CN109281186B - 一种用于高温膜式燃气表的硝酸滑石改性皮膜 - Google Patents
一种用于高温膜式燃气表的硝酸滑石改性皮膜 Download PDFInfo
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Abstract
本发明涉及材料技术领域，具体地说是一种用于高温膜式燃气表的硝酸滑石改性皮膜，包括PET聚酯纤维骨架布、补强丁腈橡胶，PET聚酯纤维骨架布的双面分别涂有补强丁腈橡胶，补强丁腈橡胶包括硝酸滑石、丁腈橡胶本体，硝酸滑石占补强丁腈橡胶的重量百分比为10‑13%。本发明同现有技术相比，由PET聚酯纤维骨架布双面涂有补强丁腈橡胶，经高温硫化定性而成，采用硝酸滑石补强的丁腈橡胶，可以大幅提高其与聚合物的相容性，解决在聚合物中易团聚而分散不均匀的困难，使本发明具有良好的力学性能，优异的热稳定性，在使用温度长期保持60‑70℃的情况下，不出现皱褶，脱层、砂眼、缺胶、破裂现象，其拉伸强度、扯断伸长率及屈挠性能显著提高。
Description
技术领域
本发明涉及材料技术领域，具体地说是一种用于高温膜式燃气表的硝酸滑石改性皮膜。
背景技术
膜式燃气表是我国工业用及民用燃气流量计量的重要工具，其技术水平与质量稳定性是人民生命财产安全的基础保障，是整个燃气供应产业链中必不可少的环节。从生态环境看，天然气作为一种清洁优质的能源，在我国改善能源结构以及中国石油大力推动低碳经济发展的过程中，获得了前所未有的大发展。
然而，由于地球特殊的气候特点，仅中国华南地区日平均气温≥20℃的天数在200天以上，冬季不冷，夏季高温多雨；在热带地区，如非洲北部、亚洲阿拉伯半岛和澳大利亚一些地区就是典型代表，白天太阳辐射强，地面加热迅速，气温可高达60～80℃。上升气流强，但因空气干燥，极少成云致雨，只有狂风沙尘，放置在户外的膜式燃气表，需要长期经受60～80℃的高温，并且在此过程中不出现燃气表皮膜脱层、起壳、破裂等情况，保持长期的正确计量特性，这对于目前的普通丁腈橡胶皮膜是无能为力的。
因此，需要设计一种用于高温膜式燃气表的硝酸滑石改性皮膜，以实现较高的强度和耐受高温能力，解决高温脱层、起壳、破裂的问题。
发明内容
本发明的目的是克服现有技术的不足，提供了一种用于高温膜式燃气表的硝酸滑石改性皮膜，以实现较高的强度和耐受高温能力，解决高温脱层、起壳、破裂的问题。
为了达到上述目的，本发明是一种用于高温膜式燃气表的硝酸滑石改性皮膜，包括PET聚酯纤维骨架布、补强丁腈橡胶，其特征在于：PET聚酯纤维骨架布的双面分别涂有补强丁腈橡胶，补强丁腈橡胶包括硝酸滑石、丁腈橡胶本体，硝酸滑石占补强丁腈橡胶的重量百分比为10-13%。
所述的硝酸滑石包括滑石粉、浓硝酸，滑石粉与浓硝酸的摩尔比为1：3。
所述的滑石粉为Mg3[Si4O10](OH)2。
所述的硝酸滑石按如下步骤制备：步骤1，采用粉末漏斗将滑石粉逐量加到浓硝酸中，形成溶液，步骤2，对溶液进行剧烈搅拌后，向溶液内添加质量百分比为30%的去离子水，并保持溶液PH值在3-5，温度为55±2℃的条件下，进行动态晶化3h，再进行静态晶化24h，步骤3，对晶化后的产物依次进行过滤、洗涤至滤液PH值为6-7、抽干成滤饼、真空干燥、500℃中温焙烧后，形成硝酸滑石。
所述的补强丁腈橡胶涂覆在PET聚酯纤维骨架布的双面后，放入模具，在150℃的温度和3.0MPa的压力下，通过12分钟的高温硫化定性，形成成品。
本发明同现有技术相比，由PET聚酯纤维骨架布双面涂有补强丁腈橡胶，经高温硫化定性而成，采用硝酸滑石补强的丁腈橡胶，可以大幅提高其与聚合物的相容性，解决在聚合物中易团聚而分散不均匀的困难，使本发明具有良好的力学性能，优异的热稳定性，在使用温度长期保持60-70℃的情况下，不出现皱褶，脱层、砂眼、缺胶、破裂现象，其拉伸强度、扯断伸长率及屈挠性能显著提高，在60-70℃的环境下，采用本发明的膜式燃气表的使用寿命提高1-2倍，增强了膜式燃气表的市场竞争力，满足了用户需求。
具体实施方式
现对本发明做进一步描述。
本发明是一种用于高温膜式燃气表的硝酸滑石改性皮膜，包括PET聚酯纤维骨架布、补强丁腈橡胶，PET聚酯纤维骨架布的双面分别涂有补强丁腈橡胶，补强丁腈橡胶包括硝酸滑石、丁腈橡胶本体，硝酸滑石占补强丁腈橡胶的重量百分比为10-13%。硝酸滑石包括滑石粉、浓硝酸，滑石粉为Mg3[Si4O10](OH)2，滑石粉与浓硝酸的摩尔比为1：3。
