论文标题
浓饮酒的手动摩擦的流变设计
Rheological design of thickened alcohol-based hand rubs
论文作者
论文摘要
消费者对洗手液的手感和感觉感影响卫生结果。溢出可能导致剂量不足，感觉性能差会导致利用不足。我们首先提出了四个原理（低途径，可传播性，平滑度和不粘性），以设计具有可接受的手感和手感的浓饮酒基摩擦的流变学。然后，我们评估用微凝胶增稠（Carbopol 974p，Carbopol Ultrez 20和Sepimax Zen）或线性聚合物（Jaguar HP 120 COS）增厚的各种简化配方，并根据这些设计标准对其进行评估。所有四种添加剂都可以通过剪切稀释到$η\ 10^{ - 1} pa \，s $ at $ \dotγ\ sim 10^3 s^{ - 1} $来提供可接受的传播性。微凝胶（$σ_y\ gtrsim 10 pa $）赋予的有限屈服应力，或线性聚合物提供的低剪切粘度的增加（$η\ gtrsim 1 pa \，s $ at $ \dotγ\dotγ\dotγ\ lisssim 0.1 s^{ - 1} $）可从跑步降低。但是，使用线性聚合物的配方显示了毛细血管流变学中$τ_ {\ rm b} \大约1 s $的细丝断裂时间，这可能会导致粘性，因此比最佳的手感少。
The handleability and sensory perception of hand sanitisers by consumers affect the hygiene outcome. Spillage may result in under-dosing and poor sensory properties can lead to under-utilisation. We first propose four principles (low run off, spreadability, smoothness and non-stickiness) for designing the rheology of thickened alcohol-based hand rubs with acceptable handleability and hand feel. We then evaluate a commercial hand gel and a variety of simplified formulations thickened with microgels (Carbopol 974P, Carbopol Ultrez 20 and Sepimax Zen), or linear polymers (Jaguar HP 120 COS), and evaluate them against these design criteria. All four additives provide acceptable spreadability by shear thinning to $η\approx 10^{-1} Pa \, s$ at $\dotγ\sim 10^3 s^{-1}$. Either the finite yield stress conferred by the microgels ($σ_y \gtrsim 10 Pa$) or the increase in low-shear viscosity provided by the linear polymer ($η\gtrsim 1 Pa \, s$ at $\dotγ\lesssim 0.1 s^{-1}$) give rise to acceptably low run-off. However, the formulation using the linear polymer shows a filament breakage time of $τ_{\rm b} \approx 1 s$ in capillary rheology, which may result in stickiness and therefore a less than optimal hand feel.
