Investigation of a new natural particleboard adhesive composed of tannin and sucrose
Investigation of a new natural particleboard adhesive composed of tannin and sucrose
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DOI：
10.1007/s10086-014-1405-3
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发表时间：
2014-08-01
影响因子：
2.9
通讯作者：
Umemura, Kenji
中科院分区：
文献类型：
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作者：
Zhao, Zhongyuan;Umemura, Kenji
面对日益减少的化石燃料资源和减少与石化相关的排放的环境要求，对使用天然替代品的木材复合材料粘合工艺的需求非常强烈。在本研究中，刨花板是用一种由单宁和蔗糖组成的新型材料粘合剂制造的，并在200℃下热压10分钟，达到0.8 g/cm(3)的目标密度。我们找到了席子含水量、单宁与蔗糖的比例和树脂含量的最佳值，分别为3-6 wt%、25/75 wt%和30-40 wt%。在此优化条件下制备的刨花板，其断裂模量和弹性模量分别为19.6 ~ 21.2 MPa和4.6 ~ 5.0 GPa。内部粘结强度在1.1 ~ 1.3 MPa之间。基于这些结果，与单宁和蔗糖结合的刨花板的机械性能高于JIS A 5908第18类标准（2003）的要求。在厚度膨胀试验（TS）中，该数值在20- 23%之间；随着蔗糖与树脂含量之比的增加，TS值降低。利用傅里叶变换红外光谱研究了单宁与蔗糖的反应机理，并对二甲基醚桥进行了观察。因此，单宁和蔗糖的混合物可以用作刨花板的天然粘合剂。
In the face of dwindling fossil fuel resources and the environmental imperative to reduce emissions associated with petrochemistry, there is strong demand for a wood composite bonding procedure using natural alternatives. In this study, particleboards were manufactured with a new material adhesive composed of tannin and sucrose, and hot-pressed at 200 A degrees C for 10 min, to a target density of 0.8 g/cm(3). We found optimal values for the mat moisture content, the ratio of tannin to sucrose and the resin content of 3-6 wt%, 25/75 and 30-40 wt%, respectively. When the particleboards were manufactured under these optimum conditions, the modulus of rupture and the modulus of elasticity were in the range of 19.6-21.2 MPa and 4.6-5.0 GPa, respectively. The internal bond strength was in the range of 1.1-1.3 MPa. Based on these results, the mechanical properties of particleboard bonded with tannin and sucrose were higher than the requirements of the JIS A 5908 type 18 standard (2003). In the thickness swelling test (TS), the value was in the range of 20-23 %; as the ratio of sucrose and resin content increased, the TS value decreased. The reaction mechanism between tannin and sucrose was studied by fourier transform infrared spectroscopy, and the dimethylene ether bridges were observed. Consequently, it is possible that a tannin and sucrose mixture can be used as a natural adhesive for particleboard.