Microencapsulated pentadecane with nanocrystalline cellulose reinforced silane-acrylate shell for cold thermal energy storage application

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-12-10 DOI:10.1007/s00289-024-05579-1

Saurav Sarkar, Siddhesh Mestry, Jyoti Darsan Mohanty, S. T. Mhaske

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Abstract

The microencapsulated phase change material (MEPCM) contains n-pentadecane as core material and nanocellulose-reinforced silane-acrylate (NVS) as shell material synthesized by emulsion polymerization. Vinyl tri-methoxy silane (VTMS)-modified nanocellulose was used as a crosslinker (X-linker). The effect of novel crosslinking agent concentration on the phase change properties of microcapsules was examined. The pentadecane/NVS (MEPCMs) were analyzed by Fourier transform infrared spectroscopy (FT-IR), optical microscopy (OM), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC). The results showed that microcapsules were synthesized successfully, and the best performance was obtained in MEPCM at 16% X-linker loading in shell composition. FT-IR indicates that there are no chemical reactions between the core and shell of the MEPCMs. The optical micrograph shows that with an increasing amount of silane acrylate-based X-linker in the emulsion recipe, the size of the MEPCM agglomerate was increased. The average diameter of MEPCM at 16% X-linker content is 0.5–2.6 μm investigated by SEM. The encapsulation efficiency and enthalpy of phase change of the MEPCM increase with X-linker contents. For MEPCM, the highest phase change enthalpy is 75.72 J/g with a maximum encapsulation efficiency of 58.8% at 16% X-linker content calculated by DSC parameters. This study is practically helpful for the development of thermoregulating composite materials.

Graphical abstract

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纳米晶纤维素增强硅烷-丙烯酸酯壳微胶囊化十五烷的冷储热应用

以正戊烷为核心材料，以纳米纤维素增强硅烷丙烯酸酯（NVS）为壳层材料，采用乳液聚合法制备了微胶囊化相变材料（MEPCM）。采用乙烯基三甲氧基硅烷（VTMS）改性纳米纤维素作为交联剂（x -交联剂）。考察了新型交联剂浓度对微胶囊相变性能的影响。采用傅里叶变换红外光谱（FT-IR）、光学显微镜（OM）、扫描电镜（SEM）、热重分析（TGA）和差示扫描量热法（DSC）对MEPCMs进行了分析。结果表明，成功地合成了微胶囊，在壳组分中添加16% x -连接剂时，MEPCM的性能最佳。FT-IR表明mepcm的核壳之间不存在化学反应。光学显微图表明，随着乳液配方中硅烷丙烯酸酯基x -连接剂用量的增加，MEPCM团聚体尺寸增大。扫描电镜观察到，当x -连结剂含量为16%时，MEPCM的平均直径为0.5 ~ 2.6 μm。MEPCM的包封效率和相变焓随x -连接剂含量的增加而增加。通过DSC参数计算，MEPCM的相变焓最高为75.72 J/g，当x -连接剂含量为16%时，包封效率最高为58.8%。本研究对温控复合材料的开发具有实际意义。图形抽象

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."