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style="display: none"> </div> </a> </div> <div class="page-content"> <span style="font-size:16px;">當液體中存在表面活性劑時，由于氣泡表面能吸附表面活性劑分子，當這些定向排列于氣泡表面的分子達到一定濃度時就形成一層堅固的氣泡壁薄膜。表面活性劑分子吸附在氣-液界面上形成液膜，使表面張力下降，從而增加了氣-液接觸面，這樣氣泡就不易合并?？諝馀莸拿芏缺人〉枚?，要浮到液體的表面上來，當上升的氣泡透過液面時，又把液面上的上層表面活性劑分子吸附上去。因此，暴露在空氣中的吸附表面活性劑的氣泡膜同溶液里的氣泡膜不一樣，它包有兩層表面活性劑分子，被吸附的表面活性劑對液膜具有保護作用，二層表面活性劑分子的疏水基都朝向空氣。</span><br /> <br /> <span style="font-size:16px;">消除泡沫，一般用靜止、加溫或降壓的方法，但是耗時長，而在各種生產工藝和產品使用過程中就需要迅速消除產生的泡沫，就須使用消泡劑。為此有必要了解消泡劑的作用機理。</span><br /> <span style="font-size:16px;">從理論上來講，消除使泡沫穩定的因素即可達到消泡的目的。因影響泡沫穩定性的因素主要是液膜的強度，消泡劑加入工作液后，即成為溶液、乳液或分散液，吸附于泡沫表面。由于它具有比泡沫更低的表面張力，可將表面活性劑或發泡物質吸引過來，使泡沫液膜表面粘度降低，局部變薄而破裂。所以造成泡沫破壞的主要原因是液膜的排液減薄和泡內氣體的擴散，同時為了防止再生成泡沫，要降低或者消除表面彈性，即利用脆性的表面膜代替彈性的表面膜，產生不穩定的泡沫。</span><br /> <div style="text-align:center;"> <img src="/uploads/image/20230522/20230522105028_0595.jpg" alt="成都消泡劑廠家" width="494" height="450" title="成都消泡劑廠家" align="" /> </div> <span style="font-size:16px;">下面一起來了解下消泡劑的種類和特點吧！</span><br /> <br /> <span style="font-size:16px;">對于消泡劑，我們希望同時具有消泡和抑泡的效果，在水中的溶解度要小，也不易被工作液乳化和增溶。消泡劑的品種較多，但是根據類別，一般可分為含硅和不含硅兩大類。</span><br /> <br /> <span style="font-size:16px;">1、含硅消泡劑</span><br /> <br /> <span style="font-size:16px;">含硅消泡劑表面張力低、溶解度小、分散好、作用持久，用量少，即具有強大的破泡、抑泡能力。并且此類消泡劑化學性質不活潑、無毒、對環境沒有污染。主要包括硅油、硅油乳液、硅油溶液（硅油溶于有機溶劑中）、硅油加其它填料（如SiO2，Al2O3）等四種。</span><br /> <br /> <span style="font-size:16px;">2、不含硅消泡劑</span><br /> <br /> <span style="font-size:16px;">按組分不同主要有以下幾種：</span><br /> <span style="font-size:16px;">（1）磷酸酯類消泡劑：消泡效果較好，應用較普遍。</span><br /> <span style="font-size:16px;">（2）醇、醚、脂肪酸及其酯，動植物油或礦物油以及聚乙二醇丙二醇等物質：特點是原料易得，有一定的消泡效果，少量為單獨用，大部分為復配著用。</span><br /> <span style="font-size:16px;">（3）聚醚類消泡劑：醇類和環氧乙/丙烷的加成物。通過控制醇的含碳量、環氧乙/丙烷的比例，即可控制它的消泡性能。此類消泡劑的特點是可以開發一些耐高溫的產品。由于不含硅，不會對設備器壁和織物產生沾污和油斑。有些產品不僅具有消泡、抑泡作用，對紡織行業來說還起著滲透、洗滌、緩染和勻染等功能性助劑的作用，比含硅消泡劑應用更加廣泛。</span><br /> <br /> <span style="font-size:16px;">選擇消泡劑的注意點：</span><br /> <br /> <span style="font-size:16px;">1、在起泡液中不溶或難溶</span><br /> <br /> <span style="font-size:16px;">2、表面張力低于起泡液。</span><br /> <br /> <span style="font-size:16px;">3、與起泡液有一定程度的親和性。</span><br /> <br /> <span style="font-size:16px;">4、與起泡液不發生化學反應。</span><br /> <br /> <span style="font-size:16px;">5、揮發性小，作用時間長。</span><br /> <br /> <span style="font-size:16px;">四川藍淼環?？萍加邢薰?咨詢熱線:58)是一家集生產，銷售，為一體的廠家。公司主要經銷：四川聚丙烯酰胺，成都聚合氯化鋁，成都聚合硫酸鐵，成都消泡劑等產品，歡迎新老顧客咨詢!</span><br /> </div> </div> <div class="adjacent"> <ul> <li>上一篇:<a href="/mtbd/356.html" title="干貨分享！涂料工業廢水應該選擇什么離子的四川聚丙烯酰胺？">干貨分享！涂料工業廢水應該選擇什么離子的四川聚丙烯酰胺？</a></li> <li>下一篇:<a href="/mtbd/358.html" title="在夏季使用成都聚丙烯酰胺要注意什么事項？"> 在夏季使用成都聚丙烯酰胺要注意什么事項？</a></li> </ul> </div> <div class="relevant"> <div class="title"> <a href="/xwzx/index.html" class="back">【返回列表】</a> <h3> 【推薦閱讀】↓</h3> <div class="tag"> </div> </div> <div class="content"> <ul> </ul> <div class="clearfix"> </div> </div> </div> </div> </div> <div class="clearfix"> </div> <div class="line"> </div> <div class="image-list"> <div class="wjdh-h3"> <h3> <a 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