Hollow fibres for medical applications. A review

Perepechkin, L. P.; Perepechkina, N. P.

doi:10.1007/bf02358251

Cited by 4 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In medicine, hollow fiber membranes are utilized in numerous applications as hemodialysis, hemofiltration, and plasmapheresis [16]. However, a particular important role in the development of CFD membrane modelling can be attributed to blood oxygenation.…”

Section: Introductionmentioning

confidence: 99%

Computation of Global and Local Mass Transfer in Hollow Fiber Membrane Modules

et al. 2020

View full text Add to dashboard Cite

Computational fluid dynamics (CFD) provides a flexible tool for investigation of separation processes within membrane hollow fiber modules. By enabling a three-dimensional and time dependent description of the corresponding transport phenomena, very detailed information about mass transfer or geometrical influences can be provided. The high level of detail comes with high computational costs, especially since species transport simulations must discretize and resolve steep gradients in the concentration polarization layer at the membrane. In contrast, flow simulations are not required to resolve these gradients. Hence, there is a large gap in the scale and complexity of computationally feasible geometries when comparing flow and species transport simulations. A method, which tries to cover the mentioned gap, is presented in the present article. It allows upscaling of the findings of species transport simulations, conducted for reduced geometries, on the geometrical scales of flow simulations. Consequently, total transmembrane transport of complete modules can be numerically predicted. The upscaling method does not require any empirical correlation to incorporate geometrical characteristics but solely depends on results acquired by CFD flow simulations. In the scope of this research, the proposed method is explained, conducted, and validated. This is done by the example of CO2 removal in a prototype hollow fiber membrane oxygenator.

show abstract

Section: Introductionmentioning

confidence: 99%

Computation of Global and Local Mass Transfer in Hollow Fiber Membrane Modules

et al. 2020

View full text Add to dashboard Cite

show abstract

“…While the production volume increased slightly in Southeast Asia, chemical fibre production decreased by approximately 5% in highly developed countries (USA, ASEAN countries, Japan, Western Europe). The demand for polyimide fibres dropped significantly, which is confirmed by the absence of generalized data on new developments in subsequent review articles [16][17][18]. The comparative thermostability and other mechanical characteristics of Arimid T fibre and Armos, SVM, and man foreign fibres (Nomex, Conex, Kermel, PBI, P-84) are only mentioned in [19,20].…”

Section: Fibresmentioning

confidence: 59%

Thermostable fibres and the carbon-fibre-reinforced plastics made from them

Грибанов

Sazanov

2007

Fibre Chem

View full text Add to dashboard Cite

The specific features of creation of highly thermostable composite materials based on thermostable fillers and binders are examined. There has been some progress in synthesis, modification, and pilot-industrial production of polyimides that satisfy the many-sided requirements of the 21st century. The possibility of assigning products of thermochemical reactions of polymers based on polyacrylonitrile to thermostable organic compounds capable of modifying thermostable binders is discussed. The necessity of theoretical studies of modeling the thermal transformations of the initial products in composite mixtures is demonstrated. The necessity of structural orientation of macrochains of the reacting components for realization of the cocarbonization principle is substantiated.Production of thermostable fibres and materials made from them became an urgent problem in the second half of the 20th century. The successful breakthrough in space was due to solution of a number of materials science problems related to creating new materials capable of working for a long time in extreme conditions.One major problem in science, engineering, and technology is significant expansion of the temperature boundaries of use. Based on a number of indexes, thermostable materials, primarily inorganic materials, have not been totally suited for solving this problem. This primarily concerned the mechanical indexes, high specific density of inorganic insulators, complexity in manufacturing technology, restriction of natural resources, etc. For this reason, the search for new thermostable insulators has been concentrated on creating synthetic materials based on macromolecular compounds. Polymers used as electrical and thermal insulators, frequently combined with inorganic materials, already existed. However, their performance characteristics were only stable up to 100°C.The search for more thermostable polymers began with a study of many organic compounds resistant to high temperatures. New polymers containing different aromatic and heterocyclic compounds were such compounds. Polyoxazoles, polyoxadiazoles, polythiodiazoles, polytriazines, etc., were synthesized. Polymers with condensed rings, i.e., formed by a combination of benzene rings with five-and six-member heterocycles, were of special interest. It was found that the combination of two condensed cyclic structures in such polymers as polybenzimidazoles, polyquinoxalines, etc., increased the stability of the macromolecules to 300°C. Transitioning from laboratory samples to mass-produced industrial articles was very difficult, since it required not only obtaining thermostability of the new polymers but also ensuring their stability in sharp temperature drops, from -190 to +400°C. These polymers simultaneously had to have sufficient strength, flexibility, and elasticity.The subsequent search for organic structures that satisfied these requirements showed that some polymers withstand brief heating to 600°C without marked decomposition, and these compounds in the polymer chain are much better ...

show abstract

“…Nowadays for life-threatening pandemics such as COVID-19, the development of novel, fast and cost-efficient techniques for virus detection [ 6 , 7 ] is required. The possibility of using hollow fibres fabricated from transparent materials within the UVC range through which fluids flow was investigated for this purpose [ 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…This approach opens the supplementary contact surfaces for UVC radiation with the fluids. The 3D channels for contamination fluids generated inside packed metamaterials drastically eliminate the friction between the liquid and metamaterial characteristics [ 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Topological Avenue for Efficient Decontamination of Large Volumes of Fluids via UVC Irradiation of Packed Metamaterials

Enaki,

Munteanu,

Paslari

et al. 2023

Materials

View full text Add to dashboard Cite

Nowadays, metamaterials application enjoys notoriety in fluid decontamination and pathogen annihilation, which are frequently present in polluted fluids (e.g., water, blood, blood plasma, air or other gases). The depollution effect is largely enhanced by UVC irradiation. The novelty of this contribution comes from the significant increase by packing of the total surface of metamaterials in contact with contaminated fluids. Packed metamaterial samples are subjected to UVC irradiation, with expected advantages for implant sterilization and long-term prevention of nosocomial infections over large clinical areas. The novel aspect of the investigation consists of a combination of big and small elements of the metamaterial to optimize the above effects connected with fluids and irradiation. The big elements allow the radiation to penetrate deep inside the fluid, and the small elements optimally disperse this radiation toward deeper regions of the metamaterial. A packing scheme of smaller, in-between large metamaterial spheres and fibres is proposed for promoting enhanced depollution against pathogen agents. It is demonstrated that the total surface of metamaterials in contact with contaminated fluids/surface is significantly increased as a result of packing. This opens, in our opinion, new auspicious perspectives in the construction of novel equipment with high sensibility in the detection and decontamination of microorganisms.

show abstract

Hollow fibres for medical applications. A review

Cited by 4 publications

References 10 publications

Computation of Global and Local Mass Transfer in Hollow Fiber Membrane Modules

Computation of Global and Local Mass Transfer in Hollow Fiber Membrane Modules

Thermostable fibres and the carbon-fibre-reinforced plastics made from them

Topological Avenue for Efficient Decontamination of Large Volumes of Fluids via UVC Irradiation of Packed Metamaterials

Contact Info

Product

Resources

About