步骤1，采用粉末漏斗将滑石粉逐量加到浓硝酸中，形成溶液，步骤2，对溶液进行剧烈搅拌后，向溶液内添加质量百分比为30%的去离子水，并保持溶液PH值在3-5，温度为55±2℃的条件下，进行动态晶化3h，再进行静态晶化24h，对晶化后的产物依次进行过滤、洗涤至滤液PH值为6-7、抽干成滤饼、真空干燥、500℃中温焙烧后，形成硝酸滑石。硝酸滑石作为补强剂，占补强丁腈橡胶的重量百分比为10%，形成复合橡胶材料。补强丁腈橡胶涂覆在PET聚酯纤维骨架布的双面后，放入模具，在150℃的温度和3.0MPa的压力下，通过12分钟的高温硫化定性，而使线性的橡胶大分子通过交联而形成体型大分子，最终达到改性皮膜的要求，形成成品高温改性皮膜。
实施例2，采用粉末漏斗将滑石粉逐量加到浓硝酸中，形成溶液，对溶液进行剧烈搅拌后，向溶液内添加质量百分比为30%的去离子水，并保持溶液PH值在3-5，温度为55±2℃的条件下，进行动态晶化3h，再进行静态晶化24h，对晶化后的产物依次进行过滤、洗涤至滤液PH值为6-7、抽干成滤饼、真空干燥、500℃中温焙烧后，形成硝酸滑石。硝酸滑石作为补强剂，占补强丁腈橡胶的重量百分比为11%，形成复合橡胶材料。补强丁腈橡胶涂覆在PET聚酯纤维骨架布的双面后，放入模具，在150℃的温度和3.0MPa的压力下，通过12分钟的高温硫化定性，而使线性的橡胶大分子通过交联而形成体型大分子，最终达到改性皮膜的要求，形成成品高温改性皮膜。
实施例3 ，采用粉末漏斗将滑石粉逐量加到浓硝酸中，形成溶液，对溶液进行剧烈搅拌后，向溶液内添加质量百分比为30%的去离子水，并保持溶液PH值在3-5，温度为55±2℃的条件下，进行动态晶化3h，再进行静态晶化24h，对晶化后的产物依次进行过滤、洗涤至滤液PH值为6-7、抽干成滤饼、真空干燥、500℃中温焙烧后，形成硝酸滑石。硝酸滑石作为补强剂，占补强丁腈橡胶的重量百分比为12%，形成复合橡胶材料。补强丁腈橡胶涂覆在PET聚酯纤维骨架布的双面后，放入模具，在150℃的温度和3.0MPa的压力下，通过12分钟的高温硫化定性，而使线性的橡胶大分子通过交联而形成体型大分子，最终达到改性皮膜的要求，形成成品高温改性皮膜。
实施例4，采用粉末漏斗将滑石粉逐量加到浓硝酸中，形成溶液，对溶液进行剧烈搅拌后，向溶液内添加质量百分比为30%的去离子水，并保持溶液PH值在3-5，温度为55±2℃的条件下，进行动态晶化3h，再进行静态晶化24h，对晶化后的产物依次进行过滤、洗涤至滤液PH值为6-7、抽干成滤饼、真空干燥、500℃中温焙烧后，形成硝酸滑石。硝酸滑石作为补强剂，占补强丁腈橡胶的重量百分比为13%，形成复合橡胶材料。补强丁腈橡胶涂覆在PET聚酯纤维骨架布的双面后，放入模具，在150℃的温度和3.0MPa的压力下，通过12分钟的高温硫化定性，而使线性的橡胶大分子通过交联而形成体型大分子，最终达到改性皮膜的要求，形成成品高温改性皮膜。
按上述规范制成的皮膜经检测60-70℃具有下列特征：
| 硝酸滑石 | 拉伸强度 | 拉断伸长率 | 邵氏硬度 | 回弹性 | 屈挠龟裂 | |
| 实施例1 | 10% | 16.7MPa | 483.5% | 57.6 | 55.2% | 30235 |
| 实施例2 | 11% | 17.3MPa | 488.7% | 58.3 | 56.8% | 30743 |
| 实施例3 | 12% | 18.5MPa | 487.4% | 58.6 | 58.4% | 31078 |
| 实施例4 | 13% | 18.9MPa | 491.2% | 59.1 | 58.6% | 31691 |
Claims (3)
1.一种硝酸滑石用于高温膜式燃气表的皮膜的用途，所述皮膜包括PET聚酯纤维骨架布、补强丁腈橡胶，其特征在于，所述PET聚酯纤维骨架布的双面分别涂有所述补强丁腈橡胶，所述补强丁腈橡胶包括硝酸滑石、丁腈橡胶本体，所述硝酸滑石占所述补强丁腈橡胶的重量百分比为10-13％，
其中，所述硝酸滑石按如下步骤制备得到：
步骤1，采用粉末漏斗将滑石粉逐量加到浓硝酸中，形成溶液，
步骤2，对溶液进行剧烈搅拌后，向溶液内添加质量百分比为30％的去离子水，并保持溶液pH值在3-5，温度为55±2℃的条件下，进行动态晶化3h，再进行静态晶化24h，
步骤3，对晶化后的产物依次进行过滤、洗涤至滤液pH值为6-7、抽干成滤饼、真空干燥、500℃中温焙烧后，形成所述硝酸滑石。
2.根据权利要求1所述的硝酸滑石用于高温膜式燃气表的皮膜的用途，其特征在于，所述滑石粉与所述浓硝酸的摩尔比为1：3。
3.根据权利要求1所述的硝酸滑石用于高温膜式燃气表的皮膜的用途，其特征在于，所述补强丁腈橡胶涂覆在所述PET聚酯纤维骨架布的双面后，放入模具，在150℃的温度和3.0MPa的压力下，通过12分钟的高温硫化定型，形成成品。
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