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高吸水性树脂的性能与应用 总被引:4,自引:0,他引:4
介绍了高吸水性树脂的概况及应用 ,对高吸水性树脂的吸水原理和性能进行了论述 ,并结合目前实际状况对高吸水性树脂的今后发展提出了建议。 相似文献
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高吸水性聚合物的应用与发展 总被引:18,自引:1,他引:18
介绍了高吸水性树脂的生产概况及应用领域,对高吸水性树脂的吸水原理,性能及测定方法进行了论述,并结合目间实际状况对高吸水性对脂的发展提出了建议。 相似文献
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高吸水性树脂的研究及其发展趋势 总被引:19,自引:2,他引:17
高吸水性树脂是一种新型功能高分子材料,具有优异的性能和广泛的用途。综述了高吸水性树脂的制备及其结构和吸水机理,并介绍了高吸水性树脂的应用,讨论了高吸水性树脂的研究方向和发展前景。 相似文献
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木薯淀粉接枝丙烯酸系列高吸水性树脂的制备 总被引:3,自引:0,他引:3
以过硫酸铵为引发剂,环氧氯丙烷为交联剂,制备了木薯淀粉和丙烯酸的接枝共聚物高吸水性树脂,研究了有关聚合条件对高吸水性树脂性能的影响。结果表明,该树脂吸水性能好,并具有良好加压保水能力。 相似文献
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本文介绍用腈纶废丝碱性水解产物、聚丙烯酸铵等高吸水性树脂与聚乙烯共混制备吸水性共混物,并研究了高吸水性树脂用量、粒经、OPE用量、偶联剂的种类和用量等对共混物吸水率和力学性能的影响.结果表明,随着高吸水性树脂用量的增加,吸水率显著增大,但同时,力学性能却明显下降,当高吸水性树脂用量为3%左右时,共混物的拉伸强度和断裂伸长率达到最大;高吸水性树脂的粒径越小,共混物的性能越好;使用偶联剂能较好地改善共混物的加工性能和力学性能,但吸水率降低,耐用性提高;由于加入了适量的高吸水性树脂,共混物还具有良好的抗静电性能,其体积电阻率为10~7Ω·m. 相似文献
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以淀粉和丙烯酸为主要原料通过共聚反应制备淀粉接枝高吸水性树脂,研究了淀粉种类对高吸水性树脂性能的影响,并对高吸水性树脂进行生物降解实验.结果表明,高吸水性树脂的吸水率达到1079 g/g,60℃下8 h的保水率约为15%,在土壤中35 d后其降解率为29%. 相似文献
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研究了腐殖酸钠接枝型高吸水性树脂在土壤中的吸水和保水性能,结果表明,所合成的高吸水性树脂在土壤中具有良好的吸水性和保水性能。同时还可降低土壤容重,调节空气及热量分布,提高种子的发芽率和生长耐干旱性能。 相似文献
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The viscoelasticity of the hydrogels, the moisture sorption, and the characteristics of the sorbed water of highly water-absorptive hydroxyethylcellulose (HEC) graft copolymers [e.g., HEC graft copolymers containing partially hydrolyzed polyacrylamide (HEC-P-Hyd-PAM), etc.] were investigated in comparison with commercial absorbents. The viscosity (η) and the rigidity (G) of the dispersions of their hydrogels were, respectively, proportional to the second to the sixth powers and the fifth to the seventh powers of their concentrations (η = KC2–6 and G = K′C5–7). With respect to the characteristics of the sorbed water, the conductivity of 0.1 N KCI in the hydrogels of the HEC water, absorbents was about 11.8 mS/cm, which was almost the same as that of 0.1 N KCI in pure water, and the water absorbency of dry matter (soybean seeds) in their hydrogels was almost the same as that in pure water. These results suggest that most of the sorbed water in the HEC super water absorbents behaves like free water. The maximum volume of sorbed moisture in a monolayer fashion (Vm) of HEC-P-Hyd-PAM analyzed using the Brunauer-Emmett-Teller equation was about 0.21 g/g (1.2 mol water/polymer repeat unit), and there was no cluster water at 92% relative humidity or below as a result of applying the cluster function concept. © 1995 John Wiley & Sons, Inc. 相似文献
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Synthesis and behaviour of two copolymers of poly[acrylamide-co-(N-(hydroxymethyl)acrylamide)] in ultrafiltration experiments 总被引:1,自引:0,他引:1
Summary
Water absorbing materials on the basis of acrylamide copolymers have been investigated. The cross-linking of polymer chains
strongly effects the degree of water absorption. The influence of starting composition of polyacrylamide : sodium hydroxide,
duration of hydrolysis and irradiation conditions on cross-linking have been determined and optimized technological parameters
have been derived. Water super absorbents with the ability to absorb up to 900g water by one gram material have been prepared.
Received: 20 December 1999/Revised version: 19 June 2000/Accepted: 17 July 2000 相似文献
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涤纶工业用丝的尺寸稳定性及力学松弛 总被引:2,自引:0,他引:2
研究了涤纶工业用丝的尺寸稳定性和力学松弛行为。通过测定两种不同线密度的涤纶工业用丝的结晶度、取向度、沸水收缩率、应力松弛和蠕变行为 ,发现定长热处理过程可以提高工业用丝的尺寸稳定性 ,而松弛热处理则不然。本文还探索了热处理对涤纶超分子结构的影响 ,并用之解释热处理对尺寸稳定性影响的原因。 相似文献
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This paper reports a study on the ability of the computational fluid dynamics (CFD) modeling for analyzing the fluid flow
hydrodynamics and absorption in a packed bed column. The water absorption by silica gel absorbents in an experimental packed
bed was investigated, and the absorption performance of two different sizes of absorbent was studied. A series of experiments
were carried out for five setups which are different in the weight ratio of the employed big to small absorbents. The CFD
modeling was carried out for all five experimental setups. The predicted results show that by more replacing of the big absorbents
with the small ones the water absorption increased. On the other hand, a greater pressure drop was observed as more small
absorbents were used. The predicted absorption rates were compared with the measured values and on average a consistency within
11.6% was observed. 相似文献