乳凝聚

And VTMS is added in late stage of polymerization, in this situation the system has the lowest coagulum. When the hydroxyl value of such polymer increases, the coagulum decreases; and solid content of such polymer increases, the coagulum increases greatly, so it is difficult to get higher solid content emulsion.

采用正交实验方法，通过对有机硅改性丙烯酸乳液聚合过程中凝聚物含量、乳液粘度影响的研究，确定的最佳的反应条件是：以SLS/OP为乳化剂、比例为4/6、用量为2％、丙烯酸单体的用量1.5％、反应温度为75℃、改性剂VTMS用量是1.5％、改性剂后加入方式下聚合反应过程中有最低的凝聚物含量。

In this paper, three kinds of hydroxyl component are prepared for two-component waterborne polyurethane paint, that is, acrylic dispersion, acrylic emulsion and silicone-modified acrylic emulsion. The influence of the composites of these dispersion and emulsions on polymerization process, viscosity, particle size and coagulum are investigated, infrared spectroscopy , inductance coupling plasma , transmission electron microscopy and thermogravimetric analysis are used to characterized their structure, composite, morphology and thermal stability, respectively.

本论文制备了三种用于水性双组分聚氨酯涂料的含羟基组分，即丙烯酸分散体、丙烯酸乳液和有机硅改性丙烯酸乳液，研究了这些分散体和乳液在制备过程中聚合物的羟值、酸值、玻璃化温度、乳化剂、反应温度等对聚合转化率、凝聚物含量、聚合物粘度和粒径的影响，用红外光谱、热重分析、透射电镜和感应偶合等离子技术表征了其结构、组成、形态和热稳定性。

More levels of nano-SiO〓 lead to larger particle size. An increase in polymerization reaction temperature causes the decrease in coagulum and increase in viscosity and particle size, and the nano-SiO〓 has same effects at certain temperature. When the levels of hydrophilic monomer acrylic acid and hydroxylethyl methacrylate in core composite are increased, the particle size of emulsifier-free emulsion decreases, in spite of the presence of nano-SiO〓.

无皂乳液具有单分散性好、表面洁净、成本低廉、不影响产品性能的特点，首次研究了含或不含纳米粒子的含羟基和羧基的丙烯酸无皂乳液聚合，发现含或不含纳米粒子的无皂乳液聚合后的粒子粒径较大，具有单分散性；较多的纳米粒子导致较大的乳液粒径；反应温度升高，凝聚物含量下降，而乳液粘度和乳胶粒粒径增加，在相同的反应温度下，纳米粒子降低了聚合过程中的凝聚物含量，增加了乳液聚合物的粘度和粒径；不论纳米粒子是否存在，当无皂乳液核组成中亲水单体AA和HEMA用量增加时，乳胶粒粒径均减少。

When the sodium lauryl sulfate and p-octyl polyethylene glycol phenyl ether is used and its level in 3% and 6: 4 ratio, the polymerization process has the lowest coagulum and the highest monomer conversion. Higher reaction temperature and more level hydroxyl value lead to more coagulum, the latter also lead to larger particle size. The acid value has larger influence on viscosity and coagulum, there exist a best range. The emulsion particle size is larger for its hydrophilicity, most of its particles are connected together.

在含较高亲水单体的乳液聚合体系中，难以制得稳定的预乳化液，不能采用工业生产中常用的预乳化工艺，而只能采用混合单体直接滴加的方法；由于单体混合物的亲水亲油值较高，用阴离子型乳化剂十二烷基硫酸钠和非离子型乳化剂聚乙二醇辛基苯基醚混合，用量为单体总量的3％，且比例在6：4时，乳液聚合时具有最低的凝聚物含量和最高的单体转化率；乳液聚合反应温度升高，可以提高单体转化率，增加反应速度，但凝聚率相应提高；随着羟基单体含量的增加，聚合过程中凝聚率增加，聚合物乳胶粒平均直径增加；羧基单体有一个最佳的用量（2.6％），过高或过低凝聚率均提高；羧基含量对乳液的粘度有较大的影响，当羧基含量较低时，羧基含量增加，乳液粘度增加明显；含羟基乳液粒子由于含亲水基团较多，使得乳胶粒径增大，乳胶粒子大多数互相凝聚在一起，处于凝聚态。

Oleyl acetate was characterized using IR and 1H NMR. Microcapsules containing oleyl acetate were prepared through complex coacervation of whey protein and gum acacia. The coacervation process was optimized by varying experimental conditions such as pH, WP to GA ratio, wall materials concentration etc.

以高分子电解质乳清蛋白和阿拉伯胶进行复凝聚制备聚合物微胶囊，对影响复凝聚的pH、两种电解质的配比及其浓度等因素进行了考察。

This technique involved the enclosure of the emulsion in small agar capsules, double fixation using glutaralde- hyde and osmium tetroxide and embedded in resin.

在稳定性研究中，首次将电导法用于静脉乳的凝聚动力学试验取得较好的结果，测得乳剂的凝聚过程为一级动力学过程，并求得凝聚活化能和半凝聚期。

This paper studied the post-treatment process of polyvinylidene fluoride emulsion consisting of coagulation, washing-up, centrifugalization and drying procedure.

结果表明，用凝聚剂破乳、离心分离的PVDF乳液后处理工艺是可行的，凝聚效果明显，凝集粒径达到了28—32μm；离心分离完全，洗涤母液的电导率小于5μS/cm，制得的PVDF制品色泽纯白。

Under the optimum conditions, the lactobacillus bulgaricus microcapsule was madeby single agglomerate, and precipitated the wall with located in rapeseed oil with 50%ammonium sulfate solution; The preliminary micro-emulsion filtrated, then drawsome microcapsule from the micro-emulsion and progressing the second emul-sification, injecting a mixture with 3% CAP and 1.5% gelatin into the micro-emulsion,and keep the stirring speed 200r/min for 5 minutes, adjusting pH as 3.0 with aceticacid, then desiccating with the spray drier after 30 minutes. At last, got the prodtictof microcapsule powder.

通过最佳乳化条件制备的乳液，采用单凝聚法制备保加利亚乳酸杆菌微胶囊，用50％硫酸铵溶液，使菜籽油中的壁材CAP析出，形成初步的微胶囊，过滤，取上层微胶囊油液，缓慢注入3％CAP和1.5％明胶混合液中，进行第二次乳化，在200r／min的搅拌速度下乳化5min，用冰醋酸调节乳液的pH值至3.0，固化30min，取乳液置于喷雾干燥机中进行喷雾干燥。

The effects on separation of Cinnamon oil and water were studied. The results showed that the demulsifier effect was the best when NaCl 1.0mg/ml and demulsifying temperature 60 ℃ were adopted. Accumulation period was 0.11min.

研究了破乳剂用量、破乳温度对桂油-水混合物分离效果的影响，结果表明：当NaCl的加入量为1.0mg/ml，破乳温度为60℃时，破乳的效果最好，油珠凝聚时间可达到0.11min。

The effects on separation of Cinnamon oil and water were studied. The results showed that the demulsifier effect was the best when NaCl 1.0mgml and demulsifying temperature 60 ℃ were adopted. Accumulation period was 0.11min.

研究了破乳剂用量、破乳温度对桂油-水混合物分离效果的影响，结果表明：当NaCl的加入量为1.0mgml，破乳温度为60℃时，破乳的效果最好，油珠凝聚时间可达到0.11min。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。