高吸水性树脂研究进展

介绍了高吸水性树脂的种类,回顾了国内外高吸水性树脂的发展历程,论述了高吸水性树脂的结构及吸水机理阐,述了高吸水性树脂的制备方法及应用领域展,望了高吸水性树脂的发展方向。     

高吸水性树脂的研究进展

介绍了高吸水性树脂的分类,论述了高吸水性树脂的结构及吸水机理,阐述了高吸水性树脂的制备及应用领域,展望了高吸水性树脂的发展方向。     

高吸水性树脂的性能与应用

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。     

高吸水性树脂的生产和市场前景

简要介绍高吸水性树脂的生产工艺,主要阐述国内外高吸水性树脂的发展概况、应用领域及供需现状,分析了我国近年对高吸水性树脂的消费需求态势,展望了其广阔的市场前景。     

高吸水性聚合物的生产及市场前景

简要介绍了高吸水性树脂的生产工艺,阐述国内外高吸水性树脂的应用领域及供需现状,提出了今后我国高吸水性树脂的发展方向。     

高吸水性树脂对微肥吸持作用的研究

以淀粉接枝丙烯酸共聚工艺为基础，在共聚物主链上引入非离子基团—CONH2，确定了适宜丙烯酸／丙烯酰胺质量比。提高了高吸水性树脂耐电解质性。实验分析了微肥对树脂吸水性的影响及高吸水性树脂对各种微量元素的吸持作用。结果表明：耐电解质高吸水性树脂提高了树脂在实际使用环境中的吸水性，并对微量元素有更高的吸持作用。     

高吸水性树脂的制备工艺及应用研究进展

从高吸水性树脂的种类、制备方法及应用领域三个方面综述近年来高吸水性树脂的主要研究成果。按原材料来源分淀粉类、纤维素类、合成树脂类、有机–无机复合类四个类别重点阐述了高吸水性树脂的种类;从本体聚合、反相悬浮聚合、反相乳液聚合、辐射聚合四种方法重点分析了高吸水性树脂的制备工艺;结合高吸水性树脂的性能特点,介绍了高吸水性树脂在农林园艺、卫生医疗、建材工业及其它领域的应用;最后从工艺简单化、材料复合化及材料功能化三个方面简要分析了高吸水性树脂未来的研究思路与发展方向。     

高吸水性树脂

介绍了高吸水性树脂数十年来的发展及广阔的应用领域,对其性能、结构、吸水机理进行了论述。通过高吸水性树脂的国内外生产概况,结合目前实际状况对高吸水性对脂的发展提出了建议。作为一种功能高分子,高吸水性树脂的应用越来越广,是一种很有发展前途的新材料。     

高吸水性树脂的研究、生产与市场

全面综述了高吸水性树脂的研究、发展、生产与市场状况。并指出了高吸水性树脂研究中存在的问题、市场发展趋势、对我国高吸水性树脂的研究、发展及市场开拓具有重要意义。     

高吸水性树脂现状分析及优化升级建议

综述了高吸水性树脂在全球的发展概况,及我国生产、进出口、消费情况,并进行了预测;结合高吸水性树脂工艺技术水平与进展,提出了高吸水性树脂的优化升级建议。     

高吸水树脂的吸水机理及吸盐性的改进

介绍了高吸水树脂的结构和性能。从热力学角度阐述了高吸水树脂的吸水机理,分析了高吸水树脂吸盐性能的影响因素,总结了改进耐盐性的几种方法。简要介绍了高吸水树脂的发展和应用。     

高吸水聚合物材料在防沙治沙中的应用

介绍了高吸水聚合物的发展状况、吸水机理和性能特征，总结了合成高吸水聚合物及半合成高吸水聚合物的技术条件及若干种制备方法，并提出利用低成本植物纤维素（取自植物落叶、农作物茎杆等）、淀粉等天然原材料来制备高吸水性聚合物；探讨了以高技术、低成本、大面积可实施及效果显著为技术优势，利用高吸水聚合物进行荒漠和沙漠治理的方法和发展方向。     

Swelling behavior of butyl and chloroprene rubber composites with poly(sodium acrylate) showing high water uptake

Water-swellable rubber (WSR) comprises super absorbent polymer (SAP) embedded in a rubber matrix and has been commonly used as sealants and caulks, in which high water uptake and sufficient mechanical strength are required. In this work, we investigated the swelling behavior and mechanical properties of rubber composites comprising SAP powders. A reinforcement effect is caused by the SAP particles, which are described using a modified Guth–Gold equation up to the semi-dilute region. The complex modulus shows upper deviation at high SAP content owing to network formation between SAP particles. The swelling force of the WSR is explained by the amount of SAP particles in the surface layer of the matrix up to the semi-dilute region. The formation of the SAP network leads to an appreciable increase in the swelling force of WSR, as SAP particles embedded in the matrix also contribute to the swelling of WSR. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48535.     

