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Chinese Journal of Chemical Engineering 2014年第Z1期22卷 1307-1313页

作者：练成支东彦徐首红刘洪来 State Key Laboratory of Chemical Engineering East China University of Science and Technology Department of Chemistry East China University of Science and Technology School of Materials Science and Engineering East China University of Science and Technology

A molecular thermodynamic model was developed for describing the restricted swelling behavior of a thermosensitive hydrogel confined in a limited space. The Gibbs free energy includes two contributions, the contribution of mixing of polymer and solvent calculated by using the lattice model of random polymer solution, and the contribution due to the elasticity of polymer network. This model can accurately describe the swelling behavior of restricted hydrogels under uniaxial and biaxial constraints by using two model parameters. One is the interaction energy parameter between polymer network and solvent, and the other is the size parameter depending on the degree of cross-linking. The calculated results show that the swelling ratio reduces significantly and the phase transition temperature decreases slightly as the restricted degree increases, which agree well with the experimental data.

关键词： Thermo-sensitive hydrogel Restricted swelling Phase equilibrium Molecular thermodynamic model

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铕(III)三元活性配合物/丙烯酸凝胶的制备

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应用化工 2014年第5期43卷 808-812页

作者：郑炳云杨磊莆田学院环境与生物工程学院福建莆田351100

以氧化铕(Eu2O3)、邻菲罗啉(phen)和丙烯酸(AA)为原料,制备了含铕(III)三元活性配合物Eu(AA)3phen,与丙烯酸-丙烯酰胺凝胶体系进行UV共聚,制备了含铕水凝胶。研究了凝胶中Eu(AA)3phen含量对其吸水性、温敏性及荧光性能的影响,同时探讨... 详细信息

以氧化铕(Eu2O3)、邻菲罗啉(phen)和丙烯酸(AA)为原料,制备了含铕(III)三元活性配合物Eu(AA)3phen,与丙烯酸-丙烯酰胺凝胶体系进行UV共聚,制备了含铕水凝胶。研究了凝胶中Eu(AA)3phen含量对其吸水性、温敏性及荧光性能的影响,同时探讨了温度及溶胀时间对其荧光性能的影响。结果表明,随Eu(AA)3phen含量的增加,凝胶吸水率先增加后减少,荧光强度逐渐增强;对于特定的凝胶体系,其12 h溶胀度随温度增加而增加,凝胶的荧光强度随溶胀时间和温度增加而减弱。当Eu(AA)3phen的添加量为3.5%时,凝胶综合性能最佳:平衡溶胀度为631 g/g,4 h内吸水率达90%以上,荧光强度为175 a.u.。所研制的水凝胶在吸水及荧光性能方面对温度均具有良好的响应性。

关键词： UV 固化含铕水凝胶荧光行为温敏性 hydrogel containing Eu(III)

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Simplifying Molecular Complexity for the Synthesis of Polymer Materials

Simplifying Molecular Complexity for the Synthesis of Polyme...

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中国化学会2017全国高分子学术论文报告会

作者： Patrick Théato University of Hamburg Institute for Technical and Macromolecular Chemistry

The increasing complexity on the molecular level demands for highly advanced specialists possessing the skillset to synthesize such chemical structures. This clearly limits or slows down the advancement to new scientific areas. Hence, we have addressed this challenge over the years by developing simple synthetic routes, while maintaining a molecular complexity, thereby providing the synthetic tools to prepare highly functional polymer.

关键词： post-polymerization modification smart polymers hydrogel

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辐射聚合制备毛果芸香碱—水凝胶释放体系的研究

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现代应用药学 1988年第5期 29-32页

作者：赵曼云赵小朵王永常戚钜岳朱岩浙江省技术物理应用研究所浙江省测试技术研究所

本文研究的药膜是在室温条件下将含药的单体放在模具中进行辐射交联聚合。该法工艺简便,药膜纯度高不带任何引发剂残余物。我们研究了基质含水率,药物含量、辐射剂量率及总剂量对药物释放速率的影响。结果表明:药物的释放量随着基质含... 详细信息

本文研究的药膜是在室温条件下将含药的单体放在模具中进行辐射交联聚合。该法工艺简便,药膜纯度高不带任何引发剂残余物。我们研究了基质含水率,药物含量、辐射剂量率及总剂量对药物释放速率的影响。结果表明:药物的释放量随着基质含水率及药含量的增加而增加;随着交联剂用量及辐照剂量率和总剂量的增加而降低。药物在剂量率为6.46×10~3Rad/sec及总剂量为1.28×10~6ad条件下辐照与未经辐照处理的药物进行了红外及紫外对比试验,结果表明;辐照对药物结构没有明显的影响。

关键词： hydrogel pilocarpine slow release radiation-polymerization.

