The study of the properties of carbonized cassava cortex/epoxy composite for electrical insulation

Omah, A. D.; Omah, E. C.; Mgbemene, Chigbo A.; Ezema, I. C.; Aigbodion, V.S.; Offor, P. O.; Oji, E. O.; Madu, S.

doi:10.1007/s00170-019-04062-w

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…[158] According to Gaspar and co-workers, [166] agriculture wastes can be classified as stalks, husks, and grain of crops or as raw materials in the form of fibers from crop residues. Due to the natural and organic characteristic, low cost, easy availability, and renewability, a huge type of crop residues, for example, sugarcane, [167,168] cork, [169] cassava cortex, [170] bamboo fibers, [171] sunflower husk, hazelnut shell, [172] maize cob, [173] and walnut shell [174] have been used in polymer composites. Masłowski and coworkers [175] have incorporated cereal straw in vulcanized rubber.…”

Section: Package and Plastics Wastesmentioning

confidence: 99%

Eco‐friendly polymer composites: A review of suitable methods for waste management

Cabrera

2021

Polymer Composites

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The amount of residues generated by agriculture, industrial, or urban activities continuously increases and, consequently, demands several methods for their correct management. The incorrect disposal can cause, in specific cases, environmental contamination by heavy metals or leaching as well as promote the spread of diseases as insect proliferation. Commonly, landfilling, incinerating, composting, or energy/fuel generation can control the disposal or reuse of residues. Among the methods for the reuse of wastes, the incorporation of residues as fillers in polymer composites has emerged as a distinct field. Some composites can potentially mitigate leaching compounds or improve mechanical, thermal, and acoustic properties. However, these improvements are a challenge to promote the use of waste fillers. Thus, this study aims to provide a state of view regarding a variety of wastes used as fillers in polymer composites and different methods to reach mechanical reinforcement as well as improve thermal conductivity and acoustic attenuation for future researches.

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Section: Package and Plastics Wastesmentioning

confidence: 99%

Eco‐friendly polymer composites: A review of suitable methods for waste management

Cabrera

2021

Polymer Composites

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“…Polymer nanocomposites are used in power capacitors for electrical energy storage [16][17][18]. Details of nano-and for Electrical Engineering Applications [19,20]. There is the feasibility of using cassava cortex particles as reinforcement in an epoxy matrix for the development of composite materials with insulation properties (resistivity) [21].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the properties of epoxy/silicone blends for high-voltage capacitor applications

khan

Hassan

Shaikh

et al. 2022

Journal of Electrical Systems and Inf Technol

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In recent decades, high dielectric constant (k) polymer nanocomposites have proved excellent potential in dielectric and energy storage applications. Epoxy/silicon rubber composite materials have shown promising properties in applications such as high-voltage insulation. Three types of nanomaterials (SiO2, TiO2, and TiO2@SiO2) with distinct intrinsic properties are carefully chosen to build high-k epoxy/silicone polymer nanocomposites in this study. To raise the value of K, this work tailored the polarizing ability or permittivity of dielectric material by inserting different weight ratios of nano-fillers (SiO2, TiO2, TiO2@SiO2) in the base matrix of dielectric material in epoxy and silicon rubber blends. With a base matrix containing 75% epoxy and 25% liquid silicone rubber concentration, the maximum value of K obtained is K = 158 for 5% TiO2 and there is an increase in the dielectric strength to 398 kV/mm. The obtained results indicate that, among the three different kinds of epoxy/silicone, TiO2@SiO2 has the most potential in enhancing the energy storage capabilities of the proposed nanocomposites, owing to the largest increase in k while maintaining low dielectric loss and leakage current.

