• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (18): 1-6.doi: 10.3901/JME.2020.18.001

• 仪器科学与技术 •    下一篇

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基于交变磁场红外热像的磁性水凝胶缺陷检测

乔严程1,2, 解社娟1,2, 仝宗飞1,2, 唐敬达1, 许盼盼1,2, 李骥3, 李丽娟3, 陈振茂1,2   

  1. 1. 西安交通大学机械结构强度与振动国家重点实验室 西安 710049;
    2. 西安交通大学陕西省无损检测结构完整性评价工程技术中心 西安 710049;
    3. 中国核动力研究设计院 成都 610213
  • 收稿日期:2019-10-01 修回日期:2020-03-31 出版日期:2020-09-20 发布日期:2020-11-17
  • 通讯作者: 解社娟(通信作者),女,1983年出生,博士,副教授,博士研究生导师。主要研究方向为基于电磁/声/热的无损检测与断裂力学。E-mail:xiesj2014@mail.xjtu.edu.cn
  • 作者简介:乔严程,男,1996年出生。主要研究方向为软物质与红外无损检测方法。E-mail:qiaoyancheng123@stu.xjtu.edu.cn
  • 基金资助:
    国家自然科学基金(51877163,11927801)、反应堆燃料及材料重点实验室基金、新疆维吾尔自治区自然科学基金(2019D01A76)、中国博士后科学基金(2018M641035)、陕西省高校科协青年人才托举计划(20170601)和远东无损检测新技术论坛创新人才支持计划资助项目。

Magnetic Hydrogel Defect Detection Based on Infrared Thermal Image of Alternating Magnetic Field

QIAO Yancheng1,2, XIE Shejuan1,2, TONG Zongfei1,2, TANG Jingda1, XU Panpan1,2, LI Ji3, LI Lijuan3, CHEN Zhenmao1,2   

  1. 1. Xi'an Jiaotong University, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an 710049;
    2. Xi'an Jiaotong University, Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation, Xi'an 710049;
    3. Nuclear Power Institute of China, Chengdu 610213
  • Received:2019-10-01 Revised:2020-03-31 Online:2020-09-20 Published:2020-11-17

摘要: 磁性水凝胶是具有磁性纳米粒子的水凝胶,具有独特的磁响应特性,被广泛应用于组织工程支架、生物工程细胞分离、药物载体和环境工程等方面。磁性水凝胶的磁性纳米粒子的分布对其磁响应有着决定性的作用,因此,对于磁性水凝胶的磁性均匀性分析是十分必要的。目前,对于磁性水凝胶的无损检测手段基本空白,鲜见文献报道。磁性水凝胶中磁性纳米粒子在交变磁场作用下由于弛豫作用会产生热量。基于以上研究背景,研究针对磁性水凝胶材料开发一种新型无损检测手段:基于交变磁场的红外热成像检测方法。通过对磁性水凝胶和铜粉硅胶板的检测,验证磁性水凝胶在交变磁场作用下的发热原理;通过对不同浓度磁性水凝胶的检测,验证利用交变磁场的红外热成像对磁性水凝胶中磁性纳米粒子均匀性分析的可行性,并对磁性水凝胶中磁性粒子分布不均、气泡缺陷分别进行检测,结果显示均能较好地检出;基于理论分析得出磁性水凝胶在交变磁场作用下的表面温升速率与其磁性纳米粒子浓度存在线性关系的猜想,通过对不同浓度水凝胶的检测得到的数据进行拟合,证实磁性水凝胶中磁性纳米粒子的浓度与其表面温升速率存在线性关系。

关键词: 磁性水凝胶, 磁性纳米粒子, 缺陷检测, 交变磁场, 红外热成像

Abstract: Magnetic hydrogel, a hydrogel with magnetic nanoparticles and unique magnetic response characteristics, has been widely used in fields of tissue engineering scaffolds, bioengineered cell separation, drug carriers, and environmental engineering. The distribution of magnetic nanoparticles in magnetic hydrogels plays a decisive role in their magnetic responses, which makes the analysis of the magnetic homogeneity of magnetic hydrogels a necessity. Yet there still lacks sufficient research or practice in non-destructive testing of magnetic hydrogels and has not been reported in the literature. Based on the backgrounds above, a novel non-destructive testing method for magnetic hydrogel defect detection has been developed, that is, the infrared thermal imaging method based on alternating magnetic field. The specific work is as follows. The magnetic hydrogel and copper powder silica gel plate have been detected, and furthermore, the feasibility of the principle of the magnetic hydrogel's getting heated has been verified under the alternating magnetic field. through the detection of magnetic hydrogels with different concentrations, the feasibility of using alternating magnetic fields infrared for The uniformity analysis of magnetic nanoparticles in magnetic hydrogels is verified. The uneven distribution of magnetic particles and bubble defect have also been detected and it has been found that the method works in the above detections. Based on theoretical analysis, it is deduced that there could be a linear relationship between the surface temperature rise rate of the magnetic hydrogel and the concentration of the magnetic nanoparticles under the alternating magnetic field. Through fitting the measured data of different concentration hydrogel, the above deduction is further proved.

Key words: magnetic hydrogels, magnetic nanoparticle, defect detection, alternating magnetic field, infrared thermal imaging

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