本文選題：功能化二硫化鉬 + 可生物降解高分子復(fù)合材料�。� 參考：《安徽大學(xué)》2017年碩士論文

【摘要】：近幾年,二硫化鉬(MoS_2)由于其二維層狀結(jié)構(gòu)和量子尺寸效應(yīng),已逐漸引起了人們的興趣,在光催化、復(fù)合材料制備和污染物降解等領(lǐng)域應(yīng)用廣泛。但是由于原始的二硫化鉬為顆粒狀,層與層之間產(chǎn)生的堆積作用會(huì)限制它的應(yīng)用,因此需要對(duì)其改性。基于此,本文首先對(duì)塊狀的二硫化鉬進(jìn)行化學(xué)處理,利用液相剝離法制備出功能化的二硫化鉬納米片。再將其作為填料加入可生物降解高分子聚合物中,通過(guò)溶液共混法制備可生物降解高分子/功能化二硫化鉬復(fù)合材料,以提高可生物降解高分子的熱學(xué)性能和力學(xué)性能。論文的具體內(nèi)容如下:1.采用液相剝離法制備功能化的二硫化鉬(SA-MoS_2),通過(guò)超聲的方法在MoS_2表面粘附大量的羥基和羧基等親水性的官能團(tuán)。這些官能團(tuán)固定在MoS_2的表面,致使MoS_2層與層之間的堆積作用明顯減弱。通過(guò)TEM、XRD和拉曼等測(cè)試對(duì)材料的形貌和結(jié)構(gòu)進(jìn)行了表征,證明MoS_2已經(jīng)被剝離成片狀結(jié)構(gòu)且原有晶型并未改變。2.通過(guò)溶液共混法制備了海藻酸鈉/功能化二硫化鉬(SA/SA-MoS_2)復(fù)合材料。通過(guò)SEM、XRD和FT-IR等測(cè)試對(duì)材料的形貌和結(jié)構(gòu)進(jìn)行了表征。由于SA與SA-MoS_2具有良好的相容性,所成復(fù)合材料厚度均一,顏色具有規(guī)律性。通過(guò)DMTA、TGA測(cè)試,研究了 SA-MoS_2的添加量對(duì)SA/SA-MoS_2復(fù)合材料的熱力學(xué)性能的影響。結(jié)果表明,隨著SA-MoS_2含量的增加,SA/SA-MoS_2復(fù)合材料的儲(chǔ)能模量先增加后減小,其中填料的含量為0.5%時(shí),復(fù)合材料的力學(xué)性能提高的最明顯。熱學(xué)性能在SA-MoS_2的含量為1.0%時(shí)提高的最多。3.通過(guò)溶液共混法制備了聚乙烯醇/功能化二硫化鉬(PVA/SA-MoS_2)復(fù)合材料。通過(guò)SEM、XRD和FT-IR等測(cè)試對(duì)材料的形貌和結(jié)構(gòu)進(jìn)行了表征。由于PVA與SA-MoS_2具有良好的相容性,所成復(fù)合材料沒(méi)有出現(xiàn)宏觀(guān)相分離的現(xiàn)象。通過(guò)DMTA測(cè)試,發(fā)現(xiàn)SA-MoS_2的加入能提高PVA復(fù)合材料的力學(xué)性能,當(dāng)SA-MoS_2含量為0.2%時(shí),復(fù)合材料的儲(chǔ)能模量提高的最明顯。通過(guò)TGA測(cè)試,發(fā)現(xiàn)SA-MoS_2的加入對(duì)PVA復(fù)合材料的熱學(xué)性能也有一定的提高作用。4.采用液相剝離法對(duì)塊狀MoS_2進(jìn)行剝離,用木質(zhì)素(AL)作為溶劑制備出功能化的二硫化鉬(AL-MoS_2)。將制得的AL-MoS_2與羧甲基纖維素(CMC)通過(guò)溶液共混法制備成復(fù)合材料,調(diào)節(jié)填料的添加量得到不同比例的羧甲基纖維素/功能化二硫化鉬(CMC/AL-MoS_2)納米復(fù)合材料。通過(guò)DMTA、TGA測(cè)試,研究了 AL-MoS_2的添加對(duì)CMC/AL-MoS_2復(fù)合材料的熱力學(xué)性能的影響。結(jié)果表明,隨著AL-MoS_2含量的增加,CMC/AL-MoS_2復(fù)合材料的熱力學(xué)穩(wěn)定性逐漸增強(qiáng),在填料的含量為1.0%時(shí)達(dá)到最大值。
[Abstract]:In recent years, molybdenum disulfide (MoS _ 2) has attracted more and more attention due to its two-dimensional layered structure and quantum size effect. It has been widely used in the fields of photocatalysis, composite material preparation and pollutant degradation. However, because the original molybdenum disulfide is granular, the stacking effect between layers will limit its application, so it needs to be modified. Based on this, the bulk molybdenum disulfide was chemically treated and the functionalized molybdenum disulfide nanocrystals were prepared by liquid phase stripping method. The biodegradable polymer / functionalized molybdenum disulfide composites were prepared by solution blending in order to improve the thermal and mechanical properties of biodegradable polymers. The specific contents of the paper are as follows: 1. The functionalized molybdenum disulfide (SA-MoS _ 2) was prepared by liquid phase stripping method. A large number of hydrophilic functional groups such as hydroxyl and