响应面法优化相变胶囊的包覆工艺

doi:10.3969/j.issn.1001-1803.2020.06.001

Abstract

Abstract:

Phase-change nanocapsules with high encapsulation efficiency and low toxicity were successfully prepared via interfacial free-radical polymerization, in which n-octadecane was used as core material and dipropylene glycol diacrylate （DPGDA） monomer was self-crosslinked to form the polymer shell. Response surface method （RSM） was applied to optimize the effects of ratio of core/shell, curing temperature and homogenization time on the encapsulation efficiency. Scanning electron microscope （SEM） images revealed that the nanocapsules thus obtained possessed spherical morphology. Fourier transform infrared spectroscopy （FT-IR） and differential scanning calorimetry （DSC） showed that the n-octadecane could be well encapsulated inside the nanocapsules under the optimized condition, and the encapsulation efficiency and loading capacity of the nanocapules were 90.6% and 30%, respectively. The thermal gravimetric analysis （TGA） of nanocapsules indicated that the phase-change nanocapsules had good thermostability up to 120 ℃. Additionally, cotton fabrics treated with the phase-change nanocapsules displayed good washing durability after 225 min washing, indicative of the potential application in thermo-regulated textiles for clothing to improve the thermal comfort of the wearer.

Key words: octadecane, self-crosslink, phase-change nanocapsule, response surface methodology, thermo-regulated textile

CLC Number:

TB383

CHEN Wen,WU Xiao-yuan,LI Xue-ting,LU Xi-hua,ZHANG Rui-yun. Optimization of encapsulation efficiency for nanoencapsulated octadecane by response surface method[J].China Surfactant Detergent & Cosmetics, 2020, 50(6): 359-365.

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References 20

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试验号	X₁ 芯壁比	X₂ 超声时间/min	X₃ 反应温度/℃	包埋率/%
1	3∶1	1	75	85.93
2	6∶1	10	75	77.28
3	4.5∶1	5.5	75	89.62
4	4.5∶1	5.5	75	90.20
5	4.5∶1	5.5	75	89.67
6	6∶1	5.5	90	69.13
7	4.5∶1	5.5	75	88.97
8	3∶1	10	75	84.09
9	6∶1	1	75	78.79
10	4.5∶1	5.5	75	89.99
11	4.5∶1	10	90	86.74
12	4.5∶1	1	60	84.90
13	3∶1	5.5	90	87.46
14	4.5∶1	1	90	84.02
15	4.5∶1	10	60	73.37
16	3∶1	5.5	60	87.74
17	6∶1	5.5	60	76.74

误差来源	平方和	自由度	均方	F值	P>F	显著性
模型	0.057	9	6.368×10^-3	5.18	0.020 6	*
X₁	0.023	1	0.023	19.06	0.003 3	—
X₂	1.848×10^-3	1	1.848×10^-3	1.50	0.259 6	—
X₃	2.640×10^-4	1	2.640×10^-4	0.21	0.657 0	—
X₁X₂	2.687×10^-6	1	2.687×10^-6	2.187×10^-3	0.964 0	—
X₁X₃	1.342×10^-3	1	1.342×10^-3	1.09	0.330 7	—
X₂X₃	5.070×10^-3	1	5.070×10^-3	4.13	0.081 7	—
X₁²	0.011	1	0.011	8.85	0.020 7	—
X₂²	4.015×10^-3	1	4.015×10^-3	3.27	0.113 5	—
X₃²	7.954×10^-3	1	7.954×10^-3	6.48	0.038 4	—
残差	8.597×10^-3	7	1.228×10^-3			—
失拟	8.509×10^-3	3	2.836×10^-3	129.29	0.000 2	*
误差	8.776×10^-5	4	2.194×10^-5
总	0.066	16
R²	0.869 6	R²_adj		0.701 8	CV/%	4.18

织物种类	拉伸强度/N	拉伸长度/mm	硬挺度/cm	撕破强度/CN
纯棉织物	206	26.7	1.75	579
相变胶囊处理后的织物	210	27.2	2.35	672

Optimization of encapsulation efficiency for nanoencapsulated octadecane by response surface method

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