环氧大豆油基水溶性醇酸树脂的合成、表征及酯化动力学研究

doi:10.3969/j.issn.1001-1803.2021.11.007

Abstract

Abstract:

Epoxidized soybean oil （ESO）, trimethylolpropane （TMP）, phthalic anhydride （PA） and water-soluble monomer trimellitic anhydride （TMA） were used as the main raw materials to prepare water-soluble alkyd resin by alcoholysis, esterification and neutralization. With the static contact angle as the objective function, the synthesis conditions of water-soluble alkyd resin were optimized by the orthogonal experiment. The structure of the water-soluble alkyd resin was characterized. The results of Fourier transform infrared （FTIR） show that the water-soluble alkyd resin is successfully synthesized. The optimum conditions obtained by orthogonal test are as follows: the oil content is 40%; the alcohol excess is 1.2; the molar ratio of TMA to PA is 0.5∶1; the final acid value is controlled at 60-80 mg KOH/g. Through the transmittance testing and storage stability testing, the prepared water-soluble alkyd resin shows excellent water solubility and stability, indicating that epoxidized soybean oil can be used as the raw material for manufacture of waterborne alkyd coatings. The rotational rheological analysis shows that the water-soluble alkyd resin has good rheological properties and conforms to the pseudoplastic fluid. Esterification kinetics analysis shows that temperature has significant effect on the esterification reaction. With the increase of temperature, the reaction rate and conversion rate are significantly improved. The study on esterification kinetics finds that it conforms to the second-order reaction kinetics model, and the activation energy E_a of esterification reaction is 88.081 kJ/mol according to Arrhenius equation.

Key words: epoxidized soybean oil, alkyd resin, esterification kinetics, water solubility

CLC Number:

TQ658

Ma Baifeng,Zhen Weijun,Ouyang Chenguang,Abulajiang Yusupu,Ou Quansheng. Synthesis, characterization and esterification kinetics of epoxidized soybean oil based water soluble alkyd resin[J].China Surfactant Detergent & Cosmetics, 2021, 51(11): 1080-1087.

Figures/Tables 10

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References 23

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原料	w/%
ESO	42.79
TMP	23.24
PA	13.99
TMA	19.98
二甲苯	适量
三乙胺	适量
丙二醇甲醚	适量

因素标记	实验因素	水平
因素标记	实验因素	1	2	3
A	f	0.5:1	1:1	0.7:1
B	r	1.2	1.15	1.25
C	OL/%	50	40	45

水平	因素			接触角/（^o）
	A	B	C
	f	r	OL
1	1	1	1	53.9
2	1	2	2	64.0
3	1	3	3	57.2
4	2	1	2	49.0
5	2	2	3	65.9
6	2	3	1	65.5
7	3	1	3	57.0
8	3	2	1	59.8
9	3	3	2	58.7
K₁	58.37	53.3	59.73
K₂	60.13	63.23	57.23
K₃	58.5	60.47	60.03
R	1.77	9.93	2.8

温度/°C	反应级数	反应动力学拟合	反应速率常数k	线性相关系数R²
180	1	ln c_A=0.406-0.001 20x	0.001 20 min^-1	0.976
	2	1/c_A=0.629+0.001 09x	0.001 09 mol^-1·L·min^-1	0.993
	3	1/c_A²=0.304+0.002 17x	0.002 17 mol^-2·L²·min^-1	0.992
185	1	ln c_A=0.430-0.001 46x	0.001 46 min^-1	0.978
	2	1/c_A=0.608+0.001 40x	0.001 40 mol^-1·L·min^-1	0.985
	3	1/c_A²=0.269+0.002 76x	0.002 76 mol^-2·L²·min^-1	0.971
190	1	ln c_A=0.399-0.002 00x	0.002 00 min^-1	0.988
	2	1/c_A=0.618+0.002 05x	0.002 05 mol^-1·L·min^-1	0.992
	3	1/c_A²=0.248+0.004 30x	0.004 30 mol^-2·L²·min^-1	0.980
195	1	ln c_A=0.473-0.002 07x	0.002 07 min^-1	0.982
	2	1/c_A=0.539+0.002 21x	0.002 21 mol^-1·L·min^-1	0.984
	3	1/c_A²=0.058 8+0.004 90x	0.004 90 mol^-2·L²·min^-1	0.968
200	1	ln c_A=0.572-0.002 95x	0.002 95 min^-1	0.986
	2	1/c_A=0.470+0.002 98x	0.002 98 mol^-1·L·min^-1	0.987
	3	1/c_A²=-0.035 0+0.006 33x	0.006 33 mol^-2·L²·min^-1	0.959

Synthesis, characterization and esterification kinetics of epoxidized soybean oil based water soluble alkyd resin

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