以聚乙烯醇（PVA）纺丝原液为分散介质，常温相变材料RT27石蜡为芯材，正硅酸乙酯（TEOS）为聚合单体形成SiO2囊壳，通过原位聚合直接制备含有石蜡微胶囊的PVA纺丝原液，之后通过湿法纺丝制备石蜡／PVA储能纤维。通过正交实验优化，结合粒径分布软件，分析各因素对微胶囊粒径的影响，选择适合纺丝的微胶囊合成条件。采用FTIR-ATR、SEM、EDS及TEM表征了纤维及微胶囊的化学成分及形态，通过DSC、TGA表征了微胶囊的包覆率、纤维的储能性及热稳定性。结果表明：PVA纺丝原液中合成了SiO2凝胶包裹的相变微胶囊，其平均粒径为1．39μm，大小及分布适合纺丝。纤维相变焓值为45．39J／g，石蜡包裹率高达94．72％，纺出纤维具有较高的储能性和较好的热稳定性。
Microcapsules containing paraffin as core and SiO2 as shell were synthesized in-situ in polyvinyl alcohol （PVA） spinning solution. Thus energy storage paraffin/PVA fibre was prepared via wet-spinning process. To get the optimum conditions for the synthesis of microcapsules, the orthogonal experimental design was used together with the particle size analysis software to analyze relevant factors of particle size. Chemical structures and morphologies of the microcapsules and the fibres were characterized by FTIR-ATR, SEM, EDS and TEM. DSC and TGA were adopted to determine the coated rate of microcapsules, the latent heat storage and thermal stability of the fibre. The results indicate that energy storage microcapsules are successfully synthesized in PVA spinning solution with a paraffin encapsulated ratio as high as 94.72V0, and the average particle size of 1.39 μm is suitable for wet- spinning. The paraffin/PVA fibre shows a relatively good thermal stability with a high latent heat of 45.39 J/g.
参考文献
| [1] | Zhang H Z, Wang X D, Wu D Z. Silica encapsulation of n-octadecane via sol-gel process: A novel microencapsulated phase-change material with enhanced thermal conductivity and performance[J]. Journal of Colloid and Interface Science, 2010, 343: 246-255. |
| [2] | 王立新,任晓亮,任丽,等.原位聚合法制备相变材料微胶囊及其致密性[J].复合材料学报,2006,23(2):53-58. |
| [3] | Huang L L, Sui W P, Wang Y X, et al. Preparation of chitosan/chondroitin sulfate complex microcapsules and application in controlled release of 5 -fluorouracils[J]. Carbohydrate Polymers, 2010, 80: 168-173. |
| [4] | You M, Zhang X X, Li W, et al. Effects of microPCMs on the fabrication of microPCMs/polyurethane composite foams [J]. Thermochimica Acta, 2008, 472(1/2): 20-24. |
| [5] | Ma S, Song G L, Li W, et al. UV irradiation-initiated MMA polymerization to prepare microcapsules containing phase change paraffin [J]. Solar Energy Materials & Solar Cells, 2010, 94: 1643-1647. |
| [6] | 常丽,姜猛进,王斌,等.聚丙烯腈/聚乙烯醇/石蜡储能纤维的制备及表征[J].合成纤维工业,2009,32(2):20-23. |
| [7] | 侯敏,俞吴,成时亮,等.聚乙二醇单甲醚/二醋酸纤维素相变纤维的制备及其热性能的研究[J].东华大学学报:自然科学版,2006,32(6):24-127. |
| [8] | Hong K J, Park S. Preparation of poly(L - lactide) microcapsules for fragrant fiber and their characteristics [J]. Polymer, 2000, 41: 4567-4572. |
| [9] | Kaul R K. Thermal insulating coating for spacecrafts: United States Patent, 6939610 [P]. 2005-09-06. |
| [10] | Onder E, Sarier N, Cimen E. Encapsulation of phase change materials by complex coacervation to improve thermal performances of woven fabrics [J]. Thermochimica Acta, 2008, 467(1/2): 63-72. |
| [11] | 展义臻,朱平,赵雪,等.环氧树脂型相变微胶囊的制备及其在海藻纤维中的应用[J].印染助剂,2007,24(3):23-26. |
| [12] | 陈亮,施江扬,储咏梅.Outlast空调纤维染色测色初探[J].毛纺科技,2010,38(2):25-27. |
| [13] | Jin Z G, Wang Y D, Liu J G, et al. Synthesis and properties of paraffin capsules as phase change materials [J]. Polymer, 2008, 49: 2903-2910. |
| [14] | 鄢瑛,刘剑,张会平.NaCl和分散剂对相变储能蜡微胶囊制备的影响[J].化学新型材料.2009,37(1):56-59. |
| [15] | 陈刚,刘光明,姚敬,等.TEOS含量对有机硅/SiO2杂化涂层性能的影响[J].腐蚀科学与防护技术,2010,22(5):418-422. |
| [16] | 赵凯,俞从正,马兴元.相变调温微胶囊的合成及其在皮革中的应用[J].中国皮革,2010,39(9):33-37. |
| [17] | 魏菊,刘向,于海飞.蓄热调温石蜡相变微胶囊的制备及性能[J].功能高分子学报,2010,23(1):73-77. |
| [18] | Fang G Y, Chen Z, Li H. Synthesis and properties of microencapsulated paraffin composites with SiO2 shell as thermal energy storage materials [J]. Chemical Engineering Journal, 2010, 163: 154-159. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%