Totally Bio-Based, Recyclable Wood Filler-Feather Resin Composite

ABSTRACT

We attempted to use the keratin resin as a crystallizable adhesive agent serving as the binder for the milled wood fillers to develop a totally bio-based wood filler-feather keratin resin composite (WKC). The milled feathers could be resinified easily via the hot-press compression molding. WAXD measurements revealed that the four-fold screw structure of the feather keratin crystal could be easily destroyed by mechanically milling. However, it was also revealed that the limited molecular rearrangement in the stacking direction of the β-sheets occurred during the hot-press compression molding. Compared with the hot-press compression molding, the sintering method was more effective not only to resinify the milled feathers but also to induce the recrystallization of feather keratin in both longitudinal and lateral directions. The WKC comprised of a feather resin matrix produced using the finely milled feathers exhibited superior mechanical properties. Unevenly milled feathers seemed to conduct heterogeneous resinification. As a result, the adhesion at the interface between the wood filler and feather resin became weaker. The newly developed WKC could retain the bending properties comparable to those of a virgin one even after the successive milling-remolding procedure for three times.

摘要

我们尝试使用角蛋白树脂作为可结晶粘合剂, 作为研磨木材填料的粘合剂, 以开发完全生物基木材填料羽毛角蛋白树脂复合材料 (WKC). 研磨后的羽毛可以通过热压模压容易地塑化. WAXD测量表明, 羽毛角蛋白晶体的四重螺旋结构很容易被机械研磨破坏. 然而, 也发现在热压成型过程中, β-片材在堆叠方向上发生了有限的分子重排. 与热压模压成型相比, 烧结法不仅能更有效地使铣削后的羽毛树脂化, 而且能在纵向和横向诱导羽毛角蛋白的再结晶. WKC由使用精细研磨羽毛生产的羽毛树脂基质组成, 具有优异的机械性能. 研磨不均匀的羽毛似乎进行了异种树脂化. 因此, 木材填料和羽毛树脂之间的界面附着力变弱. 新开发的WKC即使在连续三次铣削重塑程序后仍能保持与原始WKC相当的弯曲性能.

KEYWORDS:

• Composite
• feather keratin
• wood filler
• material recycle
• recrystallization
• adhesive agent

关键词:

• 混合成的
• 羽毛角蛋白
• 木材填料
• 材料回收
• 再结晶
• 粘合剂

Acknowledgments

The authors wish to thank Prof. Shinji Hirai of Muroran Institute of Technology for his support to perform the sintering molding experiments.

Disclosure statement

No potential conflict of interest was reported by the author(s).