SAP内养护对碱激发矿渣胶凝材料性能的影响

碱激发矿渣(AAS)胶凝材料存在早期收缩大、开裂风险高的问题,限制了其工程应用。本文采用TAM、TGA、MIP等方法研究了高吸水性树脂(SAP)内养护对AAS胶凝材料水化热、水化产物及孔结构的影响,同时研究了SAP对AAS胶凝材料抗压强度及自收缩的影响规律。结果表明,SAP的加入会增加基体的孔隙率,降低AAS浆体的抗压强度,但是随着水化时间的延长,SAP的内养护作用可以促进矿渣水化,抗压强度的降低幅度逐渐减小。SAP的加入对AAS胶凝材料的水化放热过程有一定的延迟作用,表现为诱导期延长,第二放热峰滞后。SAP的加入使AAS胶凝材料水化产物总量增加,增加程度随着模数的增加而提高。此外,SAP抑制AAS浆体自收缩效果明显,添加SAP之后自收缩降低率最高可达81%。     

基于纳米二氧化硅改性下SAP内养护混凝土的基本性能研究*

研究纳米二氧化硅(NS)改性SAP内养护混凝土的物理力学性能以及抗氯离子渗透性能，提出该混凝土的配合比设计。复掺0.08%SAP和1.5%NS能提高混凝土抗折强度；复掺0.08%SAP和1.0%NS能提高其抗压强度；复掺0.24%SAP和1.5%NS氯离子抗渗透性能最佳；复掺0.24%SAP和0.5%NS能显著减小干燥收缩率。     

高吸水性树脂的研究及其生产概述

高吸水性树脂是广泛应用的具有实用价值的功能性高分子材料。文章介绍了国内外高吸水性树脂的研究、生产概况和消费情况。并对其在我国的发展进行了预测。高吸水性树脂的研究、生产发展迅速 ,应用范围不断扩大 ,将成为继化肥、农药、地膜之后最受广大农民欢迎的农用化学品之一。     

Mechanochemical synthesis and investigations of calcium titanate powders and their acrylic dispersions

In this paper we studied calcium titanate (CaTiO₃) nanopowders obtained via a mechanochemical method assisted by microwave irradiation from calcium oxide and titanium dioxide, as well as its suspensions with addition of acrylic-poly(ethylene glycol) suspensions (SAP) obtained using microwave irradiation as a stabilizing agent. Experiments carried out using X-ray diffraction technique confirmed success of mechanochemical synthesis assisted by microwave irradiation and scanning electron microscopy images allowed to determine the structure as well as dimensions of CaTiO₃ nanopowders. Suspensions of CaTiO₃ and SAP were examined and the results showed relationships between the SAP concentration and both viscosity and stability. Both viscosity and stability are significantly increased upon addition of SAP and the dependency is nearly linear for higher SAP concentrations. Based on the results, we conclude that addition of SAP allows to successfully stabilize CaTiO₃ nanopowders and the stabilizing effect can be explained by both electrostatic and steric forces.     

Effect of superabsorbent polymer on the shrinkage and crack resistance of concrete at early age

The superabsorbent polymer (SAP) with different volumes and modes of entrained water is incorporated into concrete to study the effect of SAP on the compressive strength, flexural strength, shrinkage, plastic cracking and electrical resistivity of concrete at early age. The result indicated that the influence of SAP with different modes of entrained water on the early strength of concrete is relatively obvious. It is beneficial for the early strength of concrete to add pre-absorbed SAP whose internal curing (IC) is detracted from mixing water and unabsorbed SAP. But the early strength of concrete is decreased by adding pre-absorbed SAP. The effect of pre-absorbed SAP is limited on shrinkage of concrete when IC water is detracted from mixing water. The unabsorbed SAP gradually decreases the concrete shrinkage with its volume increase. The moderate volume of pre-absorbed SAP can decrease the early concrete shrinkage. In addition, SAP can effectively alleviate the early appearance and development of concrete cracks. Furthermore, the pre-absorbed SAP can efficiently enhance the crack resistance of concrete. When the unabsorbed SAP is added, the cracking of concrete is reduced with the increase of volume. The longer the curing age, the more obvious would be the influence of SAP on the internal humidity of concrete, which effectively delays the increase of concrete resistivity.     

保水剂研究进展

保水剂是一种具有超强吸水保水能力的高分子聚合物,能迅速吸收比自身质量大数百倍甚至上千倍的水分,吸水后的水凝胶可缓慢释放水分供作物利用。作为一种新型保水抗旱材料,近年来在农业上得到了广泛的应用,并具有广阔的发展前景。在此背景下,综述了国内外保水剂的生产发展概况、合成工艺及其材料,以及在农业方面的应用。