A Novel Nano-Fiber of Iranian Gum Tragacanth-Polyvinyl Alcohol/Nanoclay Composite for Wound Healing Applications

Heydary, Hamid Amiri; Karamian, Ebrahim; Poorazizi, Elahe; Khandan, Amirsalar; Heydaripour, Jalil

doi:10.1016/j.mspro.2015.11.079

Cited by 67 publications

(15 citation statements)

References 8 publications

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“…Calcium carbonate produced by chemical method has small particle size, narrow distribution, and controllable crystal shape. Its performance is obviously better than that of calcium carbonate prepared by physical method [20].…”

Section: Nano Ultrafine Calcium Carbonatementioning

confidence: 90%

Planning Research on Application of Nanomaterial Technology in Disaster Prevention and Reconstruction

Shao

Yan²,

2020

Journal of Chemistry

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An earthquake causes a huge loss of life and property. After an earthquake, many buildings are seriously damaged or collapsed. On the one hand, it is necessary to make full use of nanomaterials technology to improve seismic strength during reconstruction; on the other hand, scientific planning is needed to reduce pollution, carbon emissions, and energy consumption. This paper mainly studies the application of nanomaterial technology in disaster prevention and reconstruction. Through a series of planning safeguard measures, the overall seismic performance of the city is improved in order to provide theoretical guidance and technical support for disaster prevention and reconstruction. This paper mainly introduces the stress analysis of frame joints after earthquake and the planning of urban disaster prevention and reconstruction. In addition to the different types of concrete materials (ordinary concrete, nano silica fiber concrete, PVA fiber concrete), the fixed amount of water, superplasticizer, reinforcement, sand, and gravel, the concrete strength grade is C30. Then, three kinds of concrete frame joints are tested under low cycle cyclic loading to compare the seismic performance of the three kinds of concrete. The experimental results show that the fuzzy evaluation of urban disaster prevention and reconstruction planning has been carried out for 6 communities in this city. Among them, 4 communities are qualified and 2 communities are unqualified. Therefore, it is necessary to focus on seismic reinforcement or carry out urban planning research again. Compared with ordinary concrete, the bearing capacity and ductility coefficient of nano silica fiber concrete and PVA fiber concrete are increased by 37.8% and 15.6%, respectively. It is proved that the seismic performance of nano silica fiber reinforced concrete is far better than that of ordinary concrete.

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Section: Nano Ultrafine Calcium Carbonatementioning

confidence: 90%

Planning Research on Application of Nanomaterial Technology in Disaster Prevention and Reconstruction

Shao

Yan²,

2020

Journal of Chemistry

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“…high percentage of IGT confers superior mechanical, chemical stability, and degradation of IGT/PVA eNFs [ 96 ].…”

Section: Figurementioning

confidence: 99%

An Overview of Biopolymeric Electrospun Nanofibers Based on Polysaccharides for Wound Healing Management

et al. 2020

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Currently, despite the thoroughgoing scientific research carried out in the area of wound healing management, the treatment of skin injuries, regardless of etiology remains a big provocation for health care professionals. An optimal wound dressing should be nontoxic, non-adherent, non-allergenic, should also maintain a humid medium at the wound interfacing, and be easily removed without trauma. For the development of functional and bioactive dressings, they must meet different conditions such as: The ability to remove excess exudates, to allow gaseous interchange, to behave as a barrier to microbes and to external physical or chemical aggressions, and at the same time to have the capacity of promoting the process of healing by stimulating other intricate processes such as differentiation, cell adhesion, and proliferation. Over the past several years, various types of wound dressings including hydrogels, hydrocolloids, films, foams, sponges, and micro/nanofibers have been formulated, and among them, the electrospun nanofibrous mats received an increased interest from researchers due to the numerous advantages and their intrinsic properties. The drug-embedded nanofibers are the potential candidates for wound dressing application by virtue of: Superior surface area-to volume ratio, enormous porosity (can allow oxy-permeability) or reticular nano-porosity (can inhibit the microorganisms’adhesion), structural similitude to the skin extracellular matrix, and progressive electrospinning methodology, which promotes a prolonged drug release. The reason that we chose to review the formulation of electrospun nanofibers based on polysaccharides as dressings useful in wound healing was based on the ever-growing research in this field, research that highlighted many advantages of the nanofibrillary network, but also a marked versatility in terms of numerous active substances that can be incorporated for rapid and infection-free tissue regeneration. In this review, we have extensively discussed the recent advancements performed on electrospun nanofibers (eNFs) formulation methodology as wound dressings, and we focused as well on the entrapment of different active biomolecules that have been incorporated on polysaccharides-based nanofibers, highlighting those bioagents capable of improving the healing process. In addition, in vivo tests performed to support their increased efficacy were also listed, and the advantages of the polysaccharide nanofiber-based wound dressings compared to the traditional ones were emphasized.

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“…[1][2][3][4] The performance of polymeric nanocomposites is highly impacted by the type and distribution of the utilized nanofiller. [5][6][7][8][9] To enhance electrical, mechanical, and thermal responses of polymers, most commonly graphene nanosheet and carbon nanotube (CNT) have been utilized in numerous engineering applications due to their unprecedented thermal (and electrical) conductivity and Young's modulus. [10][11][12][13][14] Graphene nanosheets with only one atom thickness and tightly packed structure have some advantages over CNTs such as higher interaction with matrix and lower costs.…”

Section: Introductionmentioning

confidence: 99%

Damped harmonic vibrations of axisymmetric graphene‐enhanced cylinders in thermal environment

Moradi‐Dastjerdi

Behdinan

2021

Polymer Composites

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In this paper, the structural damping behavior of axisymmetric nanocomposite cylinders enhanced with randomly oriented graphene nanosheets has been explored by a mesh-free solution. The static responses of such nanocomposite cylinders under internal pressure and exposed to thermal environment are assumed as the initial condition of harmonic vibrations. Using the shape functions of moving least squares (MLS), an axisymmetric mesh-free solution has been developed to approximate the displacement field of the graphene-enhanced nanocomposite (GEN) cylinders. Along the thickness of these cylinders, different nonlinear functionally graded (FG) patterns are considered for the distribution of graphene nanosheets. The mechanical properties of graphene and polymer are considered to vary with temperature, and the overall properties of nanocomposite are calculated using a modified Halpin-Tsai (HS) technique. The effects of thermal environment, graphene content, graphene dispersion, and cylinder dimension on the structural damped harmonic vibrations of axisymmetric GEN cylinders have been examined. The results indicate that the use of graphene nanosheets and their distribution significantly affect the damped harmonic vibrations of axisymmetric polymeric cylinders such that the increase of graphene content results in damped vibrations with higher frequency and shorter stationary time. In addition, thermal environment reduced the frequency of vibrations, but it has an insignificant impact on the stationary time of vibrations.

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A Novel Nano-Fiber of Iranian Gum Tragacanth-Polyvinyl Alcohol/Nanoclay Composite for Wound Healing Applications

Cited by 67 publications

References 8 publications

Planning Research on Application of Nanomaterial Technology in Disaster Prevention and Reconstruction

Planning Research on Application of Nanomaterial Technology in Disaster Prevention and Reconstruction

An Overview of Biopolymeric Electrospun Nanofibers Based on Polysaccharides for Wound Healing Management

Damped harmonic vibrations of axisymmetric graphene‐enhanced cylinders in thermal environment

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