CN110791947A - 一种用于制作纤维板的防霉抗菌木材纤维的制备方法 - Google Patents
一种用于制作纤维板的防霉抗菌木材纤维的制备方法 Download PDFInfo
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Abstract
本发明公开了一种用于制作纤维板的防霉抗菌木材纤维的制备方法,制备方法如下:1)将原材料加工成纤维状,加入到温水中进行浸泡,待浸泡结束后沥干水分,得到湿型木材纤维;2)将湿型木材纤维放置在超声波装置中进行超声波处理,将处理后的木材纤维与气相二氧化钛混合后进行搅拌,制得木材填充纤维;3)将木材填充纤维和防霉微粒混合搅拌后放入模具中,经预压处理即可制得所述木材纤维。本发明制备的木材纤维,具有很好地抗菌性,可以有效的杀灭和抑制微生物的滋生,同时在湿度较大的环境中可以长期保持干燥状态,从而避免出现发霉现象,提高了纤维板材的使用寿命,具有广泛的应用前景。
Description
技术领域
本发明属于纤维板加工技术领域,具体涉及一种用于制作纤维板的防霉抗菌木材纤维的制备方法。
背景技术
微生物广泛存在于自然界,通常霉菌源适宜繁殖生长的自然条件为温度23-38℃,相对湿度为85-100%,因此在温湿、恒湿地区的家具表面,它们繁衍迅速,并由此生出各种酶、酸和毒素的代谢产物,从而影响家具的外观与质量。目前采用防霉油漆涂刷家具表面是解决这一问题的有效措施之一,防霉油漆具有装饰和防霉作用的双重效果,固化后可以形成致密的漆膜,不吸附空气中水分与营养物,表面干燥迅速,能起到良好的防霉抑菌的效果。但是涂刷油漆的家具表面在遭受硬物碰撞后表面的漆膜容易出现破裂,从而失去防霉抑菌的作用。因此,对木材纤维进行深入研究,使得制作的纤维板在不涂刷油漆的情况下依然具有防霉抗菌的效果,是本领域的技术人员亟待解决的技术问题。
发明内容
本发明的目的是针对现有的问题,提供了一种用于制作纤维板的防霉抗菌木材纤维的制备方法。
本发明是通过以下技术方案实现的:
一种用于制作纤维板的防霉抗菌木材纤维的制备方法,具体步骤如下:
1)将原材料加工成纤维状,加入到温水中进行浸泡,待浸泡结束后沥干水分,得到湿型木材纤维;
2)将湿型木材纤维放置在功率为2000-2500W的高功率超声波装置中处理20-40min,将处理后的木材纤维与气相二氧化钛混合后在转速为500-800r/min下搅拌30-40min,制得木材填充纤维;
3)将木材填充纤维和防霉微粒混合后在转速为200-300r/min下搅拌20-30min,然后放入模具中,在50-100t的压力下保压5-10min,即可制得所述木材纤维。
优选地,一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其中步骤1)中,所述温水浸泡的温度为60-80℃,浸泡时间5-8h。
优选地,一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其中步骤2)中,所述气相二氧化钛的添加量为木材纤维重量的1-5%。
优选地,一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其中步骤3)中,所述防霉微粒的制备方法如下:
1)取硫酸钙晶须10-15份,加入到30-40份无水乙醇中,再加入硅烷偶联剂1-2份,混合均匀后加热至60-70℃,恒温反应4-6h,待反应结束后进行过滤,将产物用乙醇反复洗涤5-10次,再置于60-80℃烘箱中干燥15-20h,制得改性硫酸钙晶须;
2)取膨润土4-6份,粉碎研磨后过200目筛,放入马弗炉中加热至300-350℃,煅烧2-3h,待煅烧结束后取出膨润土,冷却至室温后浸泡在浓度为60-70%的硫酸溶液中,加热至70-90℃,在转速为80-150r/min下加热搅拌1-2h,过滤后用蒸馏水洗涤至中性,然后在100-110℃下烘干至恒重,粉碎研磨后过800目筛,制得酸化膨润土;
