CN111439004A - 一种防霉耐腐秸秆屋顶板材及其制备方法 - Google Patents
一种防霉耐腐秸秆屋顶板材及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种防霉耐腐秸秆屋顶板材及其制备方法。该方法先将草木灰与水混合形成草木灰溶液,将稻草秸秆浸泡于草木灰溶液后分离;再将其晾干‑浸油‑晾干‑编绳;将草木灰溶液加热蒸发掉水分,得到粉体A;将稻草秸秆按横向纵向交叉编织得到稻草秸秆网,将稻草秸秆网放置于热压机的模具中;将谷类作物秸秆用粉碎机粉碎,将其与粉体A和阻燃胶黏剂混合搅拌均匀后倒入模具中,先预压再热压成型;将稻草秸秆板外包裹上浸泡过生漆的麻布,再涂上阻燃胶黏剂,制成防霉耐腐秸秆屋顶板材。本发明的生产原料是农作物废弃料,生产节能环保,生产过程易于控制,生产成本低,且产品的耐火、耐水、保温、隔热、保温等综合性能优良,板材长期使用不开裂。
Description
技术领域
本发明具体涉及一种防霉耐腐秸秆屋顶板材及其制备方法。
背景技术
农作物秸秆是世界上数量最多的一种农业生产副产品,也是一种可以综合利用的重要生物资源。随着农业生产和农村能源事业的发展,秸秆出现大量的剩余,剩余秸秆的处理问题日渐凸显。秸秆具有优良的建筑性能,在人类建筑史,秸秆等植物性纤维都曾经被作为建筑材料使用,具有轻质、保温、隔热、吸声、韧性和节能的优良性能。因此,秸秆等废弃物的合理处理和资源化利用对清洁高效生产和可持续发展显得至关重要。目前市场上的屋面瓦多为玻璃钢瓦、沥青瓦、彩钢瓦、塑钢瓦等,且屋面板一般使用铝镁锰或合金等金属制成,保温性差,造价高,目前将秸秆制成屋面板还鲜有报道。秸秆作为农业副产品,来源广泛,容重低,且具有一定的韧性,将其作为原料经过一定的改造和加工,不仅经济实惠,还能有效提高屋面板的保温性能,具有环保节能的特性。
然而因受多种因素的制约,秸秆建材的发展遇到了瓶颈,在市场中并没有很好的表现。目前,对于秸秆板材的研究方向,大多集中在如何提高秸秆和胶黏剂的粘合性能上。但是秸秆中含有果胶质、灰分等物质,如果没有进行纤维素的提取,胶黏剂难以进入秸秆孔隙中,导致秸秆产品性能差,没有很好的市场。目前将其中的纤维素分解出来,一般采用苯酚和氢氧化钠进行处理,大规模制取,将面临处理大量污水的难题,不仅成本会大幅度上升,而且目前处理技术上也存在问题。同时秸秆建材在潮湿环境中后期可能会产生膨胀开裂的危险现象,另外在南方潮湿环境中秸秆在生产和使用过程中可能产生发霉现象也未考虑。这均是需要对秸秆进行深入研究,探索出一种可不涉及大量污水处理,提升秸秆板力学性能并且成本较低的商业性开发的方案。
发明内容
针对现有技术存在的问题,本发明提供一种防霉耐腐秸秆屋顶板材及其制备方法。
为达到上述目的,本发明提供的技术方案为:一种防霉耐腐秸秆屋顶板材的制备方法,包括以下步骤:
(1)先按稻草秸秆和谷类秸秆按质量比3-6:7-12的比例混合进行焚烧,得到草木灰,再将草木灰与水混合形成草木灰溶液,另取稻草秸秆浸泡于草木灰溶液中一段时间,然后将稻草秸秆和草木灰溶液分离;
(2)将分离出的稻草秸秆晾干后浸泡于油中,待一段时间后取出晾干,然后将稻草秸秆编织的草绳,草绳的直径为2-6cm;
(3)将步骤1中的草木灰溶液加热蒸发掉水分,得到粉体A;
(4)将草绳按横向纵向交叉编织并通过外扎绳紧固得到网格状的稻草秸秆网,单格尺寸为3-10cm*3-10cm,将稻草秸秆网铺装于热压机的模具中;
(5)将谷类作物秸秆用粉碎机粉碎至长度 5cm 以下,然后将其与粉体A和阻燃胶黏剂按质量比10:0.1-0.4:1-3的比例混合搅拌均匀后倒入热压机的模具中,先预压后热压成型;
