Reduction of formaldehyde emission from plywood using composite resin composed of resorcinol-formaldehyde and urea-modified scallop shell nanoparticles
Reduction of formaldehyde emission from plywood using composite resin composed of resorcinol-formaldehyde and urea-modified scallop shell nanoparticles
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使用间苯二酚-甲醛和尿素改性扇贝壳纳米颗粒组成的复合树脂减少胶合板的甲醛排放
DOI：
10.1007/s00226-016-0868-3
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and Yoshikazu Kuga
中科院分区：
文献类型：
--
作者：
Shinya Yamanaka;Kohei Magara;Yasushi Hirabayashi;Toshiyuki Fujimoto;and Yoshikazu Kuga
仅在日本，每年就有20多万吨扇贝壳被丢弃。源自扇贝壳的纳米颗粒具有吸附气态甲醛的潜力;因此，现在已经通过将高比表面积的脲改性的壳纳米颗粒与间苯二酚-甲醛树脂混合来测试这种废弃的壳作为胶合板粘合剂中的添加剂填料。使用该程序，发现可以显著减少来自所得胶合板的甲醛排放。通过两种不同的方法制备尿素改性的扇贝贝壳纳米颗粒：（1）干法，其中在环境条件下通过行星式球磨处理贝壳-在添加表面改性的尿素溶液之后获得完全干燥的粉末;（2）湿法，通过在湿研磨过程中用尿素溶液处理干燥研磨的贝壳颗粒，然后离心以获得糊状物。通过两种处理获得的纳米颗粒的比表面积为42 ± 3 m2/g。随后的甲醛释放量的测量表明，添加改性的扇贝壳纳米粒子显着降低了胶合板的甲醛释放量。尿素的比质量吸收的减少取决于纳米颗粒，尤其是当使用含有通过湿法处理的纳米颗粒的树脂时。
More than 200,000 tons of scallop shells are disposed annually alone in Japan. Nanoparticles derived from scallop shells have the potential to adsorb gaseous formaldehyde; therefore, such discarded shells have now been tested as additive filler in plywood adhesive by mixing high specific surface area, urea-modified shell nanoparticles with a resorcinol–formaldehyde resin. With this procedure, it was found that the emission of formaldehyde from the resulting plywood could be substantially reduced. The urea-modified scallop shell nanoparticles were prepared by two different methods: (1) a dry method where the shells were treated by planetary ball-grinding under ambient conditions—a completely dried powder was obtained after addition of the surface-modifying urea solution; (2) a moist method by treating dry ground shell particles in a wet grinding process with the urea solution, followed by centrifugation to obtain a paste. The specific surface area of the nanoparticles obtained by both treatments was 42 ± 3 m2/g. Measurement of the subsequent formaldehyde emission showed that the addition of the modified scallop shell nanoparticles substantially reduced the formaldehyde emission from plywood. The reduction of the specific mass uptake of urea depends on the nanoparticles which especially was the case when resins containing nanoparticles processed by the moist method were used.