CN106380165A - 一种活体内生植物纤维管复合保温板及其制备方法 - Google Patents
一种活体内生植物纤维管复合保温板及其制备方法 Download PDFInfo
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Classifications
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- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- E—FIXED CONSTRUCTIONS
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
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- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
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- C—CHEMISTRY; METALLURGY
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- E—FIXED CONSTRUCTIONS
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- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
本发明属于建筑材料技术领域,涉及一种保温材料的制备方法,特别涉及一种活体内生植物纤维管复合保温板及其制备方法。一种活体内生植物纤维管复合保温板,其主要是由无机轻骨料压制成型,该活体内生植物纤维管复合保温板的原料中包括植物种子,植物种子的加入量为10‑100kg每立方米无机轻骨料,与无机轻骨料混合后的植物种子适宜条件下发芽,在保温板压制成型的过程中干燥后形成分布在复合保温板内的相互交织的植物纤维细管。本发明的活体内生植物纤维管复合保温板,利用了天然、可再生的生物质材料,无机原料消耗少,产量高,经济效益明显增加,同时节约了能源。
Description
技术领域
本发明属于建筑材料技术领域,涉及一种保温材料的制备方法,特别涉及一种活体内生植物纤维管复合保温板及其制备方法。
背景技术
目前的保温板均为膨胀珍珠岩或微孔硅酸钙材料制得。珍珠岩保温板质轻且保温隔热性能优良防火、防尘、防潮,不变形改性、不腐烂发霉、无毒无味憎水性能好,憎水率可达98%以上施工安全简单易行,主要用于住宅、工业、公共建筑的墙体及楼房屋面、游泳池、冷库、锅炉及一些防水等特殊要求的保温工程。目前保温板均为无机或有机材料产品,现有的珍珠岩保温板等无机保温板具有易碎,吸水率高和导热系数大的问题,在实际应用中仍存在较多的缺陷。
申请号为CN00101448.X的中国发明专利提供了一种憎水无机多孔绝热制品,其密度为200—250kg/m3,抗压强度≥0.5MPa,抗折强度≥0.05MPa,适用温度-100—600℃,导热系数(常温)≤0.06W/M·K,憎水率≥98%,其工艺配方为:憎水珠光砂60—100kg,纤维水镁石15—20kg,硅酸钠溶液100—160kg,氟硅酸钠10—15kg,白乳胶2—6kg,甲基硅醇钠6—10kg。然而,珠光砂容重较轻,颗粒比较小,比表面积大,吸水率非常高。普通的憎水剂与珠光砂混合后,大部分都进入珠光砂颗粒内部,使珠光砂的容重增加,导致制得产品的容重大大增加,进而导热系数也大大增加。而且憎水剂对珠光砂的憎水处理效果仍不理想,得到产品的吸水率仍然很高。现有的以珍珠岩等无机材料制成的保温板,导热系数高,保温性能仍不理想。
