CN112062990A - 一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺 - Google Patents
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺 Download PDFInfo
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Abstract
本发明涉及废弃医用口罩回收技术领域,为实现废弃医用口罩的合理利用,公开一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,将木质素磺酸盐和废弃医用口罩分别烘干、破碎、混合得到回收混合原料;然后将回收混合原料经热压熔融冷却制得木塑复合薄膜。本发明提供了一种利用木质素磺酸盐处理废弃医用口罩的方法,将废弃医用口罩转化成具有高吸水性增强木塑复合薄膜材料,为木质素磺酸盐使用以及废旧医用口罩回收的提供了新工艺,对高分子材料的商业回收再利用具有重要意义。
Description
技术领域
本发明涉及废弃医用口罩回收技术领域,具体涉及一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺。
背景技术
医用口罩多采用一层或者多层非织造布复合制作而成,主要生产工艺包括熔喷、纺粘、热风或者针刺等,具有抵抗液体、过滤颗粒物和细菌等效用,是一种医疗防护用纺织品。当前医用口罩用量巨大,也造成大量废弃医用口罩的产生,因此面临回收处理的大问题。目前针对医用口罩的处理主要是利用粉碎机粉碎,避免医用口罩的二次不法利用。但是由此产生的大量的碎片废弃物也对环境产生十分严重的污染。中国专利CN111516183A公开了一种废弃医用口罩的回收方法,将废弃口罩粉碎后与偶联剂、增强剂、抗氧剂、颜料、抗菌剂等组份混合密炼、造粒制成聚丙烯复合材料,能够解决废弃口罩造成的环境污染问题,还能使制得的聚丙烯复合材料具有较好的力学性能、抗菌性能等,为废弃口罩回收利用提供了一种方法,但是该回收方法的制备工序较为复杂。
发明内容
为实现废弃医用口罩的合理利用,本发明的目的在于提供一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,将废弃医用口罩转化为木塑复合材料,具有吸水性能和断裂强度,为废弃医用口罩的回收利用提供了一种新的技术路径和思路。
本发明提供如下的技术方案:
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将木质素磺酸盐和废弃医用口罩分别烘干、破碎、混合得到回收混合原料;
(2)将回收混合原料经热压熔融冷却制得木塑复合薄膜。
作为本发明方法的优选,所述废弃医用口罩的材质为PP。
作为本发明方法的优选,所述木质素磺酸至少为木质素磺酸钠、木质素磺酸钙、木质素磺酸钾、木质素磺酸钡、木质素磺酸镁中的一种。
作为本发明方法的优选,步骤(1)中破碎后的木质素磺酸盐的粒径为20~40μm。
作为本发明方法的优选,木质素磺酸盐与废弃医用口罩的质量比为1:8~15。
作为本发明方法的优选,步骤(1)中还包括向回收混合原料中加入三羟甲基丙烷、三聚磷酸钠、六偏磷酸钠、羧甲基纤维素、聚乙烯醇、聚乙二醇200、聚乙二醇600中的一种或多种,其中加入质量≤木质素磺酸盐的100%。
作为本发明方法的优选,步骤(1)中还包括向回收混合原料中加入马来酸酐接枝聚丙烯,加入质量≤木质素磺酸盐的20%。
作为本发明方法的优选,步骤(1)中还包括向回收混合原料中加入抗氧化剂1010或抗氧化剂168,加入质量≤木质素磺酸盐的2%。
作为本发明方法的优选,步骤(1)中还包括相回收混合原料中加入炭黑,加入质量≤木质素磺酸盐的20%。
作为本发明方法的优选,步骤(2)中热压熔融的条件为:流道温度200~210℃,冷轴温度25~27℃,压力1.6~1.8MPa,保压时间10~15min。
木质素磺酸盐作为木质素磺化改性产物,具有磺酸、酚羟基等亲水基团,通常为黄褐色固体粉末或黏稠浆液,具有良好的分散性、耐热稳定性和高温分散性,助磨效果良好,一般被用作阴离子表面活性剂。木质素磺酸盐的产量巨大,浙江省每年可以产生超过600万吨木质素磺酸盐,但其废弃量也同样不容小觑,而目前针对木质素磺酸盐的回收处理大多集中在一些低价值领域。发明人经过研究,将回收的木质素磺酸盐与废弃医用口罩结合起来,将废弃医用口罩转化成具有亲水性的材料,并兼顾较强的拉伸断裂强度,适用于生产保水地膜、树膜产品等行业。
本发明的有益效果如下:
本发明提供了一种利用木质素磺酸盐处理废弃医用口罩的方法,将废弃医用口罩转化成具有高吸水性增强木塑复合薄膜材料,为木质素磺酸盐使用以及废旧医用口罩回收的提供了新工艺,对高分子材料的商业回收再利用具有重要意义。
具体实施方式
下面就本发明的具体实施方式作进一步说明。
如无特别说明,本发明中所采用的原料均可从市场上购得或是本领域常用的,如无特别说明,下述实施例中的方法均为本领域的常规方法。
实施例1
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钠烘干后破碎至平均粒径40μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钠与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入六偏磷酸钠、羧甲基纤维素,六偏磷酸钠、羧甲基纤维素与木质素磺酸钠的质量比为0.5:0.5:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例2
