Thermoregulating and durable lyocell fibers enabled by high-encapsulation-efficiency phase change microcapsules

IF 4.8 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2026-04-19 DOI:10.1007/s10570-026-07032-0

Zhijie Gao, Yueting Wu, Zexin Lin, Peiyu Cui, Caiyue Le, Junlong Yao, Xiaobo Ye, Bin Fang, Yani Guo, Yimin Sun

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Abstract

In this study, high-core-content microencapsulated phase change materials (MPCMs) were synthesized and incorporated into lyocell fibers to develop thermoregulating fiber composites with excellent energy storage performance. By optimizing the emulsification system with 6 wt% styrene–maleic anhydride (SMA) as the emulsifier, uniform MPCMs with a low breakage rate and an encapsulation efficiency of 93.4% were obtained, exceeding the typical range (62.9–85.3%) reported for MF-based microcapsules. The MPCMs were homogeneously dispersed into lyocell spinning dope, and composite fibers with 20 wt% MPCMs exhibited superior thermoregulating properties, including a melting enthalpy of 22.8 J/g and a crystallization enthalpy of 24.6 J/g. The fibers maintained over 98% of their latent heat after 100 thermal cycles and more than 82% after 100 cycles of water and alkali washing, demonstrating excellent thermal reliability and washing durability. They also exhibited strong UV resistance and retained stable thermal and mechanical performance after dynamic wearable testing, confirming their promising durability for practical applications. TGA showed enhanced thermal stability, and infrared thermography confirmed a ~ 120 s cooling delay compared with pristine lyocell. These findings present a scalable and eco-friendly strategy for producing durable thermoregulating lyocell fibers for smart textile applications.

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温度调节和耐用的莱赛尔纤维使高封装效率的相变微胶囊

本研究合成了高芯含量微胶囊化相变材料（MPCMs），并将其掺入lyocell纤维中，开发出具有优异储能性能的热调节纤维复合材料。以6 wt%的苯乙烯-马来酸酐（SMA）为乳化剂，对乳化体系进行优化，获得了均匀的mpcm，破碎率低，包封效率为93.4%，超过了基于mf的微胶囊的典型范围（62.9-85.3%）。mpcm均匀分散在lyocell纺丝液中，当mpcm含量为20%时，复合纤维的熔融焓为22.8 J/g，结晶焓为24.6 J/g，具有优异的温度调节性能。在100次热循环后，纤维保持了98%以上的潜热，在100次水和碱洗涤后保持了82%以上的潜热，表现出优异的热可靠性和洗涤耐久性。在动态可穿戴测试后，它们还表现出很强的抗紫外线性能，并保持稳定的热性能和机械性能，证实了它们在实际应用中的耐久性。热重分析表明，与原始lyocell相比，热稳定性增强，红外热像图证实冷却延迟约120 s。这些发现提出了一种可扩展和环保的策略，用于生产用于智能纺织品的耐用温度调节莱赛尔纤维。

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.