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3D打印光敏树脂的性能研究

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二氧化硅由于不参与化学反应,适量加入可以降低树脂固化物的体积收缩率和热膨胀系数,还可以提高树脂固化物的力学性能.但是,二氧化硅在树脂中的含量多少仍是3D打印树脂配方中未解决的一大问题.通过对比填充SiO2为0%、0.1%、0.5%、1%、1.5%、2%树脂的二氧化硅分散程度以及测量样品的质量指标:胶凝含量、储能模量和损耗模量,进而确定二氧化硅最优含量.SEM结果表明:SiO2在树脂中的分散效果随含量的增加而下降.通过对比不同样本的凝胶含量可知:随SiO2填充量的增加,样本的凝胶含量逐渐下降.通过比较储能模量和损耗模量可知:随着SiO2填充量的增加,样本力学性能呈先增加,后减小的趋势.当其含量在1%时,样本成型的力学性能最优.综合考虑二氧化硅在树脂中的分散特性,对于树脂的固化率和成型质量的影响,确定SiO2最优填充量为1.0%.最后,基于最优SiO2填充量的树脂配方进行3D打印试验,结果表明3D打印的成型试件能够完整地制作出高度大于10 mm以上的部件.
Research on Photosensitive Resins for 3D Printing
SiO2 can reduce volume shrinkage/thermal expansion coefficient and improve mechanical properties of cured resins, as itdoes not react with resins. However, the optimum amount of SiO2 in resin is still a problem for the preparation of resins for 3D printing. This study compared SiO2dispersion and other properties (gel content, storage modulus and loss modulus) of samples containing 0%, 0.1%, 0.5%, 1%, 1.5% and 2% SiO2, respectively, and the optimal content of SiO2 was determined. SEM results show that SiO2 dispersion becomes worse when SiO2 content increases. The sample gel content gradually decreases with the increase of SiO2. Moreover, the mechanical properties increase first and then decrease, which shows the best performance when SiO2 content is 1%. Finally, 3D printing was studied using the 1% SiO2 sample, and the result shows that components with over 10 mm height can be produced.

three-dimensional printingresin formulationsilicon dioxideperformance test

钱波、王明义、刘志远、李腾飞

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华东理工大学机械与动力工程学院,上海200237

3D打印 光敏树脂 二氧化硅 性能测试

北京市自然科学基金国家自然科学基金

313200721206152

2017

高校化学工程学报
浙江大学

高校化学工程学报

CSTPCDCSCD北大核心EI
影响因子:0.591
ISSN:1003-9015
年,卷(期):2017.31(1)
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