CN105968608A - 一种贝壳粉增强的聚氯乙烯发泡管 - Google Patents
一种贝壳粉增强的聚氯乙烯发泡管 Download PDFInfo
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Abstract
本发明公开了一种贝壳粉增强的聚氯乙烯发泡管,由以下重量份的原料制备制成:香蕉叶23‑25、粘胶纤维2.5‑3、0.4%铝锆酸酯偶联剂1‑1.5、偶氮二甲酰胺1.5‑2、碳酸氢钠5‑6、氧化锌0.2‑0.3、聚氯乙烯100‑110、二甲基二巯基乙酸异辛酸锡2‑3、碳酸铅0.5‑1、贝壳粉1.5‑1.8、膨胀珍珠岩1.2‑1.6、红土0.7‑1、碳酸钙7.8‑9、季戊四醇0.8‑1、硅烷偶联剂kh5500.1‑0.2、EVA乳液7‑9、琼脂0.5‑0.7、去离子水适量;本发明制备过程简单,操作可控,工作效率高,同时制备出的管材质量稳定性高,抗冲击、抗开裂性能好、强度高,值得推广。
Description
技术领域
本发明涉及发泡聚氯乙烯技术领域,尤其涉及一种贝壳粉增强的聚氯乙烯发泡管。
背景技术
排风设备中输送气体的管道称为风管,它把系统中的各种设备或部件连成了一个整体。风管通常用表面光滑的材料制作例如聚氯乙烯管。聚氯乙烯是五大通用塑料之一,在建材、包装等诸多行业有着广泛的用途。聚氯乙烯发泡材料由于具有轻质、隔热、隔音、高比强度、绝缘等特点更备受青睐,然而发泡材料在带来成本降低的同时,机械性能下降,极大的限制了PVC发泡材料的应用。《聚氯乙烯-蒙脱土发泡复合材料的研究》中利用季铵盐、季膦盐和磷酸酯类插层剂与硅烷偶联剂并用,制备改性蒙脱土,结果表明当蒙脱土份数在1-3phr时,压缩性能、拉伸性能、弯曲性能都有提高,热变形温度和阻燃性随着蒙脱土份数的增加而提高。但是蒙脱土加入过量,在基体中团聚而使发泡材料质量下降,并且该发泡材料的拉伸性能、强度、阻燃性、抗化学腐蚀能力均有待提高。
我国是世界香蕉主产国之一,每年可产香蕉五百百万吨供人们享用,但是伴随着产生的香蕉韧皮、香蕉叶、香蕉假茎等副产品却没有得到应用的开发应用,只有少部分被加工成绳索、麻袋、手提包及其他花式品,绝大部分被当做垃圾丢掉了,这不仅浪费了资源,还污染了环境。所以从香蕉叶中提取香蕉纤维制备成复合材料,对我国的经济发展具有重要的意义。香蕉纤维可分为香蕉茎纤维和香蕉叶纤维,香蕉茎纤维具有一般麻类纤维的优点,如强度高、伸长小、纤维粗硬、易于吸湿放湿、易于染色等特点,香蕉叶纤维具有优良的抗碱、酚、甲酸、氯仿、丙酮能力,将其添加到聚氯乙烯材料中能够减少环境污染带来巨大的经济效益,并且还能够提高聚氯乙烯的抗化学腐蚀能力,但是直接加入会降低聚氯乙烯本身的材料性能,限制其应用,必须对香蕉纤维进行改性,提高其与聚氯乙烯的界面相容性。
发明内容
本发明目的就是为了弥补已有技术的缺陷,提供一种贝壳粉增强的聚氯乙烯发泡管。
本发明是通过以下技术方案实现的:
