CAJ | 학술논문

研究了柚木光变色的经时变化，同时利用红外光谱比较了新剖材与太阳光照稳定材抽提物化学成分的差异，分析了柚木光变色的原因。结果表明：经太阳光和紫外光照射后，柚木的明度随时间的延长呈逐渐减小直至稳定的变化趋势，红绿轴色品指数、黄蓝轴色品指数和色差则均呈逐渐增大直至稳定的变化趋势。三种光照条件下，柚木明度值变化缓慢，太阳光照射下12 h、18 W紫外光照射下30 h、36 W紫外光照射下18 h后基本达到稳定；而红绿轴色品指数和黄蓝轴色品指数变化较快，12 h时基本都达到稳定状态；色差达到稳定的时间分别为太阳光照射下12 h、18 W紫外光照射下30 h、36 W紫外光照射下18 h。红外光谱分析表明，引起柚木变色除了木质素外，还有抽提物中不饱和烃类的C=C和芳香烃类的C-H、C=C发生了断裂，并生成了发色集团醌类的羰基C=O。
연구료유목광변색적경시변화，동시이용홍외광보비교료신부재여태양광조은정재추제물화학성분적차이，분석료유목광변색적원인。결과표명：경태양광화자외광조사후，유목적명도수시간적연장정축점감소직지은정적변화추세，홍록축색품지수、황람축색품지수화색차칙균정축점증대직지은정적변화추세。삼충광조조건하，유목명도치변화완만，태양광조사하12 h、18 W자외광조사하30 h、36 W자외광조사하18 h후기본체도은정；이홍록축색품지수화황람축색품지수변화교쾌，12 h시기본도체도은정상태；색차체도은정적시간분별위태양광조사하12 h、18 W자외광조사하30 h、36 W자외광조사하18 h。홍외광보분석표명，인기유목변색제료목질소외，환유추제물중불포화경류적C=C화방향경류적C-H、C=C발생료단렬，병생성료발색집단곤류적탄기C=O。
Time changes of teak light-induced discoloration is studied,and at the same time,infrared spectrum is adopted to compare the chemical composition difference between new cut materials and extracts from wood under stable sunlight to ana-lyze the cause of teak light-induced discoloration. The result shows that after sunlight and ultraviolet ray illumination,teak lightness shows a gradually decreasing till steady trend with the increase in time. Teak lightness value changes slowly in three kinds of illumination,12 h,18 W in the sunlight,30 h,36 W in the ultraviolet irradiation and 18 h in ultraviolet irradiation, followed by basic stability;while red-green-axis color index and the yellow-blue-axis color index change fast,basically reaching stability after 12 hours;the time required for color difference to reach stability is 12 h,18 W in the sunlight,30 h, 36 W in the ultraviolet irradiation and 18 h in ultraviolet irradiation. The infrared spectrum analysis indicates that besides lignin that causes teak color deterioration,the unsaturated hydrocarbon C=C and fragrant hydrocarbon compound C-H,C=C in the extract break,generating the carbonyl C=O of quinones in the chromophoric group.