompozytów zastosowano włókna z palmy cukrowej jako biodegradowalne wzmocnienie oraz matrycę ze skrobi tejże palmy. Plastyfikację przeprowadzono wykorzystując glicerynę w procesie wytłaczania. Gotowe biokompozyty były poddane biodegradacji przez umieszczenie w odpowiedniej glebie. Po 72 godzinach stwierdzono ubytek masy rzędu 78% podczas gdy w warunkach atmosferycznych stwierdzono ubytek masy około 54%. Stwierdzono również, że sama skrobia degraduje bardzo szybko i traci około 63% masy pod koniec 72- godzinnego okresu starzenia w warunkach atmosferycznych.

19

Fabrication of a polymer-based biodegradable stent using a CO2 laser

Stępak B.

Archives of Civil and Mechanical Engineering

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2014

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Vol. 14, no. 2

317--326

EN

This paper deals with CO2 laser machining of biodegradable polymers. We investigate the influence of laser parameters on the quality and geometry of cuts made in poly(l-lactide) and poly(l-lactide-co-glycolide). Because of the thermal character of material removal, liquid phase occurs and heat propagates into the material, changing its properties near the cutting zone. For this reason, the mechanical properties of laser cut samples were examined. Oar-shaped samples cut with a CO2 laser were compared with injection moulded samples and also with those manufactured using a KrF excimer laser. Samples with dimensions comparable to those of stent struts were examined in a uniaxial quasi-static tensile test. The influence of laser power and scanning speed on the geometry of cuts was investigated. Narrow cuts (120 µm) were made in 250 µm-thick polymer sheets. A tubular stent based on poly(l-lactide) was designed and then fabricated using a CO2 laser. We noted that this method allows achieving stent struts that are 300 µm wide; however, for such narrow elements the influence of the heat-affected zone can be critical. We believe that this technique has a potential to become an alternative, cost-efficient method of manufacturing biodegradable stents.

20

Biodegradowalne kompozyty PLA do zastosowań na wyroby elektrotechniczne

Bursa J., Tartakowski Z., Kosyl M.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 1a

131--133

PL

Tworzywa polimerowe są najbardziej rozpowszechnionymi materiałami stosowanymi na wyroby elektrotechniczne. Wzrastające wymagania w zakresie ochrony środowiska jak i późniejszy obowiązek utylizacji wyrobów stwarzają konieczność doboru materiałów z uwzględnieniem ich recyklingu. Od dłuższego czasu zarówno dla przemysłu i nauki priorytetem stały się prace w zakresie nowych materiałów o korzystnych właściwościach, których produkcja i utylizacja minimalizuje zagrożenie szkodliwego oddziaływania na środowisko. Prezentowana praca dotyczy oceny wybranych właściwości fizycznych, mechanicznych i elektrycznych PLA i kompozytów na osnowie PLA.

EN

Polymeric materials are the basic materials used in electrotechnical products. Increasing demands on the environment and the existing EU directive on recycling of electrotechnical products make it necessary to their rational utilization. Therefore more and more problematic materials from disposal are replaced with others, where the process of recycling is easier. Such materials are biodegradable plastics such as PLA (polylactide). The presented research work concerns the evaluation of selected physical, mechanical and electrical materials made of PLA and polymer composites with PLA matrix.