发明内容
本发明提供一种容重轻、导热系数和吸水率较低的活体内生植物纤维管复合保温板,该保温板采用植物种子发芽提供具有加强保温和抗裂性能的植物纤维管。
本发明还提供一种活体内生植物纤维管复合保温板的制备方法,利用本法制得的活体内生植物纤维管复合保温板导热系数和吸水率较低,性能优良。
本发明解决其技术问题所采用的技术方案是:
一种活体内生植物纤维管复合保温板,其主要是由无机轻骨料压制成型,该活体内生植物纤维管复合保温板的原料中包括植物种子,植物种子的加入量为10-100kg每立方米无机轻骨料,与无机轻骨料混合后的植物种子适宜条件下发芽,在保温板压制成型的过程中干燥后形成分布在复合保温板内的相互交织的植物纤维细管。本发明采用小颗粒的植物种子和无机轻骨料一起,均匀搅拌,加水混合,让植物种子自然发芽生长,在混合料中产生大量交织的芽体,这些芽体均匀分散在无机轻骨料颗粒中间,形成散的颗粒状料体,加工生产保温板时作为无机轻骨料的代替品,与水玻璃、水泥、有机胶水等胶粘剂搅拌均匀,压制成型,烘干制得保温板,其密度为130-180kg/m3,导热系数为0.038-0.045W/m·k,吸水率2.5-3.0(v/v)%。
芽体为活体结构,与胶粘剂等其他原料结合为一个整体,在板材烘干脱水的过程中,芽体随之脱水,在保温板内形成无数个空心的植物纤维细管。鲜活的芽体在压制过程中与胶粘剂固定在一起,脱水时,芽体的外壁结构与胶粘剂固定,而芽体内部干燥脱水后形成空心的植物纤维细管。这些植物纤维细管有效的阻断了板材内的空气对流,这些植物纤维细管占用成型后板材内较大的空间,因此板材的干密度相较于同类产品降低10-15%。植物纤维细管的存在降低了产品的导热系数,增加了板材的抗压强度和抗折强度。因此,本发明的产品具有更加优异的保温防开裂效果,防火性能达到A级,并且比同类型产品重量轻。
植物种子因品种不同,发芽时间也不一样,一般发芽时间为1-10天。植物发芽消耗掉种子内大量的营养物质,形成天然的植物抗裂纤维。
作为优选,所述的植物种子粒径<3mm。作为优选,所述的植物种子选自草籽、菜籽、花卉籽中的一种或两种以上。菜籽指的是常见的蔬菜种子如油菜籽、苋菜籽、香菜籽、生菜籽等等,花卉籽指的是常见的开花植物种子。
硬脂酸钙具有疏水性,粉末状,与无机轻骨料混合后包裹在无机轻骨料颗粒的表面,并不会进入无机轻骨料颗粒内部。可以防止后续加入的防水剂等助剂进入无机轻骨料颗粒内部,避免增大产品的容重,使制得的保温板产品吸水率降低。无机轻骨料先与硬脂酸钙混合后,再与防水剂等混合,此时防水剂和胶粘剂(如水玻璃)均匀的粘在无机轻骨料表面,因此,本法固化后得到的板材具有很好的保温特性,密度、导热系数和吸水率均较低,具有很高的经济效益。植物种子的加入可替代部分无机轻骨料,有利于降低产品成本。
本发明中的植物纤维细管可代替本领域常用的添加剂——抗裂纤维,如聚丙烯短纤维,聚丙烯短纤维导热系数高,价格高,而且是有机材料,会影响阻燃性能。
作为优选,该活体内生植物纤维管复合保温板主要是由以下组分混合固化制成:硬脂酸钙2-6%,无机轻骨料35-50%,胶粘剂35-50%,硅烷偶联剂0.5-5%,固化剂1-3%,防水剂0.5-5%,上述原料总重量记为100%,原料中还包括10-100kg的植物种子/立方米无机轻骨料。
