Effect of Surface Treatment of Carbon Black Filled Insulation Foam Based on Modified Recycled Palm Oil

Uthaipan, Nattapon; Kongprabat, Thansiri; Suwan, Anutida; Chaisit, Thawanrat; Saetung, Anuwat; Saetung, Nitinart

doi:10.1007/s10924-022-02533-y

Cited by 4 publications

(2 citation statements)

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“…Larger cell sizes facilitate greater intracellular convective heat transfer, resulting in higher thermal conductivity. 40 As the SEM images show (Figure 4), PCM-0 wt % possesses a relatively uniform cell size distribution and a smaller average cell size in comparison with PCM-3 and PCM-6 wt %, contributing to a lower thermal conductivity. As for PCM-9 wt %, due to the appearance of numerous amounts of microscopic cells with a size lower than 55 μm, the average cell size is smaller than that of the PCM-0 wt %, resulting in better thermal insulation with a thermal conductivity of 0.0274 W/m•K in comparison with the value of 0.0321 W/m•K in PCM-0 wt %.…”

Section: Resultsmentioning

confidence: 95%

“…The thermal conductivity of porous materials is influenced by various factors, among which the pore size and distribution play a significant role. Larger cell sizes facilitate greater intracellular convective heat transfer, resulting in higher thermal conductivity . As the SEM images show (Figure ), PCM-0 wt % possesses a relatively uniform cell size distribution and a smaller average cell size in comparison with PCM-3 and PCM-6 wt %, contributing to a lower thermal conductivity.…”

Section: Resultsmentioning

confidence: 99%

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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: 95%

Section: Resultsmentioning

confidence: 99%