原位调节细菌纤维素膜及其渗透汽化特性研究

研究了通过碳酸钙和羧甲基纤维素钠原位调节细菌纤维素（BC）结构的方法,使用该方法制备的细菌纤维素孔隙直径从纳米级增大至4～5 μm,且分布均匀;未加入CaCO3时在发酵过程中pH值为3.43～5.50,加入CaCO3后pH变化相对平稳,pH值为4.40～5.66;细菌纤维素产量由未添加CaCO3的3.67 g/L增加为5.21 g/L。同时考察了不同乙醇含量对调控后的BC膜渗透汽化性能和分离因子的影响。结果表明,调控后的BC膜的渗透通量从2.45 kg/（m2·h）提高到了3.50 kg/（m2·h）,分离因子略有降低。     

水杨酸凝胶剂的研制

以水杨酸为主药,羧甲基纤维素钠为基质,采用加热搅拌法制备水杨酸凝胶剂,并建立质量控制方法.实验结果表明,以羧甲基纤维素钠为基质制备的水杨酸凝胶剂工艺简单,成本低廉,性质稳定,质量可控,适合工业化生产和医院制剂.     

某选矿厂铜粗精矿提铜除杂试验研究

某选矿厂铜粗精矿中夹带大量的锌硫矿物及滑石、云母等易浮脉石矿物,在铜精选段采用石灰及硫酸锌虽然能抑制锌硫矿物,但对以滑石为主的易浮脉石矿物无抑制作用,导致精选后的铜精矿产品中脉石杂质含量大、铜品位明显偏低。针对该现状,在铜精选段进行了降低铜精矿中易浮脉石矿物的提铜除杂试验研究,在铜精选段采用CMC-Na作为易浮脉石矿物的抑制剂后,获得了铜精矿含铜品位22.34%,精选段作业回收率84.71%的选铜指标,达到了提铜降杂的目的。     

不同单一胶体对花生乳稳定性的影响

研究了黄原胶、瓜尔豆胶、CMC-Na在单因素条件下对花生乳稳定性的影响,通过花生乳室温下放置24h后静置观察、分析样品的黏度、离心沉淀率和脂肪上浮率。结果表明:3种胶体对花生乳体系均有一定的增黏作用,适宜的质量分数均能提高体系的稳定性,其中黄原胶、瓜尔豆胶、CMC-Na的适宜用量分别为≤0.02%、0.01%-0.03%、0.02%-0.04%。     

添加羧甲基纤维素钠对动态细菌纤维素生产的影响

考察添加不同浓度羧甲基纤维素钠(CMC-Na)对Acetobacter xylinum NUST4.1在摇瓶和机械搅拌发酵罐中产细菌纤维素(BC)的影响。结果发现:添加0.06% CMC-Na能有效解决发酵罐中严重结团和菌株逐级放大后生产稳定性差的2大难题,而且能显著提高纤维素产量,优化发酵罐基本工艺后能获得3.35g/L干纤维素,是基础培养的3.1倍。     

制作胡萝卜菜纸胶黏剂的选用

以胡萝卜为蔬菜样品,制成纸质产品,对所选用的食品添加剂-黏结剂进行了试验研究。试验结果表明:如果选择使用单一黏结剂,如海藻酸钠,黄原胶或CMC-Na均可使样品具有较好的成纸性。但如果使用三者的配合物,产品的成纸性以及光泽度均好于单一黏结剂的效果,三者的具体用量为海藻酸钠0.5%,黄原胶0.2%,CMC-Na0.4%。     

羧甲基纤维素钠在冰淇淋中的应用

对羧甲基纤维素纳（CMC－Na)在冰淇淋中的应用进行了研究，得出CMC－Na作为冰淇淋中的主要稳定剂，能降低成本，提高产品品质。     

成型助剂对高效氨复合吸附剂强度稳定性的影响

对CaCl2/SiO2体系高效氨复合吸附剂的成型开展研究。从提高成型吸附剂初始强度和改善成型吸附剂孔结构两方面进行实验,考察了不同助剂对吸附剂强度稳定性的影响。结果表明,在成型过程中,通过加入助剂玻璃纤维明显提高了吸附剂初始强度,当玻璃纤维添加量为CaCl2/SiO2体系质量7%时,吸附剂初始强度提高了75%,但吸附剂强度稳定性表现差。通过向粘结剂CMC-Na中引入助剂Al(NO3)3交联成型的吸附剂具有更好的孔结构,对于一定的CaCl2/SiO2体系,当Al(NO3)3与CMC-Na质量比为0.6时,吸附剂多孔性能达到最优,吸附剂强度稳定性得到明显提升,且氨吸附量提高,吸附性能稳定。     

羧甲基纤维素钠与几种胶体复配对双蛋白活性乳酸菌饮料稳定性的影响

研究了羧甲基纤维素钠(CMC-Na)分别与黄原胶、魔芋胶、瓜尔豆胶复配对双蛋白活性乳酸菌饮料稳定性的影响,结果表明,CMC-Na分别与黄原胶、魔芋胶复配时体系的稳定性较好,其中CMC-Na与黄原胶复配时,优化用量为CMC-Na0.3%、黄原胶0.1%;CMC-Na与魔芋胶复配时,优化用量为CMC-Na0.3%、魔芋胶0.15%;相较之下,优化用量的CMC-Na与魔芋胶复配时体系的稳定性最好;而CMC-Na与瓜尔豆胶复配不利于该体系的稳定.     

Microencapsulation of Radix salvia miltiorrhiza nanoparticles by spray-drying

About 133.5 nm Radix salvia miltiorrhiza nanoparticles were prepared by high speed centrifugal sheering pulverizer and the nanoparticles were characterized by TEM in this study. Microcapsules containing R. salvia miltiorrhiza nanoparticles were produced by spray-drying technique using different proportions of gelatin and sodium salt of carboxymethylcellulose (CMC-Na) as wall materials. The effects of inlet temperature, flow rate, spray-gas flow and the ratio of M_core/M_wall on encapsulation yield (EY) and encapsulation efficiency (EE) were investigated. The EE was determined by reverse high performance liquid chromatography (HPLC); the resulting microcapsules were characterized by FT-IR, SEM, and X-ray diffraction analysis. In addition, in vitro release characters of R. salvia miltiorrhiza raw powder, spray-dried powder and microcapsules were also studied. The results showed that spray-dried microcapsules had a regular spherical shape but the majority presented rough surfaces or invaginations with a diameter of 2-5 μm. R. salvia miltiorrhiza nanoparticles were embedded in the wall system consisting of gelatin and CMC-Na. Higher EE and EY were obtained under the inlet temperature of 80 °C and the ratio of M_core/M_wall of 1/4. In vitro release study showed that R. salvia miltiorrhiza microcapsules could regulate drug release. This study may be helpful to the pharmaceutical application of R. salvia miltiorrhiza.