Effects of concentration of PVB, clearance of scraper, temperature of gelling bath and concentration of acetic acid additive on membrane performance were investigated.
研究了PVB本体浓度、制膜间隙、凝胶浴温度以及乙酸添加剂等因素对PVB不对称超滤膜性能的影响；
Methods: analgesic test with water bath, writhes induced by acetic acid, tickling induced by histamine and capillary permeability increase tests were applied.
方法：采用温浴甩尾法和扭体法镇痛试验、毛细血管通透性试验、 组胺致瘙痒等药理模型。
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