无机矿物改性对脲醛树脂胶粘剂及其制备纤维板性能的影响  

Effects of inorganic mineral modification on properties of urea formaldehyde resin adhesive and its prepared fiberboard

作　　者：张文治 王素鹏 马龙 杨守禄 刘明[4] 卿彦[4] 吴义强[4] 卢立[4] Zhang Wenzhi;Wang Supeng;Ma Long;Yang Shoulu;Liu Ming;Qing Yan;Wu Yiqiang;Lu Li(Guangxi Fenglin Wood Industry Group Co.,Ltd.,Nanning 530221,Guangxi,China;Shengxiang Industry(Jiangsu)Co.,Ltd.,Danyang 212300,Jiangsu,China;Guizhou Academy of Forestry,Guiyang 550005,Guizhou,China;Central South University of Forestry and Technology,Changsha 410004,Hunan,China)

机构地区：[1]广西丰林木业集团股份有限公司,广西南宁530221 [2]圣象实业(江苏)有限公司,江苏丹阳212300 [3]贵州省林业科学研究院,贵州贵阳550005 [4]中南林业科技大学,湖南长沙410004

出　　处：《中国胶粘剂》2021年第7期1-6,12,共7页China Adhesives

基　　金：林业科学技术推广项目([2019]23);湖南省教育厅优秀青年项目(18B181);圣象集团-圣象实业(江苏)有限公司科技创新项目(G.YF-QH-201905001);广西科技重大专项(桂科AA17204087-18);广西木质板材加工工程技术研究中心项目(桂科ZY20198026);贵州省科技支撑计划项目(黔科合支撑[2018]2196,黔科合支撑[2021]一般334,黔科合支撑[2020]4Y101)。

摘　　要：采用甲醛、尿素和三聚氰胺制备了改性脲醛树脂胶粘剂(MUF),并分别用硅藻土和粉煤灰制备了不同比例的无机矿物粒子改性脲醛树脂胶粘剂,然后利用改性脲醛树脂制备了纤维板。探究了两种无机矿物(硅藻土和粉煤灰)改性对脲醛树脂胶粘剂及其制备纤维板性能的影响。研究结果表明:在脲醛树脂中大量引入无机矿物,对其黏度影响较小,但会增加树脂的固体含量,并显著延长其固化时间;当w(硅藻土)=10%(相对于脲醛树脂质量而言),纤维板的静曲强度由36.7 MPa提高至46.3 MPa,弹性模量由3358 MPa提高至3789 MPa,内结合强度由0.83 MPa提高至0.93 MPa,24 h吸水厚度膨胀率可由12.6%降低至9.4%;无机矿物的引入,减少了纤维板制造对纤维、胶粘剂等物料的消耗,并且为高性能纤维板环保制造提供支撑。The modified urea formaldehyde resin adhesive(MUF)was prepared by formaldehyde,urea and melamine.Diatomite and fly ash were used to prepare different proportions of inorganic mineral particles modified urea formaldehyde resin adhesive.And then modified urea formaldehyde resin was used to prepare fiberboard.The effects of modification of two inorganic minerals(diatomite and fly ash)on the properties of urea formaldehyde resin adhesive and its prepared fiberboard were studied.The research results showed that the introduction of a large amount of inorganic minerals into urea formaldehyde resin had little effect on its viscosity,but it could increase the solid content of resin and significantly prolong its curing time.When w(diatomite)=10%(relative to the mass of urea formaldehyde resin),the modulus of rupture of fiberboard increased from 36.7 MPa to 46.3 MPa,the modulus of elasticity increased from 3358 MPa to 3789 MPa,the internal bond strength increased from 0.83 MPa to0.93 MPa,and the 24 h water absorption thickness swelling could be reduced from 12.6%to 9.4%.The introduction of inorganic minerals reduced the consumption of fiber,adhesive and other raw materials in fiberboard manufacturing,which provided support for the manufacturing of environmental friendly and high performance fiberboard.

关 键 词：胶粘剂 纤维板 脲醛树脂 硅藻土 粉煤灰 

分 类 号：TQ433[化学工程]