无机填料改性小麦蛋白/单宁复合胶粘剂的制备及性能研究  

Preparation and properties of inorganic filler modified wheat protein/tannin composite adhesive

作　　者：程增会[1] 王基夫[1] 张代晖 王春鹏[1] 储富祥[1] Cheng Zenghui;Wang Jifu;Zhang Daihui;Wang Chunpeng;Chu Fuxiang(Institute of Chemical Industry of Forest Products,CAF,Key Lab of Biomass Energy and Material,Jiangsu Province,Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjingg 210042,Jiangsu,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏省林业资源高效加工利用协同创新中心,江苏南京210042

出　　处：《中国胶粘剂》2024年第2期43-48,56,共7页China Adhesives

基　　金：江苏省生物质能源与材料重点实验室项目(JSBEM-S-202321)。

摘　　要：以小麦蛋白(WG)和缩合单宁(CTs)为原料,制备了无甲醛的生物基木材胶粘剂。利用蒙脱土、高岭土、重质碳酸钙、轻质碳酸钙和羟基磷灰石为填料进行改性,采用共混的方式制备填料改性复合胶粘剂。考察了无机填料种类对WG/CTs复合胶粘剂性能的影响,并进行耐水胶合强度、扫描电子显微镜(SEM)、热重分析仪、沸水煮不溶率、黏度等测试分析。研究结果表明:加入填料后,WG/CTs复合胶粘剂的黏度均有不同程度的增大,胶粘剂的热稳定性也比对照组胶粘剂有所提高;不同无机填料改性胶粘剂的耐水性存在显著差异,但胶合板的湿态强度均超过0.7 MPa,达到国家II类胶合板标准的要求;沸水煮不溶率测试结果显示,轻质碳酸钙改善了胶粘剂的耐水性;SEM图和胶层裂纹评估显示,重质碳酸钙、轻质碳酸钙与胶粘剂具有良好的相容性,表明碳酸钙填料对胶层的韧性没有影响,是较好的填料选择。Formaldehyde-free bio-based wood adhesive was prepared by using wheat protein(WG)and condensed tannin(CTs)as raw materials.Using montmorllonite,kaolin,heavy calcium carbonate,light calcium carbonate and hydroxyapatite as fllers for modification,the filler-modified composite adhesive was prepared by the blending method.The influence of inorganic filler type on the properties of WG/CTs composite adhesive was investigated,and water-resistance bonding strength,scanning electron microscopy(SEM),thermogravimetric analysis,insolubility in boiling water,viscosity and other tests were analyzed.The research results showed that after adding fllers,the viscosity of WC/CTs composite adhesive increased to varying degrees,and the thermal stability of adhesive was also improved compared to the control group adhesive.There were significant dfferences in the water resistance of adhesive modified with different inorganic fillers,but the wet strength of plywood all exceeded O.7 MPa,meeting the requirements of the national standard of Class II plywood.The test results of insolubility in boiling water showed that light calcium carbonate improved the water resistance of adhesive.SEM images and crack assessment of adhesive layer showed that heavy calcium carbonate and light calcium carbonate had good compatibility with the adhesive,indicating that calcium carbonate filler had no effect on the toughness of adhesive layer and was a good filler choice.

关 键 词：小麦蛋白 缩合单宁 无机填料 胶粘剂 胶合强度 

分 类 号：TQ432[化学工程]