CN112608101A - 一种低容重无机复合聚苯不燃保温材料及其制备方法 - Google Patents
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Abstract
本发明公开了一种低容重无机复合聚苯不燃保温材料及其制备方法,涉及建筑保温材料技术领域,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒20‑30份、硅酸盐水泥40‑60份、粉煤灰60‑40份、膨胀玻化微珠7‑12份、阻燃剂1‑5份、硅微粉1‑3份、发泡剂2‑5份、稳泡剂0.3‑0.5份、促凝剂0.1‑0.3份、水适量;其中,硅酸盐水泥和粉煤灰重量份之和为100份;其制备方法步骤如下:将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;将混合物料浇注到模具中,模压成型,养护,即得。本发明保温材料具有很好的孔隙结构,隔热保温防火,且材料容重小、抗压强度高。
Description
技术领域
本发明涉及建筑保温材料技术领域,尤其涉及一种低容重无机复合聚苯不燃保温材料及其制备方法。
背景技术
无机复合聚苯不燃保温板是一款A级防火保温材料,是以聚苯乙烯泡沫颗粒或板材为保温基体,使用非菱镁类无机材料处理剂复合制成的匀质板状不燃制品。在受火状态下具有一定的形状保持能力且不产生熔融滴落物,燃烧性能等级达到A级,其可广泛应用于传统薄抹灰系统和保温装饰板外墙外保温系统。然而,现有市面上的无机复合聚苯不燃材料存在容重大、保温隔热效果不佳等问题。
发明内容
基于背景技术存在的技术问题,本发明提出了一种低容重无机复合聚苯不燃保温材料及其制备方法,所得保温材料具有很好的孔隙结构,隔热保温防火,且材料容重小、抗压强度高。
本发明提出的一种低容重无机复合聚苯不燃保温材料,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒20-30份、硅酸盐水泥40-60份、粉煤灰60-40份、膨胀玻化微珠7-12份、阻燃剂1-5份、硅微粉1-3份、发泡剂2-5份、稳泡剂0.3-0.5份、促凝剂0.1-0.3份、水适量;其中,硅酸盐水泥和粉煤灰重量份之和为100份。
优选地,所述碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将多壁碳纳米管超声分散到水中,然后加入到双氧水中进行刻蚀处理,离心洗涤、干燥,然后将其加入浓硫酸和浓硝酸组成的混酸中进行酸化处理,过滤洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
优选地,所述碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将1份多壁碳纳米管超声分散到7-10份水中,超声分散20-30min,然后加入到35%双氧水中,多壁碳纳米管和35%双氧水的重量体积比为1:30-40g/mL,升温至125-135℃,冷凝回流3-4h进行刻蚀处理,离心洗涤、干燥,然后将其加入体积比为1:1的浓硫酸和浓硝酸组成的混酸中,料液比为1:20-30g/mL,超声分散20-30min,升温至125-135℃反应,冷凝回流1-2h进行酸化处理,静置过滤、洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,挤出温度为180-190℃,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
优选地,所述多壁碳纳米管为经纯化预处理后的多壁碳纳米管。
优选地,所述阻燃剂为聚磷酸铵。
优选地,所述发泡剂为35%双氧水,稳泡剂为聚丙烯酰胺,促凝剂为碳酸锂。
本发明还提出了一种上述低容重无机复合聚苯不燃保温材料的制备方法,包括以下步骤:
S1、将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;
S2、将混合物料浇注到模具中,模压成型,养护,即得;
优选地,控制混合物料中水灰比为0.45-0.48。
有益效果:本发明在泡沫混凝土基料中添加聚苯乙烯泡沫颗粒,在保证混凝土强度和不燃前提下,提高材料的保温隔热性能和低容重,所得保温材料具有很好的孔隙结构,隔热保温防火,且材料容重小、抗压强度高。
碳纳米管/聚苯乙烯泡沫颗粒的制备中,采用双氧水对其进行刻蚀得到多孔碳纳米管,然后再进行强酸氧化,使得碳纳米管末端和缺陷处产生羧基和羟基等,提高碳纳米管表面官能团含量,减少其相互缠绕聚集现象,改善碳纳米管在聚苯乙烯中的分散能力。以该改性碳纳米管为成核剂,将其与聚苯乙烯进行共混,所得聚苯乙烯泡沫颗粒的泡孔尺寸变小,尺寸也更加集中和均匀,提高发泡质量,改善材料的隔热保温效果。
具体实施方式
下面,通过具体实施例对本发明的技术方案进行详细说明。
实施例1
