CN115304824A - 一种木棉纤维基真空绝热板及其制备方法与应用 - Google Patents
一种木棉纤维基真空绝热板及其制备方法与应用 Download PDFInfo
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Abstract
本发明公布了一种干法制备木棉纤维基真空绝热板的方法,芯材主要成份包括1~100份木棉纤维、0~50份气相二氧化硅、0~40份隔热填料、0~10份遮光剂。具体制备步骤如下:先将木棉纤维及隔热填料利用粉碎机粉碎,然后将所用原料进行烘干,并将干燥后的原料按照一定比例混合均匀,放入模具中进行铺装,并通过压机压制成型,即得真空绝热板芯材,最后将成型芯材放入高阻气膜袋中,进行真空封装,得到超低密度真空绝热板。本发明工艺流程简单,制得的芯材密度低,性质稳定、导热系数低,减碳效果明显,可作为气相二氧化硅芯材的潜在替代品。
Description
技术领域
本发明涉及真空绝热板领域,具体涉及一种干法制备木棉纤维基真空绝热板的方法。
背景技术
随着国民经济的快速发展和人民生活水平的提高以及对美好生活的追求,人们对居住空间舒适度的要求也越来越高,随之而来的就是制冷供暖能耗的大幅度提升。近年来由于建筑能耗占社会总能耗的比重越来越大,人们对建筑保温的关注度也越来越高。目前应用最多的真空绝热板芯材主要有生产成本较高的气相二氧化硅,对真空度要求高、易回弹的玻璃纤维等,这些芯材的生产都需要消耗大量的能源资源。因此,寻找一种合适的低成本、低生产能耗的替代材料,在真空绝热板领域具有深远影响。
发明内容
本发明在于提供一种干法制备木棉纤维基真空绝热板的方法,本发明提供的干法制备木棉纤维基真空绝热板能够增加木棉纤维的高值化利用途径,将回收纤维变废为宝,同时工艺流程简单,制得的真空绝热板密度低,性质稳定、成本低,具有优异的隔热性能。
一种木棉纤维基真空绝热板,按重量份数主要包括:1~100份木棉纤维、0 ~50份气相二氧化硅、0~40份隔热填料、0~10份遮光剂,其中气相二氧化硅、隔热填料和遮光剂的用量不为0;所述真空绝热板的密度为80~140kg/cm3,导热系数为4~10mW/(m·K)。
优选的,所述木棉纤维基真空绝热板,按重量份数主要包括:40~80份木棉纤维、10~50份气相二氧化硅、5~30份隔热填料、5~10份遮光剂
所述木棉纤维长度为0.5~5.0mm;所述隔热填料为回收纤维,具体包括聚酯纤维、玻璃纤维、植物纤维等二次纤维中的至少一种。
所述聚酯纤维长度为0.5~12.0mm,平均直径为10~30μm;所述玻璃纤维平均长度为0.8~2.0mm,平均直径为12~38μm;所述植物纤维平均长度0.5~3 mm,平均直径为10~30μm。
本发明提供的一种干法制备上述木棉纤维基真空绝热板的方法,包括以下步骤:
(1)粉碎:将木棉纤维及隔热填料利用粉碎机粉碎;
(2)烘干:将所用原料及高阻气膜袋烘干;
(3)配料:将干燥后的原料按照比例混合均匀;
(4)铺装成型:将混合好的配料放入模具中进行铺装,并通过压机压制成型,即得真空绝热板芯材;
(5)封装:将成型芯材放入高阻气膜袋中,进行真空封装,最后得到木棉纤维基真空绝热板。
步骤(1)中,所述原料为木棉纤维、气相二氧化硅、隔热填料和遮光剂;
优选的,步骤(2)中,所述烘干方式为微波干燥、真空干燥或鼓风干燥中的一种,烘干温度为100~180℃,烘干至含水率≦5.0%。
优选的,步骤(2)中,所述高阻气膜袋的烘干温度为40~70℃,烘干时间为30~180min。
优选的,步骤(3)中混合方式为机械震动混合或搅拌混合,混合时间为5~ 60min。
优选的,步骤(4)所述成型大小为200mm×200mm×10mm;所述压制机压力为1MPa~15MPa,保压时间为5~60min;
优选的,步骤(5)中所述的真空绝热板封装时真空度为0.01Pa~10.00Pa。
所述干法制备的木棉纤维基真空绝热板在制备气相二氧化硅芯材中的应用。
与现有技术相比,本发明以木棉纤维、气相二氧化硅、隔热填料等干法制备木棉纤维基真空绝热板,工艺流程简单,生产成本低,制得的真空绝热板密度仅 80~140kg/cm3,性质稳定,导热系数高,在替换价格昂贵的气相二氧化硅芯材方面具有极大的应用潜力。
具体实施方式
下面结合实施例对本发明作进一步详细的描述,但本发明的实施方式不限于此。
实施例中所用试剂如无特殊说明均可从市场常规购得。
一种干法制备木棉纤维基真空绝热板的方法,包括以下步骤:
