Triazine derivatives as organic phase change materials with inherently low flammability

Png, Zhuang Mao; Soo, Xiang Yun Debbie; Chua, Ming Hui; Ong, Pin Jin; Xu, Jianwei; Zhu, Qiang

doi:10.1039/d1ta07422a

Cited by 40 publications

(15 citation statements)

References 47 publications

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“…Broadly speaking, the strategies employed can be classified as encapsulation-based strategies, [13][14][15][16][17] and matrix containment strategies. [18][19][20][21][22] These strategies have met with significant success, with many matrix achieving 60%-80% PCM loading, with a corresponding thermal energy storage capacity of more than 120 J/g being fairly commonplace. 23 However, some fundamental challenges remain for these strategies.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene glycol/polylactic acid block co‐polymers as solid–solid phase change materials

et al. 2023

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Phase change materials (PCMs) are promising thermal energy storage materials due to their high specific latent heat. Conventional PCMs typically exploit the solid-liquid (s-l) transition. However, leakage and leaching are common issues for solid-liquid PCMs, which have to be addressed before usage in practical applications. In contrast, solid-solid (s-s) PCMs would naturally overcome these issues due to their inherent form stability and homogeneity. In this study, we report a new type of s-s PCM based on chemically linked polyethylene glycol (PEG, the PCM portion) with polylactic acid (PLA, the support portion) in the form of a block co-polymer. Solid-solid latent heat of up to 56 J/g could be achieved, with melting points of between 44 °C and 55 °C. For comparison, PEG was physically mixed into a PLA matrix to form a PEG:PLA composite. However, the composite material saw leakage of up to 9% upon heating, with a corresponding loss in thermal storage capacity. In contrast, the mPEG/PLA block co-polymers were found to be completely homogeneous and thermally stable even when heated above its phase transition temperature, with no observable leakage, demonstrating the superiority of chemical linking strategies in ensuring form stability.

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Section: Introductionmentioning

confidence: 99%

Polyethylene glycol/polylactic acid block co‐polymers as solid–solid phase change materials

et al. 2023

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“…[83] In this area, phase change materials could be potentially used to control the temperature so that a constant temperature environment could be obtained surrounding the tissues. [56,84,85] However, there are drawbacks to thermo-responsive hydrogels, where some polymers possess poor biodegradation properties, poor drug loading efficiency, gelation temperatures significantly higher than body temperature, low mechanical strength, and some may induce cytotoxicity. [86,87] Nevertheless, the concept and function of thermo-responsive hydrogels are still extremely useful in wound healing, and mitigation strategies can be performed to reduce or eliminate the shortcomings.…”

Section: Thermoresponsive Wound Dressingmentioning

confidence: 99%

Responsive hydrogel dressings for intelligent wound management

Wang

Yeo

et al. 2023

BMEMat

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Due to global aging problems, the rising number of patients suffering from chronic or hard‐to‐heal acute wounds imposes a significant burden on healthcare systems. Wound healing is a complicated and dynamic physiological process with distinct molecular and cellular levels at each phase. Despite numerous strategies and advanced wound dressings being developed, successful wound management through smart dressing materials that can adapt to changing wound microenvironments and address the needs of wounds at different stages remains a big challenge. Over the last decade, hydrogel‐based dressings have emerged as one of the most potent biomaterials for wound treatment with favorable biological characteristics and a high potential for active intervention during the wound‐curing process. In the current contribution, we present the most recent progress in smart hydrogel dressings that can regulate the release of therapeutics in response to external stimuli (such as light) as well as endogenous changes in wound environments (e.g., temperature, pH, glucose, and reactive oxygen species) to facilitate wound healing. We also introduce the cutting‐edge technologies of intelligent “sense‐and‐treat” dressings through a combination of built‐in sensors or sensing molecules with responsive hydrogels, which enable real‐time monitoring of wound conditions and prompt on‐demand therapy.

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“…Heat is a common stimulus which changes the physical properties of polymers, 186 in some cases, due to a change in chemical structure via breaking or forming bonds, leading to even more significant changes such as changes in polymer solubility. Such polymers are useful in some applications such as drug delivery 187,188 thermoelectric generator, 189,190 thermal energy storage [191][192][193] and liquid chromatography. 194,195 This section will discuss polymers with thermal-induced chemical structural changes, with particular focus on reversible chemical transformation and phase transitions, which could act as a new type of phase change materials.…”

Section: Thermal-induced Structure Switchmentioning

confidence: 99%

Stimuli-responsive structure–property switchable polymer materials

Png

Wang

Yeo

et al. 2023

Mol. Syst. Des. Eng.

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Triazine derivatives as organic phase change materials with inherently low flammability

Abstract: A series of triazine-based compounds (M1–M7) have been prepared from 1,3,5-triazine, 2,4,6-triamino-1,3,5-triazine, 2,4-dichloro-6-methoxy-1,3,5-triazine and 2-chloro-4,6-dimethoxy-1,3,5-triazine, and their thermal phase change properties.

Cited by 40 publications

References 47 publications

Polyethylene glycol/polylactic acid block co‐polymers as solid–solid phase change materials

Polyethylene glycol/polylactic acid block co‐polymers as solid–solid phase change materials

Responsive hydrogel dressings for intelligent wound management

Stimuli-responsive structure–property switchable polymer materials

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