本文選題：木塑復(fù)合材料 + 有機(jī)顏料��； 參考：《福建農(nóng)林大學(xué)》2017年碩士論文

【摘要】：有機(jī)顏料是木塑復(fù)合材料(簡稱WPC)著色研究的主要著色劑之一,但有機(jī)顏料存在分散性差、耐候牢度不佳等問題,而對其進(jìn)行改性處理是解決此問題的重要手段之一。本文首先以聯(lián)苯胺黃G12(P.Y.12)為著色劑,研究茶梗粉、杉木粉以及竹粉3種木質(zhì)原料填充高密度聚乙烯(HDPE)復(fù)合材料的力學(xué)性能和著色性能,并分別以酞菁藍(lán)15:3(P.B.15:3)、P.Y.12、顏料紅48:2(P.R.48:2)對復(fù)合材料進(jìn)行著色處理,探討顏料種類及其添加量對復(fù)合材料彎曲性能和表觀顏色的影響;在此基礎(chǔ)上,分別采用溶膠-凝膠法制備的納米Si02及其與含氫硅油(PMHS)復(fù)合、硅鋁凝膠對P.Y.12進(jìn)行改性處理,通過FTIR、SEM觀察以及熱重分析表征其改性效果,同時采用改性顏料著色復(fù)合材料并進(jìn)行紫外加速老化試驗(yàn),探討顏料改性對材料彎曲性能、熱穩(wěn)定性、表觀顏色以及耐老化性能的影響。論文的主要結(jié)論如下:(1)茶梗粉、杉木粉與竹粉為填料分別與HDPE復(fù)合制備的WPC,其彎曲性能的大小次序?yàn)樯寄痉?HDPE復(fù)合材料竹粉/HDPE復(fù)合材料茶梗粉/HDPE復(fù)合材料,且材料的外觀顏色變化均較明顯;3種有機(jī)顏料(P.B.15:3、P.Y.12、P.R.48:3)分別著色杉木粉/HDPE復(fù)合材料后,總色差△E*隨顏料添加量的增加而增大;無論WPC是否著色處理,隨紫外老化時間延長,材料表面裂隙增加,彎曲性能降低,明度指數(shù)L*與△E*均增大;但與未著色材料相比,顏料加入后使WPC的彎曲性能略有提高,且材料的耐紫外老化性能較好。(2)對溶膠-凝膠法制備的納米SiO2及其與PMHS復(fù)合改性P.Y.12后的SEM觀察、粒徑測試及熱分析表明,納米SiO_2改性后顏料粒徑增大,且耐熱性能提高,但納米SiO2與PMHS復(fù)合改性后,粒徑較前者有所減小,改性使顏料的分散穩(wěn)定性能提高。(3)納米SiO2及其與PMHS復(fù)合改性的P.Y.12對WPC彎曲性能的影響較小,熱分析表明當(dāng)WPC中添加10%納米SiO2改性顏料時其熱穩(wěn)定性能有較明顯提高;紫外加速老化試驗(yàn)表明,添加10%納米SiO2及其與PMHS復(fù)合改性顏料使WPC老化后彎曲性能的變化最小;WPC的總色差△ E*的變化也均小于添加未改性的顏料,其中20%納米SiO2改性顏料對材料老化過程中顏色的穩(wěn)定效果最好。(4)采用研磨法用硅鋁凝膠對P.Y.12進(jìn)行改性后,顏料粒徑增大,但耐熱性能提高不明顯;改性顏料著色WPC后,其彎曲性能有所增大但變化總體較小,而WPC的L*、b*增加,其中經(jīng)6%與9%硅鋁凝膠改性后,b*分別較對照增加了 4.67%與5.63%;紫外加速老化試驗(yàn)表明,相同的老化時間內(nèi),硅鋁凝膠改性顏料使WPC彎曲性能的降低幅度及其△ E*的變化幅度基本上小于添加未改性的顏料,其中9%硅鋁凝膠改性顏料使WPC在老化期間△ E*的變化最小,對顏色的穩(wěn)定效果較好。
[Abstract]:Organic pigments are one of the main coloring agents for wood plastic composites (WPC), but organic pigments have some problems such as poor dispersion and poor weathering fastness. The modification of organic pigments is one of the important methods to solve this problem. In this paper, the mechanical properties and coloring properties of high density polyethylene (HDPE) composites filled with tea stalk powder, Chinese fir powder and bamboo powder were studied with benzidine yellow G12P P.Y.12 as colorant. The composite was colored with phthalocyanine blue 15: 3 P.B.15: 3 and pigment red 48: 2 P.R. 482, respectively. The effects of pigment type and its addition on the bending properties and apparent color of the composite were discussed. Nano-sized Si02 prepared by sol-gel method and its composite with hydrogen-containing silicone oil (PMHS) were used to modify P.Y.12. The modification effect was characterized by FTIR SEM observation and thermogravimetric analysis. The effects of pigment modification on the flexural properties, thermal stability, apparent color and aging resistance of pigments were investigated by using modified pigment coloring composites and UV accelerated aging test. The main conclusions of the paper are as follows: tea stalk powder, Chinese fir powder and bamboo powder were mixed with HDPE respectively. The order of bending properties of WPCs was as follows: Chinese fir powder / HDPE composite bamboo powder / HDPE composite tea stalk powder / HDPE composite. The total color difference (E *) of three organic pigments, P.B.15: 3 and P.Y.12P.R. 