(1)先将木棉纤维、隔热填料进行粉碎,木棉纤维长度控制在0.5~5.0mm;隔热填料中聚酯纤维长度为0.5~12.0mm,平均直径为10~30μm,玻璃纤维平均长度为0.8~2.0mm,平均直径为12~38μm,植物纤维平均长度0.5~3mm,平均直径为10~30μm。
(2)将所用原料木棉纤维、气相二氧化硅、隔热填料、遮光剂放入干燥箱, 100~180℃干燥,至含水率≦5.0%;高阻气膜袋放入40~70℃干燥箱中烘烤 30~180min。
(3)将干燥后的原料按照一定比例进行混合,时间为5~60min,混合均匀后放入模具中,进行铺装,刮平后15~80℃下压制成型,压力为1~15MPa,保压时间为5~60min;
(4)将压制成型的芯材装入真空封装袋内抽真空,真空度为0.01~10.00Pa,然后封口。
本发明所得木棉纤维基真空绝热板的密度为80~140kg/cm3,导热系数为 4.0~10.0mW/(m.K),更优选为6.0~9.5mW/(m.K)。
为了更好地理解本发明,下面结合实施例对本发明做进一步地说明,但是本发明要求保护的范围并不局限于实施例表示的范围。
实施例1:
(1)将木棉纤维、聚酯纤维进行粉碎,然后将粉碎后的木棉纤维、聚酯纤维以及气相二氧化硅、遮光剂于105℃干燥箱中干燥24h;
(2)取20份气相二氧化硅,20份聚酯纤维和10份遮光剂与干燥后的50份木棉纤维进行机械搅拌混合,混合时间为30min;
(3)将混合物料放入模具中,表面刮平,对其施加10MPa的压力,压制温度为35℃,保压5min后得到低密度木棉纤维基芯材,厚度为10mm,密度为106 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.05 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为 15℃,热板温度为35℃),导热系数为6.3mW/(m.K)。
实施例2:
(1)将木棉纤维、聚酯纤维、植物纤维进行粉碎,然后将粉碎后的木棉纤维、聚酯纤维、植物纤维以及气相二氧化硅、遮光剂于120℃干燥箱中干燥16h;
(2)取20份气相二氧化硅,10份聚酯纤维,5份植物纤维和5份遮光剂与干燥后的60份木棉纤维进行机械搅拌混合,混合时间为50min;
(3)将混合物料放入模具中,表面刮平,对其施加8MPa的压力,压制温度为25℃,保压15min后得到低密度木棉纤维基芯材,厚度为10mm,密度为98 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.01 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为 15℃,热板温度为35℃),导热系数为5.8mW/(m.K)。
实施例3:
(1)将木棉纤维、玻璃纤维进行粉碎,然后将粉碎后的木棉纤维、玻璃纤维以及气相二氧化硅、遮光剂于150℃干燥箱中干燥4h;
(2)取40份气相二氧化硅,5份玻璃纤维和5份遮光剂与干燥后的50份木棉纤维进行机械搅拌混合,混合时间为60min;
(3)将混合物料放入模具中,表面刮平,对其施加12MPa的压力,压制温度为25℃,保压5min后得到低密度木棉纤维基芯材,厚度为10mm,密度为121 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.10 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为15℃,热板温度为35℃),导热系数为5.3mW/(m.K)。
实施例4:
(1)将木棉纤维、玻璃纤维进行粉碎,然后将粉碎后的木棉纤维、玻璃纤维以及气相二氧化硅、遮光剂于120℃干燥箱中干燥8h;
(2)取10份气相二氧化硅,25份玻璃纤维和5份遮光剂与干燥后的60份木棉纤维进行机械搅拌混合,混合时间为40min;
(3)将混合物料放入模具中,表面刮平,对其施加10MPa的压力,压制温度为20℃,保压25min后得到低密度木棉纤维基芯材,厚度为10mm,密度为128 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.01 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为15℃,热板温度为35℃),导热系数为6.8mW/(m.K)。
实施例5:
(1)将木棉纤维、玻璃纤维进行粉碎,然后将粉碎后的木棉纤维、玻璃纤维以及气相二氧化硅、遮光剂于135℃干燥箱中干燥7h;
(2)取20份气相二氧化硅,5份木纤维和5份遮光剂与干燥后的70份木棉纤维进行机械搅拌混合,混合时间为60min;
