Chemical changes of kenaf core binderless boards during hot pressing (II): effects on the binderless board properties
Chemical changes of kenaf core binderless boards during hot pressing (II): effects on the binderless board properties
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DOI：
10.1007/s10086-005-0744-5
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发表时间：
2006-06
影响因子：
2.9
通讯作者：
N. Okuda;K. Hori;Masatoshi Sato
中科院分区：
文献类型：
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作者：
N. Okuda;K. Hori;Masatoshi Sato
为了提供红麻芯无胶纸板自粘合的基本信息，我们在以前的研究中对无胶纸板进行了一系列的化学分析，并检查了它们在热压过程中的化学变化。在这项研究中，无粘结剂板制造的条件下，可能会加速假定的化学变化，以调查其对板性能的影响。首先，为了研究由羰基化合物形成的化学键对自结合的影响，研究了在板制造之前添加乙酸的影响，并且还检查了甲醇提取物（含有羰基化合物）的效果。其次，从板密度的角度讨论了木质素缩合反应的影响。最后，为了考察木质素热软化的影响，考察了温度条件、水分含量以及微波预处理对木质素热软化的影响。因此，估计的化学变化，建议影响无胶板的性能。
To provide basic information on self-bonding in kenaf core binderless boards, a series of chemical analyses was conducted on binderless boards and their chemical changes during hot pressing were examined in our previous study. In this study, binderless boards were manufactured under conditions that may accelerate the supposed chemical changes to investigate their effect on the board properties. First, to investigate the influence of the chemical bonds formed by carbonyl compounds on self-bonding, the influence of acetic acid addition prior to board manufacturing was studied and the effect of methanol extractives (containing the carbonyl compounds) was also examined. Second, the influence of the condensation reaction in lignin was discussed from the viewpoint of board density. Last, to examine the influence of thermal softening of lignin, the influences of temperature condition and moisture content, as well as those of microwave pretreatment, were investigated. As a result, the estimated chemical changes were suggested to influence the binderless board properties.