Evaluation of formaldehyde emission of pine and wattle tannin-based adhesives by gas chromatography
Evaluation of formaldehyde emission of pine and wattle tannin-based adhesives by gas chromatography
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DOI：
10.1007/s00107-003-0441-2
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发表时间：
2004-04
期刊：
影响因子：
--
通讯作者：
Sumin Kim;Hyun-Joong Kim
中科院分区：
文献类型：
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作者：
Sumin Kim;Hyun-Joong Kim
采用穿孔法（DIN EN 120-欧洲标准化委员会1991）测定了用多聚甲醛、六亚甲基四胺和TN（三（羟基）硝基甲烷）固化剂与松木和荆树单宁基粘合剂粘合的木材刨花板的甲醛释放量。所有使用荆树皮单宁系统与三种不同的硬化剂制成的刨花板均满足E1级，而在松树单宁的情况下，仅使用六胺硬化剂导致满足E1级。这种趋势归因于固化剂的固化机制，单宁分子对甲醛的反应性和松树单宁对甲醛的快速反应性，由于其分子结构中包含间苯三酚A-环。六胺作为固化剂，可有效降低单宁基胶粘剂的甲醛释放量。作为一种更敏感和先进的方法，它也被使用。用于气相色谱分析的样品在穿孔器方法期间收集。从气相色谱法获得的甲醛释放量水平是类似的穿孔法获得的。
Formaldehyde emissions from wood particleboards bonded with pine and wattle tannin-based adhesives, using hardeners paraformaldehyde, hexamethylenetetramine and TN (tris (hydroxyl) nitromethan), were measured by the perforator method (DIN EN 120—European Committee For Standardization 1991). All particleboards made using the wattle tannin systems with the three different hardeners were satisfied grade E1, while in the case of pine tannin only the use of the hexamine hardener led to grade E1 being satisfied. This tendency was attributed to the curing mechanism of the hardener, the reactivity of the tannin molecule toward formaldehyde and the fast reactivity toward formaldehyde of pine tannin, due to the inclusion of phloroglucinolic A-rings within its molecular structure. Hexamine was effective at reducing formaldehyde emission in tanninbased adhesives when used as the hardener. Being a more sensitive and advanced method, it was also used. The samples used for gas chromatography were gathered during the perforator method. The formaldehyde emission levels obtained from gas chromatography were similar to those obtained from the perforator method.