Study on the selection of sealants statically casted in PVDF hollow fiber membranes

doi:10.3969/j.issn.1674-1951.2021.12.003

Abstract

Abstract:

The selection approach of epoxy resin adhesives statically casted into PVDF hollow fiber membrane modules is studied.Based on small-scale screening of epoxy resin adhesives,the adhesive sample suitable for scale-up tests is preliminarily elected according to the sample viscosity,heating temperature during mixing,hardness after curing,operation time,etc.In the small-scale test,the time of epoxy resin casting into the membrane module,the temperature of resin after the scale-up test and other properties are tested. Finally,the formula and casting conditions of the epoxy resin are obtained and its resistances to high-temperature,acid,alkali and oxidation are tested.The test results show that the epoxy resin GRN-B can meet the requirements of scale-up production and the actual applications.

Key words: static casting, epoxy resin, PVDF, hollow fiber, membrane separation technique

CLC Number:

X52：TK09

WANG Xiande, ZHAO Xiaodan, ZHANG Bofeng, LIU Bin, ZHANG Mengling, XUN Hongmin, WANG Jianhua. Study on the selection of sealants statically casted in PVDF hollow fiber membranes[J]. Huadian Technology, 2021, 43(12): 17-22.

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药品名称	规格	生产厂家
环氧树脂胶	—	购于不同厂家
柠檬酸	分析纯	北京北化精细化学品有限责任公司
氢氧化钠	分析纯	北京世纪红星化工有限责任公司
酒精	95%	现代东方（北京）科技发展有限公司
次氯酸钠	有效氯10%	北京市普林森环保科技有限公司

仪器名称	型号	生产厂家
旋转黏度计	NDJ-8S	上海舜宇恒平科学仪器有限公司
邵氏硬度计	SLX-D SLX-A	温州市山度仪器有限公司
电子天平	DT-1000A （精度0.1 g）	常熟市金羊砝码仪器有限公司
水银温度计	量程0~100 ℃ （精度0.1 ℃）	武强县威尔仪表厂
超级恒温槽	CH1006 （精度1.0 ℃）	上海衡平仪器仪表厂

项目	数据
混合起始黏度/（mPa⋅s）	500~4 000
黏度达到6 000 mPa⋅s的时间/min	120
固化硬度/D（肖氏硬度）	≥80
完全固化时间/d	≤10
耐温性/℃	≥50
耐化学性能	酸、碱、氧化剂