(6)将麻布浸泡于生漆2-12h,取出麻布包裹于稻草秸秆板上,然后刮去麻布上多余的生漆后晾干,最后用阻燃胶黏剂涂满外周,制成防霉耐腐秸秆屋顶板材。
所述谷类作物秸秆为小麦秸秆、大麦秸秆、黑麦秸秆、燕麦秸秆、黑小麦秸秆、稻秸秆中的一种或多种混合。
所述草木灰溶液的浓度为30-50克/升,所述稻草秸秆进行10-60分钟浸渍。
所述谷类作物秸秆的长度为0.5-2cm。
采用草木灰溶液在温度为40-60℃进行浸渍。
所述谷类作物秸秆粉碎后经过以下预处理:将粉碎后的谷类作物秸秆放置于反应容器中,然后通过加入压力为10×105至15×105帕斯卡和温度180-210℃的饱和蒸汽,然后在蒸煮一段时间后减压使反应容器压力降回到大气压后取出谷类作物秸秆。
所述阻燃胶黏剂由以下方法制得:按重量份数将苯丙乳液40-55份、水80-100份、硫铝酸盐水泥20-30份、氢氧化镁10-15份、贝壳粉3-5份、甲基膦酸二甲酯3-5份、三乙烯四胺3-5份、硼酸4-8份、聚磷酸铵4-6份、聚二甲基硅氧烷2-6份、尿素4-6份、聚酰胺多胺环氧氯丙烷5-9份加入到容器中搅拌均匀后制成阻燃胶黏剂。
上述制备方法制得的防霉耐腐秸秆屋顶板材为直板或波形板。
有益效果:
(1)生产原料农作物废弃料,采用草木灰处理去除表面的果胶层,表面粗糙度明显增加,秸秆半纤维素相对含量降低,增强了其黏合能力,相较于传统发明的碱处理方法具有相同效果还不污染环境节约成本,节能环保,并且将草木灰回收后用于秸秆板材中,还能有效地杀灭病原菌及病毒,同时配合最外层的麻布的防虫防霉作用,有效地起到防止秸秆霉变虫蛀。
(2)将谷类作物秸秆粉碎后经过以下预处理,其谷类作物秸秆会出现一定程度的软化或溶解,在秸秆板成型时谷类作物秸秆与阻燃胶黏剂充分接触,阻燃胶黏剂渗透到谷类作物秸秆纤维中。随板材成型时,渗透有阻燃胶黏剂的谷类作物秸秆与稻草秸秆交织在一起,增强稻草秸秆纤维与谷类作物秸秆的界面结合,提高了产品的力学性能及防水性能,具有良好的抗冲击性能,可以更广泛的应用于建筑行业中。
(3)稻草秸秆网结构配合麻布质地轻、强力大的特点,有效避免抹秸秆板材整体表面张力收缩以及外力引起的开裂,也提高了秸秆板材的抗冲击性和抗折性。同时包裹在最外层的麻布由于浸泡过生漆,使其秸秆板材形成一层具有较强的硬度和韧性的保护层,将原来柔性材料的秸秆板变成既有柔性又具有刚性的材料。
(4)可根据市场需求制备出厚度在5.0~16.0cm,密度在0.15g/cm3~0.50g/cm3的轻质保温、防虫防腐、耐腐性能的秸秆屋顶板材,集保温层、防水层、保护层于一体,平整度好,生产过程易于控制。
具体实施方式
实施例1
(1)先按稻草秸秆和谷类秸秆按质量比4:8的比例混合进行焚烧,得到草木灰,再将草木灰与水混合形成草木灰溶液,草木灰溶液的浓度为40克/升,另取稻草秸秆浸泡于草木灰溶液中30分钟,草木灰溶液的温度为50℃,然后将稻草秸秆和草木灰溶液分离;
(2)将分离出的稻草秸秆晾干后浸泡于油中,待一段时间后取出晾干,然后将稻草秸秆编织的草绳,草绳的直径为4cm;
(3)将步骤1中的草木灰溶液加热蒸发掉水分,得到粉体A;
(4)将草绳按横向纵向交叉编织并通过外扎绳紧固得到网格状的稻草秸秆网,单格尺寸为5cm*5cm,将稻草秸秆网铺装于热压机的模具中;
