炭化条件对竹原纤维炭孔隙结构的影响分析

Analysis of the Effect of Carbonization Conditions on Bamboo Fiber Charcoal Pore Structure

为研究炭化竹原纤维的特性,进一步提升竹原纤维的使用性能,拓宽竹原纤维的应用领域,采用可控电炉制备了不同炭化温度和不同保温时间条件下的炭化竹原纤维,利用全自动比表面积及孔隙度分析仪测试了炭化竹原纤维的比表面积、比孔容及平均孔径,探讨了炭化条件对其性能的影响。结果表明:随炭化温度的升高和保温时间的延长,炭化竹原纤维的比表面积、比孔容和孔径分布先增大后减小,在较优的工艺条件下,炭化竹原纤维的比表面积和比孔容最大值分别可达819.35m2/g和0.7358cm3/g,平均孔径最小可达2.0836nm。

In order to study the characteristics of carbonized natural bamboo fibers and improve properties and broaden application fields of natural bamboo fibers, electric furnace was used to produce carbonized natural bamboo fibers at different carbonization temperatures and soaking times, and accelerated surface area and porosimetry system was used to measure their pore structure. Then the effect of carbonization temperature and soaking time on specific area, specific pore volume and mean diameter of carbonized fibers was discussed. The results showed that specific area, specific pore volume and mean diameter increased firstly and then decreased with the rise of carbonization temperature and soaking time. Under superior processing conditions, the highest values of specific area and specific pore volume were 819.35 m2/g and 0.7 358 cm3/g respectively and the lowest value of mean diameter was 2.0 836 nm.