作为优选,所述胶粘剂选自水玻璃、水泥或有机胶水中的一种或几种,其中水玻璃的模数为2.8~3.0;所述的固化剂为磷酸硅或氟硅酸钠,所述的防水剂为氟系防水剂。本发明采用的氟系防水剂是一种用于纺织品防水防油整理的含氟聚合物乳液,一般用于纺织品领域,经发明人多次试验,发现该防水剂在该保温板的制备中起到了较好的防水作用,可以与本发明配方有机组合,使最终产品吸水率较低,能达到稳定的拨水拨油效果,同时并不影响产品的其它性能。
作为优选,无机轻骨料选自珠光砂、膨胀蛭石或无机纤维中的一种或几种,其中所述的无机纤维为陶瓷纤维、短切玻璃纤维和矿物纤维中的一种或几种组合。
一种所述的活体内生植物纤维管复合保温板的制备方法,该方法是将无机轻骨料与植物种子混合均匀,加适量水并控制温度和湿度使植物种子发芽,发芽后得到的混合料代替无机轻骨料进行制备保温板。
作为优选,该方法包括如下步骤:a、将无机轻骨料与植物种子混合均匀,加适量水并控制温度和湿度使植物种子发芽,发芽后得到的混合料与硬脂酸钙混合均匀,b、根据原料配比向a步得到的混合物中加入固化剂和硅烷偶联剂,混合均匀,c、向b步得到的混合物中喷入由所述的胶粘剂和防水剂组成的混合液,混合均匀后压制成板,然后进行干燥处理,固化后得到产品。
作为优选,所述的干燥处理是将制成的板经过微波加热1-5min,微波频率为2450±50MHz。
作为优选,控制植物种子发芽后的芽体长度为0.5-8cm范围内。
本发明制得的活体内生植物纤维管复合保温板导热系数具有很大的优势,这是现有的珍珠岩保温板无法比拟的,具体表现在以下几个方面:
1、工艺简单、成本相对较低,由于产品容重较轻,运输成本也大大降低。(容重决定一个材料的运输成本,因此容重越轻越好。)
2、产品的导热系数和吸水率均较低,具有更加优异的保温效果,防火性能达到A级,并且比同类型产品重量轻。
3、本发明产品的干密度相较于同类产品降低10-15%。植物纤维细管的存在降低了产品的导热系数,增加了板材的抗压强度和抗折强度。因此,本发明的产品具有更加优异的保温防开裂效果。
4、采用本法生产的活体内生植物纤维管复合保温板,利用了天然、可再生的生物质材料,无机原料消耗少,产量高,经济效益明显增加,同时节约了能源。
具体实施方式
下面通过具体实施例,对本发明的技术方案作进一步的具体说明。应当理解,本发明的实施并不局限于下面的实施例,对本发明所做的任何形式上的变通和/或改变都将落入本发明保护范围。
在本发明中,若非特指,所有的份、百分比均为重量单位,所有的设备和原料等均可从市场购得或是本行业常用的。本发明所指的水玻璃即硅酸钠溶液,为建筑领域常用材料。氟系防水剂,厦门安科达化工。
本发明中产品的密度和吸水率等指标采用GB/T5486.3-2001无机硬质绝热制品试验方法进行测量。
实施例1-8:
一种活体内生植物纤维管复合保温板,其原料配方见表2,其制备方法如下:
按表1中的配方,将无机轻骨料与植物种子混合均匀,然后加适量水,在23~27℃的温度下和保持湿度60%以上使植物种子发芽,本实施例选择的植物种子是苋菜籽,发芽2天左右,芽体已在无机轻骨料内均匀分布,芽体长度1-1.5cm左右,选择发芽后得到的混合料与硬脂酸钙(粉末状)进行预混2-5分钟,使硬脂酸钙粉末均匀涂布在无机轻骨料的表面孔隙,混合均匀后再加入固化剂(实施例1-5为磷酸硅,实施例6-8为氟硅酸钠)和硅烷偶联剂,混合均匀,然后在混合好的物料中喷入由胶粘剂(其中,水玻璃的模数为2.8~3.0)和氟系防水剂组成的混合液,搅拌均匀,取拌合料投入液压机内压制成板,拌合料与成型板材的体积比为1.5-2.2:1,然后进行微波干燥处理,固化后得到活体内生植物纤维管复合保温板产品。
表1中,实施例4的无机纤维为陶瓷纤维,实施例6为矿物纤维。
经发明人多次试验,依照本实施例1的方法和配方在同等条件下,未加入硬脂酸钙制得的板材抗压强度为0.40Mpa,加入硬脂酸钙制得的板材抗压强度为0.48Mpa。经发明人多次试验,油菜籽、香菜籽、生菜籽等常见菜籽以及一些花卉籽均可实现本发明所述的效果。
