本文選題：納米碳酸鈣 + 貝殼結構��； 參考：《華北理工大學》2015年碩士論文

【摘要】：對于仿生材料的研究,長久以來都是材料研究的熱點。近年來,貝殼因為其特殊的結構和良好的性能受到人們越來越多的關注。組成貝殼的成分主要為碳酸鈣和有機糖類。采用掃描電鏡、紅外光譜和X射線衍射分析了貝殼的微觀結構和組成。不同種類的貝殼結構略有不同,但整體表現(xiàn)為三層,由外層到內(nèi)層為角質(zhì)層、棱柱層和珍珠層。試驗研究的貝殼珍珠層成分為文石薄片,結構表現(xiàn)為文石片的堆砌。多個平行的文石片呈一組,組與組間呈平面和空間相互垂直關系。采用微乳液法和碳化法兩種方法制備出了納米碳酸鈣。微乳液法中,微乳液的組成不同,得到的碳酸鈣晶型也不同,且對所得的碳酸鈣的顆粒尺寸有一定影響。水相含量高時,易得到文石型碳酸鈣,水相含量低時,易得到方解石型碳酸鈣。碳化法中,不加Mg Cl2時,得到的是方解石型碳酸鈣,加入Mg Cl2的但應得到文石型碳酸鈣�？傮w來說,微乳液法得到的碳酸鈣的顆粒尺寸略小于碳化法得到的碳酸鈣的顆粒尺寸。以制備的納米碳酸鈣為原料,用層層組裝法和旋涂法制備碳酸鈣和有機物的復合材料。兩種方法均可得到納米碳酸鈣-有機物復合材料,其中,旋涂法操作更方便。以Ca(OH)2和糖類有機物為原料,通過碳化法制備了碳酸鈣-糖類復合材料,并測定了其顯微硬度。產(chǎn)物為方解石型碳酸鈣-有機物復合材料,且糖的種類和含量對材料的顯微硬度由一定影響。在試驗條件下,當糖類為直鏈淀粉,含量為4%時,顯微硬度最高。
[Abstract]:For a long time, the research of biomimetic materials has been a hot spot of material research. In recent years, shell has attracted more and more attention because of its special structure and good performance. The main components of the shell are calcium carbonate and organic sugar. The microstructure and composition of shell were analyzed by SEM, IR and X ray diffraction. The shell structure of different species is slightly different, but the whole shell consists of three layers, from outer layer to inner layer, cutin layer, prism layer and pearl layer. The structure of the shell pearl layer is composed of flake stone, and the structure of the shell is stacked. Several parallel pieces of stone are formed in a single group, with a plane and spatial perpendicular relationship between the groups. Nanometer calcium carbonate was prepared by microemulsion method and carbonation method. In the microemulsion method, the composition of the microemulsion is different, the crystal form of calcium carbonate is also different, and the particle size of the obtained calcium carbonate is affected to some extent. Calcite calcium carbonate is easy to be obtained when the content of water phase is high and calcite calcium carbonate is easy to be obtained when the content of water phase is low. The calcite type calcium carbonate is obtained without adding MgCl _ 2 in the carbonization process, but the aragonite type calcium carbonate should be obtained by adding MgCl _ 2. In general, the particle size of calcium carbonate obtained by microemulsion method is slightly smaller than that of calcium carbonate obtained by carbonation method. The composite materials of calcium carbonate and organic compounds were prepared by layer-by-layer assembly method and spin coating method. Nano-calcium carbonate-organic composites can be obtained by both methods, and spin coating is more convenient. Calcium carbonate and carbohydrate composites were prepared by carbonation from Ca (OH) 2 and carbohydrate organic materials and their microhardness was determined. The product is calcite type calcium carbonate-organic compound material, and the kind and content of sugar have certain influence on the microhardness of the material. Under the experimental conditions, the microhardness is the highest when the sugar is amylose and the content is 4.
【學位授予單位】：華北理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB332

【參考文獻】

相關期刊論文 前1條

1 馬云海;閆久林;佟金;李萌;孫劍;;天然生物材料結構特征及仿生材料的發(fā)展趨勢[J];農(nóng)機化研究;2009年08期

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本文編號：2114471