carboxyl groups were adhered to the surface of MoS _ 2 by ultrasonic method. These functional groups are fixed on the surface of Mos _ s _ 2, and the accumulation between the two layers is obviously weakened. The morphology and structure of the material were characterized by TEM XRD and Raman measurements. It was proved that MoS / Snap2 had been peeled into flake structure and the original crystal structure had not changed. 2. Sodium alginate / functionalized molybdenum disulfide (SA-SA-MoS2) composites were prepared by solution blending method. The morphology and structure of the materials were characterized by SEM XRD and FT-IR. Due to the good compatibility between SA and SA-MoS _ 2, the thickness of the composite is uniform and the color is regular. The effect of the addition of SA-MoS _ 2 on the thermodynamic properties of SA-MoS _ 2 composite was studied by DMTA-TGA test. The results show that with the increase of SA-MoS2 content, the energy storage modulus of SA-MoS2 / SA-MoS2 composite increases first and then decreases, and the mechanical properties of SA-MoS2 composites increase most obviously when the filler content is 0.5. The thermal properties of SA-MoS _ 2 increased as much as. 3 when the content of SA-MoS _ 2 was 1.0. Polyvinyl alcohol / functional molybdenum disulfide (PVA / SA-MoS2) composites were prepared by solution blending method. The morphology and structure of the materials were characterized by SEM XRD and FT-IR. Due to the good compatibility between PVA and SA-MoS _ 2, there is no macroscopic phase separation in the composite. Through DMTA test, it is found that the mechanical properties of PVA composites can be improved by adding SA-MoS _ 2. When the content of SA-MoS _ 2 is 0.2, the energy storage modulus of the composites increases most obviously. By TGA test, it is found that the addition of SA-MoS _ 2 can also improve the thermal properties of PVA composites. The bulk MoS _ 2 was peeled by liquid phase stripping method and the functionalized molybdenum disulfide (AL-MoS _ 2) was prepared by using lignin (AL) as solvent. AL-MoS _ 2 was prepared by solution blending with carboxymethyl cellulose (CMC). Different proportions of carboxymethyl cellulose / functionalized molybdenum disulfide (CMC / AL-MoS _ 2) nanocomposites were obtained by adjusting the content of filler. The effect of the addition of AL-MoS _ 2 on the thermodynamic properties of CMC / AL-MoS2 composite was studied by DMTA-TGA test. The results show that the thermodynamic stability of AL-MoS2 / AL-MoS2 composites increases with the increase of AL-MoS2 content, and reaches the maximum when the filler content is 1.0.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TQ136.12;TB383.1

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