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交联玉米淀粉微球合成及其吸附性能研究 总被引:1,自引:0,他引:1
以N,N′–亚甲基双丙烯酰胺为交联剂,用反相悬浮法合成交联玉米淀粉微球(CSMs),运用红外、X射线衍射仪、电镜、粒度分析仪对产物进行表征分析,测定淀粉及淀粉微球吸附阴离子表面活性剂(SDS)后pH值与Zeta电位,研究两者吸附性差异。实验表明,合成淀粉微球大小均一、结构致密、表面粗糙、孔隙发育良好,粒径在30μm以下微球占83%;与淀粉相比,随交联度增加,淀粉微球溶解度、溶胀度下降,吸水量增加,淀粉微球与阴离子表面活性剂间存在比淀粉更强吸附作用,可作为一种良好吸附剂。 相似文献
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以可溶性淀粉为原料,环氧氯丙烷为交联剂,Span60为乳化剂,大豆色拉油为油相,采用逆相悬浮交联聚合法合成淀粉微球。通过正交试验探讨了合成较小粒径淀粉微球的条件。结果表明,淀粉乳浓度对淀粉微球粒径影响最大,较小粒径淀粉微球合成的最佳条件为:淀粉乳浓度12%,水相用量5mL,乳化剂用量0,6g,交联剂用量3mL。并在最佳条件下利用超声波配合乳化,以得到粒径更小更均匀的淀粉微球。 相似文献
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以可溶性淀粉为原料,环氧氯丙烷为交联剂,Span60为乳化剂,大豆色拉油为油相,采用逆相悬浮交联聚合法合成淀粉微球。通过正交试验探讨了合成较小粒径淀粉微球的条件。结果表明,淀粉乳浓度对淀粉微球粒径影响最大,较小粒径淀粉微球合成的最佳条件为:淀粉乳浓度12%,水相用量5mL,乳化剂用量0,6g,交联剂用量3mL。并在最佳条件下利用超声波配合乳化,以得到粒径更小更均匀的淀粉微球。 相似文献
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以可溶性淀粉为原料,环氧氯丙烷为交联剂,Span60为乳化剂,环己烷和三氯甲烷为油相,采用逆相悬浮交联聚合法合成淀粉微球.通过单因素及正交实验探讨了各因素对淀粉微球平均粒径的影响.结果表明,水相用量对淀粉微球粒径影响最大,较小淀粉微球合成的最佳条件为:淀粉乳浓度10%,水相用量4mL,乳化剂用量0.5g,交联剂用量3mL.通过电镜照片表征了淀粉微球的微观结构. 相似文献
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构建一种慢消化淀粉和抗性淀粉含量较高,且具有一定谷物品质特征的淀粉微球,即能量缓释拟谷物淀粉微球。探究不同添加量的海藻酸钠、结冷胶、壳聚糖与马铃薯淀粉,对所构建微球中慢消化淀粉含量的影响,并在此基础上,做响应面优化。结果表明,海藻酸钠浓度0.051 mol/L、结冷胶浓度0.047 mol/L及壳聚糖浓度0.014 mol/L时,制备的微球慢消化淀粉含量57.88%,而抗性淀粉含量较低。用月桂酸改性的马铃薯淀粉制备的微球,在具有高水平慢消化淀粉的同时,抗性淀粉含量大幅提高至31.49%。两种淀粉微球具有良好的吸水性和膨胀性,而微球的汤液pH值较低,汤液干物质量和碘蓝值也明显低于大米和小米。此外,微球具有与小米相似的质构特性,可作为拟谷物食品食用。 相似文献
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以可溶性淀粉为原料,反相乳液聚合法合成可降解淀粉微球,并测定了它的粒度分布、红外光谱、降解性、载药性等.结果表明:可降解淀粉微球的平均粒径为15.423μm,94%分布在1~50 μm,8 h后被淀粉酶降解11.72%~24.58%,淀粉微球具有很好的可降解性. 相似文献
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以玉米淀粉为主要原料,Span-60和Tween-80为乳化剂,以N,N-亚甲基双丙烯酰胺(MSDS)为交联剂,采用反相乳液法制备淀粉微球(CSM)。试验探讨交联剂用量和油水相体积比对淀粉微球平均粒径的影响;对比了淀粉和淀粉微球对金属铜离子的吸附性差异。结果表明:交联剂的用量和水油相体积比是影响微球粒径的主要因素;当交联剂用量为0.4 g,油水相体积比为5∶1时,被交联淀粉的吸附性最强;与淀粉相比,淀粉微球比淀粉对金属阳离子有更强的吸附作用,可作为一种良好吸附剂。XRD结果表明了所得淀粉微球的漫散衍射峰居多,FT-IR结果表明了淀粉与交联剂发生了明显的交联,SEM结果表明了所得淀粉微球结构致密、表面粗糙多孔。 相似文献
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The molecular structure of corn starches different in amylose content (waxy, normal, and high‐amylose) was analyzed in 90% dimethyl sulfoxide (DMSO) solution by refractive index (RI) and multi‐angle laser light scattering (MALLS) detectors. The starch sample solutions were measured either by medium‐pressure size exclusion chromatography (MPSEC) or by the micro‐batch mode. For waxy corn starch, the average molar mass (Mw) and radius of gyration (Rg) values were similar in both methods. However, for normal and high‐amylose corn starches, Mw measured by the micro‐batch mode was 2–4 times greater than that by the chromatographic method, although Rg values obtained from both methods were not very different. The Mw difference was the greater the higher the amylose content of starch. 相似文献
