CAJ | 학술논문

以杨木木粉为试样，进行不同时长的乙酰化处理，利用紫外光加速老化，探讨不同乙酰化度对木材耐光性能的影响，根据FTIR光谱分析试样化学组分特征吸收峰强度的变化规律，建立乙酰化处理时间与木材化学组分变化之间的关系。结果表明：UV辐射前，乙酰化木粉在1739cm-1处饱和酯化合物中CO和1385cm-1处乙酸酯基中C-H的特征吸收峰强度均大于原木粉，处理40min木粉的吸收峰强度最大，增重率最高，木粉的乙酰化效果显著；UV辐射后，乙酰化木粉在1504cm-1处木质素中苯环特征吸收峰强度明显大于原木粉，且乙酰化处理40min木粉的吸收峰强度最大，表明乙酰化处理能够有效抑制木材化学组分的光降解反应，提高木材的耐光老化性能，其中处理40min的效果最佳；SEM图片显示，乙酰化处理木粉的纤维状表面较原木粉更加均匀，材料粒径更小，乙酰化处理能有效提高木材的稳定性。
이양목목분위시양，진행불동시장적을선화처리，이용자외광가속노화，탐토불동을선화도대목재내광성능적영향，근거FTIR광보분석시양화학조분특정흡수봉강도적변화규률，건립을선화처리시간여목재화학조분변화지간적관계。결과표명：UV복사전，을선화목분재1739cm-1처포화지화합물중CO화1385cm-1처을산지기중C-H적특정흡수봉강도균대우원목분，처리40min목분적흡수봉강도최대，증중솔최고，목분적을선화효과현저；UV복사후，을선화목분재1504cm-1처목질소중분배특정흡수봉강도명현대우원목분，차을선화처리40min목분적흡수봉강도최대，표명을선화처리능구유효억제목재화학조분적광강해반응，제고목재적내광노화성능，기중처리40min적효과최가；SEM도편현시，을선화처리목분적섬유상표면교원목분경가균균，재료립경경소，을선화처리능유효제고목재적은정성。
The poplar powder was acetylated with different duration as sample ,processed ray radiation by using ultraviolet test box ,contrasting the influences to lightfastness of wood with different acetylation degree ,analyzing changing rules of characteris-tic peaks’ intensity which belonged to the chemistry components of samples based on FTIR spectra ,and the relationship between duration of acetylation and changes of chemistry components was established ,The results showed that :Before UV radiation ,the characteristic peaks’ intensity of acetylated poplar powder at 1 739 cm -1 which belonged to C O in saturated esters com-pounds and 1 385 cm -1 which belonged to C-H in acetate were higher than untreated ones’ ,the poplar powder with 40 min’s acetylation has the highest characteristic peaks’ intensity ,highest weight gain rate ,remarkable acetylation effect ;After UV ra-diation ,characteristic peaks’ intensity of Benzene at 1 504 cm-1 which belonged to lignin of poplar powder was obviously higher than untreated ones’ ,and characteristic peaks’ intensity of poplar powder with 40 min’s acetylation was the highest ,this showed that acetylation could effectively reduce the light degradation of wood chemistry components ,in order to improve the lightfastness ,especially the poplar powder with 40 min’s acetylation;SEM photos showed that ,the fibrous surface of acetylated poplar powder was more smooth and had more narrow particle size than untreated ones’ ,so acetylation can effectively improve the stability of wood .