本文關(guān)鍵詞：3D噴墨打印用光固化型電子漿料的制備與研發(fā)　出處：《浙江工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 3D噴墨打印 紫外光-熱雙重固化 環(huán)氧丙烯酸樹脂 磁性漿料 表面改性 流變性 紫外光固化性能 漿料穩(wěn)定性

【摘要】：三維噴墨打印技術(shù)是增材制造技術(shù)的一個(gè)細(xì)分技術(shù)領(lǐng)域,因其具有靈活性好、目標(biāo)性強(qiáng)、多材質(zhì)一體式制造等優(yōu)勢而相對于其他增材制造方法更具活性。但因材料研發(fā)不成熟及設(shè)備造價(jià)昂貴等問題,限制其主要應(yīng)用在生物醫(yī)療方面(如牙科、器官打印)。該技術(shù)面臨的難題還很多,本課題主要針對適用于該技術(shù)的光固化型電子漿料的研發(fā),做了以下三方面的研究,取得了一些進(jìn)展:在不除氧、無氣氛保護(hù)的條件下對環(huán)氧樹脂進(jìn)行丙烯酸化改性,直接合成了可光-熱雙重固化的環(huán)氧丙烯酸樹脂,用紅外光譜對合成樹脂進(jìn)行表征,證明得到了環(huán)氧丙烯酸酯。研究了丙烯酸用量、反應(yīng)溫度等因素對樹脂涂膜柔韌性、抗沖擊性、耐試劑性等物理性能的影響,發(fā)現(xiàn)丙烯酸和環(huán)氧基的摩爾比例及反應(yīng)溫度對樹脂的性能有很大的影響,說明控制丙烯酸用量及反應(yīng)溫度的重要性。用紅外光譜表征樹脂在各個(gè)固化條件下的涂膜,結(jié)果證明對于所合成樹脂用光固化輔以熱固化的固化方式可以縮短固化時(shí)間并提高固化深度。結(jié)果表明,合理控制丙烯酸與環(huán)氧基的摩爾比例和反應(yīng)溫度,對樹脂的固化性能及樹脂固化膜的物理性能有較大的提高,尤其體現(xiàn)在樹脂的硬度和柔韌性上,主要是由于丙烯酸用量及反應(yīng)溫度的差異會導(dǎo)致所得樹脂的結(jié)構(gòu)變化。將制得的光-熱雙重固化樹脂和磁粉進(jìn)行混合,制備不同配方的導(dǎo)磁漿料,研究了不同稀釋劑劑量、不同觸變劑劑量、磁粉添加量對漿料流變性、穩(wěn)定性及光固化性能的影響規(guī)律,以及對固化薄膜的硬度和附著力的影響。結(jié)果表明,樹脂:PGMEA的比例為1:2.5時(shí),漿料粘度符合要求,性能最佳。在漿料觸變性方面,對觸變劑進(jìn)行活化預(yù)分散,觸變效果更加明顯,對磁粉的承載作用更好,最佳用量為1%(wt)。磁粉固含量一直被提升到65%(wt),漿料的粘度仍符合打印要求,漿料固化膜的性能保持穩(wěn)定,磁粉含量繼續(xù)增加,固化膜性能將大幅下降。用阿基米德排水法和永磁特性測量儀測量了漿料固化件的密度和磁性能。結(jié)果表明,磁粉含量控制在合理的范圍內(nèi)有助于保證固化件的密實(shí)度。用不同性質(zhì)的表面改性劑對磁粉進(jìn)行了表面改性,再用所得改性磁粉進(jìn)行磁性漿料的配制,用旋轉(zhuǎn)流變儀分析漿料粘度和磁粉在漿料中分散效果,用掃描電鏡分析漿料固化件中磁粉分散效果及磁粉和樹脂的結(jié)合效果。結(jié)果表明,合理的表面改性劑選擇,對磁粉在漿料中的分散效果、漿料的粘度及樹脂固化膜密實(shí)度都有較大的提升,因每種改性劑對性能提升存在片面性,表面改性劑進(jìn)行配合使用效果更佳。
[Abstract]:Three-dimensional inkjet printing technology is a subdivision of material augmentation manufacturing technology, because of its good flexibility and strong target. The advantages of multi-material integrated manufacturing are more active than other material adding methods. However, due to the immaturity of material research and development and the high cost of equipment, it is limited to be mainly used in biomedicine (such as dentistry). There are still a lot of difficulties in this technology. This paper mainly focuses on the research and development of light-cured electronic paste which is suitable for this technology, and has made some progress in the following three aspects: no oxygen removal. Epoxy acrylic resin which can be cured by light and heat was synthesized directly by acrylic modification of epoxy resin without atmosphere protection. The synthetic resin was characterized by infrared spectrum. The effects of the amount of acrylic acid and reaction temperature on the physical properties of resin film such as flexibility, impact resistance and reagent resistance were studied. It is found that the molar ratio of acrylic acid to epoxy group and reaction temperature have great influence on the properties of the resin. The importance of controlling the amount of acrylic acid and reaction temperature is explained. The coating film of resin under various curing conditions is characterized by infrared spectrum. The results show that the curing time and curing depth can be shortened and the curing depth can be improved by using the curing method of light curing and heat curing for the synthetic resin. The results show that the molar ratio of acrylic acid to epoxy group and the reaction temperature can be reasonably controlled. The curing properties of the resin and the physical properties of the resin curing film have been greatly improved, especially in the hardness and flexibility of the resin. It is mainly due to the difference in the amount of acrylic acid and the reaction temperature that the structure of the resin will change. The photo-thermal double curing resin and magnetic powder are mixed to prepare the magnetic conductive paste with different formulations. The effects of different diluent dosage, different thixotropic agent dosage and magnetic powder addition on rheology, stability and photocuring properties of the slurry, as well as the hardness and adhesion of the cured film were studied. When the ratio of resin to PGMEA is 1: 2.5, the viscosity of the paste meets the requirements and the performance is the best. In the thixotropy of the slurry, the thixotropic agent is activated and predispersed, and the thixotropic effect is more obvious. The bearing capacity of the magnetic powder is better, the optimum dosage is 1 wtl. The solid content of the magnetic powder has been raised to 65%, the viscosity of the slurry still meets the printing requirements, and the properties of the slurry curing film remain stable. The density and magnetic properties of the solidified parts were measured by Archimedean drainage method and permanent magnet characteristic measuring instrument. The control of magnetic powder content in a reasonable range is helpful to ensure the density of solidified parts. The surface modification of magnetic powder is carried out with different surface modifiers, and the modified magnetic powder is used to prepare magnetic paste. The viscosity of slurry and the dispersion effect of magnetic powder in slurry were analyzed by rotary rheometer, and the dispersion effect of magnetic powder and the binding effect of magnetic powder and resin in slurry solidified parts were analyzed by scanning electron microscope. Reasonable surface modifier selection, the dispersion effect of magnetic powder in the slurry, the viscosity of the slurry and the resin curing film density are greatly improved, because each modifier has one-sidedness to the performance improvement. The effect of surface modifier is better.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TB34

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