2024.12.20

As Executive Chairman

Since its establishment, the Association of China-Spain Science and Technology (hereinafter referred to as the Association) has been committed to promoting technological cooperation between China and Spain in line with its mission. Recently, the Association plans to hold the First International Symposium of China-Spain Young Scientists on Friday, December 20, 2024, in Madrid, with the theme "Green Technology and Sustainable Development". The purpose of the event is to foster academic exchange and collaboration between scholars from both countries, support the growth of young scientists, consolidate the academic resources, and provide more opportunities for cooperation and interaction. The symposium has received strong support from the Chinese Embassy in Spain, and Ambassador Yao Jing will attend the event to deliver the opening speech.

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2024.11.13

Invited speaker

Design and preparation of sandwich structure PCM composites

The green polymer PLA was used to load the commonly used phase change material work substance, PEG, and the continuous production can be realized through the classic polymer processing equipment, twin-screw extruder. BN was further chosen as thermal conductivity filler to fabricate an environmentally friendly phase change material with anti-leakage-shape stability and enhanced thermal conductivity. The results showed that PLA/PEG had excellent anti-leakage properties when the contents of PLA and PEG were comparable, namely 50 wt.% for PEG. Its phase transition enthalpy is at 70.01 J/g, and its thermal conductivity is at 0.246 W/(m∙K). The introduction of BN can significantly increase the thermal conductivity to 0.587 W/(m∙K) for sample PLA/PEG/BN 10 and 0.879 W/(m∙K) for sample PLA/PEG/BN 20. The samples modified by BN have very similar phase change enthalpy with that of PLA/PEG. TGA results showed that the introduction of BN can significantly improve the thermal stability of the composite material, and its maximum thermal decomposition temperature is increased by nearly 50°C compared with that of PLA/PEG. In the CONE test, the maximum heat release decomposition rate of sample PLA/PEG/BN 10 was significantly improved due to the wick effect. It is worth pointing out that this work has carried out the classic processing of green materials in an all-round way and obtained PLA/PEG/BN with improved comprehensive properties in line with the ideal material. Due to its high-efficiency preparation, green classic process, and good comprehensive performance, this series of phase-change composite materials is expected to be used in the fields of solar energy capture, construction, and thermal management of electronic products. We aim to further develop sandwich-structured PCM composites using the mentioned PCM samples above by printing CNT/PLA composite layer. The carbon composite layer will primarily enhance photothermal conversion performance, while the middle layer retains the original phase change latent heat storage properties. The samples with the CNT layer demonstrate significantly faster temperature increases compared to PCM composites modified with coatings, due to the high light absorption and thermal conversion efficiency of the newly developed material. This advancement greatly enhances the potential for effective energy conversion from solar light sources.

Funded by NEWSAFE

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2024.07.18, in Harbin (China)

Invited report

Advanced Sustainable Polymers

The main contents for this presentation are: (1) Main research line and facilities; (2) Brief introduction of PCM; (3) Fire safety characterization for PCMs; (4) Strategies for fire safe PCMs; (5) Our recent contributions on fire safe PCMs; (6) MSCA postdoctoral fellowship application; (7) Postdoctoral fellowship in Spain; and (8) Brief introduction about the life in Spain.

Funded by NEWSAFE

2024.06.17-2024.06-18

Invited speaker

Fire Safe Phase Change Materials

The main contents for this presentation are: (1) Main research line and facilities; (2) Brief introduction of PCM; (3) Fire safety characterization for PCMs; (4) Strategies for fire safe PCMs; and (5) Our recent contributions on fire safe PCMs.

Funded by NEWSAFE

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2023.10.23-2023.10.27

Invited speaker

Graphene Functionalization of Polyrotaxane Encapsulated PEG-based PCMs: Fabrication and Application

In recent decades, phase change materials (PCMs) have received much attention in thermal regulation of electronic devices. But the main limitation for the use of organic PCMs are the low thermal conductivity and leakage during the phase change process. This work will try to improve these limitations, to increase thermal conductivity of the leakage proof PCM formed by a polyrotaxane that serves as a support material to encapsulate Polyethylene glycol (PEG) as work substance. For this purpose, different contents of graphene nanoplatelets (GNP) would be blended. To facilitate its post-industrial production and to meet ecological standards, the synthesis of this PCM is simple and only use water as a solvent. The PCMs can be thermal processed conveniently by hot press. Furthermore, the PCMs created in this work achieves a high thermal performance with high enthalpy values (132.9 -142.9 J/g), due to the action of GNPs as thermal conductive ffllers, also experiencing an increase of 60%-257% in thermal conductivity values the higher the GNP content, and also shows a great shape stability and no leakage during its phase change. These improvements solve the main problems of organic PCMs thus making PLR-PEGGNPbased materials a good candidate to be used as thermal energy storage material in industrial applications as thermoregulator of solid-state disks or realizing the “shaving peaks and fflling valleys” effect for thermoelectric generator.

Funded by NEWSAFE

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