水凝胶

The composite absorption gel for profile control and water blocking used in oilfields now has poor flexibility and injectivity, which cannot realize deep profile control.

针对目前用于油田调剖堵水的复合吸水凝胶吸水后柔韧性和注入能力差，不能有效进行深部调剖的现状，提出了改善吸水凝胶吸水性和注入性的方法，并制得柔性复合吸水凝胶PAG。

The influences of N,N'-methene biacrylamide cross-linker,monomer concentration,polymerization time and temperature on swelling ratio were investigated,and reversibility of the hydrogels under various pH conditions at given temperature.

目的通过合成聚丙烯酸-co-α-甲基丙烯酸水凝胶，研究N，N'-亚甲基双丙烯酰胺交联剂、丙烯酸和α-甲基丙烯酸单体浓度、聚合时间对其水凝胶溶胀率的影响，以及温度和不同pH值时水凝胶的pH可逆性。

In this review, the research progress in polymeric hydrogels based on poly-HEMA, organic silicane, molecularly imprinted polymer and ion ligand-containing polymer for sustained ophthalmic drug release and soft contact lens is reviewed, and their advantages/drawbacks are critically analyzed.

综述了基于角膜接触镜、适于缓释眼用药物的poly-HEMA水凝胶、硅氧烷水凝胶、分子印迹聚合物水凝胶以及含离子配体水凝胶的研究进展，并展望了适于角膜接触镜缓释的眼用制剂的水凝胶材料的发展前景。

Results 86 cases of polyacrylamide hydrogel were injectable implant in the treatment of non-organic change. 32 cases only because of psychological pressure,and urgent requirement for seeking out hydrogel,Were treated using suction liposuction methods.Induration significantly complicated and tough for using semi Central areolar incision under half,pumping out water gel thoroughly Abstract induration.Hydrogel into pectoralis major,who may armpit transverse incision after augmentation.

结果：86例聚丙烯酰胺水凝胶注射式隆乳术后的就诊者中，对无明显器质性改变，仅因心理压力过大而迫切要求取出水凝胶的32例求术者，采用脂肪抽吸式方法抽吸；对于并发硬结明显大而硬者，采用乳晕下1/2半环切开，抽吸水凝胶彻底摘出硬结；水凝胶注入胸大肌内、后间隙者可采用腋下横切口，分离胸大肌将乳腺后间隙水凝胶向胸大肌下间隙挤出抽吸到清亮液体后，同期放入假体于胸大肌后间隙。

There were crystallizable water and non-crystallizable water in polyacrylate hydrogel; the content of the non-crystallizable water was 2.13 g/g dry resin, much higher than that in non-ionic hydrogels.

聚丙烯酸钠水凝胶中的水有相变水和非冻结水两种存在形式，其中非冻结水含量为2.13g水/g绝干树脂，该数值大大高于非离子型水凝胶。

The research of swelling dynamic behavior shows that the electrolytical ions in swelling media have a great effect on the swelling behavior of PVA gel and the equilibrium swelling ratio in physiological saline is less than that in aqueous media.

溶胀特性研究显示，PVA水凝胶在生理盆水中的平衡溶胀比小于其在蒸馏水中的平衡溶胀比，凝胶的平衡溶胀比随浓度和冷冻－解冻次数的增加而下降，其下降趋势满足幂函数的变化规律；水凝胶的溶胀过程符合溶胀动力学方程。

Optimized the preparation of chitosan hydrogel technological conditions, and the result indicated that: the hydrogel with best quality can be gotten, with the chitosan quantity 1 g, the formaldehydevolume 0.2 mL, the gelatination temperature 50℃.

通过试验优化制备壳聚糖水凝胶的工艺条件，试验结果表明：当壳聚糖量为1 g，甲醛体积为0.2 mL，凝胶化温度为50℃时，制备得到的水凝胶质量优良。

An in situ injectable thermosensitive hydrogel constitutes of CS, HTCC withα,β-glycerophosphate was synthesized.

以CS及HTCC配合α，β-甘油磷酸制备原位可注射物理交联温敏水凝胶(CS/HTCC-GP水凝胶)。其溶胶-凝胶的转变时间可被控制在25°C以上。

Compared with G1 synthesized from 1,2,4,5-benzene tetracarboxylic acid and 4hydroxy pyridine at molar ratio of 1:2,G2 gelled water at higher minimum gelator concentration and gave the gel with lower gel-to-sol dissociation temperature at the same concentration.

相对于在摩尔比1：2条件下，由均苯四甲酸和对羟基吡啶合成的凝胶因子G1，在相同浓度下，G2在更高的最低凝胶因子浓度使水凝胶，并且得到的凝胶具有更低的凝胶-溶胶破坏温度。

PAA/PVA IPN hydrogels were prepared by a sequential method by which acrylic acid firstly. polymerizes and cross-links in PVA/water solution with UV irradiation,then PVA physical cross-linked hydrogels are formed in cross-linked PAA networksby freezing-thawing. The orthogonal test design method was used to optimize theexperimental conditions based on the mechanical and swelling properties of thehydrogels. The effect of the PAA and crosslinking agent contents on the microscopicmorphology of the PAA/PVA IPN xerogel was investigated by transmission electronmicroscopy, and on the mechanical properties of the hydogels was studied bymeasurements of mechanical properties.

针对水凝胶强度、生物相容性和刺激响应性的需要，选择了以PVA和PAA为复合水凝胶的基本分子结构；采用顺序IPN方法制备PAA／PVA IPN水凝胶，即将单体丙烯酸与PVA溶液共混，AA经紫外光辐射聚合交联在PVA溶液中形成PAA化学交联网络，再经冰冻—解冻循环过程在PAA网络内形成PVA物理交联网络。

I am sure after a few weeks of adaptation and familiarization I will have no difficulty in functioning on a daily basis in an English speaking society or in participating fully in graduate studies.

在大学的三年的学习生活不仅给予我自身的充实，更重要的是磨练和培养了我较强的自觉能力和严谨，踏实的作风以及不怕困难的精神，对未来充满了信心！

As the first volcanoes erupted, one of the gases that bellowed out was steam.

在第一批火山喷发时，喷出的气体之一就是水蒸汽。