Amphiphilic carbon dots (ACDs) were synthesized from nonionic surfactant alkyl glycosides with different alkyl chains by a low-cost method. Moreover, the surface activity of these ACDs (C₆-ACDs, C₁₀-ACDs, and C₁₂₁₄-ACDs) was investigated. These ACDs have similar surface tension curves as surfactants, and the surface activity of these ACDs also increases with the alkyl chain length of raw materials. Among these ACDs, C₁₂₁₄-ACDs have the lowest critical micelle concentration (CMC) of 40.00 mg/L, a fifth of the raw material (APG1214). The surface tension of C₁₂₁₄-ACDs is not easily affected by the change in pH. In addition, C₁₂₁₄-ACDs have excellent temperature-resistant and salt-tolerant properties. The interfacial tension of crude oil-water is reduced from 26.59 mN/m to 0.68 mN/m by C₁₂₁₄-ACDs. Furthermore, C₁₂₁₄-ACDs maintains high interfacial activity at c_NaCl = 200 g/L and c_CaCl2 = 50 g/L, reducing interfacial tension to 0.054 mN/m and 0.048 mN/m.

C₁₂₁₄-ACDs have high oil removal efficiency. After treatment with APG1214, C₆-ACDs, C₁₀-ACDs, and C₁₂₁₄-ACDs, the area of the oil film is reduced by 51.0%, 46.6%, 56.2%, and 78.1%, respectively. Moreover, APG1214 and C₁₂₁₄-ACDs reduce the contact angle of water droplets from 107.4° to 60.5° and 45.6°, respectively, indicating the wettability alternation of C₁₂₁₄-ACDs is better than raw material APG1214. Finally, the oil displacement efficiency of C₁₂₁₄-ACDs is 16.6% in the presence of 85 g/L NaCl and 10 g/L CaCl₂. Therefore, as temperature-resistant and salt-tolerant nanoparticles with an ultra-small size, ACDs have broad application prospects in enhancing oil recovery in high-temperature and high-salt reservoirs.

以不同烷基链的非离子表面活性剂烷基糖苷为原料，采用低成本方法合成了两亲性碳点（ACD）。此外，研究了这些ACD(C ₆ -ACD、C ₁₀ -ACD和C ₁₂₁₄ -ACD)的表面活性。这些ACD具有与表面活性剂相似的表面张力曲线，并且这些ACD的表面活性也随着原料烷基链长度的增加而增加。其中，C ₁₂₁₄ -ACD 的临界胶束浓度 (CMC) 最低，为 40.00 mg/L，是原料 (APG1214) 的五分之一。 C ₁₂₁₄ -ACDs的表面张力不易受pH变化的影响。此外，C ₁₂₁₄ -ACD具有优异的耐温、耐盐性能。 C ₁₂₁₄ -ACD将原油-水的界面张力从 26.59 mN/m 降低至 0.68 mN/m 。此外，C _{1214 -ACDs在}c _NaCl  = 200 g/L和c _CaCl2 = 50 g/L时保持高界面活性 ，将界面张力降低至0.054 mN/m和0.048 mN/m。

C ₁₂₁₄ -ACD 具有较高的除油效率。经过APG1214、C ₆ -ACDs、C ₁₀ -ACDs和C ₁₂₁₄ -ACDs处理后，油膜面积分别减少了51.0%、46.6%、56.2%和78.1%。此外，APG1214和C ₁₂₁₄ -ACDs将水滴的接触角分别从107.4°降低到60.5°和45.6°，表明C ₁₂₁₄ -ACDs的润湿性变化优于原料APG1214。最终，在85 g/L NaCl和10 g/L CaCl ₂存在下， C ₁₂₁₄ -ACDs的驱油效率为16.6% 。因此，ACD作为超小尺寸的耐温、耐盐纳米颗粒，在高温高盐油藏提高采收率方面具有广阔的应用前景。