Effect of Methyl Silicone Oil and Poly(vinyl Alcohol) On the Moisture Resistance of Ester-hardened Sodium Silicate Bonded Ceramic Sand

IF 2.8 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Silicon Pub Date : 2025-02-14 DOI:10.1007/s12633-025-03249-z

Huichao Pan, Xueshan Du, Yang Li, Fanxi Meng, Mengjie Dong, Xinbiao Ma, Jingyu Zhao, Wenbo Cao, Yufu Sun

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Abstract

Sodium silicate binder as a binder for sand casting has the advantages of green, non-polluting, low cost, but the problem of strong hygroscopicity of sodium silicate bonded ceramic sand (SSBCS) has been pending solution. In this paper, the effect of methyl silicone oil and poly(vinyl alcohol) on the moisture resistance of ester-hardened SSBCS was studied, aiming to solve the problem of high moisture absorption of SSBCS. The results showed that the optimum ratio was 15% methyl silicone oil and 3% poly(vinyl alcohol). Compared with unmodified SSBCS, the moisture absorption rate of SSBCS modified by methylsilicone oil and poly(vinyl alcohol) at 2, 4, 6 and 8 h decreased by 0.2%, 0.18%, 0.32% and 0.51%, respectively, and the strength loss rate at 2, 4, 6 and 8 h decreased to 0. Characterization analysis concluded that methyl silicone oil and poly(vinyl alcohol) improved the strength of SSBCS by absorbing free sodium ions (Na⁺) from the sand and by covering the surface of SSBCS with a film to reduce water absorption.

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甲基硅油和聚乙烯醇对酯硬化水玻璃粘结陶瓷砂耐湿性的影响

硅酸钠粘结剂作为砂型铸造的粘结剂，具有绿色环保、无污染、成本低等优点，但硅酸钠粘结陶粒砂（SSBCS）吸湿性强的问题一直有待解决。本文研究了甲基硅油和聚乙烯醇对酯类硬化 SSBCS 防潮性的影响，旨在解决 SSBCS 吸湿性强的问题。结果表明，最佳比例为 15%的甲基硅油和 3%的聚乙烯醇。与未改性的 SSBCS 相比，经甲基硅油和聚乙烯醇改性的 SSBCS 在 2、4、6 和 8 h 的吸湿率分别降低了 0.2%、0.18%、0.32% 和 0.51%，2、4、6 和 8 h 的强度损失率降至 0。表征分析认为，甲基硅油和聚（乙烯醇）通过吸收沙子中的游离钠离子（Na+），并在 SSBCS 表面覆盖一层薄膜以减少吸水性，从而提高了 SSBCS 的强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.