(3)将混合物料放入模具中,表面刮平,对其施加3MPa的压力,压制温度为30℃,保压5min后得到低密度木棉纤维基芯材,厚度为10mm,密度为88 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.05 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为 15℃,热板温度为35℃),导热系数为4.8mW/(m.K)。
实施例6:
(1)将木棉纤维、玻璃纤维进行粉碎,然后将粉碎后的木棉纤维、玻璃纤维以及气相二氧化硅、遮光剂于105℃干燥箱中干燥12h;
(2)取20份气相二氧化硅,35份玻璃纤维和5份遮光剂与干燥后的40份木棉纤维进行机械搅拌混合,混合时间为45min;
(3)将混合物料放入模具中,表面刮平,对其施加5MPa的压力,压制温度为26℃,保压5min后得到低密度木棉纤维基芯材,厚度为10mm,密度为138 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.05 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为 15℃,热板温度为35℃),导热系数为8.8mW/(m.K)。
实施例7:
(1)将木棉纤维、玻璃纤维进行粉碎,然后将粉碎后的木棉纤维、玻璃纤维以及气相二氧化硅、遮光剂于115℃干燥箱中干燥10h;
(2)取30份气相二氧化硅,20份玻璃纤维,10份木纤维和5份遮光剂与干燥后的35份木棉纤维进行机械搅拌混合,混合时间为55min;
(3)将混合物料放入模具中,表面刮平,对其施加3MPa的压力,压制温度为22℃,保压10min后得到低密度木棉纤维基芯材,厚度为10mm,密度为132 kg/cm3;
(4)将芯材放入高阻气膜袋中,进行真空封装得到真空绝热板,真空度为0.05 Pa。对所制得的真空绝热板采用双板法进行导热系数测试(设置冷板温度为 15℃,热板温度为35℃),导热系数为9.2mW/(m.K)。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (10)
1.一种木棉纤维基真空绝热板,其特征在于按重量份数主要包括:1~100份木棉纤维、0~50份气相二氧化硅、0~40份隔热填料、0~10份遮光剂,其中气相二氧化硅、隔热填料和遮光剂的用量不为0;所述真空绝热板的密度为80~140kg/cm3,导热系数为4~10mW/(m·K)。
2.根据权利要求1所述的木棉纤维基真空绝热板,其特征在于:
所述木棉纤维基真空绝热板,按重量份数主要包括:40~80份木棉纤维、10~50份气相二氧化硅、5~30份隔热填料、5~10份遮光剂。
3.根据权利要求1所述的木棉纤维基真空绝热板,其特征在于:
所述聚酯纤维长度为0.5~12.0mm,平均直径为10~30μm;所述玻璃纤维平均长度为0.8~2.0mm,平均直径为12~38μm;所述植物纤维平均长度0.5~3mm,平均直径为10~30μm。
4.一种制备权利要求1所述的木棉纤维基真空绝热板的方法,其特征在于:
(1)粉碎:将木棉纤维及隔热填料利用粉碎机粉碎;
(2)烘干:将所用原料及高阻气膜袋烘干;
(3)配料:将干燥后的原料按照比例混合均匀;
(4)铺装成型:将混合好的配料放入模具中进行铺装,并通过压机压制成型,即得真空绝热板芯材;
(5)封装:将成型芯材放入高阻气膜袋中,进行真空封装,最后得到木棉纤维基真空绝热板。
5.根据权利要求4所述的方法,其特征在于:
步骤(2)中,所述烘干方式为微波干燥、真空干燥或鼓风干燥中的一种,烘干温度为100~180℃,烘干至含水率≦5.0%。
6.根据权利要求4所述的方法,其特征在于:
步骤(2)中,所述高阻气膜袋的烘干温度为40~70℃,烘干时间为30~180min。
7.根据权利要求4所述的方法,其特征在于:步骤(3)中混合方式为机械震动混合或搅拌混合,混合时间为5~60min。
8.根据权利要求4所述的方法,其特征在于:步骤(4)所述成型大小为200mm×200mm×10mm;所述压制机压力为1MPa~15MPa,保压时间为5~60min。
9.根据权利要求4所述的方法,其特征在于:步骤(5)中所述的真空绝热板封装时真空度为0.01Pa~10.00Pa。
10.权利要求1所述的木棉纤维基真空绝热板在制备气相二氧化硅芯材中的应用。
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