【摘要】：超高分子量聚乙烯(UHMWPE)纖維具有優(yōu)良的耐沖擊、耐腐蝕性能,低密度以及高的拉伸強度等優(yōu)點。但是,由于纖維表面惰性而且光滑,纖維和基體之間差的粘附性能嚴(yán)重限制了UHMWPE纖維作為補強材料在復(fù)合材料領(lǐng)域中的應(yīng)用。本課題采用了紫外光接枝,在UHMWPE纖維表面接枝甲基丙烯酸縮水甘油酯,以此來改善了纖維和橡膠之間的粘合特性。本論文研究了纖維表面紫外光接枝的工藝條件。實驗探索了反應(yīng)容器、反應(yīng)溶劑、接枝反應(yīng)單體的濃度對于接枝反應(yīng)的影響。實驗通過紫外分光光度計發(fā)現(xiàn),實驗室中采用的試管對于360 nm的紫外光具有很好的透過性,可以用作紫外光接枝的反應(yīng)容器。實驗以水、丙酮、正庚烷,甲醇作為溶劑,采用傅立葉紅外變換(FTIR)來測試?yán)w維表面的化學(xué)組成,發(fā)現(xiàn)只有甲醇用作溶劑時,纖維表面出現(xiàn)碳基和環(huán)氧基團的特征峰。實驗進一步通過X射線光電子能譜(XPS),掃描電鏡(SEM)證明其纖維表面包覆了一層聚甲基丙烯酸縮水甘油酯。通過H抽出實驗表征纖維和橡膠之間的粘合特性,測試結(jié)果表明,改性后纖維和橡膠的最大抽出力達到39.7N,相對于未改性的纖維,提高了16%。本論文進一步探究了臭氧-紫外光接枝工藝。纖維預(yù)先經(jīng)過臭氧處理,在纖維表面引入含氧極性官能團,隨后纖維進行紫外光接枝。實驗探索了紫外輻照時間和單體濃度對于接枝的影響。實驗通過FTIR,XPS和SEM發(fā)現(xiàn),經(jīng)過臭氧-紫外光接枝的纖維表面包覆了一層均勻而且致密的甲基丙烯酸縮水甘油酯層。臭氧處理一方面刻蝕了纖維表面,提高了纖維的比表面積,另一方面引入了活性官能團,有利于接枝反應(yīng)的發(fā)生。H抽出力的實驗結(jié)果表明,經(jīng)過臭氧-紫外接枝的纖維橡膠的最大抽出力為61.0N,相對于未處理的纖維提高79%。論文進一步探究了亞鐵離子加入對于臭氧-紫外光接枝的影響。在接枝溶液中同時加入亞鐵離子和二苯甲酮,可以進一步提高纖維和橡膠粘合特性。H抽出實驗結(jié)果表明,該方法處理的纖維和橡膠的最大抽出力為83.7 N,提高了145%。
[Abstract]:UHMWPE (UHMWPE) fiber has excellent impact resistance, corrosion resistance, low density and high tensile strength. However, due to the inert and smooth surface of the fiber, the poor adhesion between fiber and matrix seriously limits the application of UHMWPE fiber as a reinforcing material in the field of composite materials. In this paper, glycidyl methacrylate was grafted on the surface of UHMWPE fiber by UV grafting to improve the adhesion between fiber and rubber. The technological conditions of UV grafting on fiber surface were studied in this paper. The effects of the concentration of reaction vessel, reaction solvent and graft monomer on the graft reaction were investigated. It was found by UV spectrophotometer that the test tube used in the laboratory had good transmittance to the UV light of 360 nm and could be used as a reaction container for UV grafting. Using water, acetone, n-heptane and methanol as solvents, FTIR (FTIR) was used to measure the chemical composition of fiber surface. It was found that when methanol was used as solvent, the characteristic peaks of carbon group and epoxy group appeared on the surface of fiber. The results of X-ray photoelectron spectroscopy (XPS) (XPS), scanning electron microscopy (SEM) showed that the fiber was coated with polyglycidyl methacrylate. The adhesion between the fiber and the rubber was characterized by H extraction experiment. The results showed that the maximum extractility of the modified fiber and rubber was 39.7 N, which was 16.7% higher than that of the unmodified fiber. In this paper, the ozone-UV grafting process was further explored. The fiber was pre-treated by ozone, and the oxygen polar functional group was introduced on the surface of the fiber, and then the fiber was grafted by ultraviolet light. The effects of UV irradiation time and monomer concentration on grafting were investigated. It was found by FTIR,XPS and SEM that a uniform and compact layer of glycidyl methacrylate was coated on the surface of the fiber grafted by ozone and ultraviolet light. On the one hand, ozone treatment etched the surface of fibers and improved the specific surface area of fibers. On the other hand, the introduction of active functional groups was beneficial to the occurrence of graft reaction. The maximum extractility of the fiber rubbers grafted by ozone and ultraviolet was 61.0 Ns, which was 79% higher than that of untreated fibers. The effect of ferrous ion addition on ozone-UV grafting was further investigated. The addition of ferrous ion and benzophenone into the graft solution can further improve the adhesion between the fiber and the rubber. The results of H extraction experiment show that the maximum extractility of the fiber and rubber treated by this method is 83.7 N, which increases 1455N.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ342.61;TB332

【引證文獻】

相關(guān)會議論文 前1條

1 張興魯;王耀先;朱丹;程樹軍;;超高分子量聚乙烯纖維增強復(fù)合材料研究進展[A];第十七屆玻璃鋼/復(fù)合材料學(xué)術(shù)年會論文集[C];2008年

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本文編號：2423504