本研究論文利用簡易的有機模板方法製備高比表面積的中孔洞氧化矽材料，並利用材料高吸水量的特性，應用於吸水除溼及循環再生領域中；以及氧化矽高生物相容性的優勢，應用於牙本質過敏症之治療。藉由選擇適當氧化矽源及調控適當水熱時間，合成出具有高比表面積且高吸水性的中孔洞氧化矽，接著引入海藻酸鈉黏著劑，將粉末狀之材料固化成球型，以利未來實際應用於除溼節能上。雖然中孔洞氧化矽之飽和吸水率高，但材料導熱係數低，導致脫附溫度偏高，不易利用太陽能熱源將材料吸附之水氣脫附並再生使用，因此結合導熱係數高的菱殼炭，與中孔洞氧化矽進行造粒，使複合材料的脫附再生溫度降低。本研究也成功大量製造公斤級的菱殼炭/中孔洞氧化矽孔洞複合材，此複合材可在一小時內吸附自身重量約10 wt%以上的水氣，其飽和吸水量可達18 wt%，而材料脫附溫度約41°C，對於未來量產製作並實用於工廠或家庭可再生之除溼商品，具可期待之效果。另外，本研究亦藉由異相成核之概念，將具有高生物相容性且高比表面積之中孔洞氧化矽於磷酸氫鈣的合成組成中。由於中孔洞氧化矽材料之表面性質，可形成顆粒較小且較易溶解之磷酸氫鈣晶體，使磷酸氫鈣/氧化矽複合材較易進入牙本質小管內進行封填。同時調控適當鈣磷比為約0.3，以利磷酸根離子作為前導離子，進入牙本質小管內形成磷酸鈣結晶，達到封填效果，有效治療牙本質過敏症。為了避免材料酸蝕牙本質小管，選擇適當的pH值在5.0以上；同時探討材料在不同pH值下的封填速度與相轉過程，進一步了解磷酸氫鈣在牙本質小管內的封填機制。

Porous materials are commonly used as adsorbents and biomaterials due to their high surface area, tunable pore size, and good biocompatibility. In this study, water chestnut shell biochar/mesoporous silica (WCSB/MS) composite and dicalcium phosphate dihydrate/mesoporous silica (DCPD/MS) composite were synthesized for low-temperature, energy-saving dehumidification and dentinal tubules occlusion applications, respectively. The pure mesoporous silica demonstrated a good water adsorption performance, but required a high desorption temperature. The desorption temperature was therefore reduced through the addition of porous water chestnut shell biochar with high thermal conductivity. The applicability of the resulting WCSB/MS for water adsorption-desorption loop applications was further improved by means of an alginate-calcium granulation process. The WCSB/MS composite demonstrated a rapid water adsorption and desorption rate. The results of a kinetics analysis showed that the adsorption and desorption processes followed a pseudo-first order kinetics model for the first 30 minutes of the adsorption-desorption loop. DCPD/MS with a nanoscale particle size was synthesized in a heterogeneous nucleation reaction. The feasibility of the DCPD/MS material for dentinal tubules occlusion shown that by controlling the calcium-phosphate ratio at 0.3 and the pH value at more than 5.0, the phosphate ions in the DCPD/MS composite were readily delivered into the dentinal tubules, prevented erosion of the dentinal tubules, and resulted in a rapid phase transformation of DCPD to more stable OCP. The DCPD/MS material showed a capping percentage of 25% and a crystallization depth of 14.6 μm in the dentinal tubules even after four months of storage; thereby confirming its inherent stability.

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