本发明提出的一种低容重无机复合聚苯不燃保温材料,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒20份、硅酸盐水泥40份、粉煤灰60份、膨胀玻化微珠12份、聚磷酸铵阻燃剂1份、硅微粉3份、35%双氧水发泡剂5份、聚丙烯酰胺稳泡剂0.5份、碳酸锂促凝剂0.3份、水适量。
其中,碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将1份经纯化预处理后的多壁碳纳米管超声分散到7份水中,超声分散20min,然后加入到35%双氧水中,多壁碳纳米管和35%双氧水的重量体积比为1:30g/mL,升温至125℃,冷凝回流4h进行刻蚀处理,离心洗涤、干燥,然后将其加入体积比为1:1的浓硫酸和浓硝酸组成的混酸中,料液比为1:20g/mL,超声分散20min,升温至125℃反应,冷凝回流2h进行酸化处理,静置过滤、洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,改性碳纳米管和聚苯乙烯的重量比为0.5:100,挤出温度为180℃,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
其制备方法,包括以下步骤:
S1、将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;控制混合物料中水灰比为0.45;
S2、将混合物料浇注到模具中,模压成型,养护,即得。
实施例2
本发明提出的一种低容重无机复合聚苯不燃保温材料,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒24份、硅酸盐水泥50份、粉煤灰50份、膨胀玻化微珠8份、聚磷酸铵阻燃剂2.5份、硅微粉1.5份、35%双氧水发泡剂4份、聚丙烯酰胺稳泡剂0.35份、碳酸锂促凝剂0.2份、水适量。
其中,碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将1份经纯化预处理后的多壁碳纳米管超声分散到8份水中,超声分散25min,然后加入到35%双氧水中,多壁碳纳米管和35%双氧水的重量体积比为1:35g/mL,升温至125℃,冷凝回流3.5h进行刻蚀处理,离心洗涤、干燥,然后将其加入体积比为1:1的浓硫酸和浓硝酸组成的混酸中,料液比为1:25g/mL,超声分散20min,升温至130℃反应,冷凝回流1h进行酸化处理,静置过滤、洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,改性碳纳米管和聚苯乙烯的重量比为1:100,挤出温度为185℃,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
其制备方法,包括以下步骤:
S1、将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;控制混合物料中水灰比为0.46;
S2、将混合物料浇注到模具中,模压成型,养护,即得。
实施例3
本发明提出的一种低容重无机复合聚苯不燃保温材料,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒27份、硅酸盐水泥55份、粉煤灰45份、膨胀玻化微珠10份、聚磷酸铵阻燃剂3份、硅微粉2份、35%双氧水发泡剂2.5份、聚丙烯酰胺稳泡剂0.4份、碳酸锂促凝剂0.2份、水适量。
其中,碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将1份经纯化预处理后的多壁碳纳米管超声分散到9份水中,超声分散25min,然后加入到35%双氧水中,多壁碳纳米管和35%双氧水的重量体积比为1:40g/mL,升温至130℃,冷凝回流3.5h进行刻蚀处理,离心洗涤、干燥,然后将其加入体积比为1:1的浓硫酸和浓硝酸组成的混酸中,料液比为1:30g/mL,超声分散25min,升温至135℃反应,冷凝回流1.5h进行酸化处理,静置过滤、洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,改性碳纳米管和聚苯乙烯的重量比为2:100,挤出温度为185℃,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
其制备方法,包括以下步骤:
S1、将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;控制混合物料中水灰比为0.47;
S2、将混合物料浇注到模具中,模压成型,养护,即得。
实施例4
本发明提出的一种低容重无机复合聚苯不燃保温材料,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒30份、硅酸盐水泥60份、粉煤灰40份、膨胀玻化微珠7份、聚磷酸铵阻燃剂5份、硅微粉1份、35%双氧水发泡剂2份、聚丙烯酰胺稳泡剂0.3份、碳酸锂促凝剂0.1份、水适量。
