高炉渣纤维保温板的性能优化

发布时间：2019-04-26 18:22

【摘要】：目前以酚醛树脂为粘结剂的矿物棉纤维板在使用过程中会释放出甲醛、游离酌等小分子,造成严重的环境污染,也会影响人体健康。矿物棉纤维板使用一段时间后,会吸收环境中的湿气,一方面会增加纤维板的容重,另一方面,吸收湿气后纤维板的导热系数、隔音效果以及力学性能都会降低。因此,探究新型环保粘结剂、解决纤维板吸湿性能是目前纤维板生产的又一当务之急。以熔融高炉渣为原料,经过喷吹的方法得到渣棉纤维,纤维平均直径为3.8~4.8μm,渣球平均含量0.57%~2.06%。通过添加聚乙烯醇硅溶胶粘结体系和聚乙烯醇戊二醛粘结体系制作保温板分别与酚醛树脂粘结剂体系保温板性能做对比,根据对保温板容重、吸湿率、酸碱腐蚀性检测结果对保温板粘结剂进行配比调配,最终得到性能最优的保温板。实验得出PVA-硅溶胶体系作用于1.15渣棉上容重和吸湿率最好且符合国标要求;聚乙烯醇戊二醛粘结剂体系1.20酸度渣棉所制成的纤维板容重为128.19kg/m3,与酚醛树脂保温制品容重最为接近,作用于1.15渣棉吸湿率最低;加入硅烷憎水剂后,PVA-硅烷-硅溶胶体系和PVA-GA-硅烷体系制品吸湿率分别达到0.29%和0.19%优于了工厂生产线用酚醛树脂纤维制品。用扫描电镜观察制品耐酸碱腐蚀表面形貌,用XRD分析腐蚀形成机理及腐蚀前后表面成分。得出保温板耐碱性能较强,尤其是聚乙烯醇戊二醛粘结剂体系长时间是不会受酸碱侵蚀物影响的。
[Abstract]:At present, the mineral cotton fibreboard with phenolic resin as binder will release formaldehyde, free action and other small molecules in the process of use, resulting in serious environmental pollution, and will also affect human health. Mineral cotton fibreboard will absorb moisture in the environment after a period of time, on the one hand, it will increase the bulk density of fibreboard, on the other hand, the thermal conductivity, sound insulation and mechanical properties of the fibreboard will decrease after absorbing moisture. Therefore, exploring a new environmental protection binder and solving the hygroscopic performance of fiberboard is another urgent task in the production of fiberboard. The average diameter of slag cotton fiber is 3.8 ~ 4.8 渭 m, and the average content of slag ball is 0.57% ~ 2.06%, using molten blast furnace slag as raw material. By adding polyvinyl alcohol silica sol adhesive system and polyvinyl alcohol glutaraldehyde bond system, the performance of insulation board was compared with that of phenolic resin binder system, and according to the weight and moisture absorption rate of the heat preservation plate, the thermal insulation board was prepared by adding polyvinyl alcohol silica sol bonding system and polyvinyl alcohol glutaraldehyde bond system respectively. The results of acid-alkali corrosion test were used to mix the binder of insulation plate, and finally the best thermal insulation plate was obtained. The results show that the PVA- silica sol system acts best on the bulk density and moisture absorption rate of the slag cotton and meets the requirements of the national standard. The bulk weight of fiberboard made from polyvinyl alcohol glutaraldehyde binder system 1.20 acidity slag cotton is 128.19 kg / m3, which is closest to that of phenolic resin insulation product, and the moisture absorption rate of 1.15 slag cotton is the lowest. The moisture absorption rate of PVA- silane-silica sol system and PVA-GA- silane system was 0.29% and 0.19% respectively after adding silane repellent agent, which was better than that of phenolic resin fiber products used in factory production line. The surface morphology of acid-alkali corrosion resistance of the product was observed by scanning electron microscope (SEM). The formation mechanism of corrosion and the surface composition before and after corrosion were analyzed by XRD. It is concluded that the alkali resistance of the insulation plate is stronger, especially the polyvinyl alcohol glutaraldehyde binder system will not be affected by acid-base corrosion for a long time.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X757;TQ340.1

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