CN105504355B - 一种以甜菜废粕为基质的包装材料及其制备方法 - Google Patents
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Abstract
本发明公开了一种以甜菜废粕为基质的包装材料及其制备方法,所述包装材料按照质量比由甜菜废粕100、黄原胶基粘合剂30~50制成。具体制备方法如下:一、黄原胶基粘合剂的制备:(1)甜菜废粕预处理;(2)菌种活化;(3)菌种扩大培养;(4)固态发酵基调配、灭菌;(5)在主发酵罐中加入发酵底物和扩大培养后的菌种进行发酵,得到黄原胶基粘合剂;二、包装用生物降解材料制备:以甜菜废粕为原料,经研磨成粉体,与制备的黄原胶基粘合剂混合成颗粒,经挤压成型、合成片材、吸塑机成型,最终生产出完全降解的包装材料。该方法制备的包装材料具有阻隔性能好、机械性能优良、降解速度快、无污染、生产工艺简单、容易大批量生产等特点。
Description
技术领域
本发明涉及一种以甜菜废粕固态发酵产黄原胶为粘合剂,甜菜废粕为基质的生物降解包装材料及其制备方法。
背景技术
自化学合成塑料包装材料问世后,以其来源丰富、产品美观、质轻、卫生、加工方便、价格便宜、性质稳定而广泛应用于各种物品的包装。随着社会经济的高速发展和大众绿色消费意识的增强,这些不易降解包装材料造成的环境污染问题已日益受到国际上的重视,人们对替代塑料包装材料的绿色材料研制引起广泛重视,可快速完全生物降解性包装材料已成为世界包装工业科技发展的主要趋势,也是未来包装业发展的主要方向。
甜菜废粕是制糖工业的废物,主要成分是纤维素、半纤维素、果胶以及少量的蛋白质、木质素和灰分,其来源充足,目前主要用于反刍动物饲料。
发明内容
本发明的目的在于提供一种以甜菜废粕为基质的可完全生物降解包装材料及其制备方法,该方法制备的包装材料具有阻隔性能好、机械性能优良、降解速度快、无污染、生产工艺简单、容易大批量生产等特点。
本发明的目的是通过以下技术方案实现的:
一种以甜菜废粕为基质的包装材料,按照质量比由甜菜废粕100、黄原胶基粘合剂30~50制成。
一种上述以甜菜废粕为基质的包装材料的制备方法,包括如下步骤:
一、黄原胶基粘合剂的制备
(1)甜菜废粕预处理:甜菜干粕→除杂→粉碎→筛分→甜菜干粕粉。
(2)菌种活化:将野油菜黄单胞菌接到固体培养基中。
(3)菌种扩大培养:经活化的菌种接种到液体培养基中进行扩大培养。
(4)发酵营养液:发酵营养液成分按照质量百分比由蔗糖4%-6%、蛋白胨0.4~0.6%、酵母粉0.2~0.4%、碳酸钙0.2~0.4%、磷酸二氢钾0.4%-0.6%的水溶液构成。
(5)固态发酵基调配、灭菌:将甜菜废粕粉与发酵营养液按1:2~5的质量比混匀,灭菌后作为发酵底物。
(6)在主发酵罐中加入发酵底物和扩大培养后的菌种进行发酵,控制反应温度为28±2℃,反应时间为72~120h,菌种添加量为8~10%,得到黄原胶基粘合剂。
二、包装用生物降解材料制备
以甜菜废粕为原料,经研磨成粉体,与制备的黄原胶基粘合剂混合成颗粒,经挤压成型、合成片材、吸塑机成型,最终生产出完全降解的包装材料。
本发明具有如下优点:
1、本发明利用甜菜废粕为原料制备可完全生物降解性包装材料。将甜菜废粕加工成包装材料是甜菜废粕综合利用的一条新途径,不仅可以提高甜菜的综合利用率,同时还可以制备出性能优良的可完全生物降解性包装材料,而且可以解决化工合成包装材料的不易降解而破坏环境的问题。
