共查询到20条相似文献,搜索用时 140 毫秒
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《粘接》2021,45(2)
生物材料中聚醚醚酮的性能优异,但是该材料的粘接性能较差,所以在口腔医学领域中的发展受到了一定的限制。文章通过使用氮气低温等离子对该生物材料进行处理,目的在于提高材料的粘接性能。于是制作生物材料试样,对其进行氮气低温等离子处理0min、15min、25min、35min。然后对不同的试样进行扫描电镜观察、X线光电子能谱分析、接触角分析、剪切强度和截面破坏模式分析。研究结果表明,经过氮气低温等离子处理之后的生物材料中引进了氮元素;粘接性能相比于没有进行等离子处理的试样,处理之后的试样明显提高了材料的粘接性能,并且等离子处理25min之后的生物材料,其粘接性能更好。 相似文献
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采用低温等离子体对热硫化型硅橡胶表面进行处理,研究了介质气体、处理时间以及存放时间对硅橡胶表面化学状态,以及硅橡胶与端羟基聚丁二烯聚氨酯(HTPBPU)胶粘剂界面粘接性能的影响。研究结果表明,经等离子体处理后的硅橡胶表面有新官能团生成,与聚氨酯胶粘剂的界面粘接性能得到显著提升;介质气体的类型、处理时间和存放时间的长短对界面粘接性能影响不大。 相似文献
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《硅酸盐学报》2016,(5)
为了改善纤维与水泥之间的界面粘接效果,采用低温等离子处理对碳纤维表面进行改性,将改性后掺量为0.2%(质量分数)的碳纤维加入到水泥基体中,通过抗折性能测试、渗透性实验和微观形貌观察,研究碳纤维对水泥基体性能影响和纤维与水泥基体粘接情况。结果表明:经等离子处理60 s后,碳纤维氮吸附能力显著增强,氮吸附值达到50 m~2/kg。红外光谱羰基吸收峰显著增强,表明碳纤维表面形成了羰基。X射线光电子能谱分析也证实了碳纤维表面羰基的存在。三轴测试表明改性后水泥石韧性提高。孔径测试显示掺入等离子改性碳纤维后水泥石内部孔径变小,结构密实。SEM观察发现等离子改性后,碳纤维与水泥基界面粘接作用加强。 相似文献
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《高科技纤维与应用》2016,(6)
通过红外测试及不同相对湿度下的实验对比,确定了芳纶(对位芳纶)压板无纬布纤维脱粘问题的影响因素。对树脂进行共混改性实验,改善了树脂与纤维的界面相容性,增强了树脂对纤维的粘接性能,并确定改性剂最佳质量分数为26%;为改善树脂对相对湿度的敏感性,对溶剂进行了相应调整;解决了织布过程中脱粘问题,提高了压板无纬布产品的质量。 相似文献
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表面处理对硅橡胶胶粘剂胶接性能的影响 总被引:9,自引:0,他引:9
本文着重研究了不同表面处理条件下硅橡胶胶粘剂的粘接性能。有机硅烷偶联剂对提高硅橡胶胶粘剂的粘接性能有显著效果,其中以GPJ-43的处理效果为最佳。铝合金试样机械打磨后采用不同溶剂清洗对粘接性能也有影响,其中以三氯乙烯的效果为最好。磷酸阳极化是很有效的表现处理方法。对铝-铝粘接界面的分析发现,硅橡胶胶粘剂粘接接头的破坏一般为胶粘剂的内聚破坏或胶粘剂与偶联剂界面的粘附破坏。 相似文献
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简介了连续玄武岩纤维的性能与应用,重点阐述了偶联剂处理法、酸碱处理法、表面涂层法和低温等离子处理法4种常用的对连续玄武岩纤维改性研究方法的研究情况。表明无论采用偶联剂、酸碱、表面涂层和低温等离子处理法,都能有效改善纤维的表面性能,提高纤维与其它材质间的粘接性。指出对连续玄武岩纤维界面性质的基础研究深度不够,是限制连续玄武岩纤维界面改性方法开发和完善的主要原因。 相似文献
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空气等离子体处理芳纶纤维及其与天然橡胶/乳聚丁苯橡胶的黏合性能 总被引:2,自引:0,他引:2
考察了空气等离子体处理对芳纶纤维表面结构形态的影响,研究了空气等离子体和间苯二酚-甲醛-胶乳(RFL)浸胶处理芳纶纤维与天然橡胶(NR)/乳聚丁苯橡胶(ESBR)的黏合性能,并对经处理的芳纶纤维与NR/ESBR体系的界面层作了动态力学分析。结果表明,芳纶纤维经空气等离子体处理后,表面粗糙度增大,表面积增加,结晶度减小,但处理功率过大、处理时间过长时,芳纶纤维的表面又变得比较光滑、结晶度又呈增大趋势。随着等离子体处理时间的延长,芳纶纤维与NR/ESBR的黏合性能增强,但处理时间过长时,芳纶纤维与NR/ESBR的黏合性能下降;等离子体处理芳纶纤维经RFL进一步浸胶处理后,芳纶纤维与NR/ESBR的黏合性能大幅度提高。芳纶纤维与NR/ESBR的界面存在介于高模量芳纶纤维和低模量橡胶之间的过渡层。 相似文献
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研究硅橡胶与聚酰亚胺纤维织物、聚酰胺纤维织物、聚酯纤维织物、玻璃纤维织物、聚四氟乙烯及金属等骨架材料的粘合性能。偶联剂VTPS、开姆洛克608、偶联剂KH-550/A-151并用体系和偶联剂A-151/间苯二酚并用体系是硅橡胶与骨架材料的良好粘合剂,能有效提高硅橡胶与聚酰胺纤维织物、聚酯纤维织物、玻璃纤维织物、聚四氟乙烯、不锈钢和铝合金的粘合强度。在骨架材料表面处理胶浆中,粘合剂含量为10%,硅橡胶与骨架材料的粘合强度较高,粘合剂增粘效果较佳。聚酰亚胺纤维类织物与硅橡胶的粘合性能很差,只有使用开姆洛克608作表面处理胶浆粘合剂,聚酰亚胺纤维织物与硅橡胶才可获得良好的粘合性能。 相似文献
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《Journal of Adhesion Science and Technology》2013,27(2):279-291
To improve the adhesion between poly(p-phenylene terephthalamide), PPTA, fiber and silicone rubber, the surface modification of PPTA was investigated. Combining plasma treatment and coupling agent treatment with the silicone adhesive was found to be effective in improving adhesion. The combination process made the pull-out force of the PPTA yarn/silicone rubber composite 2.5 times higher, compared with the plasma treatment or the coupling agent treatment alone. The plasma treatment led to the elimination of carbonized layer from the PPTA yarn surface and the formation of oxygen functionalities including C-O and C=O groups. The elimination of the carbonaceous deposits from the PPTA surface and the interaction between the silicone adhesive and the oxygen functionalities created by the plasma treatment contribute to the improvement of adhesion with silicone rubber. 相似文献
