TiO2前驱体微胶囊型缓蚀剂的制备与性能研究

doi:10.15541/jim20140205

无机材料学报 ›› 2015, Vol. 30 ›› Issue (1): 47-52.DOI: 10.15541/jim20140205

TiO₂前驱体微胶囊型缓蚀剂的制备与性能研究

李洪广, 闫军, 汪明球, 孟胜皓, 杜仕国

(军械工程学院三系, 石家庄 050003)

收稿日期:2014-04-16 修回日期:2014-06-18 出版日期:2015-01-20 网络出版日期:2014-12-29
作者简介:李洪广(1988–), 男, 博士研究生. E-mail: qdlhgcy6@126.com
基金资助:
国家自然科学基金(51272284);军械工程学院科学研究基金(YJJXM13016)

Microcapsulation of TiO₂ precursor and Its Performance as Inhibitor of Erosion

LI Hong-Guang, YAN Jun, WANG Ming-Qiu, MENG Sheng-Hao, DU Shi-Guo

(The 3rd Department of Ordnance Engineering College, Shijiazhuang 050003, China)

Received:2014-04-16 Revised:2014-06-18 Published:2015-01-20 Online:2014-12-29
About author:LI Hong-Guang. E-mail: qdlhgcy6@126.com
Supported by:
National Natural Science Foundation of China (51272284);Science Research Foundation of Ordnance Engineering College (YJJXM13016)

摘要/Abstract

摘要：

随着火炮初速、膛压、射速的提高, 炮膛的烧蚀磨损逐渐变得严重, 对高效缓蚀剂的需求越来越迫切。本研究以聚乙烯醇(PVA)为壁材, 在W/O/W复乳体系中利用界面交联法制备了TiO₂前驱体微胶囊, 探讨了微胶囊的形成机理。扫描电镜观察表明微胶囊呈现出球形形貌, 分散性好, 囊壁致密、包覆完整, 粒径分析显示其平均粒径在10 μm左右; 红外分析进一步证实微胶囊是由醇醛树脂层包覆TiO₂前驱体形成; 热分析表明微胶囊中固体TiO₂含量约为35%。利用烧蚀管试验法测试其降烧蚀性能, 结果表明TiO₂前驱体微胶囊型缓蚀剂不影响发射药的燃烧规律, 在相对于发射药质量2.5wt%的添加量下, 降烧蚀效率达到35%左右。

关键词: 烧蚀磨损, 缓蚀剂, TiO2前驱体, 微胶囊

Abstract:

As erosion and wear of gun bore become increasingly serious with the increase of muzzle velocity, chamber pressure and rate of fire, the demand for their high effective inhibitor is urgent. TiO₂ precursor microcapsules with polyvinyl alcohol (PVA) as wall material were prepared by interfacial crosslinking method in W/O/W multiphase emulsion. The microcapsules were characterized by scanning electron microscope (SEM), particle size analyzer, fourier transform infrared spectrometer (FT-IR), thermogravimetric analyzer (TG). The results showed that the microcapsules were dispersive spherical particles at average size of 10 μm with integral and dense shell. The microcapsules were composed of about 35% solid TiO₂ and aldol resin layer. Its anti-erosion effect was tested by erosion tube method, and showed that the combustion law of propellant was not affected after application and the anti-erosion efficiency was 35% when added 2.5wt% microcapsules relative to propellant mass.

Key words: erosion and wear, inhibitor, TiO2 precursor, microcapsule

中图分类号:

TJ307

李洪广, 闫军, 汪明球, 孟胜皓, 杜仕国. TiO₂前驱体微胶囊型缓蚀剂的制备与性能研究[J]. 无机材料学报, 2015, 30(1): 47-52.

LI Hong-Guang, YAN Jun, WANG Ming-Qiu, MENG Sheng-Hao, DU Shi-Guo. Microcapsulation of TiO₂ precursor and Its Performance as Inhibitor of Erosion[J]. Journal of Inorganic Materials, 2015, 30(1): 47-52.

图/表 11

图 1 微胶囊的制备工艺流程

Fig. 1 Preparing process of microcapsules

图 2 稳定的W/O乳液的显微镜照片

Fig. 2 Microscope graph of stabled W/O emulsion

图 3 微胶囊的SEM照片

Fig. 3 SEM images of microcapsules

图 4 微胶囊的粒径分布

Fig. 4 Particle size distribution of microcapsules

图 5 界面交联过程示意图

Fig. 5 Process of interfacial crosslinking

图 6 样品的红外光谱图

Fig. 6 FT-IR spectra of samples. (a) Aldol resin; (b) Microcapsule; (c) TiO2

图 7 样品的TG/DTG曲线

Fig. 7 TG/DTG curves of samples. (a) Aldol resin; (b) Microcapsule

图 8 微胶囊、发射药和微胶囊/发射药混合物的DSC曲线

Fig. 8 DSC curves of microcapsules and their mixture with propellant

图 9 不同试验条件下的P-t曲线

Fig. 9 P-t curves at different conditions

表 1 烧蚀试验结果

Table 1 The results of erosion test

Propellant mass/ g	Inhibitor mass/ g	Average pressure/ MPa	Amount of erosion/ mg	Erosion-reducing efficiency/ %
11.8	-	245.2	399.7	-
11.8	0.3	247.9	260.9	34.7
11.8	0.5	242.9	256.8	35.8
11.8	0.8	248.7	289.7	27.5

图 10 微胶囊样品煅烧后的扫描电镜照片

Fig. 10 SEM images of microcapsules after calcined at 800℃(increased from normal temperature at 5 ℃/min) (a) and directly at 800℃ (b, c) for 10 min

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TiO₂前驱体微胶囊型缓蚀剂的制备与性能研究

Microcapsulation of TiO₂ precursor and Its Performance as Inhibitor of Erosion

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