2、本发明制备工艺不在成品中添加任何塑料成分,安全、环保、无公害,生产的主要原料取自甜菜制糖的废弃资源,可以大大减轻不可再生资源的需求,减少对环境的破坏,制成品可以完全生物降解。而且生产过程不会造成环境污染,产品使用后丢弃也不会造成二次污染问题,可以分解后可与肥料混合使用,不会分解产生不利人身健康的物质。
3、甜菜废粕为基料的包装材料,对充分利用甜菜制糖后的废粕资源,使其变废为宝,对推动当地经济发展、解决“白色污染”问题和改善人民的健康状况等方面有一定的实际意义。
4、本发明制备的材料厚度为1mm时,氧气透过率为400cm3/m2·0.1MPa;材料机械性能按国标GB/T453-1989,GB/T455.1-1989,GB/T454-1989,GB/T457-1989测定,抗涨指数为20/N·m2·g-1,耐破指数为1.5/KPa·m2·g-1,撕裂指数为18/mN·m2·g-1,耐折次数为8次;材料使用后经粉碎,在翻地时直接分撒到农田中,当年即可分解作为有机肥料。
附图说明
图1为以甜菜废粕为基质的包装材料的制备工艺流程图。
具体实施方式
下面结合附图对本发明的技术方案作进一步的说明,但并不局限于此,凡是对本发明技术方案进行修改或者等同替换,而不脱离本发明技术方案的精神和范围,均应涵盖在本发明的保护范围中。
具体实施方式一:如图1所示,本实施方式提供了一种以甜菜废粕为基质的包装材料的制备方法,具体实施步骤如下:
(1)甜菜废粕预处理:本实施方式使用的甜菜废粕是干燥后的废粕,将甜菜废粕清除杂质,称重。
(2)粉碎:采用高速研磨机将甜菜废粕粉碎。
(3)筛分:粉碎后的甜菜废粕过100目筛子,得到甜菜废粕粉。
(4)菌种活化:挑取保藏于冰箱中的野油菜黄单胞菌,接种于固体培养基(蔗糖2g,蛋白胨0.5g,酵母粉0.2g,琼脂2g,水100mL)。在隔水式培养箱中28℃培养36h活化,传代,备用。
(5)生产菌种:野油菜黄单胞菌生产菌种培养时,种子槽容积1000L,涡轮搅拌器和调温蛇管,材质为不锈钢。底液为种子培养基(蔗糖2%,蛋白胨0.5%,酵母粉0.2%),液量为600~700L,将实验室培养好的菌种接入,在28±2℃下培养24h,即可生产发酵乳酸菌种子。
(6)发酵底物:水中加入甜菜废粕粉25%,蔗糖3 %,蛋白胨0.4%,酵母粉0.2%,碳酸钙0.2%,磷酸二氢钾0.4%混匀,121℃湿热灭菌 20min后作为发酵底物。
(7)发酵:所用的发酵罐为改进的立式多层发酵箱。发酵培养基原料经热处理后冷却至25~28℃时添加发酵菌,菌种添加量为8~10%,发酵温度应控制在产黄原胶最适生长温度范围之内28℃±2。在这个温度阶段的发酵时间3d。
(8) 粘合剂指标:制备的粘合剂按GB/T 14074-2006测得其黏度要高于50(Pa·s)。
(9)搅拌成型:制备的粘合剂和甜菜废粕粉送入混合机混合成型,形成湿坯料,物料质量配比为甜菜废粕100、黄原胶基粘合剂30~50。
(9)定型:湿坯料放入热压定型机,进行热压定型。
(10)片材机:将热压定型的制品压成薄片形状。
(11)吸塑机:将片状制成所需的包装产品、塑料袋及日常餐具等各种形状食品容器,产品防霉、有足够防渗漏能力、易降解、无污染,完全可取代塑料包装容器,还可回收作为饲料或有机肥料。
