Nanocellulose based shape-stabilized phase change material (PCM) for building construction

用于建筑施工的纳米纤维素基形状稳定相变材料 (PCM)

• 批准号: 2144068
• 金额: --
• 依托单位: Brunel University London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2144068
• 关键词: Nanocellulose; based; shape; stabilized; phase

In the recent years, the demand of green industry is to limit the usage of petroleum based chemicals since their increasing consumption is posing critical environmental problems, including rapid climate change, water pollution and harmful gas emissions along with threatening global-economy due to their high costs. Furthermore, it is important to realise that fossil raw materials and finite resources will deplete within a few generations, so using petroleum-based polymers should be avoided. In previous literature, the commonly used petroleum-based polymers to encapsulate phase change materials (PCMs) were melamine-formaldehyde, urea-formaldehyde, urea-melamine-formaldehyde, polystyrene, styrene, polyurethane and polyurea. Nanocellulose which is a biopolymer could be used instead since it is environmentally friendly and in the past it has proven to possess significant advancements in research and their applications in different fields. Technologies are yet to be developed to form shape-stabilized PCMs with nanocellulose and their incorporation in building systems. Objectives of the research Common problems arising in PCMs is leakage during the phase transition process which tends to limit their applications in various fields including thermal energy storage, solar energy storage, building materials and textiles. However, this problem can be solved through the formation of shape-stabilized PCMs, which involves either integration of PCM into a supporting material or microencapsulating PCM into a shell material which results in the formation of namely composite PCMs and microencapsulated PCMs. The specific objectives of the project may be summarised as follows: In this project shape-stabilized PCMs based on nanocellulose polymer will be developed by employing a feasible method to produce either PCM composites or microcapsules/ nanocapsules. Suitable type of PCM for building materials will be selected from previous literature i.e. PCM that exhibits desired characteristics such as high latent heat value and moreover, should be environmentally friendly. Development of functionalised biopolymer: Nanocellulose polymer will be developed from nanocellulose extracted from selected cellulosic material. The polymer will be further functionalised for the required properties for building materials, in addition to the encapsulation of the designated PCM to produce microcapsules or composites. PCM based construction materials will be developed. Various processes will be investigated to ensure the effective incorporation, stabilisation and efficiency of energy storage.

近年来，绿色工业的需求是限制石油基化学品的使用，因为石油基化学品的消费不断增加，造成了严重的环境问题，包括气候变化迅速、水污染和有害气体排放，以及由于其高昂的成本而威胁到全球经济。此外，重要的是要认识到，化石原料和有限的资源将在几代人内耗尽，因此应避免使用石油基聚合物。在以往的文献中，常用的包封相变材料（pcm）的石油基聚合物有三聚氰胺-甲醛、脲-甲醛、脲-三聚氰胺-甲醛、聚苯乙烯、苯乙烯、聚氨酯和聚脲。纳米纤维素是一种生物聚合物，因为它是环保的，而且在过去它已经被证明在不同领域的研究和应用中取得了重大进展。用纳米纤维素形成形状稳定的pcm并将其纳入建筑系统的技术还有待开发。相变相变材料相变过程中存在的常见问题是相变过程中的泄漏，这限制了相变相变材料在热储能、太阳能储能、建筑材料和纺织等领域的应用。然而，这个问题可以通过形成形状稳定的PCM来解决，这包括将PCM集成到支撑材料中或将PCM微封装到外壳材料中，从而形成复合PCM和微封装PCM。该项目的具体目标可以总结如下：在这个项目中，基于纳米纤维素聚合物的形状稳定的PCM将采用一种可行的方法来生产PCM复合材料或微胶囊/纳米胶囊。将从以前的文献中选择适合建筑材料的PCM类型，即PCM具有期望的特性，例如高潜热值，而且应该是环保的。功能化生物聚合物的发展：从选定的纤维素材料中提取纳米纤维素，开发纳米纤维素聚合物。除了封装指定的PCM以生产微胶囊或复合材料外，该聚合物还将进一步功能化，以满足建筑材料所需的性能。将开发基于PCM的建筑材料。各种过程将被调查，以确保有效的合并，稳定和效率的能源储存。