任一萍　刘红征　郭文静　戴月萍

摘要：探讨双组分水性高分子异氰酸酯胶黏剂（API）用于胶合高密度重组竹结构材的可行性，采用力学实验机、DMA和SEM等方法，比较自制API与冷固型苯酚—间苯二酚—甲醛树脂（PRF）分别胶合的重组竹结构材试件的压缩剪切强度、木破率、热力学数据以及胶合界面情况。结果显示：API和PRF胶合的重组竹均有较高的干强度值和木破率值;高温处理可显著提高两种树脂的强度;DMA储能模量显示API与PRF胶合的重组竹热力学性能相似;SEM显示PRF胶合的重组竹韧性较API略强。 API胶合的重组竹剪切强度值超过标准规定值，说明合适的API可用于重组竹结构材的胶合。

关键词：API;PRF;重组竹;压缩剪切强度;热力学性能

中图分类号：S785文献标识码：A文章编号：1006-8023（2019）02-0045-05

Adhesion Performance Comparison of Structural Bamboo Scrimber with Two Kinds of Resin

REN Yiping 1， LIU Hongzheng 2， GUO Wenjing 1， DAI Yueping 2

（1. Research Institute of Wood Industry， Chinese Academy of Forestry， Beijing 100091; 2. Hangzhou Dasso Technology Co. LTD， Hangzhou 311251）

Abstract：In order to evaluate the feasibility of using Aqueous polymer isocyanate （API ）to bonding high density structural bamboo scrimber， compressive shear strength， wood failure ratio， thermal properties and interface morphology of two kinds of structural bamboo scrimber adhesion with API and PRF resins were investigated by mechanical testing machine， dynamic mechanical analysis （DMA） and scanning electronic microscope（SEM） respectively. Results showed that both of dry compressive shear strength and wood failure ratio of bamboo scrimber bonding with API and PRF were high， and they were raised obviously by high temperature treatment. DMA date showed that both of their thermodynamic properties were similar. It can be seen that tenacity of API was weaker than PRF from SEM. The shear strength of bamboo scrimber bonding with API was higher than the value of standard ofStructural glued laminated timber.The results showed that proper API could be used to glue structural bamboo scrimber.

Keywords：API; PRF; bamboo scrimber; compressive shear strength; thermodynamic property

0引言

双组分异氰酸酯树脂（API）系水性高分子聚合物胶粘剂，因不含甲醛成分又被称为环保型粘合剂，因其固化速度快、耐湿热及老化性能好、尺寸稳定性及胶合强度高等优点，正越来越多地应用在家具粘接及木质集成材的生产中 [1-3]。随着我国实木资源减少，而有丰富资源的竹子受到重视，大量具有自主知识产权的竹制产品产生，其中高密度重组竹的研究和生产快速发展，因其原材料利用率高、机械化生产程度高，加之产品性能好、强度高被广泛运用在室内外装饰及建筑梁柱中 [4-10]。这种具有密度高、硬度大的重组竹大量用于结构材，其材料之间的胶合决定了产品的质量，因其表面质密使其胶合较困难，对胶……