一种贝壳粉增强的聚氯乙烯发泡管,由以下重量份的原料制备制成:香蕉叶23-25、粘胶纤维2.5-3、0.4%铝锆酸酯偶联剂1-1.5、偶氮二甲酰胺1.5-2、碳酸氢钠5-6、氧化锌0.2-0.3、聚氯乙烯100-110、二甲基二巯基乙酸异辛酸锡2-3、碳酸铅0.5-1、贝壳粉1.5-1.8、膨胀珍珠岩1.2-1.6、红土0.7-1、碳酸钙7.8-9、季戊四醇0.8-1、硅烷偶联剂kh5500.1-0.2、EVA乳液7-9、琼脂0.5-0.7、去离子水适量。
所述一种贝壳粉增强的聚氯乙烯发泡管,由以下具体步骤制备制成:
(1)将香蕉叶清洗干净晾干后采用压榨、漂白、清洗、烘干的方法提取香蕉纤维,再将香蕉纤维和粘胶纤维进行混纺并条得到混合纤维条备用;将0.4%铝锆酸酯偶联剂用75%的乙醇溶解,按照质量比2:3充分混合均匀,再将混合纤维条以浴比1:10浸渍到铝锆酸酯偶联剂溶液中,加热至溶剂挥发,烘干后备用;
(2)将贝壳粉、膨胀珍珠岩和红土先在150-200℃下加热1-1.5h,趁热加到质量浓度为10%的盐酸溶液中浸渍30-40min,取出用去离子洗涤呈中性后干燥,将硅烷偶联剂kh550和琼脂混合加入总倍量6-8倍量的无水乙醇中溶解,然后将其喷涂到上述混合物中,干燥后备用;
(3)将步骤(1)制备的改性混合纤维条短切后和EVA乳液(固含量为65%)、步骤(2)制备的产物混合,在600-800转/分下磁力搅拌10-15min,混合均匀后静置脱泡然后加到造粒机中制成颗粒,烘干后备用;
(4)将聚氯乙烯及其剩余物质加到高速混合机中混合均匀,随后加到热炼机中混合塑化,温度控制在140-150℃,再加入步骤(3)制备的产物,混合均匀后加到模腔中进行模压发泡,温度控制在185-190℃,时间为2.8-3.4min,保压压力为16-18MPa,自然冷却即可得到。
本发明的优点是:本发明利用铝锆酸酯偶联剂改性混纺的香蕉叶纤维和粘胶纤维条,使香蕉叶纤维中半纤维素和木质素成分减少,纤维素原纤的结合程度减弱,易发生解旋,提高了混合纤维的断裂伸长率和拉伸强度,再利用硅烷偶联剂kh550和琼脂处理贝壳粉等混合物,使其表面形成易吸附层和润滑性,容易和纤维条、EVA乳液形成粘结,降低混合阻力,提高其混合物阻燃、耐磨、耐火等性能,并且利用EVA乳液与聚氯乙烯优良的相容性,使纤维条在聚氯乙烯中分散性好,不团聚,达到提高聚氯乙烯发泡管阻燃、耐磨、耐腐蚀、质轻、高强等特性;本发明制备过程简单,操作可控,工作效率高,同时制备出的管材质量稳定性高,抗冲击、抗开裂性能好、强度高,值得推广。
具体实施方式
一种贝壳粉增强的聚氯乙烯发泡管,由以下重量份(公斤)的原料制备制成:香蕉叶23、粘胶纤维2.5、0.4%铝锆酸酯偶联剂1、偶氮二甲酰胺1.5、碳酸氢钠5、氧化锌0.2、聚氯乙烯100、二甲基二巯基乙酸异辛酸锡2、碳酸铅0.5-1、贝壳粉1.5、膨胀珍珠岩1.2、红土0.7、碳酸钙7.8、季戊四醇0.8、硅烷偶联剂kh550 0.1、EVA乳液7、琼脂0.5、去离子水适量。
所述一种贝壳粉增强的聚氯乙烯发泡管,由以下具体步骤制备制成:
(1)将香蕉叶清洗干净晾干后采用压榨、漂白、清洗、烘干的方法提取香蕉纤维,再将香蕉纤维和粘胶纤维进行混纺并条得到混合纤维条备用;将0.4%铝锆酸酯偶联剂用75%的乙醇溶解,按照质量比2:3充分混合均匀,再将混合纤维条以浴比1:10浸渍到铝锆酸酯偶联剂溶液中,加热至溶剂挥发,烘干后备用;
