用香草醛交联壳聚糖粘结的中密度纤维板的制备与性能

Preparation and Properties of Medium-Density Fiberboards Bonded with Vanillin Crosslinked Chitosan.

作者信息

Cao Yanwei, Qin Chen, Zhao Zhengbo, Wang Zhe, Jin Chunde

机构信息

College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, China.

Key Laboratory of Wood Science and Technology, Hangzhou 311300, China.

出版信息

Polymers (Basel). 2023 May 30;15(11):2509. doi: 10.3390/polym15112509.

An eco-friendly medium-density fiberboard (MDF) was prepared using vanillin (V) crosslinked chitosan (CS) adhesive through a hot-pressing process. The cross-linking mechanism and the effect of different proportions of added chitosan/vanillin on the mechanical properties and dimensional stability of MDF were investigated. The results showed that vanillin and chitosan are crosslinked to form a three-dimensional network structure due to the Schiff base reaction between the aldehyde group of vanillin and the amino group of chitosan. At the same time, when the mass ratio between vanillin/chitosan was 2:1, MDF obtained the best mechanical properties, the maximum modulus of rupture (MOR) of 20.64 MPa, the mean modulus of elasticity (MOE) of 3005 MPa, the mean internal bonding (IB) of 0.86 MPa, and the mean thickness swelling (TS) of 14.7%. Therefore, the MDF bonded with V-crosslinked CS can be a promising candidate for environmentally-friendly wood-based panels.

通过热压工艺，使用香草醛（V）交联壳聚糖（CS）粘合剂制备了一种环保型中密度纤维板（MDF）。研究了交联机理以及不同比例添加壳聚糖/香草醛对MDF力学性能和尺寸稳定性的影响。结果表明，由于香草醛的醛基与壳聚糖的氨基之间发生席夫碱反应，香草醛和壳聚糖交联形成三维网络结构。同时，当香草醛/壳聚糖的质量比为2:1时，MDF获得了最佳力学性能，最大抗折强度（MOR）为20.64 MPa，平均弹性模量（MOE）为3005 MPa，平均内结合强度（IB）为0.86 MPa，平均厚度膨胀率（TS）为14.7%。因此，用V交联CS粘结的MDF有望成为环保型人造板的候选材料。