Activating relaxation-controlled diffusion mechanisms for tailored moisture resistance of gelatin-based bioadhesives for engineered wood products
Activating relaxation-controlled diffusion mechanisms for tailored moisture resistance of gelatin-based bioadhesives for engineered wood products
复制标题
激活松弛控制扩散机制，为工程木制品定制明胶基生物粘合剂的防潮性
DOI：
10.1016/j.compositesa.2016.02.013
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Srubar, Wil V.
中科院分区：
文献类型：
--
作者：
Hess, Kristen M.;Srubar, Wil V.
本文使用明胶（亲水性生物聚合物）作为用于工程木制品的模型生物基树脂，证明了通过激活弛豫控制的扩散机制来定制生物粘合剂的防潮性的可行性。研究了明胶-水浓度和单宁添加对明胶基生物粘合剂中水传输动力学的影响。层压（a）明胶和（B）明胶-单宁木材单板复合材料在中等和高湿度条件下的随时间变化的弯曲力学性能进行了表征，并与定向刨花板和胶合板进行了比较。结果表明，明胶和单宁含量的增加不仅降低了明胶基树脂的吸水率，体积膨胀率和最大含水量，而且还越来越多地诱导弛豫控制的水分扩散行为，这意味着短期的防潮性和长期的亲湿性。这种行为可以用来解决服务中（即，强度，刚度）和停用（即，快速生物降解）的要求。
The feasibility of tailoring the moisture resistance of bioadhesives by activating relaxation-controlled diffusion mechanisms is demonstrated herein using gelatin, a hydrophilic biopolymer, as a model biobased resin for engineered wood products. The effect of gelatin-to-water concentration and tannin addition on the governing kinetics of water transport in gelatin-based bioadhesives was investigated in this work. Time-dependent flexural mechanical properties of laminated (a) gelatin and (b) gelatin–tannin wood veneer composites conditioned at both moderate and high humidity were characterized and compared to oriented strand board and plywood. Results indicate that increases in both gelatin and tannin content not only decrease rates of water uptake, volumetric swelling, and maximum moisture contents of gelatin-based resins, but also increasingly induce relaxation-controlled moisture diffusion behavior, which implies short-term moisture resistance and long-term moisture affinity. This behavior could be leveraged to address both in-service (i.e., strength, stiffness) and out-of-service (i.e., rapid biodegradation) requirements for engineered wood products.
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DOI：
--
发表时间：
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期刊：
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