本文選題：木材陶瓷　切入點(diǎn)：層狀結(jié)構(gòu)　出處：《中南林業(yè)科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本研究以松木粉炭粉和液化木材為基材,通過(guò)熱壓成型制備單層木材陶瓷預(yù)制件,在氮?dú)鈿夥毡Ｗo(hù)下高溫?zé)Y(jié)制備片狀木材陶瓷基體材料,然后使用環(huán)氧樹(shù)脂將基體材料與碳纖維疊加膠合制備碳纖維增強(qiáng)層狀木材陶瓷。研究發(fā)現(xiàn),炭粉／液化木材質(zhì)量比和燒結(jié)溫度扮演著重要的角色,其對(duì)基體材料的基本性能有較大影響：隨著炭粉／液化木材質(zhì)量比的增加,碳得率增加,體積收縮率降低,同時(shí)表觀密度也隨之增加。但隨著燒結(jié)溫度的持續(xù)增加,碳得率和表觀密度有降低的趨勢(shì)。通過(guò)響應(yīng)面法對(duì)基體材料的制備工藝進(jìn)行優(yōu)化發(fā)現(xiàn)：當(dāng)燒結(jié)前密度、原料配比、燒結(jié)溫度分別為1.1g/cm3、1:0.8和1100℃時(shí)所獲得的基體材料具有較高的成品率和較好的抗彎強(qiáng)度。同時(shí),建立了響應(yīng)面優(yōu)化模型：Y=7.89+0.42A+0.85B+0.69C+0.54BC-0.54A2-1.4B2-0.89C2。FTIR和XRD分析顯示原料配比對(duì)基體材料的物相構(gòu)成影響較小,但隨著燒結(jié)溫度升高,O和H等元素被逐步脫除,且較高的燒結(jié)溫度有利于提高基體材料的石墨化程度；SEM觀測(cè)發(fā)現(xiàn)基體材料能夠部分保留木材原有的結(jié)構(gòu)特征,增強(qiáng)型層狀木材陶瓷的層狀結(jié)構(gòu)清晰,且在斷裂過(guò)程中裂紋多在層間偏轉(zhuǎn)。碳纖維增強(qiáng)層狀結(jié)構(gòu)木材陶瓷的力學(xué)性能隨著燒結(jié)溫度的升高而增加,但當(dāng)燒結(jié)溫度超過(guò)1100℃和原料配比超過(guò)1:0.75后,力學(xué)性能增加幅度表現(xiàn)為逐漸減緩。同時(shí),與用傳統(tǒng)方法制備的木材陶瓷相比,增強(qiáng)型木材陶瓷在力學(xué)性能方面提高顯著：抗彎載荷由普通木材陶瓷的0.74MPa增至5.13MPa,提高了6.93倍；壓縮載荷提高了10倍。同時(shí),由于層狀結(jié)構(gòu)的存在和增強(qiáng)碳纖維的使用,使得斷裂韌性遠(yuǎn)高于普通木材陶瓷,在本實(shí)驗(yàn)條件下提高了10倍左右。通過(guò)選擇膠合壓力、碳纖維型號(hào)、碳纖維分布角度為參考因素,設(shè)計(jì)正交試驗(yàn),得到最佳制備方案為膠合壓力為2.5MPa、碳纖維型號(hào)為3K、碳纖維分布角度0°。本研究通過(guò)利用液化木材代替了傳統(tǒng)熱固性樹(shù)脂而起到了環(huán)保和節(jié)約資源的效果,同時(shí)采用碳纖維和層狀結(jié)構(gòu)對(duì)木材陶瓷進(jìn)行增強(qiáng),使其力學(xué)性能得到有效的提高,尤其是斷裂韌性得到了較大的改善。
[Abstract]:In this study, the pine powder carbon powder and liquefied wood base, single wood ceramic preform by hot press molding, under the protective atmosphere of nitrogen preparing flake wood ceramic matrix material high temperature sintering, then the matrix material and carbon fiber overlay glue preparation of carbon fiber reinforced laminated wood ceramic epoxy resin. The study found that / the quality of liquefied wood charcoal powder ratio and sintering temperature plays an important role, has a great influence on the basic performance of the matrix material with the increase of liquefied wood quality / carbon powder ratio, carbon yield increased, the volume shrinkage decreased, while the apparent density is also increased. But with the sintering temperature increasing. The carbon yield and apparent density decreased. That optimized by response surface method preparation of matrix material: when before sintering density, the ratio of raw materials, sintering temperature were 1.1g/ cm3,1:0.8 And get the 1100 C matrix material with high yield and good bending strength. At the same time, a response surface optimization model: Y=7.89+0.42A+0.85B+0.69C+0.54BC-0.54A2-1.4B2-0.89C2.FTIR and XRD analysis showed that the ratio of raw materials on the matrix material phase constitutes a small effect, but with the increase of sintering temperature, O and H elements are gradually removed, sintering the high temperature and is conducive to improve the degree of graphitization of matrix material; SEM observation found that the matrix material can retain the original features of wood structure, reinforced layered junction type laminated woodceramics clear structure, and the crack in the fracture process in multi layer deflection. Carbon fiber reinforced mechanical properties of layered structure of wood ceramics increases with the the increase of sintering temperature, but when the sintering temperature is higher than 1100 DEG C and the molar ratio of more than 1:0.75, the mechanical properties of the increase is gradually reduced Slow. At the same time, compared with wood ceramics prepared by traditional methods, enhanced wood ceramics significantly improved the mechanical properties of flexural load by ordinary wood ceramics 0.74MPa to 5.13MPa, increased by 6.93 times; the compressive load is increased by 10 times. At the same time, due to the layered structure of existence and enhance the use of carbon fiber. The fracture toughness is higher than that of normal wood ceramics, under the experimental condition is improved by about 10 times. By selecting the bonding pressure, carbon fiber types, carbon fiber distribution point as reference factors, orthogonal design, the optimal preparation scheme for bonding pressure 2.5MPa, carbon fiber type 3K, carbon fiber distribution angle of 0 deg. this study. Through the use of liquefied wood instead of the traditional thermosetting resin to environmental protection and resource conservation effect, at the same time using carbon fiber and layered structure to enhance the mechanical properties of wood ceramics. The effective improvement, especially the fracture toughness, has been greatly improved.