(2)将贝壳粉、膨胀珍珠岩和红土先在150℃下加热1h,趁热加到质量浓度为10%的盐酸溶液中浸渍30min,取出用去离子洗涤呈中性后干燥,将硅烷偶联剂kh550和琼脂混合加入总倍量8倍量的无水乙醇中溶解,然后将其喷涂到上述混合物中,干燥后备用;
(3)将步骤(1)制备的改性混合纤维条短切后和EVA乳液(固含量为65%)、步骤(2)制备的产物混合,在600转/分下磁力搅拌10min,混合均匀后静置脱泡然后加到造粒机中制成颗粒,烘干后备用;
(4)将聚氯乙烯及其剩余物质加到高速混合机中混合均匀,随后加到热炼机中混合塑化,温度控制在140℃,再加入步骤(3)制备的产物,混合均匀后加到模腔中进行模压发泡,温度控制在185℃,时间为2.8min,保压压力为16MPa,自然冷却即可得到。
该聚氯乙烯材料拉伸强度:62.8MPa,断裂伸长率:6.8%,弯曲强度107MPa,弯曲模量:2.98GPa,冲击强度:9.4kJ/m2,氧指数:36.7%。
Claims (2)
1.一种贝壳粉增强的聚氯乙烯发泡管,其特征在于,由以下重量份的原料制备制成:香蕉叶23-25、粘胶纤维2.5-3、0.4%铝锆酸酯偶联剂1-1.5、偶氮二甲酰胺1.5-2、碳酸氢钠5-6、氧化锌0.2-0.3、聚氯乙烯100-110、二甲基二巯基乙酸异辛酸锡2-3、碳酸铅0.5-1、贝壳粉1.5-1.8、膨胀珍珠岩1.2-1.6、红土0.7-1、碳酸钙7.8-9、季戊四醇0.8-1、硅烷偶联剂kh5500.1-0.2、EVA乳液7-9、琼脂0.5-0.7、去离子水适量。
2.根据权利要求1所述一种贝壳粉增强的聚氯乙烯发泡管,其特征在于,由以下具体步骤制备制成:
(1)将香蕉叶清洗干净晾干后采用压榨、漂白、清洗、烘干的方法提取香蕉纤维,再将香蕉纤维和粘胶纤维进行混纺并条得到混合纤维条备用;将0.4%铝锆酸酯偶联剂用75%的乙醇溶解,按照质量比2:3充分混合均匀,再将混合纤维条以浴比1:10浸渍到铝锆酸酯偶联剂溶液中,加热至溶剂挥发,烘干后备用;
(2)将贝壳粉、膨胀珍珠岩和红土先在150-200℃下加热1-1.5h,趁热加到质量浓度为10%的盐酸溶液中浸渍30-40min,取出用去离子洗涤呈中性后干燥,将硅烷偶联剂kh550和琼脂混合加入总倍量6-8倍量的无水乙醇中溶解,然后将其喷涂到上述混合物中,干燥后备用;
(3)将步骤(1)制备的改性混合纤维条短切后和EVA乳液(固含量为65%)、步骤(2)制备的产物混合,在600-800转/分下磁力搅拌10-15min,混合均匀后静置脱泡然后加到造粒机中制成颗粒,烘干后备用;
(4)将聚氯乙烯及其剩余物质加到高速混合机中混合均匀,随后加到热炼机中混合塑化,温度控制在140-150℃,再加入步骤(3)制备的产物,混合均匀后加到模腔中进行模压发泡,温度控制在185-190℃,时间为2.8-3.4min,保压压力为16-18MPa,自然冷却即可得到。
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