应用于聚合物复合弹性体柔性封装的阳极键合

赵浩成; 梁芳楠; 刘茜秀; 周琨; 尤雪瑞; 梁春平; 张志超

doi:10.13801/j.cnki.fhclxb.20200519.002

应用于聚合物复合弹性体柔性封装的阳极键合

doi: 10.13801/j.cnki.fhclxb.20200519.002

山西能源学院　机电工程系，晋中 030600

基金项目: 国家自然科学基金(51875384)；山西省应用基础研究资助项目(201801D221102)；山西省高等学校科技创新资助项目(201802111)

详细信息

通讯作者:
赵浩成，博士，讲师，研究方向为功能高分子材料的开发　E-mail：zhaohc4666@163.com

中图分类号: TB34; TG496
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-26
- 录用日期: 2020-05-05
- 网络出版日期: 2020-05-19
- 刊出日期: 2021-01-15

Anodic bonding applied to flexible packaging using polymer elastomer composites

Department of Mechanical and Electrical Engineering, Shanxi Institute of Energy, Jinzhong 030600, China

摘要

摘要: 采用预聚体法制备了三种应用于阳极键合柔性封装的聚合物复合弹性体(PEO-PUEs)阴极材料，并在室温下浇注固化。PEO-PUEs复合材料具有良好的耐热性和柔顺性，5%热分解温度T_d,5%高于250℃，玻璃化转变温度T_g低于−40℃，且力学性能良好。当1,4-丁二醇(BDO)含量为50wt%、三羟甲基丙烷(TMP)含量为50wt%、SiO₂含量为1wt%时，PEO-PUEs复合材料在阳极键合温度下(65℃)具有较高的离子导电率，PEO-PUEs复合材料的离子导电率最高可达1.50×10⁻³ S·cm⁻¹，符合阳极键合对阴极材料的要求。设计了专用于聚合物复合材料的热引导动态场阳极键合工艺，并成功应用于PEO-PUEs复合材料与Al箔的阳极键合连接，当BDO含量为50wt%、TMP含量为50wt%、SiO₂含量为1wt%时，PEO-PUEs复合材料和Al箔阳极键合的连接性能最好，键合界面拉伸强度达1.26 MPa。通过与传统阳极键合工艺对比，热引导动态场阳极键合具有稳定致密的中间键合层，峰值电流和键合时间明显增大，键合界面强度高。本研究从制备聚合物阴极材料和设计相应的阳极键合工艺两个方面，为阳极键合在柔性封装的实际应用提供一些理论基础和参考经验。
- 阳极键合 /
- 聚氨酯弹性体 /
- 离子导电性 /
- 柔性封装 /
- 聚合物电解质
Abstract: Three kinds of polymer elastomer (PEO-PUEs) composites as cathode materials for anodic bonding were prepared via pre-polymerization method casted and cured at room temperature. The PEO-PUEs composites were characterized by good heat resistance that the 5% thermal decomposition temperatures T_d,5% are higher than 250℃. The glass transition temperatures T_g are lower than −40℃ showing good flexibility. The PEO-PUEs composites have good mechanical properties. All PEO-PUEs composites have high ionic conductivity meeting the requirements of anodic bonding for cathode materials, and the highest value at 65℃ (the temperature required for anodic bonding) is reached to 1.50×10⁻³ S·cm⁻¹ for PEO-PUEs composites (butane-1,4-diol (BDO) content is 50wt%, trimethylolpropane (TMP) content is 50wt% and SiO₂ content is 1wt%). The anodic bonding by thermal guidance and dynamic field for polymer materials was designed, which was successfully used for jointing of PEO-PUEs composites with Al foil. When BDO content is 50wt%, TMP content is 50wt% and SiO₂ content is 1wt%, the PEO-PUEs composites with Al foil have the best bonding performance, and the highest value of tensile strength can reach to 1.26 MPa. Compared with the traditional anodic bonding, the joint of PEO-PUEs composites with Al by anodic bonding designed with thermal guidance and dynamic field have a stable and dense intermediate bonding layer, and the peak current and bonding time are significantly improved, and the bonding interface strengthes are higher. This study provides some theoretical basis and reference experience for the practical application of anodic bonding in flexible packaging from the aspects of preparing polymer cathode materials and designing the corresponding anodic bonding process.
- anodic bonding /
- polyurethane elastomer /
- ionic conductivity /
- flexible packaging /
- polymer electrolyte