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各向异性全纤维素褶皱水凝胶的可视化构筑策略研究

各向异性全纤维素褶皱水凝胶的可视化构筑策略研究

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中国化学会第一届全国纤维素学术研讨会

作者：邹捷李绮华于晖叶冬冬五邑大学纺织材料与工程学院

基于生物质资源构筑褶皱水凝胶有望成为潜在应用生物材料。然而,开发一种简便策略,构筑结构可定制、力学性能优异、生物相容性好、具有高定向纳米结构和可控间隔的褶皱水凝胶对于生物相关的应用至关重要,但仍然是一个挑战。本工作利用... 详细信息

基于生物质资源构筑褶皱水凝胶有望成为潜在应用生物材料。然而,开发一种简便策略,构筑结构可定制、力学性能优异、生物相容性好、具有高定向纳米结构和可控间隔的褶皱水凝胶对于生物相关的应用至关重要,但仍然是一个挑战。本工作利用超快酸诱导的界面重构策略在碱—尿素体系中定制高取向全纤维素褶皱水凝胶。将预拉伸的碱凝胶浸泡在酸溶液中,30秒内撤去外力,渗透交联使碱凝胶产生"外强内弱"的力学失稳现象,形成褶皱结构。褶皱凝胶的间隔可通过调整预拉伸应变和酸处理时间精确调控,且该结构成功诱导细胞取向增殖。本研究为自下而上利用天然聚多糖制备生物医用水凝胶材料开辟了一条新途径,具有潜在的应用价值。

关键词： cellulose anisotropic wrinkled structure hydrogel mechanical instability

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Click Synthesis of Thermosensitive hydrogels by Catalyst-free 1,3-Dipolar Cycloaddition Reaction

Click Synthesis of Thermosensitive Hydrogels by Catalyst-fre...

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河南省化学会2016年学术年会

作者： Hongzheng Zhu Huijuan Chu Hongliang Wei Jing Zhu Gang Wang School of Chemistry and Chemical Engineering Henan University of Technology

The properties and structures of hydrogels are closely linked to the method of preparing hydrogels,therefore, it has been considered to be very important to develop new methods of preparing hydrogels.Among them, preparing hydrogels by alkyne-azide 1, 3-dipolar cycloaddition click reaction is an important method which has appeared recently. The reaction has some advantages such as simple, mild conditions, no toxic and volatile solvent, etc. However, the cytotoxicity of residual Cu catalyst brings a potential limitation of the reaction when it is used to synthesize and/or functionalize materials for biomedical applications. Herein, replacing alkyne by maleimide group, catalyst-free 1, 3-dipolar cycloaddition click reaction between azide and maleimide modified polymers was used to prepare thermosensitive hydrogels. First, three copolymers(denoted respectively as PT137, PT155, PT173) of2-hydroxyethyl methacrylate(HEMA), N-isopropyl acrylamide(NIPAM) and N, N-dimethylacrylamide(DMA) were prepared by controlling the feeding molar ratios(HEMA: NIPAM: DMA) to 1:3:7, 1:5:5,1:7:3, respectively. The polymeric dipolarophiles were prepared by introducing N-maleoyl alanine to the PT137, PT155, PT173, The polymeric dipolar was prepared by modifying the as-prepared PT137,PT155, PT173 with azidoacetic acid. Afterward, the above prepared polymeric dipolarophiles and polymeric dipolar were dissolved in water, and the thermosensitive hydrogels of different molar ratios were prepared through catalyst-free 1, 3-dipolar cycloaddition reaction. The products were characterized by GPC, FTIR, 1HNMR, SEM, TG and other instruments. The swelling behavior of the thermosensitive hydrogels was studied, and the results showed that the hydrogels had good abilities of swelling and thermosensitivily.

关键词： hydrogel 1,3-dipolar cycloaddition click reaction thermosensitivity

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Rheological study of reinforcement of konjac glucomannan hydrogels by functionalized microcrystalline cellulose

Rheological study of reinforcement of konjac glucomannan hyd...

