CN108774366A - 一种pvc复合人造革的制备方法 - Google Patents
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Abstract
本发明公开了一种PVC复合人造革的制备方法,首先利用壳聚糖改性碳纳米管,在碳纳米管表面形成壳聚糖外壳,再利用芳纶纤维接枝在壳聚糖外壳上,形成壳聚糖包裹碳纳米管,又负载芳纶纤维的碳纳米管‑壳聚糖‑芳纶纤维复合材料,应用到PVC材料中,不仅赋予复合材料优异的抗静电性能,同时大大提高了复合人造革的机械性能,拓宽人造革的应用领域。
Description
技术领域
本发明属于PVC材料技术领域,具体涉及一种PVC复合人造革的制备方法。
背景技术
塑料包装材料在包装行业中具有举足轻重的作用,如果要达到包装的保护产品、方便运输、促进销售的作用,必须做到重视塑料的作用。常用的塑料可以分为通用塑料和功能塑料。PVC 曾是世界上产量最大的通用塑料,目前来看,其主要应用领域为建材行业中的管材和型材方面。PVC 塑料一方面具有绝缘性能好、强度高、价格低廉的优点,但另一方面在摩擦、剥离过程中由于具有磁化率高、电绝缘性好的特性,导致容易产生静电荷。在PVC用于人造革生产时,需要人造革具有良好的抗静电性。
发明内容
针对上述问题,本发明旨在提供一种具有良好的抗静电性,同时机械性能突出的PVC复合人造革的制备方法。
本发明通过以下技术方案实现:
一种PVC复合人造革的制备方法,包括以下步骤:
(1)将以重量份计的10-15份碳纳米管加入到其体积5-10倍的丙酮中,浸泡15-20min,然后过滤,使用清水洗涤、烘干,然后加入到容器中,在无溶剂条件下利用200-300rpm的磁力搅拌,边搅拌边喷洒2-3份硅烷偶联剂溶液,碳纳米管表面润湿后,加入10-15份壳聚糖,升速至300-400rpm继续搅拌10-20min,然后静置10-20h,放入真空干燥箱中50-70℃烘干,粉碎至粒径为100-500nm;
(2)将1-2份氢化钠加入其质量100-200倍的二甲基亚砜溶液,缓慢升至50-60℃,200-300rpm转速下搅拌1-2h后降温至25-28℃,缓慢加入4-8份芳纶纤维,保温搅拌30-40h,加入10-15份环氧氯丙烷,再继续搅拌30-40h;
(3)将步骤(1)所得物加入到步骤(2)所得溶液中,超声分散1-2h,然后升温至70-78℃,200-500rpm下搅拌反应40-45h,反应结束后,真空抽滤,所得物用乙醇、丙酮交替洗涤2-3次,产物放入冻干机中,-30~-40℃下干燥3-5h,得到碳纳米管-壳聚糖-芳纶纤维复合材料;
(4)将步骤(3)所得物与50-80份PVC放入混合机,1000-1200rpm下混合20-30min,然后加入5-8份钙锌复合稳定剂和3-5份聚乙烯蜡,得到混合料;
(5)将初混料放入密炼机中,密炼3.5~4min,将物料送至炼塑机;
(6)炼塑时在初炼塑机上打包翻卷几次送至终炼塑机,炼塑至料卷发糯、半透明无亮光时,切成直径为中10~15cm的料卷或开成料片,用传送带送至压延机,得到压延浆料;
(7)压延浆料贴合经预热开幅处理的布基,平整地引入中、下辊间,把经预热的面层膜在贴合部分和上述制得的半成品革再贴合后进入烘箱塑化,经冷却定型后,得到PVC复合人造革。
步骤(1)中所述的硅烷偶联剂溶液为15-20%的硅烷偶联剂KH-550的乙醇溶液。
所述炼塑工艺条件为初炼辊温180℃,辊距5~7mm,终炼辊温185℃,辊距3~5mm。
本发明的有益效果:本发明首先利用壳聚糖改性碳纳米管,在碳纳米管表面形成壳聚糖外壳,再利用芳纶纤维接枝在壳聚糖外壳上,形成壳聚糖包裹碳纳米管,又负载芳纶纤维的碳纳米管-壳聚糖-芳纶纤维复合材料,应用到PVC材料中,不仅赋予复合材料优异的抗静电性能,同时大大提高了复合材料的机械性能,拓宽其应用领域,更符合特定的市场要求;利用壳聚糖改性碳纳米管,一方面壳聚糖外壳可以提供大量的-NH2基团,可以和环氧化芳纶纤维的环氧基团反应,作为碳纳米管和芳纶纤维的桥梁,使其结合而均匀分布,另一方面,壳聚糖的加入,增大了碳纳米管自身的分散性,避免其团聚、发生缠绕等;其次,芳纶纤维分子内部的刚性结构,与其他合成纤维相比,具有耐高温、耐酸、耐碱等化学侵蚀的优点、高强度、高模量、耐热性极强的特点,在壳聚糖表面接枝芳纶纤维,改善了碳纳米管的团聚现象,同时也优化了PVC材料的各项性能。