3)取羧甲基纤维素10-15份,加入到40-60份蒸馏水中,搅拌溶解后制得羧甲基纤维素溶液,然后加入改性硫酸钙晶须,在300-400W超声波下振荡分散40-50min,然后再加入酸化膨润土,继续振荡分散30-40min,将混合物采用高压均质机在800-1000bar压力下通过500目筛的滤膜,收集分散液,在-10--20℃下冷冻8-10h,然后在-40--50℃冷冻干燥10-15h,制得改性硫酸钙晶须/酸化膨润土复合物;
4)取淀粉5-8份,加入到20-30份蒸馏水中,加热至55-60℃,混合搅拌至淀粉完全糊化,通入氮气20-30min,除去体系中的氧气,然后再加入过硫酸钾0.2-0.4份,混合搅拌后保温3-5min,再加入丙烯酰胺/丙烯酸共聚物20-30份,浓度为5-8mol/L的氢氧化钠溶液2-3份,N,N-亚甲基双丙烯酰胺0.1-0.2份和改性硫酸钙晶须/酸化膨润土复合物,升温至70-80℃,恒温反应3-5h,将反应后的产物置于50-60℃烘箱中干燥至恒重,粉碎后过300目筛,制得防霉微粒。
优选地,一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其中步骤3)中,所述防霉微粒的添加量为木材纤维重量的20-30%。
本发明相比现有技术具有以下优点:
1.本发明制备的木材纤维,具有很好地抗菌性,可以有效的杀灭和抑制微生物的滋生,同时在湿度较大的环境中可以长期保持干燥状态,从而避免出现发霉现象,提高了纤维板材的使用寿命;首先,将木材加工成纤维状,然后在温水中进行浸泡,可以加速木材纤维的软化;其次,将沥干水分后的木材纤维进行超声波处理,在超声波作用下可以加速木材中的水分的蒸发,同时产生的局部高温有助于木材纤维细胞的重组,使得木材纤维呈现蜂窝状的细胞结构,从而提高木材纤维的孔隙率,然后将木材纤维和气相二氧化钛进行混合搅拌,在高速搅拌下可以促进气相二氧化钛渗透进木材纤维的孔道中,使得木材纤维的孔道内部填充可气相二氧化钛,从而使得木材纤维具有抗菌的作用;最后,将木材填充纤维和防霉微粒混合后进行预压处理,使得防霉微粒可以填充在木材填充纤维的接触界面上,从而提高木材纤维的致密度,而且该防霉微粒在吸水膨胀后产生的向外的挤压力可以进一步降低木材纤维间的接触缝隙,从而提高木材纤维的强度。
2.本发明制备的木材纤维,添加的防霉颗粒具有很强的吸水性,可以很好的将空气中的水分吸附并储存,从而降低空气湿度,保持空气的干燥,从而避免板材受潮上霉,而且该防霉颗粒具有可重复使用性,只需进行加热干燥,将防霉微粒中的水分烘干后即可再次使用;首先,对硫酸钙晶须进行改性处理,硅烷偶联剂与硫酸钙晶须表面发生接枝反应,降低了硫酸钙晶须的表面能和极性,从而提高硫酸钙晶须与丙烯酸的相容性,同时硫酸钙晶须作为短纤维材料可以提高防霉微粒的拉升强度,而且硫酸钙晶须具有一定的吸水性,可以促进空气中的水分子进入防霉微粒内部,从而提高防霉微粒的吸水速率;其次,将膨润土进行酸化处理,可以将膨润土中夹杂的金属氧化物和无机盐除掉,提高膨润土的纯度以及孔隙率,从而提高防霉微粒的吸水性,同时经过酸化可以增加膨润土表面的羟基和羧基的含量,从而提高膨润土的反应活性;再次,在羧甲基纤维素的粘合作用下,改性硫酸钙晶须和酸化膨润土形成复合物,然后以丙烯酸和改性硫酸钙晶须/酸化膨润土复合物为原料,过硫酸钾为引发剂,N,N-亚甲基双丙烯酰胺作为交联剂,经聚合反应形成具有良好吸水性的防霉微粒。
具体实施方式
下面结合具体实施方法对本发明做进一步的说明。
实施例1
一种用于制作纤维板的防霉抗菌木材纤维的制备方法,具体步骤如下:
1)将原材料加工成纤维状,加入到温水中进行浸泡,待浸泡结束后沥干水分,得到湿型木材纤维;