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中国化学会第12届复杂流体流变学学术研讨会

作者： Lin Wang Yongsheng Ni Yu Du Xiaowei Xu Xiaohan Chen Xianhui Wu Jie Pang College of Food Science Fujian Agriculture and Forestry University

Natural polysaccharides have been widely used as a biomaterial.Konjac glucomannan（KGM） is a kind of high-molecular-weight neutral polysaccharide extracted from the tubers of the Amorphaphallus konjac plants.KGM exhibits good prospect in rheological study.Numerous attempts had been witnessed to improve the property of KGM hydrogel,such as physical treatment,chemical crosslinking and blending with other polymers.Recently,biocomposites based on biopolymer reinforced by different kinds of reinforcing agents have received considerable interests due to the impressive reinforcing effect and processing feasibility.Among these reinforcing agents,potential use of natural fillers in KGM composite materials showed great eco-enhancement ability.Microcrystalline cellulose（MCC） was purified and produced by the acid hydrolysis derived from purified alpha wood cellulose.MCC possesses a high cellulose content and comparatively high crystallinity.It is used as reinforcement for both synthetic and natural polymers.The influence of the addition of MCC on the structural and rheological properties of a KGM hydrogel has been studied,with the objective to design innovative material,with good mechanical properties.The functionalized MCC was characterized using scanning electron microscopy,trans-mission electron microscopy,x-ray photoelectron spectroscopy and fourier infrared spectroscopy.Oscillatory shear,amplitude sweep,frequency sweep and viscosity tests were performed in order to characterize the rheological properties of the KGM matrix,and of the KGM hydrogels filled by MCC at volume fractions below 0.5%.The results show a significant reinforcement effect due to the addition of functionalized MCC and indicate changes in the matrix network structure induced by the functionalized MCC.

关键词： Konjac glucomannan Microcrystalline cellulose hydrogel Rheological behavior~1

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高性能杂化水凝胶的制备及其性能研究（英文）

高性能杂化水凝胶的制备及其性能研究（英文）

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中国化学会2017全国高分子学术论文报告会

作者：李江波刘汉超黄光速郑静四川大学高分子科学与工程学院高分子材料工程国家重点实验室

Introducing both chemical and physical cross-links into a polymer network has emerged as a prevalent strategy to toughen hydrogels. However, most of these hybrid hydrogels are prepared on a multi-step routes with more than one polymer or cross-linker, which is sophisticated and time consuming. Here, we report on a facile fabrication by in-situ polymerizing acrylamide with a single multifunctional cross-linker. Compressive and tensile tests show the resultant hydrogels exhibit superior mechanical toughness. They can be stretched up to 1900% with a maximal fracture stress of nearly 500 kP a and be compressed to 90%. More impressively, the hydrogels can be fully recovered under compression. Rheological measurements suggest the co-existence of physical and chemical cross-links. Finally, an effective energy dissipation mechanism is observed and discussed. We conclude that the reversible physical cross-links originated from entanglement provide a mechanism of energy dissipation while the chemical cross-links ensure the structural integrity, which could be responsible for the improved mechanical properties.

关键词： hydrogel mechanical toughness multifunctional cross-linker entanglement

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高强度超拉伸聚丙烯酸超吸水水凝胶的制备

高强度超拉伸聚丙烯酸超吸水水凝胶的制备

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2014年全国高分子材料科学与工程研讨会

作者：钟鸣时富宽谢续明清华大学化学工程系先进材料教育部重点实验室

＜正＞水凝胶是指聚合物分子链在水溶液中,通过物理、化学作用交联形成一定形状的三维网络结构聚集态。由于水凝胶具有良好的吸水性、保水性、生物相容性、环境敏感性,已广泛应用于分离、生物、医疗、催化等领域。[1]传统的水凝胶交联... 详细信息

＜正＞水凝胶是指聚合物分子链在水溶液中,通过物理、化学作用交联形成一定形状的三维网络结构聚集态。由于水凝胶具有良好的吸水性、保水性、生物相容性、环境敏感性,已广泛应用于分离、生物、医疗、催化等领域。[1]传统的水凝胶交联点分布无序,且交联点之间的分子链段分布宽,导致了力学强度差等缺陷,近年来为提高水凝胶的力学强度研究者做了大量的工作。[2]同时具备优良的力学性

关键词： Nanocomposite hydrogel High mechanical strength Super absorbent

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188Re-labeled MPEG-modified superparamagnetic nanogels:preparation and targeting application in rabbits

188Re-labeled MPEG-modified superparamagnetic nanogels:prepa...

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2007年全国高分子学术论文报告会

作者： Hanwen Sun~(a,b) Lianying Zhang~a Cunlan Zhang~a Zhenlin Wei~a Side Yao~b a Dezhou University,Dezhou Shandong 253023,P R China b Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Beijing 100039

＜正＞Polyacrylamide-coated magnetic nanogels were synthesized via photochemical method in surfactants andinitiators free aqueous system at room temperature.After Hoffmann elimination of carbonyl and furthermodificati... 详细信息

关键词： Magnetic nanocomposite hydrogel methoxy poly（ethylene glycol）

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