Renewable natural resources reinforced polyurethane foam for use of lightweight thermal insulation

Shao, Huaiqi; Zhang, Qiyuan; Han, Lixin; Guo, Wenjing; Yong, Jiang; Lin, Chen; Hé, Lǚ; Qi, Jinqiu; Xiao, Hui; Chen, Yuzhu; Huang, Xingyan; Xie, Jiulong; Shupe, Todd F.

doi:10.1088/2053-1591/ab8d87

Cited by 27 publications

(14 citation statements)

References 27 publications

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“…Shao and co‐workers [ 256 ] have incorporated wood fiber, bamboo fiber, rice husk in polyurethane also using liquefied polyol. The authors have proved that the incorporation of fibers enhanced the mechanical strength and the thermal conductivity increase with the fiber incorporation, ranging from 0.045 to 0.065 W m −1 K −1 .…”

Section: Agriculture 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: Agriculture Wastesmentioning

confidence: 99%

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

Cabrera

2021

Polymer Composites

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“…Thermal conductivity and compressive strength of the biomimetic swallow nest structure composites compared with other composites a. − Compressive strength and bulk density of the biomimetic swallow nest structure composites compared with other composites b − …”

Section: Resultsmentioning

confidence: 99%

Biomimetic Swallow Nest Structure: A Lightweight and High-Strength Thermal Insulation Material

Zheng

Zuo

2022

ACS Nano

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A common method for reducing carbon emissions and the load-bearing pressure of buildings, and while also achieving improved energy conservation is to prepare porous magnesium-based lightweight composites to reduce waste and environmental hazards. However, due to internal stress, the pores of traditional lightweight composites crack easily and collapse, resulting in composites that are brittle with poor water resistance. These materials cannot achieve both low density and high strength, which limits their application in advanced functional materials. Thus, learned from nature, inspired by swallow’s nest, a solution has been proposed, which is a simple and fast chemical arrangement and assembly method. Using bamboo scraps as the supporting framework and methylcellulose (MC) molecular chains as the templates, 5-phase crystals are grown and arranged on the MC. These crystals are arranged on the bamboo scraps by chemical means with MC acting as a bridge. At the same time, using the high viscosity and flexibility of the vinyl acetate/ethylene (VAE) copolymer emulsion and the formation of magnesium acetate chelate from VAE and hydration products, crystals and bamboo scraps can be assembled. Through these organic–inorganic copolymers, an intercalated and integrated biomimetic swallow nest structure is formed. The biomimetic swallow nest structure composites (BSNSC) imitated the formation process of a natural swallow nest. It is a lightweight material with a thick wall, low connectivity rate, and regular shape. Its density is 0.42 g/cm3, which is still in the density class of ultralight inorganic foam materials, and its compressive strength reaches 6.5 MPa, three times that of ordinary composites. The structure has a strength-to-weight ratio 3.5 times that of ordinary composites and a thermal conductivity much lower than of other thermal insulation materials. In the future, this type of lightweight composites with high strength, high heat insulation, and low density not only functions as a good energy-saving material for buildings but also a good thermal insulation material in the aerospace field.

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“…Excessive consumption and waste disposal of PET is a worldwide environmental concern. [4][5][6][7] To address these issues, various physical and chemical methods for recycling PET waste into useful products have been investigated extensively. 8,9 PET flakes can be converted into PET fibers using two modes of operation: chemical as well as mechanical recycling.…”

Section: Introductionmentioning

confidence: 99%

“…Polyethylene terephthalate (PET) finds diverse usages in fabric, sheets, wrapping materials, 1 thermic insulant, 2 and automotive application 3 because of its exceptional physical, chemical, and thermo‐mechanical attributes. Excessive consumption and waste disposal of PET is a worldwide environmental concern 4–7 . To address these issues, various physical and chemical methods for recycling PET waste into useful products have been investigated extensively 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Effect of polyethylene terephthalate fiber reinforced with non‐hydrophilic nano‐silica on the mechanical, thermic, and chemical shielding characteristics of saturated polyurethane composite

Nikam

Rao

Shertukde

2022

J of Applied Polymer Sci

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The research investigates the reinforcing effect of scrap polyethylene terephthalate (PET) fiber, non‐hydrophilic nano‐SiO2(NS‐972) and heat suppressing agents in saturated polyurethane (SPU) composites. PET fiber was obtained through industrial mechanical processing from scraped PET. Thermic and surface morphology of synthesized SPU composites was characterized by using scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Thermic characteristics of filled PU,NS‐PET fiber (1.5%)‐APM (1:1) (PU‐NF1.5A) composite with (1:1) proportion of additive NS‐PET fiber (0.5–2%) and halogen free fire‐extinguishing additives APM (0–3%) were determined utilizing UL‐94, TGA, critical oxygen index, and smoke density. The tensile properties of the composite improved to 42.27% (4.14 MPa) when the filler content was increased to 1.5%. The WCA, moisture permeability and chemical resistance analysis indicated that fabricated composite films with variable additive content had excellent hydrophobicity and improved resistance to water, humidity, and chemical resistance. TGA data shows the increased thermal resistance of reinforced PU composite is attributed to the increased thermal deterioration temperature, resulted to the higher thermic degradation temperature of the terephthalic and sebacic acids used in the synthesis of PU. Smoke producing capacity of composite PU‐NF1.5A (0–3%) reduced from 82% to 52%. The LOI improved from 19 to 23 (−vol.%) at 3% APM additives.

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Renewable natural resources reinforced polyurethane foam for use of lightweight thermal insulation

Cited by 27 publications

References 27 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

Biomimetic Swallow Nest Structure: A Lightweight and High-Strength Thermal Insulation Material

Effect of polyethylene terephthalate fiber reinforced with non‐hydrophilic nano‐silica on the mechanical, thermic, and chemical shielding characteristics of saturated polyurethane composite

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