DLVO Theory
V_total = V_vdW + V_EDL
V_vdW = −A·R/(12h)
V_EDL = 64πRc₀kT·κ⁻¹·γ²e^(−κh)
κ⁻¹ = Debye length ∝ 1/√c
Coalescence stability
Energy barrier > 15kT → stable
Add salt → screens charge → destabilize
Ostwald ripening: small → big
rate ∝ γV_m D c∞/(rRT)
V_total = V_vdW + V_EDL
V_vdW = −A·R/(12h)
V_EDL = 64πRc₀kT·κ⁻¹·γ²e^(−κh)
κ⁻¹ = Debye length ∝ 1/√c
Coalescence stability
Energy barrier > 15kT → stable
Add salt → screens charge → destabilize
Ostwald ripening: small → big
rate ∝ γV_m D c∞/(rRT)