文章摘要
肖运彬,李志华,梁晟源,胡继文,林树东,涂园园.水性环氧树脂包覆有机蒙脱土制备木材胶粘剂[J].精细化工,2019,36(11):0
水性环氧树脂包覆有机蒙脱土制备木材胶粘剂
Preparation of wood adhesive by waterborne epoxy resin encapsulated organic montmorillonite
投稿时间:2019-03-19  修订日期:2019-04-12
DOI:
中文关键词: 水性环氧树脂  蒙脱土  乳液  复合胶粘剂
英文关键词: waterborne epoxy resin  montmorillonite  emulsions  composite adhesives
基金项目:广东省自然科学基金(2016A030313163)
作者单位E-mail
肖运彬 中科院广州化学研究所 xiaoyb05@163.com 
李志华 中科院广州化学研究所  
梁晟源 中科院广州化学研究所  
胡继文 中科院广州化学研究所 hujiwen@gic.ac.cn 
林树东 中科院广州化学研究所  
涂园园 中科院广州化学研究所  
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中文摘要:
      摘要:水性环氧树脂通常含有水溶性分子或分子链,导致在高温和潮湿条件下作为木材胶粘剂时耐水性及力学性能较差。采用有机改性的纳米蒙脱土改性水性环氧树脂增强水性环氧树脂胶粘剂的耐水性及力学性能。并通过乳液包覆蒙脱土的方法与直接共混的方法对比,研究了不同添加量有机蒙脱土(0%,3%,6%,9%)对胶粘剂性能的影响。胶粘剂的耐水性及力学性能通过测量胶粘剂在干燥及潮湿条件下的剪切强度来表示。通过TGA、SEM、TEM、DSC研究了复合胶粘剂的热稳定性和结构。结果表明,在水性环氧树脂中添加有机改性的纳米蒙脱土,可以有效地提高胶粘剂的粘结强度,此外,采用乳液包有机覆蒙脱土的方法比直接共混的方法制备得到胶粘剂,有机蒙脱土在胶粘剂中分布更均匀,具有更优异的力学性能,说明有机蒙脱土在复合材料中的分散质量是影响复合胶粘剂性能的主要原因。
英文摘要:
      Abstrct: Waterborne epoxy resins have poor water resistance and mechanical properties as wood adhesives at elevated temperatures and humid conditions due to containing water-soluble molecules or molecular chains. The organic modified nano-montmorillonite was mixed with waterborne epoxy resin to improve the water-resistance and mechanical properties of waterborne epoxy resin adhesives. The effect of different additions of organic-montmorillonite (0%, 3%, 6%, 9%) on the properties of the adhesive was studied by comparing the method of emulsion coating of montmorillonite with the direct addition method. The properties of composite adhesives were characterized by measuring the shear strength of wood block shear-type assemblies bonded with new formulated adhesives in dry and wet. The thermal stability and structure of the composite adhesives were investigated by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). The results show that shear strength of wood joints increased in all states by adding montmorillonite. Inclusion of organic-montmorillonite improved the thermal stability of adhesives to different degrees depending on montmorillonite loading. In addition, compared with the method of directly adding nano-montmorillonite, the adhesive was prepared by emulsion-coated montmorillonite, the organic-montmorillonite was more uniformly distributed in the adhesive and has better mechanical properties. It indicates that the dispersion quality of organic -montmorillonite in composites is the main reason for the performance of composite adhesives.
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