共查询到17条相似文献,搜索用时 125 毫秒
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淀粉及其衍生物的疏水化改性研究进展 总被引:2,自引:0,他引:2
淀粉及其衍生物通过引入不同的疏水性基团进行疏水化改性,改进了淀粉产品的应用性能,使之具有许多新的独特性能,更好的适应了特定的应用要求。综述了迄今原淀粉和羧甲基淀粉、羟乙基淀粉、阳离子淀粉以及两性淀粉几种不同的水溶性淀粉的疏水化改性方法,以及疏水基团的引入对产品主要性能的影响。介绍了疏水化改性淀粉衍生物在造纸、污水处理、土壤改良、涂料塑料工业等领域的应用和发展前景。 相似文献
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涂料用氧化玉米淀粉胶液的制备 总被引:3,自引:1,他引:2
论述了涂料用氧化玉米淀粉胶液制备的原理和优化工艺条件,确定了氧化玉米淀粉胶液的颜色和粘度为满足内墙涂料生产的检验标准。配制的内墙涂料与106涂料相当,但成本低。 相似文献
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马铃薯多孔淀粉的制备及其在调湿涂料中的应用 总被引:1,自引:0,他引:1
制备了马铃薯多孔淀粉,对其进行了SEM表征,考察了pH、α-淀粉酶用量对多孔淀粉吸油率/得率的影响,发现该多孔淀粉具有特殊的中空结构,孔道直径约为7~8μm,孔容积占颗粒体积的50%左右,具有良好的吸附性能。以多孔淀粉为填料、苯丙乳液为成膜物制备了多孔淀粉复合调湿涂料。测定了其涂料基本性能、吸水能力及调湿能力。结果表明:该多孔淀粉复合调湿涂料符合内墙涂料的基本要求,且涂层内部富含孔道和空隙,其吸水率可达150%,具有较强的吸水性和吸放湿性能,可用于内墙调湿涂料。 相似文献
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木薯淀粉在建筑涂料中的应用 总被引:8,自引:0,他引:8
本介绍了用双氧水作氧化剂,在碱性条件下对木薯淀粉进行氧化,制备淀粉胶的原理、方法和性能指标。并对影响该淀粉胶的各种因素进行了讨论。本还介绍了内墙淀粉涂料的配方、工艺及其性能与特点。 相似文献
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淀粉类胶粘剂的应用研究进展 总被引:7,自引:5,他引:2
综述了淀粉胶粘剂在胶合板工业、标签胶、瓦楞纸箱、建筑涂料和卷烟工业等领域中的应用研究进展。淀粉是一种可再生的天然高分子化合物,具有良好的粘接性能和成膜性能。淀粉胶粘剂具有环境友好、价格低廉和性能优良等特点,是一种发展潜力极大的胶粘剂。 相似文献
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歧化松香木薯淀粉酯的微波合成及表征 总被引:2,自引:0,他引:2
在微波辐照下,以吡啶为溶剂和催化剂,经歧化松香酰氯和木薯淀粉的O-酰化反应合成得到歧化松香木薯淀粉酯。探讨了各种因素对产物取代度的影响,用元素分析、FT-IR、SEM、TG-DTA和XRD对目标产物进行了分析和表征,并测试了目标产物的溶解性能、防水性能。结果表明,最佳合成条件为淀粉活化时间1.5 h,反应温度100℃,反应时间2.5 h,吡啶用量25 mL,歧化松香酰氯与淀粉葡萄糖单元羟基的摩尔比3∶1,微波功率800 W。淀粉经歧化松香酯化改性后,结晶度降低,热稳定性提高,溶解性得到改善,并具有良好的疏水性,有望在防水涂料和塑料中得到应用。 相似文献
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Starch‐coated polyethylene (PE) films were prepared by immersing PE in a hot, jet cooked solution of starch. They were allowed to react with acrylonitrile (AN) in the presence of ceric ammonium nitrate initiator, and the graft polymerization that occurred produced starch‐g‐polyacrylonitrile (PAN) coatings that contained about 25 wt % grafted PAN. The starch‐g‐PAN coatings tightly adhered to the PE film surfaces. When grafted starch coatings were wetted with water and the surfaces vigorously rubbed, less than 20% of the coating was removed. The fact that PAN‐grafted coatings were not removed with boiling water provided further evidence for their strong adherence. When starch was removed from the coating by acid hydrolysis, the residual grafted PAN still remained adsorbed on the PE surface. Because the grafted coating was completely removed by treatment with refluxing 0.7N sodium hydroxide, there is apparently no chemical bonding between starch‐g‐PAN and PE. The dimensional changes associated with the evaporation of water from these PAN‐grafted coatings caused the films to curl during drying. Because the final shape of these coated films depends upon the presence or absence of water in the surrounding environment, these films may be considered to be a type of stimulus‐responsive polymer. Attempts to graft polymerize methyl methacrylate and methyl acrylate onto starch‐coated PE surfaces, under conditions similar to those used with AN, were unsuccessful. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3323–3328, 2003 相似文献