CAJ | 학술논문

考察了纳米尺寸的KH颗粒在不同温度热处理后比表面积的变化及其与化学反应活性之间的关系.纳米KH热处理后,比表面积随着热处理温度升高而减小,但单位表面的化学反应活性却增大.表明热处理改变了KH表面的状态,说明大的比表面积是构成纳米KH高活性的一个主要原因,而具有高表面能的表面也是高活性的一个重要因素.纳米KH具有使苯乙烯快速聚合的催化作用.
고찰료납미척촌적KH과립재불동온도열처리후비표면적적변화급기여화학반응활성지간적관계.납미KH열처리후,비표면적수착열처리온도승고이감소,단단위표면적화학반응활성각증대.표명열처리개변료KH표면적상태,설명대적비표면적시구성납미KH고활성적일개주요원인,이구유고표면능적표면야시고활성적일개중요인소.납미KH구유사분을희쾌속취합적최화작용.
The variation of specific surface area and chemical reactivity of nanoKH particles treated at different temperatures has been studied. The BET surf ace area of nano-KH decreases with the increase of heat treatment temperature, while the chemical reactivity per unit surface increases steadily. These result s indicate that the state of KH surface is changed after heat treatment. Large s pecific surface area of nano-KH is a major factor for its high chemical reacti vity, nevertheless, the surface in an activated state with high surface energy I s also an important factor for its high chemical reactivity. Nano-KH alone can polymerize styrene rapidly with the formation of polystyrene.