本文選題：稀土鋁酸鍶 + 再生纖維素纖維　； 參考：《江南大學(xué)》2017年碩士論文

【摘要】：稀土鋁酸鍶(SrAl_2O_4:Eu~(2+),Dy~(3+))長(zhǎng)余輝發(fā)光材料因其一定的化學(xué)穩(wěn)定性、發(fā)光效果優(yōu)異而被應(yīng)用于眾多行業(yè)。其中,長(zhǎng)余輝發(fā)光纖維是本課題組研發(fā)的,以成纖高聚物(如聚對(duì)苯二甲酸乙二醇酯、聚酰胺等)為基材,通過添加SrAl_2O_4:Eu~(2+),Dy~(3+)制備的一種具有自主知識(shí)產(chǎn)權(quán)的新型功能性纖維。當(dāng)前,制備長(zhǎng)余輝發(fā)光纖維主要以熔融紡絲法為主,而溶液紡絲法制備的長(zhǎng)余輝發(fā)光纖維較少,這是由于SrAl_2O_4:Eu~(2+),Dy~(3+)材料耐水解性差,限定了長(zhǎng)余輝發(fā)光纖維的制備方法。本文意在采用溶液紡絲法制備一種長(zhǎng)余輝發(fā)光再生纖維素纖維,首先對(duì)SrAl_2O_4:Eu~(2+),Dy~(3+)材料進(jìn)行硅烷偶聯(lián)劑KH570包覆處理,然后以再生纖維素為基材,利用溶液紡絲方法制備而成,并對(duì)其性能進(jìn)行研究。具體內(nèi)容如下:首先,采用硅烷偶聯(lián)劑KH570對(duì)SrAl_2O_4:Eu~(2+),Dy~(3+)進(jìn)行改性處理以增加稀土鋁酸鍶發(fā)光材料在水性溶液中的穩(wěn)定性。通過掃描電子顯微鏡觀察改性處理的粉末表面形貌,采用傅里葉紅外光譜儀對(duì)偶聯(lián)劑化學(xué)鍵連接進(jìn)行測(cè)試,采用熱重分析儀測(cè)試接枝在粉末表面的偶聯(lián)劑含量,并對(duì)改性處理的粉末的光學(xué)性能進(jìn)行表征,實(shí)驗(yàn)結(jié)果顯示:激發(fā)發(fā)射光譜表明包覆前后粉末的激發(fā)發(fā)射峰保持不變,這就表明偶聯(lián)劑的加入沒有損害粉末的物相結(jié)構(gòu);余輝測(cè)試表明包覆層對(duì)發(fā)光亮度的影響較小;耐水性測(cè)試表明,改性后的粉末可以在水中保持兩個(gè)小時(shí)不變質(zhì)。其次,以包覆處理的粉末為添加劑,采用低溫處理后的堿/尿素/硫脲/水體系溶解的棉漿粕為基材,與添加劑進(jìn)行物理共混,制得紡絲液。采用注射式溶液紡絲設(shè)備制備了長(zhǎng)余輝發(fā)光再生纖維素纖維。通過制備不同長(zhǎng)余輝發(fā)光粉末含量的纖維及未包覆粉末的纖維,研究不同長(zhǎng)余輝粉末含量對(duì)纖維性能的影響及偶聯(lián)劑對(duì)纖維的影響。結(jié)果表明,隨著長(zhǎng)余輝發(fā)光粉含量的增加,纖維的外觀出現(xiàn)突起和裂縫,形貌變差;力學(xué)性能隨著粉末含量增加而降低;激發(fā)發(fā)射光譜及余輝測(cè)試表明隨著粉末含量的增加,發(fā)光強(qiáng)度增加,但是超過10%時(shí),增加幅度較小。另外,通過對(duì)比未包覆粉末的纖維,表明偶聯(lián)劑在纖維中的作用不僅保護(hù)了發(fā)光粉,也增加了纖維力學(xué)強(qiáng)度。此外,當(dāng)前已經(jīng)制備出的長(zhǎng)余輝發(fā)光纖維主要是發(fā)黃綠色光,發(fā)光光色較為單一。為了豐富纖維的發(fā)光光色,以光致變色微膠囊和經(jīng)處理的稀土鋁酸鍶為添加材料,采用溶液紡絲法制備出多元光色的長(zhǎng)余輝發(fā)光再生纖維素纖維,并對(duì)纖維的外觀形貌、光學(xué)性能進(jìn)行了研究,發(fā)現(xiàn)經(jīng)紫外線激發(fā)后,多元光色的纖維發(fā)射光譜藍(lán)移,在黑暗時(shí),相對(duì)普通長(zhǎng)余輝發(fā)光纖維的黃綠光其發(fā)色呈綠色。
[Abstract]:Rare earth strontium aluminate (SrAl2O2) SrAl2O2) long afterglow materials have been used in many industries because of their chemical stability and excellent luminescence effect. Among them, long afterglow fiber was developed by our group. A new functional fiber with independent intellectual property rights was prepared by adding SrAl2O4: Eustane 2 + Dy3 with fiber forming polymer (such as polyethylene terephthalate, polyamide, etc.) as substrate. At present, the long afterglow fibers are mainly prepared by melt spinning, but few by solution spinning. This is due to the poor hydrolysis resistance of SrAl2O4: EUG / Dy (3) materials, which limits the preparation method of long afterglow fibers. The aim of this paper is to prepare a long-afterglow regenerated cellulose fiber by solution spinning method. Firstly, SrAl2O4: Euf2 / Dy (Dy) 3) material is coated with silane coupling agent KH 570, and then the regenerated cellulose is prepared by solution spinning method. And its performance was studied. The main contents are as follows: firstly, SrAl2O4: Eu2 + Dy3) was modified by silane coupling agent KH 570 to improve the stability of rare earth strontium aluminate