硅酸盐学报

含镁类水滑石及丛林伪装涂层的制备及植物可见-近红外光谱模拟

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周海杰 ¹ , 潘国祥 ¹ , 陈昌耘 ¹ , 刘世桦 ¹ , 肖春明 ¹ , 曹洺于 ¹ , 徐敏虹 ¹ , 李金花 ²

硅酸盐学报 | 研究论文 2026,54(5): 1827-1834

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硅酸盐学报 |研究论文 2026 , 54 (5) : 1827 -1834

含镁类水滑石及丛林伪装涂层的制备及植物可见-近红外光谱模拟

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周海杰¹, 潘国祥¹, 陈昌耘¹, 刘世桦¹, 肖春明¹, 曹洺于¹, 徐敏虹¹, 李金花²

作者信息

^1．湖州师范大学材料工程系，浙江湖州 313000

^2．浙江华源颜料股份有限公司，浙江湖州 313220

通讯作者:

潘国祥（1981—），男，博士，教授。

作者简介:

周海杰（1999—），男，硕士研究生。

Visible-Near Infrared Spectroscopy Simulation of Jungle Camouflage Coating based on Hydrotalcites Containing Magnesium

Haijie ZHOU¹, Guoxiang PAN¹, Changyun CHEN¹, Shihua LIU¹, Chunming XIAO¹, Mingyu CAO¹, Minhong XU¹, Jinhua LI²

Affiliations

^1.Department of materials engineering, Huzhou normal university, Huzhou 313000, Zhejiang, China

^2.Zhejiang Huayuan Pigment Co., Ltd, Huzhou 313220, Zhejiang, China

Corresponding Author:

PAN Guoxiang (1981-), male, Ph.D., Professor. E-mail: pgxzjut@163.com

ZHOU Haijie (1999-), male, Master candidate. E-mail: 982201297@qq.com

出版时间: 2026-04-09 doi: 10.14062/j.issn.0454-5648.20250409

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摘要

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现有的丛林伪装涂层模拟材料，与绿色植被相比，光谱图往往无法同时满足绿峰和近红外水吸收峰特征。本工作采用共沉淀法制备了硫酸根插层镁铬类水滑石等6种材料，并采用X射线衍射分析、傅里叶红外变换光谱分析、热分析、扫描电子显微镜等手段对该材料进行了结构表征，然后将其与铬绿颜料复合制备丛林伪装功能涂层，进行可见-近红外光谱和热成像测试。研究结果表明，调变层板阳离子和层间阴离子合成的6种类水滑石（LDHs）材料具有典型的层状结构特征，其中硫酸根插层镁铬类水滑石的层间距最大，热失重最多，对应其层间存储水分子最为丰富。可见-近红外光谱测试结果表明，镁铬类水滑石显示了490 nm处蓝峰和1400、1900 nm处的近红外水峰特征，通过将MgCr-SO₄^2--LDHs包覆Cr₂O₃后可形成绿色特征的丛林伪装涂层模拟材料。优化的MgCr-SO₄^2--LDHs@Cr₂O₃与MgCr-SO₄^2--LDHs质量比为3 : 7制备的伪装涂层，其绿峰、近红外吸水特征峰均实现与天然植物叶片的高精度匹配，光谱相似度高达95.80%，且热成像测试与植被结果无明显差异。对颜色和近红外水吸收峰双功能模拟材料的研究，为植被伪装发展提供了一个新的研究方向。

关键词

丛林伪装涂层 / 绿色植被 / 水吸收峰 / 类水滑石 / 光谱相似度

Abstract

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Introduction

The rapid development and practical deployment of hyperspectral detection technology render conventional camouflage materials increasingly inadequate for covert protection in complex forest environments, primarily due to their insufficient spectral matching and limited functionality. A critical challenge in forest camouflage lies in the accurate replication of four characteristic spectral signatures of natural vegetation, i.e., the green peak, the red edge, the near-infrared plateau, and the near-infrared water absorption peak. These features form the unique spectral "fingerprint" of vegetation, which serves as a fundamental basis for evading multi-band, high-precision detection. Among them, the green peak governs a visual concealment within the visible region, while the near-infrared water absorption peak acts as a decisive marker for distinguishing vegetation from artificial materials, which are essential for effective camouflage. However, the existing forest camouflage paints and simulation materials are constrained by inadequate structural design and limited functional integration. Most commercially available products can only partially mimic certain spectral traits of vegetation and commonly exhibit deficiencies in core performance. Note that it remains particularly difficult to simultaneously and accurately match both the green peak of healthy foliage and the near-infrared water absorption peak. This shortfall makes such materials susceptible to rapid identification under hyperspectral imaging, thereby severely limiting the practical effectiveness of the existing forest camouflage technologies. Consequently, there is an urgent need for the research and development of novel camouflage materials capable of comprehensive spectral simulation.