(5)将谷类作物秸秆用粉碎机粉碎至长度 5cm 以下(优选0.5-2cm),所述谷类作物秸秆为小麦秸秆、大麦秸秆、黑麦秸秆、燕麦秸秆、黑小麦秸秆、稻秸秆、玉米秸秆中的一种或多种混合,所述谷类作物秸秆粉碎后经过以下预处理:将粉碎后的谷类作物秸秆放置于反应容器中,然后通过加入压力为13×105帕斯卡和温度200℃的饱和蒸汽,然后在蒸煮一段时间后减压使反应容器压力降回到大气压后取出谷类作物秸秆;然后将其与粉体A和阻燃胶黏剂按质量比10:0.2:2.5的比例混合搅拌均匀后倒入热压机的模具中,先预压再热压成型,预压压力范围控制在0.1-1MPa,其预压力以保持压制的板坯中的纤维不脱落为宜,过预压的板坯进行热压,温度120~140℃,压力为1.47~2.5Mpa,时间40~50秒,以使粘结剂完全固化,其中所述阻燃胶黏剂由以下方法制得:按重量份数将苯丙乳液50份、水90份、硫铝酸盐水泥25份、氢氧化镁12份、贝壳粉4份、甲基膦酸二甲酯4份、三乙烯四胺4份、硼酸6份、聚磷酸铵5份、聚二甲基硅氧烷4份、尿素5份、聚酰胺多胺环氧氯丙烷7份加入到容器中搅拌均匀后制成阻燃胶黏剂;
(6)将麻布浸泡于生漆2-12h,取出麻布包裹于稻草秸秆板上,然后刮去麻布上多余的生漆后晾干,最后用阻燃胶黏剂涂满外周,制成防霉耐腐秸秆屋顶板材(直板);切边,使产品达到要求的几何尺寸。成品堆放:出厂也可以进行深加工。
经测试,在1000℃以上的高温或明火下不燃烧,经测试达到A级,符合国标GB8624-2006《建筑 材料及制品燃烧性能分级》的相关规定;导热系数在0.075(25℃w/m.k)保温隔热性能优良;使用寿命长,成品板不吸水,耐候性、耐冻融性均达到国标JGJ144-2004《外墙保温工程技术规定》的相关规定。对制得的秸秆屋顶板材参照国家标准进行性能检测,检测结果见表1。
实施例2
(1)先按稻草秸秆和谷类秸秆按质量比3:7的比例混合进行焚烧,得到草木灰,再将草木灰与水混合形成草木灰溶液,草木灰溶液的浓度为50克/升,另取稻草秸秆浸泡于草木灰溶液中60分钟,草木灰溶液的温度为60℃,然后将稻草秸秆和草木灰溶液分离;
(2)将分离出的稻草秸秆晾干后浸泡于油中,待一段时间后取出晾干,然后将稻草秸秆编织的草绳,草绳的直径为2cm;
(3)将步骤1中的草木灰溶液加热蒸发掉水分,得到粉体A;
(4)将草绳按横向纵向交叉编织并通过外扎绳紧固得到网格状的稻草秸秆网,单格尺寸为10cm*10cm,将稻草秸秆网铺装于热压机的模具中;
(5)将谷类作物秸秆用粉碎机粉碎至长度 5cm 以下(优选0.5-2cm),所述谷类作物秸秆为小麦秸秆、大麦秸秆、黑麦秸秆、燕麦秸秆、黑小麦秸秆、稻秸秆、玉米秸秆中的一种或多种混合,所述谷类作物秸秆粉碎后经过以下预处理:将粉碎后的谷类作物秸秆放置于反应容器中,然后通过加入压力为.15×105帕斯卡和温度210℃的饱和蒸汽,然后在蒸煮一段时间后减压使反应容器压力降回到大气压后取出谷类作物秸秆;然后将其与粉体A和阻燃胶黏剂按质量比10:0.1:2的比例混合搅拌均匀后倒入热压机的模具中,先预压再热压成型,预压压力范围控制在0.1-1MPa,其预压力以保持压制的板坯中的纤维不脱落为宜,过预压的板坯进行热压,温度120~140℃,压力为1.47~2.5Mpa,时间40~50秒,以使粘结剂完全固化,其中所述阻燃胶黏剂由以下方法制得:按重量份数将苯丙乳液40份、水80份、硫铝酸盐水泥20份、氢氧化镁10份、贝壳粉3份、甲基膦酸二甲酯3份、三乙烯四胺3份、硼酸4份、聚磷酸铵4份、聚二甲基硅氧烷2份、尿素4份、聚酰胺多胺环氧氯丙烷5份加入到容器中搅拌均匀后制成阻燃胶黏剂;
(6)将麻布浸泡于生漆2-12h,取出麻布包裹于稻草秸秆板上,然后刮去麻布上多余的生漆后晾干,最后用阻燃胶黏剂涂满外周,制成防霉耐腐秸秆屋顶板材(直板);切边,使产品达到要求的几何尺寸。成品堆放:出厂也可以进行深加工。
