本文關鍵詞：人工林楊木增強—染色復合改性工藝研究　出處：《中國林業(yè)科學研究院》2017年碩士論文　論文類型：學位論文

  更多相關文章： 人工林楊木 增強-染色復合改性 制備工藝 性能

【摘要】：人工林楊木作為三大速生木材之一,資源非常豐富,但是其密度小、強度低、尺寸不穩(wěn)定、材色單調(diào)、花紋不清晰、裝飾性差,這些缺陷都大大限制了其應用范圍,所以有必要對人工林楊木進行改性處理,以提高其產(chǎn)品附加值和綜合利用水平。本論文以毛白楊(Populus tomentosa)為研究對象,以自制水溶性樹脂型增強改性劑(MUF)為主劑,研究了水溶性染料、溶液pH值和耐光助劑對復合染色改性材性能的影響,通過正交試驗優(yōu)化了樹脂型復合染色劑的制備及處理工藝,對復合染色材的物理力學、顏色和色牢度等性能進行了檢測和評價;并利用掃描電鏡(SEM)和傅立葉紅外光譜(FTIR)等儀器分析初步探討了樹脂型復合染色劑的增強改性機理與染色機制。主要結論如下:(1)通過單因素試驗考察不同pH值的樹脂溶液與不同染料的復配性狀及相應處理材性能,在所選8種染料中篩選出酸性大紅G為最佳復配染料,最佳溶液pH值為10。(2)通過單因素試驗考察多種單一和復合耐光助劑對復合染色材的增重率、顏色和色牢度等性能的影響,篩選出樹脂型復合染色劑的耐光助劑為UV-531和納米TiO_2復配。(3)以MUF樹脂濃度、染料濃度、耐光助劑濃度和樹脂固化溫度四個因素進行L_9(3~4)正交試驗,對樹脂型復合染色改性劑的調(diào)配及處理工藝進行優(yōu)化;以浸漬處理后人工林楊木的密度、增重率、顏色、耐水和耐光色牢度等性能為評價指標,對正交試驗結果進行極差與方差分析,綜合評定出復合染色改性劑的優(yōu)化工藝為:樹脂濃度為30%,染料濃度為1.5%,耐光助劑為0.5%濃度的納米TiO2和0.5%濃度的UV-531復配,樹脂固化溫度為100℃。(4)復合染色改性材的性能測試結果表明:與未處理材相比,復合染色改性材的密度提高46.15%,抗彎彈性模量(MOE)提高29.67%,抗彎強度(MOR)提高54.36%,抗脹率(ASE)超過70%;與純?nèi)旧南啾?復合染色改性材的顏色更為均勻,色澤更為明亮艷麗;復合染色改性材的耐水色牢度良好,但耐光色牢度有待進一步提高。(5)SEM觀察結果表明:復合染色改性劑具有良好的滲透性,能充分浸注到木材的細胞腔與細胞間隙中,復合染色改性材的導管內(nèi)及細胞壁表面均填充和覆蓋著大量樹脂。(6)FTIR分析結果表明:復合染色改性材與純樹脂增強改性材的譜圖形態(tài)基本一致,認為兩者的增強改性機理相同,主要是MUF樹脂的填充作用和與木材細胞壁物質的交聯(lián)鍵合反應使得木材的物理力學性能提高。
[Abstract]:Poplar wood as the three fast-growing wood, very rich in resources, but its low density, low strength and unstable size, color pattern is not clear, monotonous, poor ornamental, these defects have greatly limited its scope of application, so it is necessary to poplar wood was modified to. Increase the added value of their products and the level of comprehensive utilization. In this paper, Populus Tomentosa (Populus tomentosa) as the research object, using self-made water soluble resin reinforced modifier (MUF) as the main agent, the effects of water soluble dye, pH value of solution and light effect of additives on the dyeing performance of modified composite material. Through the preparation and treatment process of resin composite stain orthogonal test, physical mechanics of composite materials and dyeing, color fastness and other properties were tested and evaluated; and using scanning electron microscopy (SEM) and Fu Liye (FTIR) of infrared spectrum analysis instrument The resin composite stain modification mechanism and dyeing mechanism. The main conclusions are as follows: (1) the effects of different pH value of the resin solution and compound characters of different dyes and the corresponding material properties through single factor experiment, the selected 8 kinds of dyes were selected as the best combination of acid red G dye, the best solution the value of pH was 10. (2) were investigated by single factor test of single and compound additives on the composite material of the light staining rate of gain, effects of color and color fastness properties of the selected resin composite dye photostability agent for the compound of UV-531 and nano TiO_2. (3) with MUF resin concentration, dye concentration. Photostability agent concentration and curing temperature of resin four factors were L_9 (3~4) orthogonal test, the deployment and treatment process of resin composite dyeing modifying agent is optimized; with the density of impregnated artificial Lin wood, the weight gain rate, color, water resistance and impact resistance Colour fastness properties such as the evaluation index, analysis of range and variance of orthogonal test results, a comprehensive evaluation of the optimization process of composite dyeing modifying agent for resin concentration is 30%, the dye concentration was 1.5% UV-531 and 0.5% TiO2 nano additives for the light concentration of 0.5% concentrations of the compound, resin curing temperature is 100 degrees centigrade. (4) the performance test results of modified wood composite staining showed that: compared with the untreated wood, composite dyeing of modified wood density increased by 46.15%, modulus of elasticity (MOE) increased by 29.67%, the flexural strength increased by 54.36% (MOR), anti inflation (ASE) more than 70%; compared with the pure dyeing material. Composite dyeing of modified wood color is more uniform, the color is more bright; composite dyeing of modified wood color fastness is good, but the color fastness to light needs to be further improved. (5) the results of SEM showed that the composite dyeing modifying agent has good permeability, can fully impregnated to Interstitial cell and cell cavity in the wood, composite material modified catheter staining and cell wall surface were filled and covered with a lot of resin. (6) the results of FTIR analysis showed that the composite modified material and dyeing of pure resin reinforced modified material spectrum form is basically the same, that enhance the modification mechanism of both that is mainly the crosslinks filling effect of MUF resin and wood cell wall material reaction makes the physical and mechanical properties of wood.

【學位授予單位】：中國林業(yè)科學研究院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S781.7

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本文編號：1395382