發(fā)布時(shí)間：2018-06-08 22:36

  本文選題：海藻酸鈉 + 魔芋膠�。� 參考：《青島大學(xué)》2017年碩士論文

【摘要】：天然多糖具有良好的生物質(zhì)特性,而膜材料及多孔材料具有良好的結(jié)構(gòu)性能,將天然多糖制備成復(fù)合膜材料及復(fù)合多孔材料,可以把天然多糖的生物質(zhì)特性與膜材料、多孔材料的結(jié)構(gòu)特性相結(jié)合,從而達(dá)到提高其各項(xiàng)性能的目的,同時(shí)也提高了應(yīng)用價(jià)值。本論文選用海藻酸鈉、魔芋多糖、羧甲基纖維素三種天然多糖為原料,分別制備了天然多糖復(fù)合膜材料和多孔材料。本文首先以物理共混的方法制得海藻酸鈉/魔芋膠復(fù)合膜材料,通過(guò)紅外光譜(FT-IR)、掃描電鏡(SEM)對(duì)復(fù)合膜材料的結(jié)構(gòu)、形態(tài)進(jìn)行表征。通過(guò)比較不同配比復(fù)合膜材料的力學(xué)性能和吸濕保濕性能確定了兩者的最佳配比為3.2:0.9。此時(shí)復(fù)合膜的斷裂強(qiáng)力可達(dá)67.02MPa,吸水率和保水率分別為268.96%和112.04%,對(duì)生理鹽水及人造血漿的吸收率分別為1442.34%和576.24%。同樣以物理共混的方法制備海藻酸鈉/魔芋膠/羧甲基纖維素鈉復(fù)合膜材料,并對(duì)其結(jié)構(gòu)、形態(tài)進(jìn)行表征。通過(guò)比較不同配比復(fù)合膜材料的力學(xué)性能及吸濕保濕性能確定了三者的最佳配比為3.2:0.4:0.4,此時(shí)斷裂強(qiáng)力可達(dá)46.16MPa,吸水率和保水率分別為503.28%和356.72%,對(duì)生理鹽水及人造血漿的吸收率分別為3377.53%和2258.71%。以物理共混之后加以冷凍干燥的方法制得海藻酸鈉/魔芋膠復(fù)合多孔材料。通過(guò)紅外光譜(FT-IR)、掃描電鏡(SEM)對(duì)復(fù)合多孔材料的結(jié)構(gòu)、形態(tài)進(jìn)行了表征,結(jié)果發(fā)現(xiàn)制得的復(fù)合多孔材料孔隙率達(dá)90%以上,孔徑在100μm~200μm,單個(gè)氣孔呈圓形或扁長(zhǎng)形,整體呈蜂窩狀。通過(guò)比較不同配比復(fù)合多孔材料的力學(xué)性能和吸濕保濕性能確定了兩者的最佳配比為3.2:0.9,甘油添加量為4%。此時(shí)復(fù)合多孔材料斷裂強(qiáng)力可達(dá)0.19MPa,吸水率和保水率分別為1886.94%和662.04%。同樣以物理共混之后加以冷凍干燥的方法制備海藻酸鈉/魔芋膠/羧甲基纖維素鈉復(fù)合多孔材料,并對(duì)其結(jié)構(gòu)、形態(tài)進(jìn)行表征。結(jié)果發(fā)現(xiàn)制得的復(fù)合多孔材料空隙分布均勻且具有良好的連通性,空隙寬度在100μm~200μm,整體分布呈層狀。通過(guò)比較不同配比復(fù)合多孔材料的力學(xué)性能和吸濕保濕性能確定了三者的最佳配比為3.2:0.3:0.4,此時(shí)斷裂強(qiáng)力可達(dá)0.21MPa,吸水率和保水率分別為1621.32%和552.65%。
[Abstract]:Natural polysaccharides have good biomass properties, while membrane materials and porous materials have good structural properties. When natural polysaccharides are prepared into composite membrane materials and composite porous materials, the biomass properties of natural polysaccharides can be combined with membrane materials. The structure and properties of porous materials are combined to improve their properties and application value. In this paper, three kinds of natural polysaccharides, sodium alginate, konjac polysaccharide and carboxymethyl cellulose, were used as raw materials to prepare natural polysaccharide composite membrane materials and porous materials respectively. In this paper, sodium alginate / konjac gum composite membrane material was prepared by physical blending method. The structure and morphology of the composite membrane material were characterized by FTIR and SEM. By comparing the mechanical properties and moisture absorption and moisture retention properties of the composite membrane materials with different ratios, the optimum ratio of the two materials was determined to be 3.2: 0.9. The breaking strength of the composite membrane was 67.02 MPa, the water absorption rate and water retention rate were 268.96% and 112.04 respectively, and the absorptivity of physiological saline and artificial plasma were 1442.34% and 576.24%, respectively. The composite membrane materials of sodium alginate / konjac gum and sodium carboxymethyl cellulose were also prepared by physical blending method and their structure and morphology were characterized. By comparing the mechanical properties and moisture absorption and moisture retention properties of composite membrane materials with different ratios, the optimum ratio of these three materials is 3.22: 0.4: 0.4, the breaking strength can reach 46.16 MPA, the water absorption and retention ratio are 503.28% and 356.72%, respectively. The absorptivity was 3377.53% and 2258.71%, respectively. The composite porous materials of sodium alginate and konjac gum were prepared by physical blending and freeze-drying. The structure and morphology of the composite porous material were characterized by FT-IR and SEM. The results showed that the porosity of the composite porous material was over 90%, the pore diameter was 100 渭 m ~ 200 渭 m, and the single porosity was round or flat and long, and the whole porous material was honeycomb. By comparing the mechanical properties and moisture absorption and moisture retention properties of porous composite materials with different ratios, the optimum ratio of the two materials was found to be 3.2: 0.9, and the amount of glycerol was 4%. The breaking strength of the composite porous material is 0.19 MPA and the water absorption and water retention are 1886.94% and 662.04% respectively. The composite porous materials of sodium alginate, konjac gum and sodium carboxymethyl cellulose were prepared by physical blending and freeze-drying method, and their structure and morphology were characterized. The results show that the porosity distribution of the composite porous material is uniform and has good connectivity. The void width is 100 渭 m ~ 200 渭 m, and the whole distribution is layered. By comparing the mechanical properties and moisture absorption and moisture retention properties of composite porous materials with different ratios, it was determined that the optimum ratio was 3.2: 0.3: 0.4, and the breaking strength could reach 0.21 MPA, and the water absorption and moisture retention were 1621.32% and 552.65%, respectively.
【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB332;O629.12

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本文編號(hào)：1997476