经测试,在1000℃以上的高温或明火下不燃烧,经测试达到A级,符合国标GB8624-2006《建筑 材料及制品燃烧性能分级》的相关规定;导热系数在0.082(25℃w/m.k)保温隔热性优良;使用寿命长,成品板不吸水,耐候性、耐冻融性均达到国标JGJ144-2004《外墙保温工程技术规定》的相关规定。对制得的秸秆屋顶板材参照国家标准进行性能检测,检测结果见表1。
实施例3
(1)先按稻草秸秆和谷类秸秆按质量比6:12的比例混合进行焚烧,得到草木灰,再将草木灰与水混合形成草木灰溶液,草木灰溶液的浓度为30克/升,另取稻草秸秆浸泡于草木灰溶液中10分钟,草木灰溶液的温度为40℃,然后将稻草秸秆和草木灰溶液分离;
(2)将分离出的稻草秸秆晾干后浸泡于油中,待一段时间后取出晾干,然后将稻草秸秆编织的草绳,草绳的直径为6cm;
(3)将步骤1中的草木灰溶液加热蒸发掉水分,得到粉体A;
(4)将草绳按横向纵向交叉编织并通过外扎绳紧固得到网格状的稻草秸秆网,单格尺寸为3cm*3cm,将稻草秸秆网铺装于热压机的模具中;
(5)将谷类作物秸秆用粉碎机粉碎至长度 5cm 以下(优选0.5-2cm),所述谷类作物秸秆为小麦秸秆、大麦秸秆、黑麦秸秆、燕麦秸秆、黑小麦秸秆、稻秸秆、玉米秸秆中的一种或多种混合,所述谷类作物秸秆粉碎后经过以下预处理:将粉碎后的谷类作物秸秆放置于反应容器中,然后通过加入压力为10×105帕斯卡和温度180℃的饱和蒸汽,然后在蒸煮一段时间后减压使反应容器压力降回到大气压后取出谷类作物秸秆;然后将其与粉体A和阻燃胶黏剂按质量比10:0.4:3的比例混合搅拌均匀后倒入热压机的模具中,先预压再热压成型,预压压力范围控制在0.1-1MPa,其预压力以保持压制的板坯中的纤维不脱落为宜,过预压的板坯进行热压,温度120~140℃,压力为1.47~2.5Mpa,时间40~50秒,以使粘结剂完全固化,其中所述阻燃胶黏剂由以下方法制得:按重量份数将苯丙乳液55份、水100份、硫铝酸盐水泥30份、氢氧化镁15份、贝壳粉5份、甲基膦酸二甲酯5份、三乙烯四胺5份、硼酸8份、聚磷酸铵6份、聚二甲基硅氧烷6份、尿素6份、聚酰胺多胺环氧氯丙烷9份加入到容器中搅拌均匀后制成阻燃胶黏剂;
(6)将麻布浸泡于生漆2-12h,取出麻布包裹于稻草秸秆板上,然后刮去麻布上多余的生漆后晾干,最后用阻燃胶黏剂涂满外周,制成防霉耐腐秸秆屋顶板材(直板);切边,使产品达到要求的几何尺寸。成品堆放:出厂也可以进行深加工。
经测试,在1000℃以上的高温或明火下不燃烧,经测试达到A级,符合国标GB8624-2006《建筑 材料及制品燃烧性能分级》的相关规定;导热系数在0.11(25℃w/m.k)保温隔热性优良,;使用寿命长,成品板不吸水,耐候性、耐冻融性均满足JGJ144-2004《外墙保温工程技术规定》的相关规定。对制得的秸秆屋顶板材参照国家标准进行性能检测,检测结果见表1。
对比例1
除步骤(2)中将分离出的稻草秸秆晾干后不浸泡油,其原料含量及制备过程与实施例3一致。
对比例2
除步骤(4)中将稻草秸秆按横向排布放置于热压机的模具中外,其原料含量及制备过程与实施例3一致。
对比例3
除步骤(5)中谷类作物秸秆粉碎后不经过预处理外,其原料含量及制备过程与实施例3一致。
对比例4
除步骤(5)中所述阻燃胶黏剂由石膏100份与水65份加入到容器中搅拌均匀后制成外,其原料含量及制备过程与实施例3一致。
对比例5
除不含步骤(6)外,其原料含量及制备过程与实施例3一致。
实施例4
对实施例1-3、对比例1-5制得的防霉耐腐秸秆屋顶板材(直板)进行相关性能检测:冲击强度测试参照GB/T 1843-1996进行,该防霉耐腐秸秆屋顶板材不开裂、不发霉,自重轻,成本低可有效用于屋顶板材。