Methods

Six types of sulfate intercalated Mg/Cr layered double hydroxides (LDHs) were synthesized by a coprecipitation method. The crystalline structure of the as-prepared materials was examined by X-ray diffraction (XRD). The molecular structures and characteristic absorption features were determined by Fourier-transform infrared spectroscopy (FT-IR). The thermal decomposition behavior and mass loss profiles were analyzed by thermogravimetry-differential thermal analysis (TG-DTA). The surface morphology and particle size distribution were characterized by scanning electron microscopy (SEM). These characterization techniques provided a comprehensive structural and physicochemical profile of the synthesized LDHs. Subsequently, to meet the requirement of reproducing the green spectral peak in jungle camouflage, a functional camouflage coating was fabricated via blending the optimized LDHs material with chromium-based green pigment. This formulation enhanced the green-peak characteristics in the visible region and preserved the pronounced water-absorption peak in the near-infrared range. The spectral performance of the coating was evaluated by visible-near-infrared spectroscopy (Vis-NIR), and its thermal camouflage capability was assessed by infrared thermographic imaging.

Results and discussion

The results systematically indicate that a series of chromium-containing hydrotalcite materials, prepared by a controlled synthesis process, exhibit typical crystalline structural characteristics of layered double hydroxides (LDHs). The XRD patterns reveal sharp and symmetric diffraction peaks, with the characteristic peaks corresponding to the layered structure displaying a high intensity and a regular shape, indicating a good crystallinity and a well-ordered interlayer arrangement. Among the series of chromium-containing hydrotalcites, sulfate-intercalated magnesium chromium hydrotalcite (MgCr-SO₄^2--LDHs) demonstrates unique structural advantages, i.e., its interlayer spacing is significantly larger than that of other intercalated types of magnesium chromium hydrotalcites. Simultaneously, The TG-DTA thermal analysis indicates that this material exhibits the maximum mass loss of 26.38% at 25-400 ℃. This is directly related to the content of water molecules stored within the interlayers. The spatial configuration and charge distribution characteristics of the sulfate intercalation ions provide a sufficient space for the stable adsorption and storage of water molecules. As a result, MgCr-SO₄^2--LDHs possesses the most abundant interlayer water content among the prepared samples. This rich interlayer water constitutes the core structural basis for simulating the near-infrared water absorption peak of vegetation. The visible to near-infrared spectra (400-2500 nm) further reveal the optical properties of the Mg/Cr hydrotalcite. In the visible region, the material shows a distinct characteristic absorption peak at 490 nm (blue region), attributed to its intrinsic electronic transition behavior. In the near-infrared region, intense and sharp water absorption peaks clearly occur at approximately 1400 nm and 1900 nm, showing a high similarity to the near-infrared water absorption features of natural vegetation leaves. Sulfate-intercalated magnesium chromium hydrotalcite (MgCr-SO₄^2--LDHs) is modified with chromium(III) oxide (Cr₂O₃) by an in-situ coating process via leveraging these characteristics. The near-infrared water absorption properties imparted by the abundant interlayer water in MgCr-SO₄^2--LDHs were combined with the green optical characteristics of Cr₂O₃. This complementary interaction successfully offset the influence of the intrinsic blue absorption peak at 490 nm from the magnesium chromium hydrotalcite. Ultimately, a jungle camouflage coating simulation material is prepared, having both green visual characteristics and distinct near-infrared water absorption peaks. This provides a key material foundation for subsequent high-similarity spectral matching with natural vegetation.

Conclusions

The camouflage coating fabricated with an optimal MgCr-SO₄^2--LDHs@Cr₂O₃ : MgCr-SO₄^2--LDHs ratio of 3 : 7 could enable a precise spectral matching with natural vegetation leaves. It accurately replicated both the green peak and the near-infrared water absorption peak, achieving a spectral similarity of up to 95.80%. Furthermore, the results of thermal imaging tests revealed no significant difference between the coating and natural vegetation. This study on dual-functional materials that simulated color and the near-infrared water absorption peak could thus offer a promising direction for the development of advanced vegetation camouflage technologies.

Key words

jungle camouflage coating / green vegetation / water absorption peak / hydrotalcite / spectral similarity

引用本文

周海杰, 潘国祥, 陈昌耘, 刘世桦, 肖春明, 曹洺于, 徐敏虹, 李金花. 含镁类水滑石及丛林伪装涂层的制备及植物可见-近红外光谱模拟. 硅酸盐学报, 2026 , 54 (5) : 1827 -1834 . DOI: 10.14062/j.issn.0454-5648.20250409

Haijie ZHOU, Guoxiang PAN, Changyun CHEN, Shihua LIU, Chunming XIAO, Mingyu CAO, Minhong XU, Jinhua LI. Visible-Near Infrared Spectroscopy Simulation of Jungle Camouflage Coating based on Hydrotalcites Containing Magnesium[J]. Journal of the Chinese Ceramic Society, 2026 , 54 (5) : 1827 -1834 . DOI: 10.14062/j.issn.0454-5648.20250409

基金

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浙江省自然科学基金(LY21E040001)
浙江省尖兵领雁研发攻关计划项目(2023C01112)

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2026年第54卷第5期

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文章信息

doi: 10.14062/j.issn.0454-5648.20250409

接收时间：2025-05-26
首发时间：2026-09-20
出版时间：2026-04-09

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出版历史

收稿日期：2025-05-26
修回日期：2025-07-17

基金

浙江省自然科学基金(LY21E040001)

浙江省尖兵领雁研发攻关计划项目(2023C01112)

作者信息

^1．湖州师范大学材料工程系，浙江湖州 313000

^2．浙江华源颜料股份有限公司，浙江湖州 313220

通讯作者:

潘国祥（1981—），男，博士，教授。

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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20250409

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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