2)将湿型木材纤维放置在功率为2000W的高功率超声波装置中处理40min,将处理后的木材纤维与气相二氧化钛混合后在转速为500r/min下搅拌40min,制得木材填充纤维;
3)将木材填充纤维和防霉微粒混合后在转速为200r/min下搅拌30min,然后放入模具中,在50t的压力下保压10min,即可制得所述木材纤维。
作为优选,其中步骤1)中,所述温水浸泡的温度为60℃,浸泡时间8h。
作为优选,其中步骤2)中,所述气相二氧化钛的添加量为木材纤维重量的1%。
作为优选,其中步骤3)中,所述防霉微粒的制备方法如下:
1)取硫酸钙晶须10份,加入到30份无水乙醇中,再加入硅烷偶联剂1份,混合均匀后加热至60℃,恒温反应6h,待反应结束后进行过滤,将产物用乙醇反复洗涤5次,再置于60℃烘箱中干燥20h,制得改性硫酸钙晶须;
2)取膨润土4份,粉碎研磨后过200目筛,放入马弗炉中加热至300℃,煅烧3h,待煅烧结束后取出膨润土,冷却至室温后浸泡在浓度为60%的硫酸溶液中,加热至70℃,在转速为80r/min下加热搅拌2h,过滤后用蒸馏水洗涤至中性,然后在100℃下烘干至恒重,粉碎研磨后过800目筛,制得酸化膨润土;
3)取羧甲基纤维素10份,加入到40份蒸馏水中,搅拌溶解后制得羧甲基纤维素溶液,然后加入改性硫酸钙晶须,在300W超声波下振荡分散50min,然后再加入酸化膨润土,继续振荡分散40min,将混合物采用高压均质机在800bar压力下通过500目筛的滤膜,收集分散液,在-10℃下冷冻10h,然后在-40℃冷冻干燥15h,制得改性硫酸钙晶须/酸化膨润土复合物;
4)取淀粉5份,加入到20份蒸馏水中,加热至55℃,混合搅拌至淀粉完全糊化,通入氮气20min,除去体系中的氧气,然后再加入过硫酸钾0.2份,混合搅拌后保温5min,再加入丙烯酰胺/丙烯酸共聚物20份,浓度为5mol/L的氢氧化钠溶液2份,N,N-亚甲基双丙烯酰胺0.1份和改性硫酸钙晶须/酸化膨润土复合物,升温至70℃,恒温反应5h,将反应后的产物置于50℃烘箱中干燥至恒重,粉碎后过300目筛,制得防霉微粒。
作为优选,其中步骤3)中,所述防霉微粒的添加量为木材纤维重量的20%。
实施例2
一种用于制作纤维板的防霉抗菌木材纤维的制备方法,具体步骤如下:
1)将原材料加工成纤维状,加入到温水中进行浸泡,待浸泡结束后沥干水分,得到湿型木材纤维;
2)将湿型木材纤维放置在功率为2300W的高功率超声波装置中处理30min,将处理后的木材纤维与气相二氧化钛混合后在转速为700r/min下搅拌35min,制得木材填充纤维;
3)将木材填充纤维和防霉微粒混合后在转速为250r/min下搅拌25min,然后放入模具中,在80t的压力下保压7min,即可制得所述木材纤维。
作为优选,其中步骤1)中,所述温水浸泡的温度为70℃,浸泡时间7h。
作为优选,其中步骤2)中,所述气相二氧化钛的添加量为木材纤维重量的3%。
作为优选,其中步骤3)中,所述防霉微粒的制备方法如下:
1)取硫酸钙晶须13份,加入到35份无水乙醇中,再加入硅烷偶联剂1.5份,混合均匀后加热至65℃,恒温反应5h,待反应结束后进行过滤,将产物用乙醇反复洗涤7次,再置于70℃烘箱中干燥18h,制得改性硫酸钙晶须;
2)取膨润土5份,粉碎研磨后过200目筛,放入马弗炉中加热至320℃,煅烧2.5h,待煅烧结束后取出膨润土,冷却至室温后浸泡在浓度为65%的硫酸溶液中,加热至80℃,在转速为120r/min下加热搅拌1.5h,过滤后用蒸馏水洗涤至中性,然后在105℃下烘干至恒重,粉碎研磨后过800目筛,制得酸化膨润土;
