Microwave-assisted foaming and sintering high-strength and antistatic polypropylene bead foams by constructing conductive 3D skeleton structure

Ding, Mingqi; Xu, Dawei; Wang, Qi

doi:10.1016/j.compositesa.2022.107196

Cited by 15 publications

(7 citation statements)

References 51 publications

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“…The energy absorption capacity of the material under quasi-static loading can be evaluated by the integrated area under the stress–strain curve (see Supporting Information on Figure S4 and Table S2). Figure D shows the comparison of the energy absorption capacity per unit volume for various materials at 50% deformation. ,,− It is observed that, compared to other polymer porous matrix structures, PCM-6 wt % possesses a higher value in energy absorption per unit volume (W v ) (specific comparisons see Supporting Information on Table S3). Furthermore, the incorporation of the lattice with porous material (i.e., a lattice composite structure) shows a more promising prospect in terms of energy absorption, ,− as depicted by the values illustrated in Figure D.…”

Section: Resultsmentioning

confidence: 99%

Cancellous Bone-like Polyurethane Foam: A Porous Material with Excellent Properties for Ultra-high Energy Absorption

Tan,

Cai,

et al. 2024

ACS Appl. Polym. Mater.

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Compared to osteoporotic bone, normal cancellous bone exhibits greater resistance to impact and energy absorption. The Gibson−Ashby model of cellular structure reveals that the enhancement is attributed to a unique combination of the thick wall and small pores in porous materials. Inspired by this design concept, here, a cancellous bone-like PU foam was developed through the planetary centrifugal mixing (PCM) method. Different from previously reported high energy absorption materials, this porous material possesses a thick-wall (average thickness of 33 μm) and micropore (average size of less than 55 μm) morphology. The enlarged SEM image revealed the presence of nanoscale dispersed conductive carbon blacks embedded within the thick walls in a primary aggregate state. Furthermore, the Raman spectrometer provided additional insights into the interaction between carbon black and the PU matrix. This unique morphology was achieved by the dual actions of centrifugal and tangential forces exerted by PCM, whereby challenges in efficient mixing and dispersion of highly viscous material were successfully overcome. The unique microstructure endows the foam with ultra-high compressive strength (yield strength of 17.0 MPa) and energy absorption capacity (12.19 MJ/m 3 ), which are comparable to polyimide foam (3.31 MJ/m 3 ) and many lattice composite structures (5−14.07 MJ/m 3 ) that are well known for their high energy absorption properties. In addition to the impressive energy absorption capacity, excellent comprehensive properties, such as antistatic property (an electrical conductivity of 0.346 S/m), a low thermal conductivity (0.0274 W/m•K), and fast heating responsiveness (increase by 40 °C within 180 s), are also obtained in this foam. In contrast to the complex and costly approaches in fabricating ultra-high energy absorption materials, this simple and cost-effective method opens up an attractive way in obtaining high energy absorption material with excellent comprehensive properties by a onestep PCM procedure.

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Section: Resultsmentioning

confidence: 99%

Cancellous Bone-like Polyurethane Foam: A Porous Material with Excellent Properties for Ultra-high Energy Absorption

Tan,

Cai,

et al. 2024

ACS Appl. Polym. Mater.

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“…Considering the varying interaction of microwaves with materials, maintaining the material-specific skin depth at approximately 4.7 µm at 2.45 GHz was necessary to prevent direct particle-microwave interaction at room temperature. Microwave hybrid heating (MHH) using charcoal as a susceptor material overcame microwave reflection by rapidly heating the powder mixture [60][61][62][63][64][65]. To prevent contamination, a pure graphite sheet served as a separator between the susceptor and the powder mixture during MHH.…”

Section: Development Of Claddingmentioning

confidence: 99%

Green Microwave-Assisted Cladding: Enhancing SS-304 with Ni-ZrB2 Composite Coatings

Singla

et al. 2024

E3S Web of Conf.

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This study focuses on achieving effective deposition of a Ni and 15% ZrB2 particle mixture onto SS-304 substrate surfaces through meticulous preparation steps. Thorough cleaning of the SS-304 substrate using alcohol in an ultrasonic bath eliminated contaminants, ensuring optimal adhesion. Simultaneously, the Ni-ZrB2 mixture underwent preheating at 1200°C for 20 hours in a muffle furnace to eliminate moisture content, crucial for preventing coating defects. Uniform distribution of the preheated powder onto the substrate was crucial for consistent coating thickness. Microwave hybrid heating (MHH) using charcoal as a susceptor material overcame microwave reflection by rapidly heating the powder mixture. SEM analysis revealed a uniform dispersion of both Ni and ZrB2 particles across the substrate surface, indicating successful deposition and optimal adhesion. The cladding resulted in a significant improvement in surface hardness, with an increase of approximately 42.43%. The wear rate, measured at 0.00178 mm³/m, and the coefficient of friction, determined to be 0.246, provided crucial insights into the surface’s wear resistance and frictional behavior, confirming its suitability for applications requiring enhanced durability and performance. These findings highlight the efficacy of the microwave-assisted cladding process in enhancing SS-304 with Ni-ZrB2 composite coatings, paving the way for its utilization in various industrial applications.

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“…Reproduced with permission. 53 Copyright 2022, Elsevier. (B) Lightweight and conductive PS composite foams (B1: cell structure, B2: morphology of interface, B3: conductivity, and B4: specific EMI shielding effectiveness).…”

Section: Pva-based Foamsmentioning

confidence: 99%

“…To date, only a limited number of commodity polymers, such as expandable polystyrene (EPS), expanded polyethylene (EPE), and expanded polypropylene (EPP), have been successfully commercialized. [45][46][47][48][49][50][51][52][53] Conventional foaming technologies are currently limited to commodity polymers, resulting in foams with inadequate mechanical properties, heat resistance, composition diversity, and functional capabilities. Additionally, these foams tend to be highly flammable and difficult flame retarded.…”

Section: Introductionmentioning

confidence: 99%

Progress in preparation of high‐performance and multi‐functional polymer foams

Li,

Xu,

Bai

et al. 2023

Journal of Polymer Science

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Polymer foams are widely used owing to their distinctive cell structure and properties. However, polymer foams prepared by traditional foaming technologies are mainly from commodity polymers due to the difficulties of foaming at high temperature and have the problems such as poor mechanical properties and heat resistance, limited composition and functions, susceptibility to combustion, and challenges in achieving flame retardancy. This article presented a comprehensive review of our research on polymer foams that exhibit high performances and multiple functions. The study encompassed advanced foaming equipment, high‐temperature foaming of supercritical carbon dioxide, foaming of polymer‐based micro/nano‐functional composites, microwave selective sintering and foaming, as well as the development of novel polymer foams derived from engineering plastics and special engineering plastics, water‐soluble poly(vinyl alcohol), and multi‐functional polymer composites, which could not be prepared by the traditional foaming technologies. These advancements broaden the potential application fields of polymer foams.

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Microwave-assisted foaming and sintering high-strength and antistatic polypropylene bead foams by constructing conductive 3D skeleton structure

Cited by 15 publications

References 51 publications

Cancellous Bone-like Polyurethane Foam: A Porous Material with Excellent Properties for Ultra-high Energy Absorption

Cancellous Bone-like Polyurethane Foam: A Porous Material with Excellent Properties for Ultra-high Energy Absorption

Green Microwave-Assisted Cladding: Enhancing SS-304 with Ni-ZrB2 Composite Coatings

Progress in preparation of high‐performance and multi‐functional polymer foams

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