【作者】 周璐璐；

【导师】 李建章； 韩春蕊；

【作者基本信息】 北京林业大学 ， 木材科学与技术， 2012， 硕士

【摘要】 人造板及其制品是人居环境甲醛污染的主要来源。研究开发生物质胶黏剂替代目前普遍使用的脲醛树脂及其改性产品,解决人造板甲醛释放问题具有重要意义。本文以野生葛根淀粉和橡子淀粉为主要原料制备生物质胶黏剂,通过胶合板制备与性能检测,研究了淀粉酶用量、降黏时间、固体含量、聚醋酸乙烯酯(PVAc)乳液及异氰酸酯(MDI)用量等对胶合板胶合强度的影响,得出主要结论如下：1、野生葛根淀粉和橡子淀粉为主要原料制备淀粉基胶黏剂,能够满足Ⅱ类胶合板要求。且葛根淀粉胶黏剂的耐水胶合强度优于橡子淀粉胶黏剂,更适合做为制备淀粉胶黏剂的原料。2、橡子淀粉胶黏剂优化参数：淀粉酶A用量为橡子淀粉质量的0.8%,胶黏剂固体含量为30%,PVAc淀粉胶黏剂为1：1,MDI添加量为胶黏剂质量的20%。胶合板胶合强度为0.92MPa。3、葛根淀粉胶黏剂优化参数：淀粉酶B用量为葛根淀粉质量的0.2%,胶黏剂固体含量为40%,降解时间为30min,PVAc：淀粉胶黏剂为1：1,MDI添加量为胶黏剂质量的18.8%。胶合板胶合强度为1.89MPa。4、橡子淀粉作为主要原料制备脲醛树脂用填料替代小麦面粉,能够保证脲醛树脂胶黏剂的预压性能、胶合性能,制备的胶合板具有较低的甲醛释放量。更多还原

【Abstract】 Wood-based panel is the primary source of formaldehyde of human environment. It is significant that solving the emission of formaldehyde from wood-based panel by preparing a bio-based wood adhesive to replace the common urea-formaldehyde resin adhesive and its products at present.In this paper, the bio-based wood adhesive was prepared using wild arrowroot starch and acorn starch as raw materials. The effects of addition amount of amylase, polyvinyl acetate emulsion and isocyanate, degradation time, solids content on the bonding strength of plywood were investigated by preparing plywood and performance measuring. The experimental results showed that:1. The wild plant starch-based wood adhesives using wild arrowroot starch and acorn starch as raw materials can meet the type II Chinese Strandard plywood requirement. And the bonding strength of plywood of arrowroot starch is better than the bonding strength of acorn starch’s, so the arrowroot starch is more suitable to become the raw material of starch-based wood adhesives.2. Acorn starch adhesives optimization parameter:the addition amount of amylase A was0.8%weight of acorn starch, solids content was30%, PVAc:starch adhesive was1/1, the addition amount of MDI was20%weight of starch adhesive. The bonding strength of plywood was0.92MPa.3. Arrowroot starch adhesives optimization parameter:the addition amount of amylase B was0.2%weight of arrowroot starch, solids content was40%,degradation time was30min, PVAc:starch adhesive was1/1, the addition amount of MDI was18.8%weight of starch adhesive. The bonding strength of plywood was1.89MPa.4. The acorn starch as raw material preparing stuffing for UF resin can replace the common wheat stach, and the prepressing strength and bonding strength of its bonded plywood increased, the formaldehyde emission of the plywood were reduced.更多还原