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“…Cortex is a thin‐walled tissue between the epidermis and the vascular bundle (Kerp, 2018). Cortical cells usually contain resins, essential oils and tannins, which confer partial resistance to pests (Budel et al, 2018; Omah et al, 2019; Wiesneth & Jurgenliemk, 2017). Cuticles mainly contained wax, coating the outside of the epidermal cells.…”

Section: Introductionmentioning

confidence: 99%

“…tannins, which confer partial resistance to pests (Budel et al, 2018;Omah et al, 2019;Wiesneth & Jurgenliemk, 2017). Cuticles mainly contained wax, coating the outside of the epidermal cells.…”

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confidence: 99%

Comparative study on Pseudaulacaspis pentagona resistance of four different cultivars of kiwifruit

Zheng

Zhang

et al. 2023

Annals of Applied Biology

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Background:Kiwifruit is a common and popular fruit around the world. However, white peach scale (Pseudaulacaspis pentagona) [Targioni-Tozzetti], a scale insect with a wide range of hosts, seriously affects the yield and quality of kiwifruit. To investigate the differences in resistance of different kiwifruit cultivars to Pseudaulacaspis pentagona, cellular structure and gene expression assays were used to explain the mechanism. Results :In this study, based on the stability of the rate of injury fruit, we selected four cultivars from fty kiwifruits for in-depth study, including "LC-04285", "CF-3", "DA-7B" and "Hayward". By analyzing the differences in the anatomical structure of the canes of these cultivars, we found that the resistant cultivar "LC-04285" had thicker cuticle, denser epidermis and cortex. The real-time quantitative PCR data indicated that the expression levels of genes related to cuticle synthesis and formation of epidermis and cortex are also higher in "LC-04285". Jasmonic acid (JA) is an important hormone involved in plant defense against many insect pests. In this study, we found that the expression levels of JA receptor COI1 were higher in "LC-04285". However, the expression levels of AcJAZs, which played negative role in JA signaling, were higher in susceptible cultivar "Hayward". Besides, the expression levels of AcICS, AcPAL4, AcPAL5, and AcNPRs, which were involved in salicylic acid (SA) synthesis and SA response, were also higher in "LC-04285". Conclusions:Our results revealed the mechanism of kiwifruit resistance to P. pentagona at the molecular and cellular levels. This study provided useful guidance for breeding insect-resistant kiwifruit in future.P. pentagona was cultured in the insect rearing facility of The Sichuan Provincial Academy of Natural Resource Science. Twelve-hour newborn female eggs of P. pentagona on pumpkin or potato were collected before the test. One-year-old canes (approximately 1.0-1.5 m long and 1-2 cm in diameter), including "LC-04285", "CF-3", "DA-7B" and "Hayward", were collected in winter (middle of December in China). The canes were wrapped in black plastic and held in a cool store at 0-2℃, RH60-70%. The laboratory experiment was set up 1-2 months later (Jan. or Feb.) in a controlled environment room at kiwifruit laboratory, Chengdu. The environmental conditions were 25℃, 70±10% Relative Humidity (RH), with a 14 h light:10 h dark photoperiod regime.The kiwifruit canes were removed from the cold store, marked and cut into 60 cm with removing the bottom of 10 cm. Each cane length was labelled and the buds were cut off. All wounds were sealed with Vaseline. Each cane was gently wrapped 6-9 turns with wool, providing a place for the eggs and crawlers to colonize [56]. Each kiwifruit cultivar had ve replicates. Colonization rate and survival rate measurementThe female eggs (about 200) of P. pentagona were gently transfer to the sites which wrapped turns on branches using stroke pen. The branches were placed at an angle of 30-50 ° to ensure that the eggs would not ...

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The study of the properties of carbonized cassava cortex/epoxy composite for electrical insulation

Cited by 4 publications

References 11 publications

Eco‐friendly polymer composites: A review of suitable methods for waste management

Eco‐friendly polymer composites: A review of suitable methods for waste management

Tailoring the properties of epoxy/silicone blends for high-voltage capacitor applications

Comparative study on Pseudaulacaspis pentagona resistance of four different cultivars of kiwifruit

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