CN108724402A - 一种木材防腐处理工艺 - Google Patents
一种木材防腐处理工艺 Download PDFInfo
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Abstract
本发明公开了一种木材防腐处理工艺,利用不同目数的砂纸对木材表面进行打磨,彻底除去木材表面的毛刺,细纹,使木材表面光滑,改善了木材吸水的性能,有利于后期对木材表面进行防腐涂层,增大木材与涂层之间的相容性,增强涂层附着力;对木材进行超临界处理,带走部分蛋白和脂类等营养物质和易挥发有机物,有效阻止了木材的腐败;利用硅烷偶联剂对木材表面进行涂布,改善了木材与防腐涂层的结合界面,进一步增强耐腐蚀效果;最后利用防腐涂料对木材进行涂层,涂料中的改性滑石粉附着在木材表面,一方面可以增大木材表面的耐磨性,延长其使用寿命,另一方面,如果木材表面发生细小裂纹,改性滑石粉会填充进裂纹,阻止木材的进一步开裂。
Description
技术领域
本发明属于木材防腐技术领域,具体涉及一种木材防腐处理工艺。
背景技术
木材作为环境友好的生物质材料具有其他材料无法替代的优点,在国民经济建设和人民生活中发挥着重要作用。然而,很多木材却易受外界因子(包括生物、物理和化学)的破坏而影响其使用价值,尤其是生物的败坏最为严重,危害性也最大。木材的腐朽主要来自于各种生物的侵蚀,其中又以真菌造成的危害最为严重,这些真菌主要包括木材腐朽菌等。
目前,利用木材制作的工艺品层出不穷,木雕是其中使用最广的一种,但是在使用过程中存在着木雕防水、防腐性能欠佳,耐磨性有待提高的问题。
发明内容
针对上述问题,本发明旨在提供一种木材防腐处理工艺,以解决木材防水防腐,耐磨性能欠佳的问题。
本发明通过以下技术方案实现:
一种木材防腐处理工艺,包括以下步骤:
(1)将木材去皮后,利用400-600目砂纸打磨20-30min,然后利用800-1200目砂纸接着打磨20-40min,最后利用1500-2000目的砂纸打磨30-40min,使木材表面光滑,无裂纹,然后再用去离子水和丙酮依次冲洗木材表面2-3次,冷风吹干备用;
(2)将步骤(1)所得木材放入超临界设备中,压力为25-28MPa,温度为55-65℃,介质为二氧化碳,处理5-10min,然后降压至12-15 MPa,保持温度55-65℃,超临界处理5-10min,放压取出;
(3)将硅烷偶联剂用无水乙醇稀释成浓度为5-10%的溶液,对步骤(2)所得木材进行涂布,然后放入蒸汽干燥室中,使木材干燥30-40min后,取出再次涂布、干燥,重复2-3次;
(4)利用防腐涂料对步骤(3)所得木材进行涂布,然后放入通风处固化即可。
进一步的,步骤(4)所述的防腐涂料由以下重量份的原料组成:改性滑石粉10-20、聚氯乙烯树脂80-120、蓖麻油3-10,羧甲基纤维素3-5,硬脂酸1-2。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷.
进一步的,所述改性滑石粉制备方法为:
(1)将滑石粉以300-500rpm的转速搅拌5-10min,再升速至500-1000rpm,搅拌3-5min,然后放入球磨机中球磨1-2h,置于100-110℃真空干燥箱中烘焙1-3h;
(2)将10-20份壳聚糖在45-60℃下干燥6-8h后,加入100-150份质量分数为2-5%的醋酸溶液中,常温下300-500rpm转速搅拌至充分溶解,然后加入3-4份茶多酚,提速至600-800rpm,继续搅拌为均匀溶液;
(3)将步骤(1)所得滑石粉加入到步骤(2)所得溶液中,50-80Hz下超声处理30-40min,抽滤,将所得物放入真空干燥箱中干燥12-24h,取出球磨至粒径为100-500nm即可。
进一步的,所述聚氯乙烯树脂固含量为20-40%。作为发明进一步的方案:
本发明的有益效果:本发明首先利用不同目数的砂纸对木材表面进行打磨,彻底除去木材表面的毛刺,细纹,使木材表面光滑,改善了木材吸水的性能,有利于后期对木材表面进行防腐涂层,增大木材与涂层之间的相容性,增强涂层附着力;对木材进行超临界处理,带走部分蛋白和脂类等营养物质和易挥发有机物,有效阻止了木材的腐败;利用硅烷偶联剂对木材表面进行涂布,改善了木材与防腐涂层的结合界面,增强涂层附着力,进一步增强耐腐蚀效果;最后利用防腐涂料对木材进行涂层,涂料中的改性滑石粉附着在木材表面,一方面可以增大木材表面的耐磨性,延长其使用寿命,另一方面,如果木材表面发生细小裂纹,改性滑石粉会填充进裂纹,阻止木材的进一步开裂;利用壳聚糖和茶多酚协同改性滑石粉,大大增强了其耐腐蚀的效果,当滑石粉填充进裂纹时,茶多酚和壳聚糖可跟随滑石粉进一步渗透进木材内部,提高了木材的防腐蚀性能。
