硅酸盐学报

钙长石的表面改性及其对低密度聚乙烯的性能调控

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谢庆斌 ¹ , 曾佳敏 ¹ , 张庆成 ¹ , 唐武飞 ³ , 李天悦 ¹ , 张明轩 ² , 庄官政 ¹ , 袁鹏 ¹

硅酸盐学报 | 研究论文 2026,54(8): 2900-2909

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硅酸盐学报 |研究论文 2026 , 54 (8) : 2900 -2909

钙长石的表面改性及其对低密度聚乙烯的性能调控

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谢庆斌¹, 曾佳敏¹, 张庆成¹, 唐武飞³, 李天悦¹, 张明轩², 庄官政¹, 袁鹏¹

作者信息

^1．广东工业大学环境科学与工程学院，广州 510006

^2．江苏群鑫粉体科技股份有限公司，江苏扬州 225000

^3．湖南科技学院化学与生物工程学院，长沙 425199

通讯作者:

张庆成（1998—），男，博士研究生。

作者简介:

谢庆斌（2001—），女，硕士研究生。

Surface Modification of Anorthite and its Effect on Performance of Low-Density Polyethylene

Qingbin XIE¹, Jiamin ZENG¹, Qingcheng ZHANG¹, Wufei TANG³, Tianyue LI¹, Mingxuan ZHANG², Guanzheng ZHUANG¹, Peng YUAN¹

Affiliations

^1.School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China

^2.Jiangsu Qunxin Powder Technology Co., Ltd., Yangzhou 225000, Jiangsu, China

^3.College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Changsha 425199, China

Corresponding Author:

{ZHANG} Qingcheng (1998-), male, Doctoral candidate. E-mail: zhangqcheng@foxmail.com

XIE Qingbin (2001-), female, Master candidate. E-mail: qbin_xie@163.com

出版时间: 2026-07-14 doi: 10.14062/j.issn.0454-5648.20250657

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摘要

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为提升低密度聚乙烯（LDPE）作为结构材料的应用价值，选用天然硅酸盐矿物钙长石为增强相，采用γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH570）对其改性，并通过熔融共混工艺制备LDPE基复合材料，系统研究其力学性能、断面形貌和热稳定性。X射线光电子能谱等表征表明，KH570在An表面成功接枝，降低了颗粒表面能并改善了其与LDPE基体的界面相容性，使LDPE基复合材料断裂伸长率达296.34%，较LDPE提高104.39%；拉伸强度达10.24 MPa，提升38.01%；残炭量由0.07%增至15.05%。通过界面化学调控有效优化了钙长石表面特性，改善了LDPE的拉伸强度与热稳定性能，为开发矿物增强型LDPE基复合材料提供了新思路，在建筑、包装等领域具有应用潜力。

关键词

钙长石 / 表面改性 / 低密度聚乙烯基复合材料

Abstract

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Introduction

Low-density polyethylene (LDPE) is limited in its high-end applications due to insufficient mechanical and thermal properties. Using silicate minerals as fillers is an effective strategy, as they possess high modulus, thermal stability, and abundance. Anorthite (An), as a framework silicate mineral, is a highly promising candidate material. However, its hydrophilic surface is incompatible with the hydrophobic LDPE, thus hindering the performance. Silane coupling agent (i.e., KH570) can improve interfacial bonding, but its role in the An/LDPE system remains unclear. In this study, the effect of KH570-modified An on the LDPE performance was investigated, offering some insights into the development of high-performance LDPE composites and the efficient utilization of An resources.

Methods

The silane coupling agent KH570 was used to modify An. KH570 was hydrolyzed in an ethanol-water solution (7∶3 v/v) and reacted with An at 80 ℃ for 6 h. After centrifugation, washing, and drying, modified anorthite (K-An) was obtained. K-An/LDPE composites (in a mass ratio of 95 ∶ 5) were fabricated via melt blending with a twin-screw extruder (130-180 ℃) followed by hot pressing. The modification mechanism was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The morphology and dispersion were characterized by scanning electron microscopy (SEM). The surface wettability was determined by contact angle measurement. The mechanical properties were determined by tensile testing (ISO 527-1), and the thermal stability was determined by thermogravimetric analysis/derivative thermogravimetry (TG/DTG).

Results and discussion

KH570 effectively modifies the chemical properties of the surface of An without altering its crystal structure or morphology. The FT-IR and XPS spectra confirm the formation of covalent bonds, enhancing the hydrophobicity of the An surface and improving its dispersibility in LDPE. The mesoporous structure remains stable, and the distribution of small pores is improved, indicating a regulatory effect on the pore characteristics. The K-An/LDPE composite material exhibits excellent tensile strength, elongation, and thermal stability due to the rigidity of An, intense interfacial bonding, and thermal barrier effects, highlighting its potential as an LDPE reinforcing filler.

Conclusions

KH570 could react with -OH groups on the surface of An to form stable bonds, reducing surface polarity, while preserving its crystal morphology, thereby lowering the interfacial energy difference with LDPE and enhancing compatibility. As a result, K-An/LDPE composites modified with KH570 showed enhanced tensile strength, elongation at break, tensile modulus and thermal residue, which could be increased by 38.01%, 104.39%, 48.32%, and 15.05%, respectively. This was attributed to the rigidity and thermal stability of the An framework, intense interfacial bonding, and a uniform thermal barrier network.

Key words

anorthite / surface modification / low-density polyethylene composite materials

引用本文

谢庆斌, 曾佳敏, 张庆成, 唐武飞, 李天悦, 张明轩, 庄官政, 袁鹏. 钙长石的表面改性及其对低密度聚乙烯的性能调控. 硅酸盐学报, 2026 , 54 (8) : 2900 -2909 . DOI: 10.14062/j.issn.0454-5648.20250657

Qingbin XIE, Jiamin ZENG, Qingcheng ZHANG, Wufei TANG, Tianyue LI, Mingxuan ZHANG, Guanzheng ZHUANG, Peng YUAN. Surface Modification of Anorthite and its Effect on Performance of Low-Density Polyethylene[J]. Journal of the Chinese Ceramic Society, 2026 , 54 (8) : 2900 -2909 . DOI: 10.14062/j.issn.0454-5648.20250657

基金

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贵州省科技支撑计划项目(2024031)
国家自然科学基金(42302032)

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2026年第54卷第8期

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文章信息

doi: 10.14062/j.issn.0454-5648.20250657

接收时间：2025-09-05
首发时间：2026-10-22
出版时间：2026-07-14

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出版历史

收稿日期：2025-09-05
修回日期：2025-09-23

基金

贵州省科技支撑计划项目(2024031)

国家自然科学基金(42302032)

作者信息

^1．广东工业大学环境科学与工程学院，广州 510006

^2．江苏群鑫粉体科技股份有限公司，江苏扬州 225000

^3．湖南科技学院化学与生物工程学院，长沙 425199

通讯作者:

张庆成（1998—），男，博士研究生。

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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20250657

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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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