本实施例中的微波干燥可由烘房内80-115℃的烘烤代替,但是微波干燥使得到的产品不易变形,不易开裂,而且抗压强度提高了14%。一般生产的板材为3-8cm厚,因此微波干燥的时间也相应的为1-5min,微波频率为2450±50MHz。
表1(单位:kg)
经测试,以上各实施例制得的活体内生植物纤维管复合保温板产品性能与现有的憎水珍珠岩保温板相比,数据见表2。
表2憎水珍珠岩保温板与活体内生植物纤维管复合保温板的性能指标对比
经验证,本发明的产品导热系数较低,植物纤维细管提高了产品的抗压和抗折强度。因此,本发明的产品具有更加优异的保温效果,防火性能达到A级,并且比同类型产品重量轻。
以上所述的实施例只是本发明的一种较佳的方案,并非对本发明作任何形式上的限制,在不超出权利要求所记载的技术方案的前提下还有其它的变体及改型。
Claims (10)
1.一种活体内生植物纤维管复合保温板,其主要是由无机轻骨料压制成型,其特征在于:该活体内生植物纤维管复合保温板的原料中包括植物种子,植物种子的加入量为10-100kg每立方米无机轻骨料,与无机轻骨料混合后的植物种子适宜条件下发芽,在保温板压制成型的过程中干燥后形成分布在复合保温板内的相互交织的植物纤维细管。
2.权利要求1所述的活体内生植物纤维管复合保温板,其特征在于:所述的植物种子粒径<3mm。
3.权利要求1所述的活体内生植物纤维管复合保温板,其特征在于:所述的植物种子选自草籽、菜籽、花卉籽中的一种或两种以上。
4.权利要求1所述的活体内生植物纤维管复合保温板,其特征在于:该活体内生植物纤维管复合保温板主要是由以下组分混合固化制成:
硬脂酸钙2-6%,
无机轻骨料35-50%,
胶粘剂35-50%,
硅烷偶联剂0.5-5%,
固化剂1-3%,
防水剂0.5-5%,上述原料总重量记为100%,原料中还包括10-100kg的植物种子/立方米无机轻骨料。
5.根据权利要求1所述的活体内生植物纤维管复合保温板,其特征在于:所述胶粘剂选自水玻璃、水泥或有机胶水中的一种或几种,其中水玻璃的模数为2.8~3.0;所述的固化剂为磷酸硅或氟硅酸钠,所述的防水剂为氟系防水剂。
6.根据权利要求1所述的活体内生植物纤维管复合保温板,其特征在于:无机轻骨料选自珠光砂、膨胀蛭石或无机纤维中的一种或几种,其中所述的无机纤维为陶瓷纤维、短切玻璃纤维和矿物纤维中的一种或几种组合。
7.一种权利要求1所述的活体内生植物纤维管复合保温板的制备方法,其特征在于该方法是将无机轻骨料与植物种子混合均匀,加适量水并控制温度和湿度使植物种子发芽,发芽后得到的混合料代替无机轻骨料进行制备保温板。
8.根据权利要求7所述的活体内生植物纤维管复合保温板的制备方法,其特征在于该方法包括如下步骤:
a、将无机轻骨料与植物种子混合均匀,加适量水并控制温度和湿度使植物种子发芽,发芽后得到的混合料与硬脂酸钙混合均匀,
b、根据原料配比向a步得到的混合物中加入固化剂和硅烷偶联剂,混合均匀,
c、向b步得到的混合物中喷入由所述的胶粘剂和防水剂组成的混合液,混合均匀后压制成板,然后进行干燥处理,固化后得到产品。
9.根据权利要求8所述的活体内生植物纤维管复合保温板的制备方法,其特征在于:所述的干燥处理是将制成的板经过微波加热1-5min,微波频率为2450±50MHz。
10.根据权利要求8所述的活体内生植物纤维管复合保温板的制备方法,其特征在于:控制植物种子发芽后的芽体长度为0.5-8cm范围内。
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