外文翻译----壳聚糖聚乙烯醇复合水凝胶的制备(编辑修改稿)

外文翻译----壳聚糖聚乙烯醇复合水凝胶的制备(编辑修改稿)内容摘要：

ion. Then, the crosslinker reagent (GA) was slowly added under constant stirring. The final concentration of GA in the gel solution precursors was 1% and 5% (wt%). Further in thesequence, the solution was poured into plastic moulds and let drying for 72–120 h at room temperature, and finally dried at 40℃ for 24 h (constant weight). Chitosan/PVA samples chemically crosslinked were identified by (X:Y:Z) that is, X as chitosan content, Y as PVA content, and Z as GA (wt%). For instance, sample identified as Chi/PVA/GA (1:3:1) represents the following proportion of reagents: 25% chitosan, 75% PVA and crosslinked with % GA (wt%). The dried gel was stored in a desiccator before all subsequent characterization procedures. Swelling test Fluid absorption studies are of paramount importance for preliminary analysis of biodegradable materials. For fluiduptake measurements, all the specimens of the chitosan/PVA hydrogels with molarratios of 0:1, 1:3, 1:1, 3:1, and 1:0 were prepared as described in the previous section, were weighed (W0) before being immersed in SBF at 37℃ . After immersion for different time periods, the samples were carefully removed from the medium and, after wiping off water excess on the surface with filter paper, they were weighed for the determination of the wet weight (Wf) as a function of the immersion time [9]. SBF absorption (S) is given bythe eq. 100 O OfW WWS Each SBF absorption experiment was repeated three times and the average value was taken to validate theresults. Swelling test Swelling experiments were conducted with Chi/PVA blends, with different polymer proportions and crosslinkedby GA. A typical swelling behavior is shown in performed f。