Effect of Plasma on the Zeta Potential of Cotton Fabrics

In this work, the effect of a low-temperature plasma on the zeta potential of cotton fabric was studied. The silver particle absorption on cotton fabric when modified by a low-temperature plasma was also investigated. The modification consisted of plasma pre functionalization followed by a one-step wet treatment with silver nitrate solution. The process was performed in a low-temperature plasma medium, using a magnetron sputtering device. Oxygen and nitrogen were used as working gases in the system, and the results were compared. After preparing the samples, the zeta potentials of the untreated and plasma-treated cotton under a constant pH value solution were estimated and compared. Also, Fourier transform infrared spec troscopy （FTIR） was used to examine the functional groups of the corresponding samples. The amounts of silver absorption on plasma treated and untreated cotton were examined using the energy dispersive X-ray （EDX） method. The results show that the amount of zeta potential for the nitrogen plasma treated sample is less and the absorption of silver particles by cotton can be increased strongly with nitrogen plasma treatment.

利用碳化钙控制夹杂物变性的新方法

1前言 通常采用钙处理将铝镇静钢内的氧化铝夹杂物转变为铝酸钙。只要产生的CaS不太多，这一喂钙线调质处理可防止连铸水口堵塞，并改善可浇性。除了预防堵塞外，钙处理还可以对夹杂物进行变性以改善钢的性能。当前选择的钙处理技术就是喂入以Ca—Si和Ca或其混合物为主要填充材料的包芯线。本文提出了一种利用碳化钙使夹杂物变性的新方法。除了这种新产品使用过程中的实际问题外，文中还介绍了一些应用结果以及该方法在可浇性上产生的影响。