具体实施方式二:本实施方式与具体实施方式一不同的是,根据最终产品应用领域,还可以添加防水防油剂等。作为一种改进,具体实施方式一的制备工艺对特殊用途还可以进行如下处理。
A、喷涂:
当产品用于包装含水量高的商品时,将防水剂喷涂到制品表面。通过在制品表面喷涂防水剂,可以在大大减少防水剂用量的情况下保持相同甚至更好的防水性能,从而降低高成本原料的用量,减低成本。防水剂为阳离子型防水剂,该型防水剂经食品安全性毒理学检验为无毒产品,适用于餐饮具的施胶。施胶后的制品可达到餐饮具的防水要求,并可大幅度提高制品的机械性能。
B、消毒
生产的以甜菜废粕为基质的包装材料成品采用紫外线消毒处理。当成品需要作为餐饮具使用时,需要进行消毒,达到餐饮具的卫生要求。
具体实施方式三:本实施方式与具体实施方式一、二不同的是,甜菜废粕与黄原胶基粘合剂的质量比为100:35。
具体实施方式四:本实施方式与具体实施方式一、二不同的是,甜菜废粕与黄原胶基粘合剂的质量比为100:40。
具体实施方式五:本实施方式与具体实施方式一、二不同的是,甜菜废粕与黄原胶基粘合剂的质量比为100:45。
Claims (6)
1.一种以甜菜废粕为基质的包装材料,其特征在于所述包装材料按照质量比由甜菜废粕100、黄原胶基粘合剂30~50制成;所述黄原胶基粘合剂按照以下方法制备而成:
(1)甜菜废粕预处理:甜菜干粕→除杂→粉碎→筛分→甜菜干粕粉;
(2)菌种活化:将野油菜黄单胞菌接到固体培养基中;
(3)菌种扩大培养:经活化的菌种接种到液体培养基中进行扩大培养;
(4)固态发酵基调配、灭菌:将甜菜干粕粉与发酵营养液按1:2~5的质量比混匀,灭菌后作为发酵底物;
(5)在主发酵罐中加入发酵底物和扩大培养后的菌种进行发酵,控制反应温度为28±2℃,反应时间为72~120h,菌种添加量为8~10%,得到黄原胶基粘合剂。
2.根据权利要求1所述的以甜菜废粕为基质的包装材料,其特征在于所述甜菜废粕与黄原胶基粘合剂的质量比为100:35。
3.根据权利要求1所述的以甜菜废粕为基质的包装材料,其特征在于所述甜菜废粕与黄原胶基粘合剂的质量比为100:40。
4.根据权利要求1所述的以甜菜废粕为基质的包装材料,其特征在于所述甜菜废粕与黄原胶基粘合剂的质量比为100:45。
5.根据权利要求1所述的以甜菜废粕为基质的包装材料,其特征在于所述发酵营养液成分按照质量百分比由蔗糖4~6%、蛋白胨0.4~0.6%、酵母粉0.2~0.4%、碳酸钙0.2~0.4%、磷酸二氢钾0.4~0.6%的水溶液构成。
6.一种权利要求1-5任一权利要求所述的以甜菜废粕为基质的包装材料的制备方法,其特征在于所述方法步骤如下:
一、黄原胶基粘合剂的制备
(1)甜菜废粕预处理:甜菜干粕→除杂→粉碎→筛分→甜菜干粕粉;
(2)菌种活化:将野油菜黄单胞菌接到固体培养基中;
(3)菌种扩大培养:经活化的菌种接种到液体培养基中进行扩大培养;
(4)固态发酵基调配、灭菌:将甜菜干粕粉与发酵营养液按1:2~5的质量比混匀,灭菌后作为发酵底物;
(5)在主发酵罐中加入发酵底物和扩大培养后的菌种进行发酵,控制反应温度为28±2℃,反应时间为72~120h,菌种添加量为8~10%,得到黄原胶基粘合剂;
二、包装用生物降解材料制备
以甜菜废粕为原料,经研磨成粉体,与制备的黄原胶基粘合剂混合成颗粒,经挤压成型、合成片材、吸塑机成型,最终生产出完全降解的包装材料。
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