| 摘要: | 本研究中製備聚乙烯醇(PVA)與氫氧基磷灰石(HA)水凝膠複合材料，先將聚乙烯醇與氫氧基磷灰石混合加熱使聚乙烯醇完全溶於去離子水中，將其PVA/HA水溶液放入-20℃低溫冷藏箱中12小時，再移出室溫下解凍2小時，反覆此動作1~7次，得到PVA/HA水凝膠，並測試其冷凍解凍次數對此複合材料的機械性質、微結構分析與熱性質的變化。流變儀測試中發現，當加入氫氧基磷灰石後在相同冷凍解凍次數下提高了聚乙烯醇的儲存模數。且抗張測試得知，加入6%氫氧基磷灰石後隨著冷凍解凍次數增加，楊氏系數隨之上升，加入適量的氫氧基磷灰石確實提高聚乙烯醇水凝膠的強度。
In this paper, we present the polyvinyl alcohol (PVA)/hydroxyapatite (HA) hydrogel nanocomposite. First, we mix PVA and HA in the hot DI-water solution. Second, we put the solution in the-20 ℃ refrigerator for 12 hours, then take it out at room temperature to thaw for two hours. And hydrogel was obtained by repeating second step 1 to 7 times. The effect of freeze and thaw cycles on rheological properties, mechanical properties, micro structure, and thermal properties was discussed. In Advanced Rheometer testing, PVA storage modulus increased with the addition of HA under the same freezing defrosting frequency. In tensile testing, Young's modulus increased with increasing HA content and reached the maximum value at 6% HA content. |
