Ann: Joint Venture for Advanced Nanomaterial Research Formalised, page-178

Another interesting white paper...
(I'm putting them here until a proper thread is made.)

This one is out of Shanghai ...
looks like they are trying to do something with thermal energy storage?!
Oh Boy! 8-/


https://www.sciencedirect.com/science/article/pii/S0169131719303072


Research Paper
Polyethylene glycol infused acid-etched halloysite nanotubes for melt-spun polyamide-based composite phase change fibers

Author links open overlay panelHengxueXiang¹JialiangZhou¹YangkaiZhangMugaanire TendoInnocentMeifangZhu
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Received 31 May 2019, Revised 29 July 2019, Accepted 30 July 2019, Available online 5 August 2019.

https://doi.org/10.1016/j.clay.2019.105249Get rights and content

Highlights

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Acid-etched halloysite nanotubes (A-HNTs)/polymer-based PCMs and PA6/PEG@A-HNTs fibers are fabricated.
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The phase change enthalpy of PEG@A-HNTs PCMs reached to 112 J/g.
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The phase change enthalpy of melt-spun PA6/PEG@A-HNTs fibers reached to 13.6 J/g.
Abstract

The unique tubular structure and morphology of inorganic nanotubes makes them very useful supporting materials for thermal energy storage. Lending these properties in the form of composites together with traditional organic phase change materials (PCMs) can solve the existing energy storage and thermal stability problems in PCMs.

Here, the acid-etching halloysite nanotubes (A-HNTs) are prepared and employed as inorganic supporting materials to encapsulate polyethylene glycol (PEG). The N₂ physisorption results indicated that the specific surface area and pore volume of A-HNTs increased from 45.4m²/g, 0.243cm³/g to 253.4 m²/g and 0.621 cm³/g before and after acid etching leading to an effective PEG load increase from 50 mass% to 70 mass% of composite PCMs.

This increasing encapsulation capacity of PEG had a beneficial effect on the phase change performances and the latent heat of the prepared PEG/A-HNTs composite PCMs which reached 112 J/g (as compared to 70.64 J/g of PEG/HNTs). The temperature- regulating time of heat storage and release process were >500 s and 491 s respectively.

Further, the DSC thermograms with 100 thermal cycles and TGA results demonstrated that the PEG/A-HNTs composites had an excellent thermal reliability and stability for preparing phase-change fibers by high-temperature melt spinning. The thermal enthalpy, thermal regulating time and relative temperature difference of resultant PA6/PEG/A-HNTs reached 13.57 J/g, 206 s and 3.2 °C, respectively.
Graphical abstract

Acid-etched halloysite nanotubes (A-HNTs)/polymer-based PCMs are designed and fabricated. The phase change enthalpy of PEG@A-HNTs composites reached up to 112 J/g (as compared to 70.64 J/g of PEG@HNTs), and the temperature-regulating time of heat storage and release process are >500 s and 491 s, respectively.

The excellent heat resistance of PEG@A-HNTs makes them competent to prepare melt-spun PA6/PEG/A-HNTs phase change fibers. The thermal enthalpy, thermal regulating time and relative temperature difference of this fibes reached 13.57 J/g, 206 s and 3.2 °C, respectively