随着人类可持续性发展意识的增强,木材的功能化改性及应用日益受到人们关注。以巴尔沙木为载体,采用氢氧化钾和亚氯酸钠法对其进行脱木质素预处理,并在真空环境下浸渍聚乙烯醇(PVA)和荧光粉,可制备具有发光性能的PVA发光木。研究PVA发光木的微观结构、分子组成、晶体结构和机械性能,结果表明:大量的PVA和荧光粉填充并固化在巴尔沙木的孔隙内,使其相较于未改性的巴尔沙木具有更大的应力值(70.01MPa),机械性能得到提升。将PVA发光木应用于封装发光二极管(LED),进行老化实验,验证了PVA发光木作为LED封装薄膜具有一定的可行性,这也为制备木基封装膜提供了简单途径。
With the growing awareness of sustainable development,the functional modification and application of wood have generated a lot of interest.Balsa wood was used as a carrier and was pretreated with potassium hydroxide and sodium chlorite to obtain delignified wood,and then was immersed in polyethylene glycol (PVA) and fluorescent powder in a vacuum environment to prepare PVA luminescent wood.The microstructure,molecular composition,crystal structure and mechanical properties of PVA luminescent wood were studied.The results showed that a large amount of PVA and phosphors were filled and solidified in the pores of balsa wood,resulting in a higher stress value (70.01MPa) and an improved mechanical performance compared to unmodified balsa wood.The PVA luminescent wood was applied to encapsulate light-emitting diode (LED).Aging test was carried out to verify the feasibility of PVA luminescent wood as LED packaging film,providing a simple way for the preparation of wood-based encapsulation films.
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基金资助
国家自然科学基金(12004201)
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