本申请对于人造革的加工工艺也进行了一定的调整,使得材料的抗静电性能及力学性能进一步提升,使其能够在电学设备间中作为地板革等使用,增加了人造革的使用范围。
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PVC复合人造革的制备方法,包括以下步骤:
(1)将以重量份计的12份碳纳米管加入到其体积8倍的丙酮中,浸泡18min,然后过滤,使用清水洗涤、烘干,然后加入到容器中,在无溶剂条件下利用260rpm的磁力搅拌,边搅拌边喷洒2.2份硅烷偶联剂溶液,碳纳米管表面润湿后,加入12份壳聚糖,升速至360rpm继续搅拌15min,然后静置15h,放入真空干燥箱中70℃烘干,粉碎至粒径为350-500nm;
(2)将1.6份氢化钠加入其质量150倍的二甲基亚砜溶液,缓慢升至55℃,240rpm转速下搅拌1.5h后降温至26℃,缓慢加入5份芳纶纤维,保温搅拌36h,加入13份环氧氯丙烷,再继续搅拌36h;
(3)将步骤(1)所得物加入到步骤(2)所得溶液中,超声分散1-2h,然后升温至72℃,360rpm下搅拌反应42h,反应结束后,真空抽滤,所得物用乙醇、丙酮交替洗涤2次,产物放入冻干机中,-35℃下干燥3.6h,得到碳纳米管-壳聚糖-芳纶纤维复合材料;
(4)将步骤(3)所得物与75份PVC放入混合机,1000-1200rpm下混合处理20-30min,然后加入6份钙锌复合稳定剂和3.2份聚乙烯蜡,得到混合料;
(5)将初混料放入密炼机中,密炼3.5~4min,将物料送至炼塑机;
(6)炼塑时在初炼塑机上打包翻卷几次送至终炼塑机,炼塑至料卷发糯、半透明无亮光时,切成直径为中10~15cm的料卷或开成料片,用传送带送至压延机,得到压延浆料;
(7)压延浆料贴合经预热开幅处理的布基,平整地引入中、下辊间,把经预热的面层膜在贴合部分和上述制得的半成品革再贴合后进入烘箱塑化,经冷却定型后,得到PVC复合人造革。
步骤(1)中所述的硅烷偶联剂溶液为18%的硅烷偶联剂KH-550的乙醇溶液。
所述炼塑工艺条件为初炼辊温180℃,辊距5~7mm,终炼辊温185℃,辊距3~5mm。
实施例2
一种PVC复合人造革的制备方法,包括以下步骤:
(1)将以重量份计的15份碳纳米管加入到其体积7倍的丙酮中,浸泡20min,然后过滤,使用清水洗涤、烘干,然后加入到容器中,在无溶剂条件下利用200-300rpm的磁力搅拌,边搅拌边喷洒3份硅烷偶联剂溶液,碳纳米管表面润湿后,加入13份壳聚糖,升速至380rpm继续搅拌14min,然后静置18h,放入真空干燥箱中65℃烘干,粉碎至粒径为400-450nm;
(2)将1.6份氢化钠加入其质量180倍的二甲基亚砜溶液,缓慢升至58℃,260-280rpm转速下搅拌1.3h后降温至26℃,缓慢加入5.6份芳纶纤维,保温搅拌35h,加入13份环氧氯丙烷,再继续搅拌35h;
(3)将步骤(1)所得物加入到步骤(2)所得溶液中,超声分散1-2h,然后升温至73℃,360rpm下搅拌反应42h,反应结束后,真空抽滤,所得物用乙醇、丙酮交替洗涤3次,产物放入冻干机中,-35℃下干燥3h,得到碳纳米管-壳聚糖-芳纶纤维复合材料;
(4)将步骤(3)所得物与75份PVC放入混合机,1000-1200rpm下混合20-30min,然后加入6份钙锌复合稳定剂和3份聚乙烯蜡,得到混合料;
(5)将初混料放入密炼机中,密炼3.8min,将物料送至炼塑机;
(6)炼塑时在初炼塑机上打包翻卷几次送至终炼塑机,炼塑至料卷发糯、半透明无亮光时,切成直径为中10~15cm的料卷或开成料片,用传送带送至压延机,得到压延浆料;