483, increased with the increase of pigment content, whether or not the pigments were colored or not, and the total color difference increased with the increase of UV aging time, whether or not the pigments were colored by P.B.15: 3 / P.Y.12P.R. 483 respectively, and the total color difference (E *) increased with the increase of the amount of pigments added. The surface cracks increased, the bending properties decreased, the luminance indices L * and E * increased, but compared with the uncolored materials, the flexural properties of WPC increased slightly after the addition of pigments. The ultraviolet-resistant aging property of the material was good. (2) the SEM observation of nanometer SiO2 prepared by sol-gel method and its composite modified P.Y.12 with PMHS, the particle size test and thermal analysis showed that the particle size and heat resistance of nano-SiO_2 modified pigment were increased. However, the particle size of nano-sized SiO2 and PMHS was smaller than that of the former, and the dispersion and stability of the pigment was improved by the modification. The effect of nano-SiO2 and P.Y.12 modified with PMHS on the flexural properties of WPC was less than that of Nano SiO2. Thermal analysis showed that the thermal stability of the modified pigment was obviously improved when 10% nanometer SiO2 was added to WPC, and the UV accelerated aging test showed that the thermal stability of the pigment was improved. The addition of 10% nano-sized SiO2 and its composite modified pigment with PMHS resulted in the smallest change in flexural properties of WPC after aging, and the change of total color difference E * of WPC was also smaller than that of unmodified pigment. Among them, 20% nano-sized SiO2 modified pigments have the best color stabilization effect during aging. 4) after modified P.Y.12 by grinding method, the particle size of the modified pigment increases, but the heat resistance is not improved obviously, and after the modified pigment is colored with WPC, the particle size of the modified pigment increases, and the heat resistance of the modified pigment is not improved obviously after the modified pigment is colored with WPC. The flexural properties of WPC were increased, but the overall change was small, while the content of WPC increased by 4.67% and 5.63% respectively after modified by 6% and 9% Si-Al gel, and the UV accelerated aging test showed that, in the same aging time, the UV accelerated aging test showed that after modified with 6% and 9% Si-Al gel, the flexural properties increased by 4.67% and 5.63%, respectively. Si-Al gel modified pigment can reduce the bending property of WPC and the change of E *, and the change of E * is smaller than that of unmodified pigment, among them, 9% Si-Al gel modified pigment makes the change of E* of WPC during aging to be the smallest. The stable effect on color is better.
【學(xué)位授予單位】：福建農(nóng)林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ616.8;TB332

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本文編號：1973018