3)取羧甲基纤维素12份,加入到50份蒸馏水中,搅拌溶解后制得羧甲基纤维素溶液,然后加入改性硫酸钙晶须,在350W超声波下振荡分散45min,然后再加入酸化膨润土,继续振荡分散35min,将混合物采用高压均质机在900bar压力下通过500目筛的滤膜,收集分散液,在-15℃下冷冻9h,然后在-45℃冷冻干燥13h,制得改性硫酸钙晶须/酸化膨润土复合物;
4)取淀粉7份,加入到25份蒸馏水中,加热至58℃,混合搅拌至淀粉完全糊化,通入氮气25min,除去体系中的氧气,然后再加入过硫酸钾0.3份,混合搅拌后保温4min,再加入丙烯酰胺/丙烯酸共聚物25份,浓度为6mol/L的氢氧化钠溶液2.5份,N,N-亚甲基双丙烯酰胺0.15份和改性硫酸钙晶须/酸化膨润土复合物,升温至75℃,恒温反应4h,将反应后的产物置于55℃烘箱中干燥至恒重,粉碎后过300目筛,制得防霉微粒。
作为优选,其中步骤3)中,所述防霉微粒的添加量为木材纤维重量的25%。
实施例3
一种用于制作纤维板的防霉抗菌木材纤维的制备方法,具体步骤如下:
1)将原材料加工成纤维状,加入到温水中进行浸泡,待浸泡结束后沥干水分,得到湿型木材纤维;
2)将湿型木材纤维放置在功率为2500W的高功率超声波装置中处理20min,将处理后的木材纤维与气相二氧化钛混合后在转速为800r/min下搅拌30min,制得木材填充纤维;
3)将木材填充纤维和防霉微粒混合后在转速为300r/min下搅拌20min,然后放入模具中,在100t的压力下保压5min,即可制得所述木材纤维。
作为优选,其中步骤1)中,所述温水浸泡的温度为80℃,浸泡时间5h。
作为优选,其中步骤2)中,所述气相二氧化钛的添加量为木材纤维重量的5%。
作为优选,其中步骤3)中,所述防霉微粒的制备方法如下:
1)取硫酸钙晶须15份,加入到40份无水乙醇中,再加入硅烷偶联剂2份,混合均匀后加热至70℃,恒温反应4h,待反应结束后进行过滤,将产物用乙醇反复洗涤0次,再置于80℃烘箱中干燥20h,制得改性硫酸钙晶须;
2)取膨润土6份,粉碎研磨后过200目筛,放入马弗炉中加热至350℃,煅烧2h,待煅烧结束后取出膨润土,冷却至室温后浸泡在浓度为70%的硫酸溶液中,加热至90℃,在转速为150r/min下加热搅拌1h,过滤后用蒸馏水洗涤至中性,然后在110℃下烘干至恒重,粉碎研磨后过800目筛,制得酸化膨润土;
3)取羧甲基纤维素15份,加入到60份蒸馏水中,搅拌溶解后制得羧甲基纤维素溶液,然后加入改性硫酸钙晶须,在400W超声波下振荡分散40min,然后再加入酸化膨润土,继续振荡分散30min,将混合物采用高压均质机在1000bar压力下通过500目筛的滤膜,收集分散液,在-20℃下冷冻8h,然后在-50℃冷冻干燥10h,制得改性硫酸钙晶须/酸化膨润土复合物;
4)取淀粉8份,加入到30份蒸馏水中,加热至60℃,混合搅拌至淀粉完全糊化,通入氮气30min,除去体系中的氧气,然后再加入过硫酸钾0.4份,混合搅拌后保温3min,再加入丙烯酰胺/丙烯酸共聚物30份,浓度为8mol/L的氢氧化钠溶液3份,N,N-亚甲基双丙烯酰胺0.2份和改性硫酸钙晶须/酸化膨润土复合物,升温至80℃,恒温反应3h,将反应后的产物置于60℃烘箱中干燥至恒重,粉碎后过300目筛,制得防霉微粒。
作为优选,其中步骤3)中,所述防霉微粒的添加量为木材纤维重量的30%。
对比例1:去除步骤2)中的超声波处理,其余与实施例1相同。
对比例2:去除防霉微粒,其余与实施例1相同。
试验例:分别采用实施例1-3和对比例1-2提供的木材纤维加工成纤维板,空白组选用普通的纤维板,纤维板的规格相同,厚度为5cm,面积大小为50cm×100cm,然后将纤维板放置在温度为25℃,湿度为90%的环境下,观察纤维板出现霉斑的时间,统计结果如下表所示:
实施例1 | 实施例2 | 实施例3 | 对比例1 | 对比例2 | 空白组 | |
霉斑出现时间d | 45 | 52 | 47 | 11 | 18 | 5 |
