Incorporation of acrylated cellulose nanocrystals into photocurable resin for high-fidelity printing of transparent 3D structures

IF 6.8 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes Pub Date : 2025-02-13 DOI:10.1016/j.jmapro.2025.02.023

Junsik Choi , Deepika Thakur , Jinhong Min , Jiho Lee , Hoon Kim , Jinho Hyun

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Abstract

The incorporation of cellulose nanocrystals (CNCs) into trimethylolpropane formal acrylate (CTFA) ink for digital light processing (DLP) 3D printing has been found to increase light scattering, which subsequently reduces the mechanical properties of printed structures. In this study, acrylated cellulose nanocrystals (A-CNCs) were synthesized by treating sulfonated CNCs with methacrylic acid and were successfully integrated into a UV-curable resin for DLP 3D printing. The effect of ultrasonication on A-CNC dispersion within the resin was assessed by measuring the change in the transmittance of suspensions. The composite resin ink containing A-CNCs retained transparency, and the resulting printed structures demonstrated significant mechanical reinforcement even at low A-CNC concentrations. This improvement is attributed to the high colloidal stability of A-CNCs within the ink. Furthermore, the suitability of the resin for 3D printing was confirmed through the examination of the morphologies of the printed structures. Moreover, the structures printed using A-CNC/CTFA exhibited shape memory behavior in response to thermal stimuli, affirming the potential of the composite resin in bioengineering applications.

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在光固化树脂中加入丙烯酸纤维素纳米晶体，实现透明三维结构的高保真打印

研究发现，将纤维素纳米晶体（cnc）加入到数字光处理（DLP） 3D打印的三甲基丙烷正态丙烯酸酯（CTFA）油墨中会增加光散射，从而降低打印结构的机械性能。在本研究中，通过甲基丙烯酸处理磺化的纳米纤维素，合成了丙烯酸化纤维素纳米晶体（a - cnc），并成功地集成到一种用于DLP 3D打印的uv固化树脂中。通过测量悬浮液透光率的变化来评估超声对树脂内A-CNC分散的影响。含有A-CNC的复合树脂油墨保持了透明度，即使在低浓度的A-CNC下，打印的结构也表现出显著的机械增强。这种改进归因于a - cnc在油墨中的高胶体稳定性。此外，通过检查打印结构的形态，确认了树脂用于3D打印的适用性。此外，使用A-CNC/CTFA打印的结构在热刺激下表现出形状记忆行为，证实了复合树脂在生物工程应用中的潜力。

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来源期刊

Journal of Manufacturing Processes ENGINEERING, MANUFACTURING-

CiteScore

10.20

自引率

11.30%

发文量

833

审稿时长

50 days

期刊介绍： The aim of the Journal of Manufacturing Processes (JMP) is to exchange current and future directions of manufacturing processes research, development and implementation, and to publish archival scholarly literature with a view to advancing state-of-the-art manufacturing processes and encouraging innovation for developing new and efficient processes. The journal will also publish from other research communities for rapid communication of innovative new concepts. Special-topic issues on emerging technologies and invited papers will also be published.