Abstract The hydrophobic mechanism of 3-hexyl-4-amino-1, 2, 4-triazole- 5-thione (HATT) to malachite (Cu2CO3(OH)2) was investigated by contact angle, micro-flotation, zeta potential, Fourier transform infrared (FTIR) spectroscopy, time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectra (XPS). After HATT modification, the wettability of malachite surfaces was changed from hydrophilicity to hydrophobicity, and its zeta potential moved to more negative values, demonstrating that HATT might adsorb on the positively charged copper species via its anionic amino-triazole-thione group with leaving its hexyl group against malachite surfaces. The hydrophobized malachite particles attached selectively to air bubbles and subsequently moved to the pulp surface with the bubbles. FTIR and ToF-SIMS indicated that HATT might chemisorb on malachite surfaces by formation of Cu-S and Cu-N bonds with the breakage of S-H bond in HATT thiol tautomer. XPS further elucidated that a five- membered-ring HATT-Cu(I) surface complex was formed by bonding the exocyclic S and N atoms of HATT with the copper atom on malachite surfaces.

中文翻译：

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通过 ToF-SIMS、XPS、FTIR、接触角、zeta 电位和微浮选了解 3-hexyl-4-amino-1, 2,4-triazole-5-thione 对孔雀石的疏水机制

摘要 采用接触角、微浮选、zeta电位、傅立叶等方法研究了3-己基-4-氨基-1,2,4-三唑-5-硫酮(HATT)对孔雀石(Cu2CO3(OH)2)的疏水机理。变换红外 (FTIR) 光谱、飞行时间二次离子质谱 (ToF-SIMS) 和 X 射线光电子能谱 (XPS)。HATT 改性后，孔雀石表面的润湿性由亲水性变为疏水性，其 zeta 电位移动到更负的值，表明 HATT 可能通过其阴离子氨基-三唑-硫酮基团吸附在带正电荷的铜物种上，并留下其己基组反对孔雀石表面。疏水化的孔雀石颗粒选择性地附着在气泡上，随后随着气泡移动到纸浆表面。FTIR 和 ToF-SIMS 表明 HATT 可能通过形成 Cu-S 和 Cu-N 键以及 HATT 硫醇互变异构体中的 SH 键断裂而化学吸附在孔雀石表面。XPS 进一步阐明了五元环 HATT-Cu(I) 表面复合物是通过将 HATT 的外环 S 和 N 原子与孔雀石表面上的铜原子结合形成的。