具体实施方式
下面用具体实施例说明本发明,但并不是对本发明的限制。
实施例1
一种木材防腐处理工艺,包括以下步骤:
(1)将木材去皮后,利用400目砂纸打磨20min,然后利用800目砂纸接着打磨20min,最后利用1500目的砂纸打磨30min,使木材表面光滑,无裂纹,然后再用去离子水和丙酮依次冲洗木材表面2次,冷风吹干备用;
(2)将步骤(1)所得木材放入超临界设备中,压力为25MPa,温度为55℃,介质为二氧化碳,处理5min,然后降压至12 MPa,保持温度55℃,超临界处理5min,放压取出;
(3)将硅烷偶联剂用无水乙醇稀释成浓度为5%的溶液,对步骤(2)所得木材进行涂布,然后放入蒸汽干燥室中,使木材干燥30min后,取出再次涂布、干燥,重复2次;
(4)利用防腐涂料对步骤(3)所得木材进行涂布,然后放入通风处固化即可。
进一步的,步骤(4)所述的防腐涂料由以下重量份的原料组成:改性滑石粉10、聚氯乙烯树脂80、蓖麻油3,羧甲基纤维素3,硬脂酸1。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷.
进一步的,所述改性滑石粉制备方法为:
(1)将滑石粉以300rpm的转速搅拌5min,再升速至500rpm,搅拌3min,然后放入球磨机中球磨1h,置于100℃真空干燥箱中烘焙1h;
(2)将10份壳聚糖在45℃下干燥6h后,加入100份质量分数为2%的醋酸溶液中,常温下300rpm转速搅拌至充分溶解,然后加入3份茶多酚,提速至600rpm,继续搅拌为均匀溶液;
(3)将步骤(1)所得滑石粉加入到步骤(2)所得溶液中,50Hz下超声处理30min,抽滤,将所得物放入真空干燥箱中干燥12h,取出球磨至粒径为100nm即可。
实施例2
一种木材防腐处理工艺,包括以下步骤:
(1)将木材去皮后,利用500目砂纸打磨25min,然后利用1000目砂纸接着打磨30min,最后利用1800目的砂纸打磨35min,使木材表面光滑,无裂纹,然后再用去离子水和丙酮依次冲洗木材表面3次,冷风吹干备用;
(2)将步骤(1)所得木材放入超临界设备中,压力为27MPa,温度为60℃,介质为二氧化碳,处理7min,然后降压至13 MPa,保持温度60℃,超临界处理8min,放压取出;
(3)将硅烷偶联剂用无水乙醇稀释成浓度为8%的溶液,对步骤(2)所得木材进行涂布,然后放入蒸汽干燥室中,使木材干燥35min后,取出再次涂布、干燥,重复3次;
(4)利用防腐涂料对步骤(3)所得木材进行涂布,然后放入通风处固化即可。
进一步的,步骤(4)所述的防腐涂料由以下重量份的原料组成:改性滑石粉15、聚氯乙烯树脂100、蓖麻油7,羧甲基纤维素4,硬脂酸2。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷.
进一步的,所述改性滑石粉制备方法为:
(1)将滑石粉以400rpm的转速搅拌7min,再升速至800rpm,搅拌4min,然后放入球磨机中球磨2h,置于105℃真空干燥箱中烘焙2h;
(2)将15份壳聚糖在50℃下干燥7h后,加入120份质量分数为4%的醋酸溶液中,常温下400rpm转速搅拌至充分溶解,然后加入4份茶多酚,提速至700rpm,继续搅拌为均匀溶液;
(3)将步骤(1)所得滑石粉加入到步骤(2)所得溶液中,70Hz下超声处理35min,抽滤,将所得物放入真空干燥箱中干燥18h,取出球磨至粒径为300nm即可。
实施例3
一种木材防腐处理工艺,包括以下步骤:
(1)将木材去皮后,利用600目砂纸打磨30min,然后利用1200目砂纸接着打磨40min,最后利用2000目的砂纸打磨40min,使木材表面光滑,无裂纹,然后再用去离子水和丙酮依次冲洗木材表面3次,冷风吹干备用;
(2)将步骤(1)所得木材放入超临界设备中,压力为28MPa,温度为65℃,介质为二氧化碳,处理10min,然后降压至15 MPa,保持温度65℃,超临界处理10min,放压取出;
(3)将硅烷偶联剂用无水乙醇稀释成浓度为10%的溶液,对步骤(2)所得木材进行涂布,然后放入蒸汽干燥室中,使木材干燥40min后,取出再次涂布、干燥,重复3次;
(4)利用防腐涂料对步骤(3)所得木材进行涂布,然后放入通风处固化即可。
进一步的,步骤(4)所述的防腐涂料由以下重量份的原料组成:改性滑石粉20、聚氯乙烯树脂120、蓖麻油10,羧甲基纤维素5,硬脂酸2。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷.
