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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced dispersion of hydroxyapatite whisker in orthopedics 3D printing resin with improved mechanical performance
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Enhanced dispersion of hydroxyapatite whisker in orthopedics 3D printing resin with improved mechanical performance

机译：改善机械性能的骨科三维印刷树脂中羟基磷灰石晶须的分散

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摘要

One-dimensional fillers such as rods and fibers have shown effective mechanical reinforcement in polymer nanocomposites, but their application in vat polymerization-based 3D printing techniques was hindered due to the rapidly increased viscosity of the resin. In order to improve the fluidity of the composites without sacrificing the mechanical performance, herein we demonstrated that one-dimensional hydroxyapatite (HAP) whiskers could be surface modified with 3-(trimethoxysilyl) propyl methacrylate, to decrease the viscosity of the resulting resins and to enhance the interfacial adhesion between the filler and matrix. Rheology results showed that the resin was still fluidic with loading of HAP whiskers up to 20 wt%, with Young's modulus increased by a factor of 98% and the ultimate tensile strength increased by 26%. Successful printing of the resin on a DLP printer was achieved with high resolution and fine surface, and the biocompatibility test showed an increase in cell viability with the addition of HAP whiskers. These results provide a promising approach to develop high-performance printable resin for orthopedic and related bio-printing.
机译：杆和纤维等一维填料在聚合物纳米复合材料中表现出有效的机械增强作用，但由于树脂的粘度迅速增加，它们在基于还原聚合的3D打印技术中的应用受到阻碍。为了在不牺牲机械性能的情况下提高复合材料的流动性，我们在此证明，可以用3-（三甲氧基硅）甲基丙烯酸丙酯对一维羟基磷灰石（HAP）晶须进行表面改性，以降低所得树脂的粘度，并增强填料与基体之间的界面粘合。流变学结果表明，当HAP晶须含量达到20 wt%时，树脂仍然是流体性的，杨氏模量增加了98%，极限拉伸强度增加了26%。在DLP打印机上成功打印出高分辨率和精细表面的树脂，生物相容性测试表明，添加HAP晶须后，细胞活力增加。这些结果为开发用于骨科和相关生物打印的高性能可打印树脂提供了一条有希望的途径。

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