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图 1 聚合物复合弹性体阴极材料(PEO-PUEs)的制备工艺流程图

Figure 1. Fabrication process flow chart of polymer elastomer composites (PEO-PUEs)

PEO—Poly(ethylene oxide); DCM—Dichloromethane; LiTFSI—Lithium bis (trifluoromethanesulphonyl) imide; PTMG—Poly (tetrahydrofuran); TDI-100—2,4-Toluene diisocynate; BDO—Butane-1,4-diol; TMP—Trimethylolpropane

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图 2 PEO-PUEs复合材料的FTIR图谱

Figure 2. FTIR spectra of PEO-PUEs composites

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图 3 PEO-PUEs复合材料表面的SEM图像

Figure 3. SEM images of surface of PEO-PUEs composites

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图 4 PEO-PUEs复合材料的TGA (a)和DSC曲线(b)

Figure 4. TGA (a) and DSC (b) curves of PEO-PUEs composites

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图 5 PEO-PUEs复合材料在65℃的交流阻抗图谱

Figure 5. Electrochemical impedance spectroscopy (EIS) of PEO-PUEs composites at 65℃

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图 6 热引导动态场阳极键合(PEO-PUEs/Al)和传统阳极键合(PEO-PUEs/Al*)的时间-电流曲线

Figure 6. Time-current curves of anodic bonding designed with thermal guidance and dynamic field (PEO-PUEs/Al) and traditional anodic bonding (PEO-PUEs/Al*)

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图 8 PEO-PUEs/Al和PEO-PUEs/Al*键合界面的SEM图像

Figure 8. SEM images of bonding interface of PEO-PUEs/Al and PEO-PUEs/Al*

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图 7 PEO-PUEs/Al阳极键合示意图

Figure 7. Schematic diagram of anodic bonding of PEO-PUEs/Al

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表 1 PEO-PUEs复合材料配方

Table 1. Formula composition of PEO-PUEs composites

Sample	NCO group of prepolymer/wt%	Chain extension coefficient	PEO based electrolyte/wt%	Composition of chain extender		SiO₂/wt%
Sample	NCO group of prepolymer/wt%	Chain extension coefficient	PEO based electrolyte/wt%	BDO/wt%	TMP/wt%	SiO₂/wt%
PEO-PUE1	6	0.9	10	100	0	0
PEO-PUE2	6	0.9	10	50	50	0
PEO-PUE3	6	0.9	10	50	50	1
Note: The content of SiO₂ is calculated in terms of different percentages mass of prepolymer.

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表 2 PEO-PUEs复合材料的热性能和离子导电率

Table 2. Thermal properties and ionic conductivities of PEO-PUEs composites

Sample	T_d,5%/ ℃	T_g/ ℃	Bulk resistance/Ω	Ionic conductivity/ (10⁻³ S·cm⁻¹)
PEO-PUE1	254	−49.54	90.92	1.10
PEO-PUE2	267	−46.81	76.11	1.31
PEO-PUE3	275	−42.78	66.72	1.50
Notes: T_d,5%—5% thermal decomposition temperature; T_g—Glass transition temperature.

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表 3 PEO-PUEs复合材料的力学性能

Table 3. Mechanical properties of PEO-PUEs composites

Sample	Shore A hardness	Tensile strength/MPa	Tear strength/MPa	Elongation at break/%
PEO-PUE1	27±2	3.5±0.3	8.9±0.7	441±16
PEO-PUE2	34±2	4.7±0.3	9.4±0.7	385±16
PEO-PUE3	39±2	5.8±0.3	10.7±0.7	331±16

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表 4 PEO-PUEs/Al和PEO-PUEs/Al*的峰值电流、键合时间和界面强度

Table 4. Peak current, bonding time and interface strength of PEO-PUEs/Al and PEO-PUEs/Al*

Sample	Peak current/mA	Bonding time/s	Tensile strength/MPa	Sample	Peak current/mA	Bonding time/s	Tensile strength/MPa
PEO-PUE1/Al	10.4	77.8	0.85	PEO-PUE1/Al*	9.5	46.0	0.11
PEO-PUE2/Al	13.7	86.0	1.09	PEO-PUE2/Al*	11.8	50.0	0.15
PEO-PUE3/Al	15.3	93.8	1.26	PEO-PUE3/Al*	13.8	54.1	0.23

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