其中,碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将1份经纯化预处理后的多壁碳纳米管超声分散到10份水中,超声分散30min,然后加入到35%双氧水中,多壁碳纳米管和35%双氧水的重量体积比为1:40g/mL,升温至135℃,冷凝回流3h进行刻蚀处理,离心洗涤、干燥,然后将其加入体积比为1:1的浓硫酸和浓硝酸组成的混酸中,料液比为1:30g/mL,超声分散30min,升温至135℃反应,冷凝回流1h进行酸化处理,静置过滤、洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,改性碳纳米管和聚苯乙烯的重量比为4:100,挤出温度为190℃,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
其包括以下步骤:
S1、将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;控制混合物料中水灰比为0.48;
S2、将混合物料浇注到模具中,模压成型,养护,即得。
对比例
与实施例1相比,区别仅在于碳纳米管/聚苯乙烯泡沫颗粒的制备中不含刻蚀处理,其余均相同。
对本发明实施例和对比例中制备的低容重无机复合聚苯不燃保温材料的性能、碳纳米管/聚苯乙烯泡沫颗粒的平均孔径进行测试,结果如表1所示。
表1实施例1-4和对比例中制备的保温材料的性能数据
实施例1 | 实施例2 | 实施例3 | 实施例4 | 对比例 | |
容重kg/m3 | 330 | 323 | 320 | 318 | 331 |
抗压强度MPa | 1.28 | 1.30 | 1.34 | 1.27 | 1.29 |
泡沫颗粒孔径μm | 19.18 | 18.35 | 16.21 | 18.44 | 21.65 |
热传导率W/(m·k) | 0.052 | 0.45 | 0.042 | 0.048 | 0.075 |
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (8)
1.一种低容重无机复合聚苯不燃保温材料,其特征在于,其原料按重量份包括:碳纳米管/聚苯乙烯泡沫颗粒20-30份、硅酸盐水泥40-60份、粉煤灰60-40份、膨胀玻化微珠7-12份、阻燃剂1-5份、硅微粉1-3份、发泡剂2-5份、稳泡剂0.3-0.5份、促凝剂0.1-0.3份、水适量;其中,硅酸盐水泥和粉煤灰重量份之和为100份。
2.根据权利要求1所述的低容重无机复合聚苯不燃保温材料,其特征在于,所述碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将多壁碳纳米管超声分散到水中,然后加入到双氧水中进行刻蚀处理,离心洗涤、干燥,然后将其加入浓硫酸和浓硝酸组成的混酸中进行酸化处理,过滤洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
3.根据权利要求2所述的低容重无机复合聚苯不燃保温材料,其特征在于,所述碳纳米管/聚苯乙烯泡沫颗粒的制备如下:将1份多壁碳纳米管超声分散到7-10份水中,超声分散20-30min,然后加入到35%双氧水中,多壁碳纳米管和35%双氧水的重量体积比为1:30-40g/mL,升温至125-135℃,冷凝回流3-4h进行刻蚀处理,离心洗涤、干燥,然后将其加入体积比为1:1的浓硫酸和浓硝酸组成的混酸中,料液比为1:20-30g/mL,超声分散20-30min,升温至125-135℃反应,冷凝回流1-2h进行酸化处理,静置过滤、洗涤、干燥,得改性碳纳米管;将改性碳纳米管超声分散到水中,采用水辅混炼挤出法,将改性碳纳米管分散液注入到聚苯乙烯熔体中进行混炼挤出,挤出温度为180-190℃,制粒,得碳纳米管/聚苯乙烯复合粒料;以CO2为发泡剂,对碳纳米管/聚苯乙烯复合粒料进行发泡处理,即得碳纳米管/聚苯乙烯泡沫颗粒。
4.根据权利要求2或3所述的低容重无机复合聚苯不燃保温材料,其特征在于,所述多壁碳纳米管为经纯化预处理后的多壁碳纳米管。
5.根据权利要求1所述的低容重无机复合聚苯不燃保温材料,其特征在于,所述阻燃剂为聚磷酸铵。
6.根据权利要求1所述的低容重无机复合聚苯不燃保温材料,其特征在于,所述发泡剂为35%双氧水,稳泡剂为聚丙烯酰胺,促凝剂为碳酸锂。
7.一种基于权利要求1-6任一项所述的低容重无机复合聚苯不燃保温材料的制备方法,其特征在于,包括以下步骤:
S1、将硅酸盐水泥、粉煤灰、膨胀玻化微珠、发泡剂、稳泡剂、促凝剂、阻燃剂和硅微粉混合,加水搅拌,然后加入碳纳米管/聚苯乙烯泡沫颗粒,先低速搅拌再高速搅拌,得混合物料;
S2、将混合物料浇注到模具中,模压成型,养护,即得。
8.根据权利要求7所述的低容重无机复合聚苯不燃保温材料的制备方法,其特征在于,控制混合物料中水灰比为0.45-0.48。
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