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸镁烘干后破至平均粒径40μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸镁与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入聚乙烯醇、聚乙二醇600和马来酸酐接枝聚丙烯,聚乙烯醇、聚乙二醇600和马来酸酐接枝聚丙烯与木质素磺酸镁的质量比为0.2:0.4:0.1:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例3
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钾烘干后破碎至平均粒径40μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钾与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入三聚磷酸钠、聚乙二醇600,三聚磷酸钠、聚乙二醇600与木质素磺酸钾的质量比为0.5:0.4:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例4
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钙烘干后破碎至平均粒径40μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钙与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入聚乙二醇600、马来酸酐接枝聚丙烯、抗氧化剂1010和炭黑,聚乙二醇600、马来酸酐接枝聚丙烯、抗氧化剂1010和炭黑与木质素磺酸钙的质量比为0.1:0.1:0.01:0.1:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例5
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钠烘干后破碎至平均粒径20μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钠与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入马来酸酐接枝聚丙烯和抗氧化剂1010,马来酸酐接枝聚丙烯和抗氧化剂1010与木质素磺酸钠的质量比为0.1:0.01:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例6
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钡烘干后破碎至平均粒径40μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钡与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入羧甲基纤维素、马来酸酐接枝聚丙烯、抗氧化剂1010,羧甲基纤维素、马来酸酐接枝聚丙烯、抗氧化剂1010,与木质素磺酸钡的质量比为0.2:0.1:0.01:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例7
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸镁烘干后破碎至平均粒径20μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸镁与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入马来酸酐接枝聚丙烯、抗氧化剂1010和炭黑马来酸酐接枝聚丙烯、抗氧化剂1010和炭黑与木质素磺酸镁的质量比为0.1:0.01:0.1:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例8
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钠烘干后破碎至平均粒径40μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钠与废弃医用口罩按照质量比1:15混合得到回收混合原料;
(2)向回收混合原料中加入抗氧化剂1010和炭黑,抗氧化剂1010和炭黑与木质素磺酸钠的质量比为0.01:0.2:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度200℃,冷轴温度25℃,压力1.6MPa,保压时间10min。
实施例9
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钠烘干后破碎至30μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钠与废弃医用口罩按照质量比1:8混合得到回收混合原料;
(2)向回收混合原料中加入三羟甲基丙烷和抗氧化剂168,三羟甲基丙烷和抗氧化剂168与木质素磺酸钠的质量比为0.7:0.02:1;
(3)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度205℃,冷轴温度27℃,压力1.8MPa,保压时间10min。
实施例10
