Preparation and properties of silicate inorganic external wall insulation materials based on heat storage

IF 1.1 4区工程技术 Q4 THERMODYNAMICS Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci2302941l

Qing Li, Hao Chen, Zhidong Li

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Abstract

In this article, the foaming slurry after the reaction of silicate inorganic gelling material sodium silicate and foaming agent azodicamide is taken as the main investigation object, and the mechanism of bubble nucleation and the effect of physical parameters such as temperature, time, viscosity and surface tension on the structure of bubble pores are analyzed. As well as the influence of processing technology such as foiling temperature, heating rate, holding time and various kinds of modifiers on the structure and properties of the material, the appropriate processing technology conditions and modifiers are screened out, and an inorganic foiling insulation material with light weight, high strength, heat preservation, fire prevention, no pollution, low cost, simple process and easy to use is prepared. The experimental results show that, although the properties of the prepared material are better with the increase of azodicarbonamide (ADC) content and viscosity, the maximum amount of ADC added is only 1%. When the ADC content in the system is greater than 1%, the foaming slurry will appear gel, which is not conducive to the late high temperature foaming and the uniformity of the final product. Therefore, the optimal amount of ADC is 1% of the mass of sodium silicate.

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基于蓄热的硅酸盐无机外墙保温材料的制备及性能研究

本文以硅酸盐无机胶凝材料水玻璃与发泡剂偶氮二酰胺反应后的发泡浆料为主要研究对象，分析了气泡成核的机理以及温度、时间、粘度、表面张力等物理参数对气泡孔结构的影响。以及铝箔温度、升温速率、保温时间、各种改性剂等加工工艺对材料结构和性能的影响，筛选出适宜的加工工艺条件和改性剂，制备出质轻、高强、保温、防火、无污染、成本低、工艺简单、使用方便的无机铝箔保温材料。实验结果表明，随着偶氮二甲酰胺(ADC)含量和粘度的增加，制备的材料的性能得到了改善，但ADC的最大加入量仅为1%。当体系中ADC含量大于1%时，发泡浆料会出现凝胶状，不利于后期高温发泡和最终产品的均匀性。因此，ADC的最佳用量为水玻璃质量的1%。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.