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英语翻译成汉语，比较急，麻烦大神帮一下
The PEO teeth, grafted to the PAA backbone, exhibit three important merits. First, the presence of the PEO teeth, attached at random intervals along the PAA backbone, prevents large configuration changes in the solution or on the alumina surfaces in response to varying salt ionic concentrations. Second, the PEO teeth protect the underlying PAA backbone from ionic interactions that promote an aggregation of pure PAA species in solution or PAA-coated a-Al203 particles in suspension. Third, the PAA-PEO forms a double-decked adsorption configuration on the alumina surface. One is a PAA segment anchored in the alumina surface, and another is a charge-neutral PEO teeth grafted on the PAA backbone. This kind of double-decked adsorption configuration increases the adsorbed layer thickness, and it also increases the steric hindrance repulsion, therefore PAA- PEO has better dis-persion compared to PAA.
Figure 5 could be used to explain that the salt ion influenced the rheological properties of the PAA-a- A1203 suspension, and the PAA-PE0-a-Al203 suspension hindered this kind of effect. Figure 5(a) shows that, in the PAA-a-Al203 suspension system, the negatively -charged carboxylate groups (COCT) could combine with the posi-tively-charged Ca2+，and one Ca2+ could combine with two PAA segments by its two positive charges, so it could produce the Ca2+ bridging that led to a rapid aggregation of the alumina suspension, and therefore, the suspension became unstable. Figure 5(b) also shows that, in the PAA-PE0-a-Al203 suspension system, the negatively- charged carboxylate groups (COCT) also could combine with positively-charged Ca2+，but the Ca2+ could not combine with the two PAA segments due to the presence of the charge-neutral PEO teeth. These PEO teeth, grafted in the PAA backbone, produced a dense protec-tive comb layer, avoiding Ca2+ bridging, which led to rapid aggregation of the alumina suspension. The PAA-PE0-a-Al203 suspension has the very strongly resistant electrolytic performance. |
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