Poly(vinyl alcohol) (PVA)/glycerol hydrogel beads were created, using saturated boric acid and calcium chloride solution as the chemical crosslinking agents. The structure and properties of the PVA/glycerol hydrogel beads were studied. The results indicated that glycerol could improved the water absorption rate and the swelling rate at equilibrium. Also improved were the capillary water absorption capacity and the permeability of the PVA/glycerol hydrogel beads. The rheological tests showed that glycerol was able to improve the effective crosslinking density of the hydrogel beads. The amount of total water of the PVA/glycerol hydrogel beads slightly increased upon the addition of glycerol.

中文翻译：

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甘油对交联聚乙烯醇水凝胶微珠性能的影响

使用饱和硼酸和氯化钙溶液作为化学交联剂，制备了聚乙烯醇（PVA）/甘油水凝胶珠。研究了PVA /甘油水凝胶微珠的结构和性能。结果表明，甘油可以提高平衡时的吸水率和溶胀率。毛细管吸水能力和PVA /甘油水凝胶珠的渗透性也得到了改善。流变测试表明，甘油能够改善水凝胶珠粒的有效交联密度。加入甘油后，PVA /甘油水凝胶珠粒的总水量略有增加。