Antimicrobial and Antiviral Respiratory Materials

Еннан, А. А.; Khoma, R. E.; Dlubovskii, R. M.; Abramova, N. N.; Vodzinskiy, S. V.

doi:10.18524/2304-0947.2020.3(75).211712

Cited by 2 publications

(3 citation statements)

References 29 publications

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“…The filtering respirator of the "Shakhtar" model is characterized by improved performance properties and an extended period of protective action compared to other filtering respirators used in coal mines (Knobloch et al, 2023). It contains an elastomeric half-mask made of airtight material, which is equipped with two exhalation valves located on both sides of the half-mask, a filter cartridge equipped with an additional pleated filter located in front of the main one, as well as an obturator and a mounting set (Ennan et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Increasing the Insulation Properties of Filter Respirators to Protect Miners’ Respiratory Organs From Dust

Cheberiachko,

Deryugin

et al. 2023

MGPB

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To increase the insulating properties of elastomeric half-masks, it is suggested to perforate the obturator in the area of the nasal bridge, chin and cheeks, which allows for adjustment in its size, thus preventing the occurrence of wrinkles on the user’s face in the areas which are the individual features of a particular user’s face. Three versions of the perforated filter respirator obturator have been proposed: in the first, the holes are made along the entire perimeter of the obturator; in the second, the holes are only in the area of the cheeks and nasal bridge; in the third, incisions with a diameter of 5 mm are made in the area of the nasal bridge and cheeks. The result of modelling a set of alternative solutions taking into account the coefficient of protection of filter respirator half-masks, the distribution of compressive forces, which are determined in the environment of the packages “ANSYS” and “Solid works”, has been obtained on the basis of main indicators of the proposed models. To make a decision on choosing the best model, the mass of the elastomeric half mask, its dimensions and the complexity of the design were additionally considered. On the basis of expert evaluation, according to the described procedure for determining the utility function of the factors from their values, it has been defined that the second model of the half-mask is characterized by the best parameters. Conducted laboratory studies to determine the aerosol absorption coefficient by the obturation line showed the lowest indicator in the second option.

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Section: Resultsmentioning

confidence: 99%

Increasing the Insulation Properties of Filter Respirators to Protect Miners’ Respiratory Organs From Dust

Cheberiachko,

Deryugin

et al. 2023

MGPB

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“…For the production of GFC, with which light respirators are equipped, the PCIEHP (Odesa) developed impregnated fibrous chemisorbents of basic gases with visual indication of the moment of dynamic absorption capacity "response" (IFCS-І) [8,9], obtained by impregnating fibrous carriers with aqueous solutions of polybasic hydroxy acids, to which acid-base indicators (Ind) were added. The dynamic absorption capacity "response" of such chemisorbents during the absorption of the basic gas (ammonia) can be visually determined by the change in the color of the GFC on the side facing the face during the breakthrough of the sorbate.…”

Section: Phisical Chemistrymentioning

confidence: 99%

“…Therefore, the purpose of this work is to establish the features of the colorimetric behavior of IFCS-I during "response" by NH 3 , which will become a theoretical basis for the development of active ESLIs. In view of this, the paper presents data on the colorimetric evaluation of IFCS-Is developed by us earlier based on oxyethylenediphosphonic acid (IF-CS-OEDPA-I) [8] and citric acid (IFCS-CA-I) [9], as well as of a new IFCS-MA-I based on malic acid (MA).…”

Section: Phisical Chemistrymentioning

confidence: 99%

Impregnated Fibrous Chemisorbents for the Colorimetric Detection of Ammonia

2023

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The paper presents research results on the colorimetric behavior of impregnated fibrous chemisorbents (IFCS) of basic gases with visual identification of the dynamic absorption capacity “response” moment (IFCS-I) during the absorption of ammonia. Chemisorbents were obtained by impregnation of fibrous carriers with polybasic hydroxyl acid aqueous solutions with adding acid-base indicators (Ind). IFCS-I based on oxyethylenediphosphonic (IFCS-OEDPA-I), citric (IFCS-CA-I), and malic (IFCS-MA-I) acids were used. Azolithine (Az), lakmoid (LA), methyl orange (MO), methyl red (MR), Tropeolin OOO (TrOOO), Congo red (CoR), bromocresol green (BCG), broxylenol blue (BXB), bromophenol blue (BPB), bromophenol red (BPR), thymol blue (TB), xylenol orange (XO), and phenol red (PR) were used as acid-base indicators. The specificity of the changes in the colorimetric functions of IFCS-I during the absorption of NH3 by them was revealed. It was found that the color of the initial IFCS-I samples significantly depended not only on the structure of Ind, but also on the nature of the polybasic hydroxy acid being part of them. The colors of the samples based only on OEDPA (Ind = CoR, BCG, BPB), CA (Ind = CoR, TrOOO, BCG, BPB, BPR, XO) and some MA (TrOOO, BCG) are similar to the colors of aqueous solutions of Brönsted acids. The difference in the colors of the other samples from the colors of strong acid aqueous solutions with the same Ind is apparently due to specific interactions between hydroxy acid anions and neutral dye forms. During “response” to NH3 only some IFCS-I samples based on OEDPA (Ind: MO, TrOOO, Az and BPR), CA (Ind: CoR, MR, MO, TrOOO, BXB, BPR, TB, PR) and MA (Ind: LA, MR, MO, Az, BXB, XO, TB, PR) are discolored in contrast to the behavior of SO2 indicator chemisorbents.

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Antimicrobial and Antiviral Respiratory Materials

Cited by 2 publications

References 29 publications

Increasing the Insulation Properties of Filter Respirators to Protect Miners’ Respiratory Organs From Dust

Increasing the Insulation Properties of Filter Respirators to Protect Miners’ Respiratory Organs From Dust

Impregnated Fibrous Chemisorbents for the Colorimetric Detection of Ammonia

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