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Yun Liu Houda Sabboh Gunnar Kirchhof Peter Sopade 《International Journal of Food Science & Technology》2010,45(9):1925-1931
Twenty samples of sweet potato from Papua New Guinea, made up of cultivars 3‐mun, Carot kaukau, Wahgi besta, Nillgai, Baiyer kaukau, and 1‐mun from three provinces, three farmers, and three locations, were subjected to an in vitro starch digestion procedure. Digestion of starch was studied by glucometry, while potassium release was monitored using electrochemistry. The potassium content of the nondigested samples ranged from 4 to 17 mg g?1 dry solids, while the starch content was from 47 to 80 g per 100 g dry solids and independent of G × E effects. In vitro starch digestibility (2–75 g digested starch per 100 g dry starch) significantly (P < 0.05) varied with time in a nonlinear manner with biphasic digestograms. Potassium release was independent of time in in vitro gastric and pancreatic regions, but more potassium was released during pancreatic than gastric digestion. Results suggest differences in resistant starch and bioavailability of (micro)nutrients that could influence utilisation of sweet potato. 相似文献
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为拓展静电纺纳米纤维的应用领域,拓宽静电纺丝工艺的材料来源,对国内外近期静电纺动物蛋白纳米纤维的研究进展进行了综述。针对目前静电纺丝工艺中有机溶剂使蛋白质变性的问题,介绍了几种取代有机溶剂的方法,并对这些方法的优缺点进行对比,分析认为水溶性聚合物代替有机溶剂的方法更有利于蛋白纳米纤维在生物医药领域应用;讨论了交联改性及共混改性对静电纺动物蛋白纳米纤维力学性能的影响,对静电纺胶原蛋白纳米纤维在生物医药领域的应用进行了总结;最后针对利用静电纺丝技术制备动物蛋白纳米纤维亟待解决的问题以及未来的发展方向进行了展望。 相似文献
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Lignin, the second most abundant bio-renewable polymer in the world after cellulose, is widely used in industrial production. In recent years, nanoparticles have attracted increasing attention due to their excellent properties. Therefore, the preparation of lignin nanoparticles to obtain value-added products is an effective way to utilize their potential completely. This article describes the preparation methods of micro/nanosized lignin with different sizes and shapes, and provides a detailed introduction to their applications in biomedicine. 相似文献