Studies on the preparation and the characterization of resinified wood foams

修复的木材食品是第一个被尝试用化学修饰的木材制成的。作者已经找到了一种已储存和已认证的木材，可以在多功能有机化合物中分解。作为该解决方案的一种应用，修复的木材泡沫，作为空气和木材树脂的复合材料，已经进行了调查。Foam可以被发现作为一种重组的木材-多聚烯Foam，它是由化学反应方法和一种开放-模具-一次性方法组合使用的。这就是，在分解化学改良的木材后，将其用作聚合的木材粉末，如1，4-丁二醇或双酚A，并结合了超过50%的浓度，不同的水和聚氰酸酯化合物的数量被添加为一个雾化剂和一个硬化剂，尊重。当混合的解决方案允许在大约100 ° C的温度下站立，在2分钟内开始对解决方案进行发酵和修复。该产品是基于木材的聚氨酯泡沫。Foam在整个范围内需要价值的密度 ... More of about 0. 04 to 0. 6 g/ <cm^3> ， depending on blending composition of the raw materials。即使有了0.04克/ <cm 3>的密度，也有一个物质强度和一个用于压缩变形的恢复力，也可以得到加强。在本研究的高级阶段，可以找到更多的突出的泡沫，从未受污染的木制解决方案中可以获得。在多羟基酒精、聚乙烯糖醇（PEG）、二苯醇和其他四种不同的木材碎片和肉类中找到了被溶解的木材碎片和肉类。特别是，PEG解决方案中的泡沫的准备工作已被系统地研究。木材组件和PEG在解决方案中首先与丙烷氧化物或Caprolactone发生反应<epsilon>，介绍了与羟基末端组的各种侧链长度。然后，由添加如水和弗伦，调整用于发酵和多聚氰酸化合物的试剂，经过加热和加固的木质食品，具有广泛的密度范围可能会出现。这些泡沫的质量与那些与相应的商业产品相比较。Less（低）

Resinified wood foams were first tried to be prepared from chemically modified wood. The authors have found that esterified and etherified wood can be dissolved in polyfunctional organic compounds. As one of the application of the solution, the resinified wood foam, being a composite material from air and wood resins, has been investigated. The foam could be obtained as a resinified-wood-polyurethane foam by combined uses of a chemical reaction method and an open-mold-one-shot method. That is, after dissolving chemically modified wood such as allylated wood powders into polyhydric alcohols as 1,4-butanediol or bisphenol A with a concentration more than 50%, varying amounts of water and polyisocyanate compounds are added as a foaming agent and a hardener, respectively. When the mixed solution is allowed to stand at about 100゜C, foaming and resinification of the solution starts within 2 min. The products are wood-based polyurethane foams. The density of the foam takes values in the range … More of about 0.04 to 0.6 g/ <cm^3> , depending on blending composition of the raw materials. Even with the foam having the density of 0.04 g/ <cm^3> , a substantial strength and a restoring force for compression deformation can be furnished.In the advanced stage of this study, more prominent foams could be found to be obtainable from untreated-wood solutions. Wood chips and meals have found to be dissolved in polyhydric alcohols, polyethylene glycohol (PEG), bisphenols and so forth. Especially, the preparation of foams from the PEG solution has been systematically studied. The wood components and PEG in the solutions have first been reacted with propylene oxide or <epsilon> -caprolactone, introducing various lengths of side chains with a hydroxyl end group. Then, by adding foaming agents such as water and, freon, adjusting agents for foaming and polyisocyanate compounds, followed by heating, resinified wood foams with wide ranges of density could be obtained. The qualities of these foams are comparable to those of the corresponding commercial products. Less