luminescent materials in aqueous solution. The surface morphology of the modified powder was observed by scanning electron microscope (SEM). The chemical bond bonding of the coupling agent was tested by Fourier transform infrared spectroscopy (FTIR) and the content of the coupling agent grafted on the powder surface was measured by thermogravimetric analysis. The optical properties of the modified powder were characterized. The experimental results showed that the excitation emission peak of the powder remained unchanged before and after coating, which indicated that the addition of coupling agent did not damage the phase structure of the powder. The results of afterglow test showed that the coating had little effect on luminescence brightness, and the water resistance test showed that the modified powder could remain unchanged in water for two hours. Secondly, using coated powder as additive and cotton pulp dissolved in alkali / urea / thiourea / water system as substrate after low temperature treatment, the spinning solution was prepared by physical blending with additive. Long afterglow regenerated cellulose fibers were prepared by injection solution spinning equipment. The effect of the content of long afterglow powder on fiber properties and the effect of coupling agent on fiber were studied by preparing fibers with different content of long afterglow powder and uncoated powder. The results showed that with the increase of the content of long afterglow powder, the appearance of the fiber appeared protuberance and crack, the morphology became worse, the mechanical properties decreased with the increase of powder content, the excitation emission spectrum and the afterglow test showed that the appearance of the fiber increased with the increase of powder content. The luminous intensity increases, but when it exceeds 10, the increase is small. In addition, by comparing the uncoated fibers, it is shown that the coupling agent not only protects the luminescent powder, but also increases the mechanical strength of the fiber. In addition, the long-lasting phosphorescent fiber is mainly yellowish green and has a single luminous color. In order to enrich the luminous color of the fiber, the multicomponent light-colored long-afterglow regenerated cellulose fiber was prepared by solution spinning with photochromic microcapsule and rare earth strontium aluminate as the additive material, and the appearance and morphology of the fiber were investigated. The optical properties were studied. It was found that the emission spectra of the multicomponent light-colored fibers were blue shifted after UV excitation. In the dark, the yellowish green light of the multicomponent light-colored fibers was green compared with that of the ordinary long-afterglow fibers.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ352.79;TQ422

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