【學(xué)位授予單位】：中南林業(yè)科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ174.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 張建;陳志林;周建斌;傅峰;;竹炭基SiC陶瓷材料的顯微結(jié)構(gòu)及能譜分析[J];材料工程;2009年S1期

2 陳志林;傅峰;王群;左鐵鏞;;甲基三乙氧基硅烷改性溶膠制備陶瓷化木材的性能[J];復(fù)合材料學(xué)報(bào);2009年03期

3 王萍;程曉農(nóng);嚴(yán)學(xué)華;周峰;;木粉/環(huán)氧樹(shù)脂木材陶瓷的制備與研究[J];硅酸鹽通報(bào);2008年01期

4 范強(qiáng),劉炎軍,尹洪峰;層狀陶瓷Ti_3SiC_2的研究現(xiàn)狀[J];耐火材料;2003年01期

5 李冬云,喬冠軍,金志浩;層狀復(fù)合陶瓷材料的研究進(jìn)展[J];無(wú)機(jī)材料學(xué)報(bào);2002年01期

6 錢軍民,金志浩,喬冠軍;木材陶瓷研究進(jìn)展[J];無(wú)機(jī)材料學(xué)報(bào);2003年04期

7 馬榮,喬冠軍,金志浩;木材陶瓷的制備與性能研究[J];西安交通大學(xué)學(xué)報(bào);1998年08期

8 蔡艷芝;尹洪峰;;SiC多孔陶瓷的仿生合成[J];宇航材料工藝;2013年02期

相關(guān)博士學(xué)位論文 前1條

1 陶毓博;木質(zhì)材料/酚醛樹(shù)脂燒結(jié)制造網(wǎng)絡(luò)形態(tài)木陶瓷的研究[D];東北林業(yè)大學(xué);2006年

相關(guān)碩士學(xué)位論文 前3條

1 毛帥;杉木苯酚液化殘?jiān)慕Y(jié)構(gòu)表征與分形分析[D];北京林業(yè)大學(xué);2011年

2 高永勝;殼聚糖/陶瓷層狀復(fù)合材料的制備與表征[D];哈爾濱工業(yè)大學(xué);2013年

3 陳銘浩;木陶瓷表面孔隙結(jié)構(gòu)及其對(duì)摩擦性能影響研究[D];中南林業(yè)科技大學(xué);2014年

，

本文編號(hào)：1646820