ABSTRACT

The use of additives for resins modification is common practice in wood-based panel industry and wheat flour has been one of the most widely used extenders for decades. The amount of wheat flour to be added is determined through a sense of proportion, mainly based on experience, as systematic scientific studies on the effect of its individual components are limited. In this study, we added wheat flour, wheat starch and wheat protein as extenders in various quantities to urea (UF) and phenol formaldehyde (PF) resins and analysed their structure, pH value and buffer capacity through closely examining their interaction with the resins as well as their effect on viscosity and bonding strength development. As a result, wheat protein proved to be the most effective on both resins. Despite influencing adhesive properties in uncured state, no effect on the curing behaviour of the resins could be observed.

摘要

使用添加剂进行树脂改性是人造板行业的常见做法，几十年来小麦粉一直是最广泛使用的增量剂之一。小麦粉的添加量是通过比例感确定的，主要基于经验，因为对其各个成分的影响的系统科学研究是有限的。在本研究中，我们将不同数量的小麦粉、小麦淀粉和小麦蛋白作为填充剂添加到尿素 (UF) 和酚醛 (PF) 树脂中，并通过仔细检查它们与树脂的相互作用来分析它们的结构、pH 值和缓冲能力，如以及它们对粘度和粘合强度发展的影响。结果，小麦蛋白被证明对两种树脂最有效。尽管影响未固化状态的粘合性能，