Cetyltrimethylammonium bromide ctab

Poly(butylene adipate-co-terephthalate) (PBAT) with a melt index of 5 (190 °C, 2.16 kg) was supplied by BASF (Shanghai, China). Magnesium chloride hexahydrate (MgCl₂·6H₂O), sodium hydroxide (NaOH), and cetyltrimethylammonium bromide (CTAB) were obtained from J&K (Shanghai, China).

Poly(4-vinylpyridine) resin (25% cross-linkage, 10‒50 mesh) was purchased from Sigma-Aldrich Company in Shanghai, China. Commercial resins of D201, D205, D213, D314, D319 and D730 were provided by Zhengguang Industrial Co., Ltd. in Zhejiang, China. Tetraphenylboron sodium standard solution (TS) was purchased from Huaian Huake Chemical Co., Ltd. in Jiangsu, China. Iodomethane, 1-iodohexane, methanol, absolute ethanol, acetone, acetonitrile, cetyltrimethylammonium bromide (CTAB), formaldehyde solution (33 wt.%), sodium hydroxide and titan yellow were all chased from J&K Company in Beijing, China. All the above reagents were of analytical grade, and used without further purification. Escherichia coli (E. coli, ATCC8099) and Staphylococcus aureus (S. aureus, ATCC25923) were purchased from Guangdong Huankai Microbial Sci. & Tech. Co., Ltd. in Guangzhou, China.