Synthesis of Lignin Based Epoxy Acrylate and Its UV-curing Research†

doi:10.7503/cjcu20150951

Chem. J. Chinese Universities ›› 2016, Vol. 37 ›› Issue (3): 426.doi: 10.7503/cjcu20150951

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Synthesis of Lignin Based Epoxy Acrylate and Its UV-curing Research^†

YANG Dalei, ZHANG Niaona, HU Qiuxue, WEI Yingcong, YAN Ru, ZHANG Mingyao, ZHANG Huixuan, HU Wei^*()

Chemical Engineering Institute, Changchun University of Technology, Changchun 130021, China

Received:2015-12-14 Online:2016-03-10 Published:2016-01-30
Contact: HU Wei E-mail:huwei@ccut.edu.cn
Supported by:
† Supported by the National Natural Science Foundation of China(No.21404013), the Science and Technology Development Plan of Jilin Province, China(No.20130521003JH, 20140204039GX), the Changchun Science and Technology Plan Project, China(No.14KG105) and the Research Project of Science and Technology of the Education Department of Jilin Province During the 12th Five-year Plan Period, China(No.2015-78)

Abstract

Abstract:

Lignin was used as a monomer to synthesize the lignin based epoxy acrylates prepolymer(LBEA) with epoxy and acrylic acid. The obtained LBEA was UV cured into membrane to explore its application as paintings. The reaction process was studied by the epoxy index and acid number depending on the lignin ratio. Infrared spectroscopy(IR) proved that the LBEA was synthesized successfully. The performance of LBEA membrane, such as hardness, flexibility and acid and base resistance was characterized, and was better than that of epoxy acrylate.

Key words: Lignin, Epoxy acrylate, UV curing

CLC Number:

O631

TrendMD:

YANG Dalei, ZHANG Niaona, HU Qiuxue, WEI Yingcong, YAN Ru, ZHANG Mingyao, ZHANG Huixuan, HU Wei. Synthesis of Lignin Based Epoxy Acrylate and Its UV-curing Research^†[J]. Chem. J. Chinese Universities, 2016, 37(3): 426.

Figures/Tables 5

Scheme 1 Synthesis routes of lignin based epoxy acrylic resin

Table 1 Reaction time of LBEA with different lignin content in the first reaction step

w(Lignin)(%)	Reaction time of LBE/min		Reaction time of LBEA/min
w(Lignin)(%)	80 ℃		100 ℃
0			250
5	120	125	90
10	120	75	70
15	120	70	55
20	100		40
25	60		35

Fig.1 Variation of Epoxy Index of LBE(A) and acid value of LBEA(B) of different lignin ratio with the

Fig.2 IR spectra of lignin(a), epoxy resin(b), EA(c), LBE and LBEA with different lignin content(d—i) in the two reaction stepsw(Lignin) of LBE(%): d. 5, e. 10, f. 15; w(Lignin) of LBEA(%): g. 5, h. 10, i. 15.

Table 2 Performance of UV curing membrane[m(IBOA)/m(TPGDA)=1∶1, the total ratio: 30%]

w(Lignin)(%)	w(Gel)(%)	Hardness	Adhesion	Flexibility/mm	Acid and base resistance(12 h)
0	98.7	HB	5	12	Surface bleached
5	96.4	3H	1	4	Surface bleached slightly
10	94.3	3H	1	5	Surface gloss decreased
15	90.6	2H	2	6	No change
20	87.5	2H	3	6	No change
25	83.2	H	4	8	No change

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Synthesis of Lignin Based Epoxy Acrylate and Its UV-curing Research^†

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