从上表可以看出,本发明制备的木材纤维具有很好的防霉抗菌性,可以在高湿度环境下保持长时间的干燥,从而避免出现发霉现象,提高了纤维板材的使用寿命。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何不经过创造性劳动想到的变换或替换,都应涵盖在本发明的保护范围内。
Claims (5)
1.一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其特征在于,具体步骤如下:
1)将原材料加工成纤维状,加入到温水中进行浸泡,待浸泡结束后沥干水分,得到湿型木材纤维;
2)将湿型木材纤维放置在功率为2000-2500W的高功率超声波装置中处理20-40min,将处理后的木材纤维与气相二氧化钛混合后在转速为500-800r/min下搅拌30-40min,制得木材填充纤维;
3)将木材填充纤维和防霉微粒混合后在转速为200-300r/min下搅拌20-30min,然后放入模具中,在50-100t的压力下保压5-10min,即可制得所述木材纤维。
2.如权利要求1所述的一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其特征在于,步骤1)中,所述温水浸泡的温度为60-80℃,浸泡时间5-8h。
3.如权利要求1所述的一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其特征在于,步骤2)中,所述气相二氧化钛的添加量为木材纤维重量的1-5%。
4.如权利要求1所述的一种用于制作纤维板的防霉抗菌木材纤维的制备方法,其特征在于,步骤3)中,所述防霉微粒的制备方法如下:
1)取硫酸钙晶须10-15份,加入到30-40份无水乙醇中,再加入硅烷偶联剂1-2份,混合均匀后加热至60-70℃,恒温反应4-6h,待反应结束后进行过滤,将产物用乙醇反复洗涤5-10次,再置于60-80℃烘箱中干燥15-20h,制得改性硫酸钙晶须;
2)取膨润土4-6份,粉碎研磨后过200目筛,放入马弗炉中加热至300-350℃,煅烧2-3h,待煅烧结束后取出膨润土,冷却至室温后浸泡在浓度为60-70%的硫酸溶液中,加热至70-90℃,在转速为80-150r/min下加热搅拌1-2h,过滤后用蒸馏水洗涤至中性,然后在100-110℃下烘干至恒重,粉碎研磨后过800目筛,制得酸化膨润土;
3)取羧甲基纤维素10-15份,加入到40-60份蒸馏水中,搅拌溶解后制得羧甲基纤维素溶液,然后加入改性硫酸钙晶须,在300-400W超声波下振荡分散40-50min,然后再加入酸化膨润土,继续振荡分散30-40min,将混合物采用高压均质机在800-1000bar压力下通过500目筛的滤膜,收集分散液,在-10--20℃下冷冻8-10h,然后在-40--50℃冷冻干燥10-15h,制得改性硫酸钙晶须/酸化膨润土复合物;
4)取淀粉5-8份,加入到20-30份蒸馏水中,加热至55-60℃,混合搅拌至淀粉完全糊化,通入氮气20-30min,除去体系中的氧气,然后再加入过硫酸钾0.2-0.4份,混合搅拌后保温3-5min,再加入丙烯酰胺/丙烯酸共聚物20-30份,浓度为5-8mol/L的氢氧化钠溶液2-3份,N,N-亚甲基双丙烯酰胺0.1-0.2份和改性硫酸钙晶须/酸化膨润土复合物,升温至70-80℃,恒温反应3-5h,将反应后的产物置于50-60℃烘箱中干燥至恒重,粉碎后过300目筛,制得防霉微粒。
5.如权利要求1所述的一种防霉抗菌的纤维板的制备方法,其特征在于,步骤3)中,所述防霉微粒的添加量为木材纤维重量的20-30%。
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