CN114213744B - 一种抗静电包装材料 - Google Patents
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/011—Nanostructured additives
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
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Abstract
本发明涉及一种包装材料,具体涉及一种抗静电塑料袋。所述材料包括如下重量份数的组成:线性低密度聚乙烯35‑70份、填充料8‑24份、抗静电剂5‑18份、增塑剂3‑10份、植物纤维3‑8份、抗氧化剂1‑5份:所述抗静电剂为聚乙烯醇改性多壁碳纳米管,通过聚乙烯醇对多壁碳纳米管进行接枝改性,使碳纳米管表面接枝聚乙烯醇聚合物。本发明的有益效果在于:采用聚乙烯醇接枝改性的多壁碳纳米管抗静电填料可以与线性低密度聚乙烯高分子材料较好的相容,利用高分子材料间的分子链互穿,实现了导电填料的稳固嵌入,提升了包装材料的力学性能。
Description
技术领域
本发明属于包装薄膜技术领域,具体涉及一种防静电塑料薄膜。
背景技术
塑料是以合成或天然的高分子树脂为主要材料,添加各种助剂后,在一定的温度和压力下具有延展性,冷却后可以固定其形状的一类材料。塑料包装是包装业中四大材料之一;纸及纸版占30%,塑料占25%,金属占25%,玻璃占15%。塑料包装袋是一种以塑料为原材料,用于生产生活中各种用品的包装袋,广泛用于日常生活和工业生产中。塑料具有较好的电绝缘性能,被应用在电子、危险品、电雷管等产品包装的时候,塑料包装内产生的摩擦静电是及其危险的,残生静电造成局部高温,从而使塑料包装袋融化,甚至燃烧,造成物质上的损失的同时,可能会造成人员的伤亡。因此,对塑料袋的抗静电问题引起了人们的高度重视。
高分子材料抗静电方法的原理,主要是通过提高高分子材料的表面电导率或体积电导率,使高聚物材料迅速放电来防止静电的积聚。改善高分子材料抗静电性能的方法主要有以下三种:添加抗静电剂、与导电填料复合、与结构型导电高聚物共混。其中添加导电填料主要是利用导电填料的导电性能将产生的电荷移除,具有加工方便,防静电效果好的特征,是应用较为普遍的一种方式。导电填料是能赋予导电性能的一类物质,其种类繁多。按其性能来分,主要可以分为碳系、金属系及其它;然而这些导电物质多为无机材料,对有机高分子的相容性较差,添加量过大会造成材料力学性能降低,影响使用性能。
发明内容
为解决现有技术的不足,本发明提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯35-70份、填充料8-24份、抗静电剂5-18份、增塑剂3-10份、植物纤维3-8份、抗氧化剂1-5份:
所述抗静电剂为聚乙烯醇改性多壁碳纳米管,通过聚乙烯醇对多壁碳纳米管进行接枝改性,使碳纳米管表面接枝聚乙烯醇聚合物,利用聚乙烯醇聚合物与线性低密度聚乙烯的共混,实现高分子链间的互穿,进而使碳纳米管牢牢附着在高分子链上,进而提高了其力学性能。所述抗静电剂的制备方法主要包括如下步骤:(1)将一定量的多壁碳纳米管置于硫酸和硝酸的混酸中,进行超声振荡反应3-5h,然后用去离子水稀释后过滤,洗涤得羧基功能化得碳纳米管;(2)将羧基功能化的碳纳米管与氯化亚砜反应得到酰氯功能化的碳纳米管;(3)将酰氯功能化的碳纳米管与聚乙烯醇在浓硫酸催化下与羟基发生接枝反应,得聚乙烯醇功能化的碳纳米管抗静电剂。具体反应过程如下:
所述填充料为改性纳米二氧化硅,具体改性方法是将纳米二氧化硅用硅烷偶联剂进行改性;
所述增塑剂为己二酸二辛酯、葵二酸二己酯、柠檬酸三丁酯中的至少一种;
所述植物纤维为玉米秸秆纤维、竹秸秆纤维中的至少一种:
所述抗氧剂为2、4-二叔丙基对乙基亚磷酸酯、β-(2,6-二叔丙基-4-羟基苯基)乙酸正十八碳醇酯中的至少一种。
