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低表面张力玻璃纤维增强复合材料的研究

The Research on the Glass Fiber Reinforced Plastic with Low Surface Tension

【作者】 丁可

【导师】 闻荻江;

【作者基本信息】 苏州大学 , 材料学, 2007, 硕士

【摘要】 本文针对在纤维增强聚合物复合材料(Fiber Reinforce Plastic,简称FRP)的表面和界面的研究成果基础上,研究合成了适合纤维增强环氧树脂表面的活性改性物质(环氧丙基八氟戊醚),分别考察了反应时间与反应温度对反应产率的影响。并且利用已有的活性物质(甲基丙烯酸六氟丁酯G-02,甲基丙烯酸十二氟庚酯G-04)处理玻璃纤维增强不饱和聚酯的表面,在基体固化时,实现在材料表层参与固化反应,获得特低临界表面张力、高接触角特性,使处理后的玻璃钢表面具有一定的疏水疏油性能。得到以下结论:1.以八氟戊醇、环氧氯丙烷和氢氧化钠为原料、甲苯为溶剂、四丁基溴化铵为催化剂合成的环氧丙基八氟戊醚能达到很高的纯度,并且具有较低的表面张力。最后确定其最佳合成反应条件是反应温度为70℃;反应时间为4小时,反应物摩尔比为n1(八氟戊醚):n2(环氧氯丙烷):n3(氢氧化钠)=1:2:1.1。2.经测试发现经过G-02处理的聚酯玻璃钢表面对水的接触角由原来的49.3°增大到74.7°,表面张力也相应地由35.9mN/m减小到25.9mN/m;而由G-04处理的聚酯玻璃钢其对水的接触角由原来的49.3°增大到79.7°,表面张力也由35.9mN/m减小到24.5mN/m。同时经过环氧丙基八氟戊醚处理的环氧玻璃钢表面对水的接触角也由原来的51.3°增大到75.3°,其表面张力由36.5mN/m减小到25.5mN/m,达到一定的疏水疏油效果。3.用红外光谱反射法测试了经含氟物处理前后的玻璃钢表面结构变化,并且分别测试了在冷水、温水、石油醚中浸泡洗涤半个小时后的表面含氟处理的玻璃钢的表面结构,发现其表面结构与浸泡前无大的变化。用X射线光电子能谱(XPS)对其处理前后的玻璃钢表面元素分别进行了全谱和碳、氟精细谱分析,进一步验证了表面有氟元素的引入,并且用离子刻蚀的方法估定了表面含氟物的厚度大于10nm。4.研究发现,经G-02、G-04处理后的聚酯玻璃钢的与未处理的聚酯玻璃钢相比,其耐水性增强,耐弱酸性也有所增强,但耐强酸性、耐碱性、耐有机溶剂的腐蚀性变化不大;而经环氧丙基八氟戊醚处理后的环氧玻璃钢其耐酸耐碱性都有相应的增强,但是其耐有机溶剂的腐蚀性无太大变化。5.用含氟物代替脱模剂(石蜡,PVA)手糊成型了玻璃钢,用T型剥离方法测试了其剥离强度,并且与以聚乙烯醇、石蜡做脱模剂时进行了比较,比较后发现其脱模效果不如聚乙烯醇、石蜡的效果好。

【Abstract】 This article is based on the surface and interfacial investigation of the FRP. Investigateand synthesize a new active material (3-(1H, 1H, 5H-Octafluoropentyloxy)-1, 2-Propenoxide)that can apply to the glass fiber reinforced epoxy resin. The influence of reactive time andtemperature is investigated. And we also modify the surface of the glass fiber reinforcedunsaturated polyester with the G-02 and G-04. It reacts with the material’s surface layer whenthe Composite solidifies. It gets a lower critical surface tension, high contact angle. Theproperty of waterproof and oilproof has improved. The main conclusions list below:1. 3-(1H, 1H, 5H-Octafluoropentyloxy)-1, 2-Propenoxide is synthesized by OFP(2, 2, 3, 3, 4, 4, 5, 5-Octafluoro-1-pentanol) and epichlorohydrin, toluene as solvent, and sodium hydroxideas the catalyst. The product is of high purity, and it has relatively low surface tension. Thebest reactive condition is that the temperature is 70℃and the reactive time is about 4 hours, and the Moore rate of OFP(n1): epichlorohydrin(n2): sodium hydroxide(n3) is 1: 2: 1.1.2. It is found that the contact angle of glass fiber reinforced unsaturated polyesterfluoridized by G-02 has increased from 49.3°to 74.7°, and the surface tension has reducedfrom 35.9 mN/m to 25.9mN/m accordingly. The contact angle of glass fiber reinforcedunsaturated polyester fluoridized by G-04 has increased from 49.3°to 79.7°, and the surfacetension has reduced from 35.9 mN/m to 24.5mN/m accordingly. The contact angle of glassfiber epoxy resin fluoridized by 3-(1H, 1H, 5H-Octafluoropentyloxy)-1, 2-Propenoxide hasincreased from 51.3°to 75.3°, and the surface tension has reduced from 36.5mN/m to25.5mN/m accordingly. It achieves a certain extent effect of waterproof and oilproof.3. Test the change of surface ingredient before and after the fluoridized of the FRP usingthe reflecting method of infrared spectrum. Then dip the fluoridized FRP in the cold water, warm water and petroleum ether for about half an hour, and surface ingredient haven’t changed too much. Analyses the exterior element of the FRP using the XPS. Test the fullspectrum, the carbon subtle spectrum and fluorine subtle spectrum. Validate that the fluorinehas combined in the surface of the FRP, and then assess the thickness of fluorine using thehydronium etching technology.4. It is found that compared with the untreated glass fiber reinforced unsaturated polyester, the fluoridized FRP’s property of anti-water and anti infirm-acid has enhanced, while theproperty of anti- strong acid, anti-strong alkali and anti-organic solvent hasn’t changed much.The property of anti-acid and anti-alkali of the glass fiber reinforced epoxy resin fluoridizedby 3-(1H, 1H, 5H-Octafluoropentyloxy)-1, 2-Propenoxide has a corresponding increase, but theproperty of anti-organic solvent hasn’t changed much.5. Mold the FRP by replacing the mold releasing agent with the fluoride. Test the T peelingstrength and compare it with the PVA and the olefin as the mold releasing agent. The effect ofthe fluoride as the mold releasing agent is not as good as the PVA and the olefin.

  • 【网络出版投稿人】 苏州大学
  • 【网络出版年期】2008年 04期
  • 【分类号】TB332
  • 【被引频次】3
  • 【下载频次】640
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