一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,包括以下步骤:
(1)将回收的木质素磺酸钠烘干后破碎至30μm,将回收的PP材质的废弃医用口罩杀菌消毒、干燥,然后剪切破碎,然后木质素磺酸钠与废弃医用口罩按照质量比1:10混合得到回收混合原料;
(2)将回收混合原料经热压熔融冷却制得木塑复合薄膜,流道温度210℃,冷轴温度27℃,压力1.7MPa,保压时间15min。
对比例
与实施例4相比,仅适用废弃医用口罩。
性能测试
1、吸水性能测试
取尺寸相同的各实施例和对比例所制备的薄膜,称量干重m1(g),然后置于蒸馏水中浸没5min,取出后自然沥水,至无水滴下,称湿重m2(g),按下式计算薄膜的含水百分比A(%):A(%)=(m2-m1)/m1×100%
结果如表1所示。
表1薄膜的吸水能力
项目 | m1/g | m2/g | A/% |
实施例1 | 0.102 | 1.989 | 1850.00 |
实施例2 | 0.102 | 2.001 | 1861.76 |
实施例3 | 0.105 | 2.05 | 1852.38 |
实施例4 | 0.113 | 2.25 | 1891.15 |
实施例5 | 0.111 | 2.089 | 1781.98 |
实施例6 | 0.121 | 2.311 | 1809.92 |
实施例7 | 0.143 | 2.625 | 1735.66 |
实施例8 | 0.110 | 2.311 | 2000.91 |
实施例9 | 0.112 | 2.201 | 1865.19 |
实施例10 | 0.109 | 2.062 | 1791.74 |
对比例 | 0.108 | 0.115 | 6.48 |
从上表中可以看出,本申请制备的木塑复合薄膜具有较强的吸水性能。
2、拉伸断裂强度测试
依照GB/T24218.3-2010表准测试各实施例和对比例所的薄膜的拉伸断裂强度和断裂伸长率,结果表2所示。
表2薄膜拉伸断裂强力和断裂伸长率结果
项目 | 断裂强力/N | 断裂伸长率/% |
实施例1 | 19 | 30 |
实施例2 | 19 | 35 |
实施例3 | 18 | 30 |
实施例4 | 21 | 41 |
实施例5 | 23 | 44 |
实施例6 | 25 | 50 |
实施例7 | 18 | 25 |
实施例8 | 21 | 23 |
实施例9 | 20 | 28 |
实施例10 | 18 | 20 |
对比例 | 15 | 17 |
从上表中可以看出,本发明制备木塑复合薄膜与不添加木质素磺酸盐相比,具有更高的断裂强力和断裂伸长率。
Claims (10)
1.一种利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,包括以下步骤:
(1)将木质素磺酸盐和废弃医用口罩分别烘干、破碎、混合得到回收混合原料;
(2)将回收混合原料经热压熔融冷却制得木塑复合薄膜。
2.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,所述废弃医用口罩的材质为PP。
3.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,所述木质素磺酸至少为木质素磺酸钠、木质素磺酸钙、木质素磺酸钾、木质素磺酸钡、木质素磺酸镁中的一种。
4.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,步骤(1)中破碎后的木质素磺酸盐的粒径为20~40µm。
5.根据权利要求1至4任一所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,木质素磺酸盐与废弃医用口罩的质量比为1:8~15。
6.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,步骤(1)中还包括向回收混合原料中加入三羟甲基丙烷、三聚磷酸钠、六偏磷酸钠、羧甲基纤维素、聚乙烯醇、聚乙二醇200、聚乙二醇600中的一种或多种,加入的总质量≤木质素磺酸盐的100%。
7.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,步骤(1)中还包括向回收混合原料中加入马来酸酐接枝聚丙烯,加入质量≤木质素磺酸盐的20%。
8.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,步骤(1)中还包括向回收混合原料中加入抗氧化剂1010或抗氧化剂168,加入质量≤木质素磺酸盐的2%。
9.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,步骤(1)中还包括向回收混合原料中加入炭黑,加入质量≤木质素磺酸盐的20%。
10.根据权利要求1所述的利用废弃医用口罩制备高吸水性木塑复合薄膜的工艺,其特征在于,步骤(2)中热压熔融的条件为:流道温度200~210℃,冷轴温度25~27℃,压力1.6~1.8MPa,保压时间10~15min。
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Application publication date: 20201211 |
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RJ01 | Rejection of invention patent application after publication |