本发明还提供了一种新型抗静电包装材料的制备方法,具体包括如下步骤:
(3)纳米二氧化硅的改性:将一定量的纳米二氧化硅与乙烯基三乙氧基硅烷按质量比混合后加入研磨机中进行研磨,然后高温干燥2h获得硅烷改性的纳米二氧化硅;
(4)将改性纳米二氧化硅填充料、抗静电剂、增塑剂、植物纤维、抗氧化剂按质量比依次加入搅拌机中进行搅拌混合,获得混合料;
(3)将步骤(2)获得的混合料与线性低密度聚乙烯按质量比加入密炼机中进行密炼,获得密炼料;
(4)对步骤(3)获得的密炼料投入挤出机中挤出,获得粒料。
进一步的,所述粒料根据使用需求可以注塑成不同的形状。
本发明的有益效果在于:(1)采用聚乙烯醇接枝改性的多壁碳纳米管抗静电填料可以与线性低密度聚乙烯高分子材料较好的相容,利用高分子材料间的分子链互穿,实现了导电填料的稳固嵌入,提升了包装材料的力学性能。(2)配方中添加有聚乙烯醇、植物纤维,增加了包装材料的生物可降解性,更为环保。
具体实施方式
下面结合实施例对本发明作进一步的描述,所描述的实施例仅仅是本发明一部分实施例。基于本发明实施例,本领域的普通技术人员在没有做出创造性劳动所做的等同替换或改进,都在本发明的保护范围之内。
本发明实施例使用得抗静电填料为实验室自制,具体制备方法包括如下步骤:
(1)将20g的多壁碳纳米管(MWNTs)分批加入2000mL的硫酸硝酸的混合溶液中(硫酸∶硝酸=3∶1,体积比),超声振荡3h后,用10L的去离子水稀释,然后用PTFE多孔滤膜滤出,然后用去离子水反复洗涤至溶液呈中性,真空干燥24h得MWNTs-COOH;
(2)将5gMWNTs-COOH溶于20mL得氯化亚砜中,滴加5gN,N-二甲基甲酰胺,升高温度到70℃反应24h后冷却混合液,过滤,用二氯甲烷洗涤,干燥得MWNTs-COCl。
(3)在三口烧瓶中加入11gPVA和200mL二甲亚砜,加入1g浓硫酸作为催化剂,然后接入2g MWNTs-COCl,剧烈搅拌下回流反应3h直至反应物变为胶状,然后将反应物加入1L得去离子水中,析出沉淀,过滤、洗涤、干燥得PVA接枝得多半碳纳米管MWNTs-CO-PVA。
实施例1:
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯40份、改性纳米二氧化硅9份、抗静电剂5份、己二酸二辛酯4份、玉米秸秆纤维3份、2、4-二叔丙基对乙基亚磷酸酯1份:
所述新型抗静电包装材料的制备方法,具体包括如下步骤:
(1)纳米二氧化硅的改性:将1kg的纳米二氧化硅与10g乙烯基三乙氧基硅烷按质量比混合后加入研磨机中进行研磨,然后80℃下干燥2h获得硅烷改性的纳米二氧化硅;
(2)将改性纳米二氧化硅填充料9g、抗静电剂5g、己二酸二辛酯4g、玉米秸秆纤维3g、2、4-二叔丙基对乙基亚磷酸酯1g按质量比依次加入搅拌机中进行搅拌混合,获得混合料;
(3)将步骤(2)获得的混合料与线性低密度聚乙烯40g按质量比加入密炼机中进行密炼,获得密炼料;
(4)对步骤(3)获得的密炼料投入挤出机中挤出,获得粒料。
实施例2:
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯45份、改性纳米二氧化硅11份、抗静电剂5份、葵二酸二己酯3份、玉米秸秆纤维3份、2、4-二叔丙基对乙基亚磷酸酯1份:
所述新型抗静电包装材料的制备方法,同实施例1;
实施例3:
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯55份、改性纳米二氧化硅15份、抗静电剂7份、葵二酸二己酯5份、竹秸秆纤维5份、2、4-二叔丙基对乙基亚磷酸酯1份:
所述新型抗静电包装材料的制备方法,同实施例1;
实施例4:
