魔芋葡甘聚糖及其衍生物的应用研究进展

综述了魔芋葡甘聚糖(KGM)及其衍生物在食品、医药及环保等领域的应用,表明KGM具有较高的学术研究价值及广阔的应用前景。     

魔芋葡甘聚糖及其凝胶的研究进展

从结构、改性等方面综述了魔芋葡甘聚糖及其凝胶的研究与应用。     

魔芋葡甘聚糖在生物材料领域的应用研究进展

在介绍葡甘聚糖特性的基础上评述了魔芋葡甘聚糖在固定化载体、亲和层析载体、生物膜材料、外科医用材料及药物缓释材料等生物材料领域的应用研究进展,指出了葡甘聚糖在生物材料领域应用研究中尚需解决的问题和潜在的应用前景.     

魔芋葡甘聚糖及其凝胶的研究进展

从结构、改性等方面综述了魔芋葡甘聚糖及其凝胶的研究与应用     

魔芋葡甘聚糖的改性研究进展

对魔芋葡甘聚糖的结构、性质及改性研究进行了综述,提出了存在问题并展望了其发展前景.     

乙酸酐对魔芋葡甘聚糖的改性

研究了乙酸酐对魔芋葡甘聚糖的改性,制备了魔芋葡甘聚糖醋酸酯,优化了制备工艺条件,得出了酸性催化剂条件下,乙酰化魔芋葡甘聚糖的最佳改性工艺条件为:n(乙酸酐)∶n(魔芋葡甘聚糖)=4 8∶1,反应温度50℃,反应时间4h,催化剂c(H2SO4)=0 038mol/L,取代度DS=0 662。物化性能测试表明,取代度超过0 270时,魔芋葡甘聚糖醋酸酯在水中溶解;60℃时最大溶解度为w(魔芋葡甘聚糖醋酸酯)=12%,取代度超过0 469时,魔芋葡甘聚糖醋酸酯能制成均匀的薄膜,膜厚10～30μm。     

新型絮凝剂魔芋葡甘聚糖磷酸酯的研制与应用

新型絮凝剂魔芋葡甘聚糖磷酸酯的研制与应用张昌军，杨志孝，于敏（泰山医学院泰安２７１０００）曲祥金（山东农业大学泰安２７１０１８）魔芋（ＡｍｏｒｑｈｏｈａｕｕｓＫｏｎｊａｃ）俗称鬼芋，属天南星科多年生植物块茎。经加工处理可得魔芋精粉。魔芋葡甘聚糖是魔芋...     

魔芋葡甘聚糖改性胶的研究

用氯乙酸对魔芋葡甘聚糖进行醚化改性,研究了反应温度、反应时间、氢氧化钠和氯乙酸用量对醚化反应的影响。并对改性前后其水溶胶的溶解度、黏度、稳定性、粘接强度及成膜性进行比较。     

魔芋葡甘聚糖材料疏水改性的研究进展

介绍了魔芋葡甘聚糖与高分子材料共混疏水改性的方法,评述了化学改性中魔芋葡甘聚糖脱乙酰基化、交联、接枝共聚、互穿聚合物网络、羧甲基化等疏水改性的最新研究进展,探讨了其今后的研究方向,并提出了开发热塑性KGM材料这一前沿性课题。     

魔芋葡甘聚糖基敷料的研究及其应用进展

魔芋葡甘聚糖因具有良好的生物相容性、吸水性及凝胶性而被广泛应用于医用敷料领域,且魔芋葡甘聚糖含量丰富,又可生物降解,以魔芋葡甘聚糖为基底的医用敷料的部分性能较传统类型敷料有其独特优势,同时通过物理和化学等改性,可以研究出各种性能不同的新型敷料。本文总结了魔芋葡甘聚糖的近年来的研究,和其在敷料领域的应用。最后对魔芋葡甘聚糖敷料的发展做出展望。     

Deacetylation of konjac glucomannan by mechanochemical treatment

This article presents the experimental results on deacetylation of a konjac glucomannan (KGM) powder with alkali in mechanochemical (MC) treatment by a dry vibrating mill. It is indicated that the acetyl group of the KGM powder could be removed by means of the MC method. In addition, some characteristics, such as gel rheology, particle size/conformation, water absorbency, and thermal behavior, of the deacetylated KGM are analyzed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

联苯及其衍生物的研究进展

讨论了联苯及联苯衍生物在医药、液晶、精细化工等领域的应用及合成方法。介绍了4，4’-二氯甲基联苯、4-苯基二苯甲酮、4，4’-二(9-咔唑)联苯、4，4’-二羟基联苯、4-羟基-4’-氰基联苯和异丙基联苯等联苯衍生物的制备与应用进展。     

Some viscous behaviors of styrene-acrylic emulsion thickened with konjac glucomannan

Due to the importance of viscous behavior of fluidic material in the production, storage and application, some viscous behaviors of styrene-acrylic emulsion thickened with konjac glucomannan were investigated through steady and dynamic measurements with numerical model fits. Results demonstrated that the viscosities at various konjac glucomannan colloids consistently decreased with the shear rate/angular frequency rising from 0.1 to 100 s⁻¹, behaving shear thinning phenomenon which could be fitted to the Sisko model. Temperature ramp data from 7 to 60 °C showed a temperature-induced thickening, which was slightly enhanced by konjac glucomannan. The tests for stability to time, pH value and NaCl, CaCl₂ did not show considerable effect of the konjac glucomannan.     

Morphology and mechanical properties of semi-interpenetrating polymer networks from polyurethane and benzyl konjac glucomannan

A series of semi-interpenetrating polymer network (semi-IPN) films coded as UB from castor oil-based polyurethane (PU) and benzyl konjac glucomannan (B-KGM) were prepared, and they have good or certain miscibility over entire composition range. Morphology, miscibility and properties of the UB films were investigated by using scanning electron microscopy (SEM), differential scanning calorimetry, dynamic mechanical analysis, ultraviolet spectrometer, wide-angle X-ray diffraction and tensile test. The results indicated that the UB films exhibited good miscibility when B-KGM content was lower than 15 wt%, resulting in relatively high light transmittance, breaking elongation and density. With an increase of the B-KGM content from 20 to 80 wt%, a certain degree of phase separation between PU and B-KGM occurred in the UB films. The tensile strength of the films UB increased from 7 to 45 MPa with an increase of B-KGM content from 0 to 80 wt%. By extracting the B-KGM with N, N-dimethylformamide from the semi-IPN, the morphology and phase domain size of the UB films were clearly observed by SEM. A continuous phase and dual-continuous phase model describing the semi-IPN were proposed to illustrate the morphology and its transition.     

魔芋葡甘露聚糖的研究进展

综述了国内外对于魔芋葡甘露聚糖的结构、化学改性及应用的研究，提出了存在的问题，展望了发展前景。     

丙烯腈的研究与应用进展

综述了国内外丙烯腈的生产工艺和应用进展,指出了目前存在的问题和发展趋势。     

L-苹果酸的生产及应用研究进展

综述了当前世界上L－苹果酸的生产及应用方面的进展情况,该产品因其具有优异的性能而获得广泛的应用和良好的发展前景,目前在生产技术方面还存在不足之处,需寻求更好的生产技术。     

魔芋粉接枝共聚反应的研究进展

阐述了魔芋粉接枝共聚反应规律和研究进展,总结了不同的引发剂及其浓度、单体浓度、pH值、反应温度和时间等对接枝聚合的影响。