化学活性胶合界面增强生物质胶黏剂的木材胶合性能  

Wood Bonding Properties of Biomass Adhesives Enhanced by Chemically Active Bonding Interface

作　　者：刘同达 杜官本[1] 黄腾华[2] 潘礼成 杨龙 LIU Tongda;DU Guanben;HUANG Tenghua;PAN Licheng;YANG Long(Yunnan Province Key Lab of Wood Adhesives and Glued Products/International Joint Research Center for Biomass Materials,Southwest Forestry University,Kunming 650224,China;Guangxi Forestry Research Institute,Nanning 530002,China;Chongzuo Guanglin Difen New Material Technology Co.,Ltd.,Guangxi Chongzuo 532203,China)

机构地区：[1]西南林业大学,云南省木材胶黏剂及胶合制品重点实验室/生物质材料国际联合研究中心,昆明650224 [2]广西壮族自治区林业科学研究院,南宁530002 [3]崇左广林迪芬新材料科技有限公司,广西崇左532203

出　　处：《包装工程》2024年第23期1-9,共9页Packaging Engineering

基　　金：国家重点研发计划(2023YFD2201500);云南省重大科技专项(202402AE090027)。

摘　　要：目的开发生物质胶黏剂并将其应用于木质复合材料的制备,并深入探究化学活性胶合界面构建对胶合性能的影响。方法对单宁进行氧化处理,同时对纤维素进行氨基功能化改造,以二者为原料设计单宁-纤维素生物质基胶黏剂,并通过3-缩水甘油醚氧基丙基三甲氧基硅烷对天然木材表面接枝,构建富含环氧基团的活性木材表面。在热压过程中,活化木材表面上的环氧基团与胶黏剂中的—NH2基团发生反应,从而构建化学活性胶合界面。通过DSC、DMA以及力学性能等测试,深入探究了化学活性胶合界面构建对胶合性能的影响。结果成功构建了超强、耐水型全生物质的木材胶合界面,胶合试件的干强度、热水强度和沸水强度分别为3.27、2.15和1.85 MPa,热水强度和沸水强度实现了从0到2.15 MPa和从0到1.85 MPa的显著提升。结论胶黏剂与木材表面的相互作用,即胶黏剂与化学活性木材表面之间形成的化学胶合界面,显著提升了胶合产品的胶合强度和耐水性能。The work aims to develop a bio-based adhesive,apply it to the preparation of wood-based composites and further investigate the effect of chemical activated bonding interface construction on the bonding properties.Tannin was oxidized and cellulose was modified with amino group,and a tannin-cellulose biomass-based adhesive was designed,and an activated wood surface rich in epoxy groups was constructed by grafting 3-glycidoxypropyltrimethoxysilane to the natural wood surface.A chemical activated bonding interface was constructed by reacting the epoxy groups on the activated wood surface with the—NH2 groups in the adhesive during the hot-pressing process.The effect of chemical activated bonding interface construction on the bonding properties was explored by DSC,DMA,and mechanical properties tests.A ultrastrong,water-resistant,all-biomass wood bonding interface was constructed,and the dry,hot,and boiling water bonding strengths of the bonding specimens were 3.27,2.15,and 1.85 MPa,respectively.The wet strength increased significantly from 0 MPa to 2.15 MPa and 1.85 MPa.The interaction between the adhesive and the wood surface,i.e.,the formation of a chemical bonding interface between the adhesive and the chemical activated wood surface,significantly enhances the bonding properties and water resistance of the bonding products.

关 键 词：活化木材表面 生物质基胶黏剂 化学胶合界面 耐水性 

分 类 号：TB32[一般工业技术—材料科学与工程] TB33TB48