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯55份、改性纳米二氧化硅15份、抗静电剂10份、葵二酸二己酯5份、竹秸秆纤维5份、β-(2,6-二叔丙基-4-羟基苯基)乙酸正十八碳醇酯1份:
所述新型抗静电包装材料的制备方法,同实施例1;
实施例5:
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯65份、改性纳米二氧化硅24份、抗静电剂15份、葵二酸二己酯5份、竹秸秆纤维5份、β-(2,6-二叔丙基-4-羟基苯基)乙酸正十八碳醇酯1份:
所述新型抗静电包装材料的制备方法,同实施例1;
对比列1
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯40份、改性纳米二氧化硅9份、多壁碳纳米管5份、己二酸二辛酯4份、玉米秸秆纤维3份、2、4-二叔丙基对乙基亚磷酸酯1份:
对比例2
本实施例提供一种新型抗静电包装材料,所述材料包括如下重量份数的组成:线性低密度聚乙烯55份、改性纳米二氧化硅15份、多壁碳纳米管10份、葵二酸二己酯5份、竹秸秆纤维5份、β-(2,6-二叔丙基-4-羟基苯基)乙酸正十八碳醇酯1份:
所述新型抗静电包装材料的制备方法,同实施例1;
对上述实施例和对比例制备的包装材料,分别进行力学性能和表面电阻率的测试。其中,表面电阻率的测试采用GB/T15738-1995导电和抗静电纤维增强塑料电阻率试验方法测试;力学性能测试采用GB1040塑料拉伸测试;相关测试结果如表1所示:
表1.抗静电包装材料性能
由上述实施例和对比例的数据可知,当实施例中其它组分不变的情况下,用本发明所述的抗静电剂替换常规多壁碳纳米管后,表面电阻率保持在同一数量级水平,同时抗拉强度和力学性能有显著提升。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (6)
1.一种新型抗静电包装材料,其特征在于,所述材料包括如下重量份数的组成:线性低密度聚乙烯35-70份、填充料8-24份、抗静电剂5-18份、增塑剂3-10份、植物纤维3-8份、抗氧化剂1-5份:
所述抗静电剂的制备方法主要包括如下步骤:(1)将一定量的多壁碳纳米管置于硫酸和硝酸的混酸中,进行超声振荡反应3-5h,然后用去离子水稀释后过滤,洗涤得羧基功能化得碳纳米管;(2)将羧基功能化的碳纳米管与氯化亚砜反应得到酰氯功能化的碳纳米管;(3)将酰氯功能化的碳纳米管与聚乙烯醇在浓硫酸催化下与羟基发生接枝反应,得聚乙烯醇功能化的碳纳米管抗静电剂;
具体反应过程如下:
2.根据权利要求1所述的一种新型抗静电包装材料,其特征在于,所述填充料为改性纳米二氧化硅,具体是将纳米二氧化硅用硅烷偶联剂进行改性。
3.根据权利要求1所述的一种新型抗静电包装材料,其特征在于,所述增塑剂为己二酸二辛酯、葵二酸二己酯、柠檬酸三丁酯中得至少一种。
4.根据权利要求1所述的一种新型抗静电包装材料,其特征在于,所述植物纤维为玉米秸秆纤维、竹秸秆纤维中的至少一种。
5.根据权利要求1所述的一种新型抗静电包装材料,其特征在于,所述抗氧化剂为2、4-二叔丙基对乙基亚磷酸酯、β-(2,6-二叔丙基-4-羟基苯基)乙酸正十八碳醇酯中得至少一种。
6.权利要求1-5中任一项所述的一种新型抗静电包装材料的制备方法,具体包括如下步骤:
(1)纳米二氧化硅的改性:将一定量的纳米二氧化硅与乙烯基三乙氧基硅烷按质量比混合后加入研磨机中进行研磨,然后高温干燥2h获得硅烷改性的纳米二氧化硅;
(2)将改性纳米二氧化硅填充料、抗静电剂、增塑剂、植物纤维、抗氧化剂按质量比依次加入搅拌机中进行搅拌混合,获得混合料;
(3)将步骤(2)获得的混合料与线性低密度聚乙烯按质量比加入密炼机中进行密炼,获得密炼料;
(4)对步骤(3)获得的密炼料投入挤出机中挤出,获得粒料。
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