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《Journal of Adhesion Science and Technology》2013,27(1):139-149
The use of aramid fibers as a reinforcing material in both tires and mechanical rubber goods, such as hoses, belts, etc., is growing. In these dynamic applications, the adhesion between fiber and rubber is critical. This can be optimized by activating the aramid with an epoxy formulation, followed by RFL (Resorcinol Formaldehyde Latex) treatment. In the past, various combinations of analytical techniques have been used to study the relationship between the fiber surface treatment, the resulting microscopic interphase structure and the macroscopic rubber properties. The fundamental knowledge acquired from these past studies has been exploited here to investigate the effect of oily finish components on the aramid–rubber adhesion. For this purpose, aramid yarn has been treated with various combinations of an adhesion improving (epoxy–amine) component and a processability improving (oily) component. Contrary to general belief, the oily components do not directly reduce the SPAF (Strap Peel Adhesion Force) to rubber, rather show some positive effect. Furthermore, there is a relative broad 'safe' oil range, i.e., fluctuations in the amount of oil will not directly lead to adhesion problems. This is in line with earlier observations, but this study using appropriate analytical techniques provides quantitative confirmation and additional understanding of the fundamental principles behind these effects. 相似文献
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Ruijie Han Yuanrui Shao Xudong Quan Kangmin Niu 《Polymer Engineering and Science》2021,61(7):2023-2032
The dry/wet environment's effects on the sliding friction properties of fabric–silicone rubber composites are studied, and the wear resistance of polyester fabric is evaluated. The yarn directions of the fabrics (inner and outer) have significant influence on the coefficient of friction (COF) of fabric–silicone rubber composites during sliding friction due to the difference in fabric texture and yarn modulus. The COF's variation laws of fabric–silicone rubber composites under different vertical loads and sliding rates are observed, respectively. Additionally, the outer fabric is more sensitive to the changes of vertical loads than those of the sliding rates under the wet environment, which can be attributed to the destruction of the fabric original structure by high load, resulting in the fabric fibers' pulling and breaking during the steel ball's sliding. This study provides new ideas for the design of fabric–silicone rubber composites applied in friction conditions and complex environments. 相似文献