(7)压延浆料贴合经预热开幅处理的布基,平整地引入中、下辊间,把经预热的面层膜在贴合部分和上述制得的半成品革再贴合后进入烘箱塑化,经冷却定型后,得到PVC复合人造革。
步骤(1)中所述的硅烷偶联剂溶液为16%的硅烷偶联剂KH-550的乙醇溶液。
所述炼塑工艺条件为初炼辊温180℃,辊距5~7mm,终炼辊温185℃,辊距3~5mm。
对比实施例1
本对比实施例相比于实施例1,省略了壳聚糖的加入,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,省略了碳纳米管的加入,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,省略了芳纶纤维的加入,除此之外的方法步骤均相同。
实验:
抗静电性测试:采用数字式电阻率测定仪对各实施例和对比实施例制备所得样品的表面电阻率进行测量,测试电压为500V ,环境温度为23℃。表面电阻率越低,抗静电效果越好,低于1012Ω/sq就就有抗静电的作用。
力学性能测试:按照 GB/T1040.4-2006标准测试复合材料的拉伸强度,拉伸速度为2mm/min。按照GB/T9341-2008标准测试复合材料的弯曲强度,加载速度为2mm/min。按照GB/T1043.1-2008标准测试复合材料的冲击强度。测试在室温条件下进行,实验结果为6次平均值。
测试结果如表1所示:
表1
由表1可以看出,经过碳纳米管-壳聚糖-芳纶纤维的复合改性,大大提高了复合材料的各项力学性能,同时也具有优良的抗静电的效果。
Claims (3)
1.一种PVC复合人造革的制备方法,其特征在于,包括以下步骤:
(1)将以重量份计的10-15份碳纳米管加入到其体积5-10倍的丙酮中,浸泡15-20min,然后过滤,使用清水洗涤、烘干,然后加入到容器中,在无溶剂条件下利用200-300rpm的磁力搅拌,边搅拌边喷洒2-3份硅烷偶联剂溶液,碳纳米管表面润湿后,加入10-15份壳聚糖,升速至300-400rpm继续搅拌10-20min,然后静置10-20h,放入真空干燥箱中50-70℃烘干,粉碎至粒径为100-500nm;
(2)将1-2份氢化钠加入其质量100-200倍的二甲基亚砜溶液,缓慢升至50-60℃,200-300rpm转速下搅拌1-2h后降温至25-28℃,缓慢加入4-8份芳纶纤维,保温搅拌30-40h,加入10-15份环氧氯丙烷,再继续搅拌30-40h;
(3)将步骤(1)所得物加入到步骤(2)所得溶液中,超声分散1-2h,然后升温至70-78℃,200-500rpm下搅拌反应40-45h,反应结束后,真空抽滤,所得物用乙醇、丙酮交替洗涤2-3次,产物放入冻干机中,-30~-40℃下干燥3-5h,得到碳纳米管-壳聚糖-芳纶纤维复合材料;
(4)将步骤(3)所得物与50-80份PVC放入混合机,1000-1200rpm下混合20-30min,然后加入5-8份钙锌复合稳定剂和3-5份聚乙烯蜡,得到混合料;
(5)将初混料放入密炼机中,密炼3.5~4min,将物料送至炼塑机;
(6)炼塑时在初炼塑机上打包翻卷几次送至终炼塑机,炼塑至料卷发糯、半透明无亮光时,切成直径为中10~15cm的料卷或开成料片,用传送带送至压延机,得到压延浆料;
(7)压延浆料贴合经预热开幅处理的布基,平整地引入中、下辊间,把经预热的面层膜在贴合部分和上述制得的半成品革再贴合后进入烘箱塑化,经冷却定型后,得到PVC复合人造革。
2.根据权利要求1所述的一种PVC复合人造革的制备方法,其特征在于,步骤(1)中所述的硅烷偶联剂溶液为15-20%的硅烷偶联剂KH-550的乙醇溶液。
3.根据权利要求1所述的一种PVC复合人造革的制备方法,其特征在于,所述炼塑工艺条件为初炼辊温180℃,辊距5~7mm,终炼辊温185℃,辊距3~5mm。
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