Temat: porous polymer - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Pianki polimerowe - mechanizm spieniania, klasyfikacja i wybrane technologie przetwórstwa
Polymer foams - foaming mechanism, classification and selected manufacturing technologies
Autorzy:: Sienkiewicz, K.
Arciszewski, P.
Powiązania:: https://bibliotekanauki.pl/articles/946257.pdf
Data publikacji:: 2018
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:: pianki polimerowe
spienianie polimerów
materiały porowate
polymer foam
polymer foaming
porous materials
Opis:: Pomimo szerokiego zastosowania spienionych materiałów polimerowych i ich obecności w prawie każdej dziedzinie życia, fundamentalna wiedza na ich temat nie jest tak powszechna, a teoretyczne zagadnienia związane z piankami polimerowymi rzadko poruszane są w polskiej literaturze naukowej. W związku z tym, w artykule opisano etapy procesu spieniania, klasyfikację oraz dokonano przeglądu literatury dotyczącej wybranych technologii przetwórstwa pianek polimerowych.
Despite the wide use of foamed polymer materials and their presence in almost every area of life, fundamental knowledge about them is not so common, and theoretical subjects related to polymer foams are rarely raised in Polish scientific literature. Therefore, the article describes the stages of the foaming process, classification and literature review concerning selected technologies of polymer foam processing.
Źródło:: Przetwórstwo Tworzyw; 2018, T. 24, Nr 5 (185), 5 (185); 23-29
1429-0472
Pojawia się w:: Przetwórstwo Tworzyw
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effective removal of odors from air with polymer nonwoven structures doped by porous materials to use in respiratory protective devices
Autorzy:: Brochocka, Agnieszka
Nowak, Aleksandra
Panek, Rafał
Kozikowski, Paweł
Franus, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/1845379.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: activated carbon
zeolites
porous materials
polymer nonwoven structures
mesoporous silica materials
aplication
Opis:: Filtering Respiratory Protective Devices (FRPD) is not typically evaluated for exposure to volatile compounds, even though they significantly affect their protective performance. Such compounds are released into the atmosphere by industrial processes and pose serious health risks in people inhaling them. The adsorbent materials currently used to prevent those risks include activated carbon (AC). Zeolites and mesoporous silica materials (MCM) are very popular among the sorption materials. Due to their physical and chemical properties, they are able to adsorb significant amounts of volatile compounds from air. The melt-blown technology was used to produce filtering nonwovens with modifiers. As a result, polymer nonwoven structures with modifiers in the form of AC, zeolite (NaP1 type), molecular sieves (SM, SM 4Å) and mesoporous silica materials (MCM-41) were produced. The use of ACs (AC1 from Zgoda and AC2 from Pleisch) and their mixtures with others modifiers allowed to obtain satisfactory sorption, protective and utility properties. The longest breakthrough time against cyclohexane (approx. 53 min) was afforded by a variant containing AC, against ammonia (approx. 12 min) for the variant with AC2 and a mixture of AC2 and MCM-41. In the case of acetone vapor satisfactory breakthrough times were found for the variants with AC2 and AC1+SM (~20–25 min.). The present work deals with scientific research to improve workers’ and society’s health and safety by pursuing a better working life, and creating a safe social environment.
Źródło:: Archives of Environmental Protection; 2021, 47, 2; 3-19
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Sieci metalo-organiczne jako multifunkcjonalne materiały przyszłości : mechanochemiczne podejście do syntezy
Metal-organic frameworks as multifunctional materials of the future : mechanochemical approach to synthesis
Autorzy:: Jędrzejowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/171620.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: sieć metalo-organiczna
mechanochemia
mechanosynteza
polimery koordynacyjne
chemia koordynacyjna
materiały porowate
materiały multifunkcjonalne
metal-organic frameworks
mechanochemistry
mechanosynthesis
coordination polymer
coordination chemistry
porous materials
multifunctional materials
Opis:: Metal-organic frameworks (MOFs) are a relatively new class of advanced inorganic-organic materials. Due to their modular structures and possible incorporation of various properties, that materials find more and more applications in many fields of science and industry. MOFs are coordination polymers, i.e. compounds with coordination bonds propagating infinitely in at least one dimension. Their characteristic feature is the presence of potential free spaces, i.e. pores. The free spaces often appear after proper activation, e.g. thermal activation. Other common properties of MOFs include for instance large specific surface areas and pore volumes, modifiable size and chemical environment of the pores, and network flexibility. All these properties result in the use of MOFs in e.g. selective sorption, separation or storage of gases, heterogeneous catalysis, design and fabrication of sensors, etc. During more than twenty years of the history of MOFs, many methods of their synthesis have been developed, including the most popular in solution at elevated temperatures (e.g. solvothermal method). Nevertheless, the activity of pro-ecological environments and the requirements set by international organizations encourage scientists to create new methods of synthesis, which, according to the guidelines presented by the 12 principles of green chemistry, will be safer, less aggressive, less toxic and less energy-consuming. One of the answers to meet these requirements is the use of mechanosynthesis. Mechanochemical synthesis relies on the supply of energy to a system by mechanical force, by grinding or milling. By combining or transforming solids in this way, the presence of a solvent, which is most often the main source of contamination and waste, can be minimised or completely excluded. Mechanical force is typically used for purposes other than MOF synthesis, e. g. catalyst grinding. Nevertheless, the use of mechanical force in synthesis is becoming more and more popular. The most important advantages of this approach, apart from its environmental impact, are very high efficiency (usually close to 100%) and drastically reduced reaction time. Of course, there are examples where these advantages are not observed. In such cases, mechanosynthetic modifications are introduced, such as e.g. addition of small amount of liquid (Liquid-Assisted Grinding) and/or a small addition of simple inorganic salt (Ion- and Liquid-Assisted Grinding). Furthermore, new instrument setups are being developed to monitor reaction mixtures in situ during mechanosynthesis, e.g. by use of such techniques as powder X-ray diffraction and Raman spectroscopy. This enables valuable insights into mechanisms and allows for mechanosynthesis optimization.
Źródło:: Wiadomości Chemiczne; 2018, 72, 9-10; 645-666
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

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