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<h3>日期：2023-07-12 发布人：杭州菲贝 阅读量：<span id="dr_show_hits_2421">0</span><script type="text/javascript">
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<p style=";padding: 0;line-height: 16px"><strong><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">聚四氟乙烯滤膜的缺点</span></span></strong></p><p style=";padding: 0;line-height: 16px"><strong><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"> </span></strong></p><p style=";padding: 0;line-height: 16px"><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">聚四氟乙烯（英文简称</span>ptfe，中文简称铁氟龙）是当今世界耐腐蚀性能的塑料之一，被广泛应用于化工、石油、医药等许多领域。它具有耐高温（250°C）、耐低温（-100°C）、自润滑性以及不粘附任何物质的特点。聚四氟乙烯的化学性质非常稳定，在浓硫酸中煮沸或在王水中煮沸20次以上才分解；在室温下对大多数化学药品和溶剂都是稳定的。然而聚四氟乙烯的物理特性却不很稳定，如受强酸侵蚀后表面会生成一层黑膜而影响透光率；长期暴露于紫外线下会降解产生游离基而变黄；与金属接触后会发生电化反应并引起变色等等。</span></p><p style=";padding: 0;line-height: 16px"><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"> </span></p><p style="text-align:center"><img id="ae7a2d83ec5162418e7e5a4cf9038a29_img_4442" src="https://www.guolvxin.net/uploadfile/ueditor/image/20230712/1689146265221204.jpg" title="聚四氟乙烯滤膜的缺点" alt="聚四氟乙烯滤膜的缺点" width="600" height="600" border="0" vspace="0" style="width: 600px; height: 600px;"/></p><p style=";padding: 0;line-height: 16px"><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"></span><br/></p><p style=";padding: 0;line-height: 16px"><strong><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">这些缺点使得它在某些应用场合不能广泛应用：</span></span></strong></p><p style=";padding: 0;line-height: 16px"><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><br/></span><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">例如用于需要防粘污的高温环境中的密封件及泵阀内衬材料就不能选用</span>ptfe滤膜；高温条件下使用的电器绝缘材料也不能用含卤素离子的树脂制造等。</span></p><p style=";padding: 0;line-height: 16px"><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">（</span>1）</span><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">熔融指数低：熔点为</span>260度左右，热变形温度较低（205~215度）；（2）耐腐蚀性能差：易溶于盐酸、硝酸和王水等强碱溶液和有机溶剂中；（3）不耐热老化：长期使用温度一超过80摄氏度或长时间使用就会老化变质；（4）尺寸稳定性差</span><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">；</span></span><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">（</span>5）机械强度较差，（6）易燃烧；（7）化学稳定性差，（8）与某些元素会发生化学反应而产生毒性气体；（9）摩擦阻力大，（10）抗拉强度较低。（11）耐磨性较差。（12）价格较贵。</span></p><p style=";padding: 0;line-height: 16px"><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"> </span></p><p style=";padding: 0;line-height: 16px"><strong><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">在一些特殊环境中无法使用：</span></span></strong><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">（</span>1）温度过高；（2）有机物污染；（3）高压容器；（4）强氧化剂存在时（4）电磁波辐射区（5）海洋环境（6）某些离子含量高的介质</span><span style="font-family: 宋体;color: rgb(34, 34, 34);letter-spacing: 0;font-size: 16px;background: rgb(255, 255, 255)"><span style="font-family:宋体">。</span></span></p><p><br/></p> </div>
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