对本发明实施例1-3以及对比例1-5制得秸秆屋顶板材参照GB/T 27796-2011《建筑用秸秆植物板材》国家标准进行理化性能检测,检测结果见表1。
表1、秸秆屋顶板材的检测结果
由表1可以看出,本发明秸秆屋顶板材与对比例1、4、5相比,软化系数显著升高、说明耐水性能上升。本发明秸秆屋顶板材与对比例2、3相比,在、弯曲强度、抗冲击强度方面均显著增强,且干燥收缩较小。其中本发明实施例1在耐水性以及、弯曲强度、抗冲击强度防火性方面表现更好,为本发明最佳实施方式。本发明可根据市场需求制备出厚度在5.0~16.0cm,密度在0.15g/cm3~0.50g/cm3的轻质保温、防虫防腐、耐腐性能的秸秆屋顶板材,生产工艺简单,生产过程易于控制,生成成本低。
Claims (8)
1.一种防霉耐腐秸秆屋顶板材的制备方法,其特征在于,包括以下步骤:
(1)先按稻草秸秆和谷类秸秆按质量比3-6:7-12的比例混合进行焚烧,得到草木灰,再将草木灰与水混合形成草木灰溶液,另取稻草秸秆浸泡于草木灰溶液中一段时间,然后将稻草秸秆和草木灰溶液分离;
(2)将分离出的稻草秸秆晾干后浸泡于油中,待一段时间后取出晾干,然后将稻草秸秆编织的草绳,草绳的直径为2-6cm;
(3)将步骤1中的草木灰溶液加热蒸发掉水分,得到粉体A;
(4)将草绳按横向纵向交叉编织并通过外扎绳紧固得到网格状的稻草秸秆网,单格尺寸为3-10cm*3-10cm,将稻草秸秆网铺装于热压机的模具中;
(5)将谷类作物秸秆用粉碎机粉碎至长度 5cm 以下,然后将其与粉体A和阻燃胶黏剂按质量比10:0.1-0.4:1-3的比例混合搅拌均匀后倒入热压机的模具中,先预压再热压成型;
(6)将麻布浸泡于生漆2-12h,取出麻布包裹于稻草秸秆板上,然后刮去麻布上多余的生漆后晾干,最后用阻燃胶黏剂涂满外周,制成防霉耐腐秸秆屋顶板材。
2.根据权利要求1所述的防霉耐腐秸秆屋顶板材的制备方法,其特征在于:所述谷类作物秸秆为小麦秸秆、大麦秸秆、黑麦秸秆、燕麦秸秆、黑小麦秸秆、稻秸秆、玉米秸秆中的一种或多种混合。
3.根据权利要求1所述的防霉耐腐秸秆屋顶板材的制备方法,其特征在于:所述草木灰溶液的浓度为30-50克/升,所述稻草秸秆进行10-60分钟浸渍。
4.根据权利要求1所述的防霉耐腐秸秆屋顶板材的制备方法,其特征在于:所述谷类作物秸秆的长度为0.5-2cm。
5.根据权利要求1所述的防霉耐腐秸秆屋顶板材的制备方法,其特征在于:采用草木灰溶液在温度为40-60℃进行浸渍。
6.根据权利要求1所述的防霉耐腐秸秆屋顶板材的制备方法,其特征在于:所述谷类作物秸秆粉碎后经过以下预处理:将粉碎后的谷类作物秸秆放置于反应容器中,然后通过加入压力为10×105至15×105帕斯卡和温度180-210℃的饱和蒸汽,然后在蒸煮一段时间后减压使反应容器压力降回到大气压后取出谷类作物秸秆。
7.根据权利要求1所述的防霉耐腐秸秆屋顶板材的制备方法,其特征在于:所述阻燃胶黏剂由以下方法制得:按重量份数将苯丙乳液40-55份、水80-100份、硫铝酸盐水泥20-30份、氢氧化镁10-15份、贝壳粉3-5份、甲基膦酸二甲酯3-5份、三乙烯四胺3-5份、硼酸4-8份、聚磷酸铵4-6份、聚二甲基硅氧烷2-6份、尿素4-6份、聚酰胺多胺环氧氯丙烷5-9份加入到容器中搅拌均匀后制成阻燃胶黏剂。
8.权利要求1-7任一所述制备方法制得的防霉耐腐秸秆屋顶板材,其特征在于:所述防霉耐腐秸秆屋顶板材为直板或波形板。
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