CAJ | 학술논문

采用X射线衍射及气相色谱分析,研究未改性木材、碱处理木材及苯甲基化改性木材的结晶结构,以及它们在盐酸催化条件下在甲苯和四氢呋喃中的溶解性,并色质联用分析了苯甲基化木粉液化产物中上层溶液的组成.实验证明,较大体积苯甲基基团的引入显著地改变了木材的结晶结构,增大了自由体积,有利于溶剂分子渗透到木材基体内部,极大地提高了木粉的溶解性.随着增重率增加,溶液化产品的残余量下降而结合溶剂量上升,这表明了溶液化过程变得易于进行.此外,考察了影响苯甲基化木材溶液化的各种因素.实验结果表明,以甲苯为溶剂时,随着溶液化时间的延长以及催化剂用量的加大,苯甲基化木材的溶解性能显著提高,以四氢呋喃为溶剂存在着最佳的溶液化时间和催化剂用量.
채용X사선연사급기상색보분석,연구미개성목재、감처리목재급분갑기화개성목재적결정결구,이급타문재염산최화조건하재갑분화사경부남중적용해성,병색질련용분석료분갑기화목분액화산물중상층용액적조성.실험증명,교대체적분갑기기단적인입현저지개변료목재적결정결구,증대료자유체적,유리우용제분자삼투도목재기체내부,겁대지제고료목분적용해성.수착증중솔증가,용액화산품적잔여량하강이결합용제량상승,저표명료용액화과정변득역우진행.차외,고찰료영향분갑기화목재용액화적각충인소.실험결과표명,이갑분위용제시,수착용액화시간적연장이급최화제용량적가대,분갑기화목재적용해성능현저제고,이사경부남위용제존재착최가적용액화시간화최화제용량.
By means of X-ray and gas chromatography analysis, the crystalline structure of untreated wood , alkali treated wood and benzylated wood and their liquefaction in toluene and tetrahydrofufan with HCl as a catalyst were studied .The upper solution of benzylated wood was also studied by GC-MS analysis. It proved that the introduction of bulky benzyl group in wood significantly changed the crystalline structure of wood ,enlarging the free volume which facilitated the penetration of solvent into the matrix of treated wood, thus tremendously enhancing the solubility in solvent,compared to untreated wood and alkali treated wood. The percentage of residue decreased and the combined solvent increased with the increase of weight gain revealed that the liquefaction process became easy. Furthermore, the factors that influenced the liquefaction of benzylated wood were investigated. It showed that the liquefaction performance was improved with the increase of liquefaction time and the amount of catalyst when toluene was used as a solvent, especially in the presence of THF as solvent, there existed the optimum liquefaction time and the amount of catalyst .