进一步的,所述改性滑石粉制备方法为:
(1)将滑石粉以500rpm的转速搅拌10min,再升速至1000rpm,搅拌5min,然后放入球磨机中球磨2h,置于110℃真空干燥箱中烘焙3h;
(2)将20份壳聚糖在60℃下干燥8h后,加入150份质量分数为5%的醋酸溶液中,常温下500rpm转速搅拌至充分溶解,然后加入4份茶多酚,提速至800rpm,继续搅拌为均匀溶液;
(3)将步骤(1)所得滑石粉加入到步骤(2)所得溶液中,80Hz下超声处理40min,抽滤,将所得物放入真空干燥箱中干燥24h,取出球磨至粒径为500nm即可。
对比实施例1
本对比实施例相比于实施例1,省略了用不同目数砂纸打磨的工序,除此之外的方法步骤均相同。
对比实施例2
本对比实施例相比于实施例1,省略了木材的超临界处理,除此之外的方法步骤均相同。
对比实施例3
本对比实施例相比于实施例1,省略了硅烷偶联剂对木材表面的处理,除此之外的方法步骤均相同。
对比实施例4
本对比实施例相比于实施例1,用滑石粉代替改性滑石粉,除此之外的方法步骤均相同。
实验:
防腐性能测试:本实验采用为实验对象,将各组所得样品裁取相同体积分别放入试验箱中,控制试验箱中的温度为28℃,常压,相对湿度为100%,在试验箱中接种有50%采绒革盖菌和50%密粘褶菌,统计被这两种木腐菌感染面积为5%时所经历的总时长,用防腐时长表示,来衡量防腐性能;
涂层附着力测试:涂层附着力测试按照GB/9286-1988《划格法》进行。
硬度测试:按铅笔硬度GB/T6379-1996试验。
测试结果如表1所示:
表1
由表1可以看出,经过本发明所提供的处理工艺进行处理,木材的耐腐蚀性大大提高,同时木材表面的耐磨性能也得到大幅度加强。
Claims (5)
1.一种木材防腐处理工艺,其特征在于,包括以下步骤:
(1)将木材去皮后,利用400-600目砂纸打磨20-30min,然后利用800-1200目砂纸接着打磨20-40min,最后利用1500-2000目的砂纸打磨30-40min,使木材表面光滑,无裂纹,然后再用去离子水和丙酮依次冲洗木材表面2-3次,冷风吹干备用;
(2)将步骤(1)所得木材放入超临界设备中,压力为25-28MPa,温度为55-65℃,介质为二氧化碳,处理5-10min,然后降压至12-15 MPa,保持温度55-65℃,超临界处理5-10min,放压取出;
(3)将硅烷偶联剂用无水乙醇稀释成浓度为5-10%的溶液,对步骤(2)所得木材进行涂布,然后放入蒸汽干燥室中,使木材干燥30-40min后,取出再次涂布、干燥,重复2-3次;
(4)利用防腐涂料对步骤(3)所得木材进行涂布,然后放入通风处固化即可。
2.根据权利要求1所述的一种木材防腐处理工艺,其特征在于,步骤(4)所述的防腐涂料由以下重量份的原料组成:改性滑石粉10-20、聚氯乙烯树脂80-120、蓖麻油3-10,羧甲基纤维素3-5,硬脂酸1-2。
3.根据权利要求1所述的一种木材防腐处理工艺,其特征在于,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷。
4.根据权利要求2所述的防腐涂料,其特征在于,所述改性滑石粉制备方法为:
(1)将滑石粉以300-500rpm的转速搅拌5-10min,再升速至500-1000rpm,搅拌3-5min,然后放入球磨机中球磨1-2h,置于100-110℃真空干燥箱中烘焙1-3h;
(2)将10-20份壳聚糖在45-60℃下干燥6-8h后,加入100-150份质量分数为2-5%的醋酸溶液中,常温下300-500rpm转速搅拌至充分溶解,然后加入3-4份茶多酚,提速至600-800rpm,继续搅拌为均匀溶液;
(3)将步骤(1)所得滑石粉加入到步骤(2)所得溶液中,50-80Hz下超声处理30-40min,抽滤,将所得物放入真空干燥箱中干燥12-24h,取出球磨至粒径为100-500nm即可。
5.根据权利要求2所述的防腐涂料,其特征在于,所述聚氯乙烯树脂固含量为20-40%。
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