超高分子量聚乙烯纤维的表面接枝及其与橡胶粘合性能的研究
发布时间：2019-02-15 15:51
【摘要】：超高分子量聚乙烯(UHMWPE)纤维具有优良的耐冲击、耐腐蚀性能,低密度以及高的拉伸强度等优点。但是,由于纤维表面惰性而且光滑,纤维和基体之间差的粘附性能严重限制了UHMWPE纤维作为补强材料在复合材料领域中的应用。本课题采用了紫外光接枝,在UHMWPE纤维表面接枝甲基丙烯酸缩水甘油酯,以此来改善了纤维和橡胶之间的粘合特性。本论文研究了纤维表面紫外光接枝的工艺条件。实验探索了反应容器、反应溶剂、接枝反应单体的浓度对于接枝反应的影响。实验通过紫外分光光度计发现,实验室中采用的试管对于360 nm的紫外光具有很好的透过性,可以用作紫外光接枝的反应容器。实验以水、丙酮、正庚烷,甲醇作为溶剂,采用傅立叶红外变换(FTIR)来测试纤维表面的化学组成,发现只有甲醇用作溶剂时,纤维表面出现碳基和环氧基团的特征峰。实验进一步通过X射线光电子能谱(XPS),扫描电镜(SEM)证明其纤维表面包覆了一层聚甲基丙烯酸缩水甘油酯。通过H抽出实验表征纤维和橡胶之间的粘合特性,测试结果表明,改性后纤维和橡胶的最大抽出力达到39.7N,相对于未改性的纤维,提高了16%。本论文进一步探究了臭氧-紫外光接枝工艺。纤维预先经过臭氧处理,在纤维表面引入含氧极性官能团,随后纤维进行紫外光接枝。实验探索了紫外辐照时间和单体浓度对于接枝的影响。实验通过FTIR,XPS和SEM发现,经过臭氧-紫外光接枝的纤维表面包覆了一层均匀而且致密的甲基丙烯酸缩水甘油酯层。臭氧处理一方面刻蚀了纤维表面,提高了纤维的比表面积,另一方面引入了活性官能团,有利于接枝反应的发生。H抽出力的实验结果表明,经过臭氧-紫外接枝的纤维橡胶的最大抽出力为61.0N,相对于未处理的纤维提高79%。论文进一步探究了亚铁离子加入对于臭氧-紫外光接枝的影响。在接枝溶液中同时加入亚铁离子和二苯甲酮,可以进一步提高纤维和橡胶粘合特性。H抽出实验结果表明,该方法处理的纤维和橡胶的最大抽出力为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.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ342.61;TB332
本文编号：2423504
[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.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ342.61;TB332
【引证文献】
相关会议论文 前1条
1 张兴鲁;王耀先;朱丹;程树军;;超高分子量聚乙烯纤维增强复合材料研究进展[A];第十七届玻璃钢/复合材料学术年会论文集[C];2008年
，本文编号：2423504
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