CN102504298B - 一种明胶/phbv共混膜的制备方法 - Google Patents

一种明胶/phbv共混膜的制备方法 Download PDF

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CN102504298B
CN102504298B CN 201110291480 CN201110291480A CN102504298B CN 102504298 B CN102504298 B CN 102504298B CN 201110291480 CN201110291480 CN 201110291480 CN 201110291480 A CN201110291480 A CN 201110291480A CN 102504298 B CN102504298 B CN 102504298B
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gelatin
phbv
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blend film
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CN102504298A (zh
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李亚
邵双喜
蒋岚
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Ningbo University of Technology
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Abstract

本发明公开一种明胶/聚PHBV共混膜的制备方法,属于天然高分子材料与合成高分子材料共混领域。该共混膜由明胶溶液和聚(3-羟基丁酸酯-3-羟基戊酸酯)(即PHBV)溶液混合后加入增塑剂,搅拌均匀后用流延法成膜制得,共混膜中明胶的质量百分比为10~70%,增塑剂为0.1~3%。该共混膜所用原料——明胶和PHBV分别为天然和合成的可降解高分子材料,来源广泛,价格低廉,且共混膜制备方法操作简便、易于掌握,综合了明胶和PHBV的性能优点,产品具有可生物降解性不产生污染,有利于环境保护。

Description

一种明胶/PHBV共混膜的制备方法
技术领域
本发明涉及一种明胶/PHBV共混膜的制备方法,属于天然高分子材料与合成高分子材料共混领域。
背景技术
明胶是一种价廉易得的可再生天然高分子材料,可由动物皮、骨、腱和韧带组织中的胶原蛋白部分水解得到,具有极其优良的物理性质和良好的生物相容性,在食品、生物医药等领域有着广泛的应用。明胶成膜性好且具有良好的亲水性,可有效的阻止CO2和O2透过,但明胶膜质脆、力学性能差,限制了其在包装材料领域的广泛使用。聚(3-羟基丁酸酯-3-羟基戊酸酯)(即PHBV)是一种具有良好的生物降解性和生物相容性的合成高分子材料,由PHBV制成的产品生物相容性、透明性、强度和耐热性好,还具有一定的耐菌性、阻燃性和抗紫外性,在生物可降解包装材料、组织工程材料、缓释材料及电学材料等方面得到广泛应用。共混改性是开发材料的一个重要途径,通过将不同材料进行复合消除各单一组分的性能弱点,获得综合性能优良的材料。通常采用明胶与其他材料交联和共混的办法来改善其性能,已有的研究有明胶与聚乙烯醇(PVA)、葵花籽油、甲壳胺、壳聚糖等的共混改性及用甲醛、戊二醛、异氰酸酯等进行化学交联改性等,但关于明胶与PHBV改性的研究鲜有报道。
发明内容
本发明的目的是针对明胶膜质脆、强度和弹性较差的缺点,通过共混这一简单有效的提高材料性能的方法,将明胶与同样具有良好生物降解性且力学性能优良的PHBV共混,提供一种综合性能较理想的明胶/PHBV共混膜的制备方法,该方法工艺简单,产物具有生物降解性和较好的力学性能,亲水性介于明胶和PHBV之间,可用作包装膜或用于生物医学领域。
本发明提供的技术方案是采用以下方法制备明胶/PHBV共混膜:
(1)将适量明胶溶于溶剂中,得到浓度(w/v)为2~8%的明胶溶液;
(2)将适量的PHBV溶于溶剂中,得到浓度(w/v)为2~8%的PHBV溶液;
(3)将上述两种溶液按一定的质量比混合,加入适量的增塑剂,充分混合均匀后在玻璃板或聚四氟乙烯板上通过流延法成膜,室温下干燥4h后放入真空烘箱中干燥成膜。
共混膜中明胶的质量百分比为10~70%,增塑剂为0.1~3%。
所述步骤(1)和步骤(2)中所用的溶剂为二甲基亚砜或2,2,2-三氟乙醇。
所述步骤(3)中所用增塑剂为丙三醇或乙二醇。
本发明中所用的原材料为明胶和PHBV,来源广泛,价格低廉,具有良好的生物降解性,而且产品在制备和使用过程中不造成环境污染。利用该方法制备共混膜,方法所用设备和工艺简单,且达到了明胶和PHBV性能互补的目的,共混膜具有较好的力学性能和适当的亲水性,呈疏松多孔结构(见图1),可用于包装和生物医学领域。
附图说明
附图为按照实施例3制备的共混膜的SEM图。
具体实施方式
实施例1
将2g明胶加入50mL 2,2,2-三氟乙醇中,搅拌使其完全溶解,制得浓度(w/v)为4%的明胶溶液。取2gPHBV溶于50mL 2,2,2-三氟乙醇中,制成浓度(w/v)为4%的均匀溶液,然后将上述明胶溶液和PHBV溶液混合,并加入0.02g丙三醇,磁力搅拌45min后,将混合液浇铸在聚四氟乙烯模具上,放入通风橱中室温干燥4h后,在30℃真空干燥至溶剂完全挥发后即可得明胶/PHBV的共混膜。
实施例2
取2g明胶溶于40mL的40℃二甲基亚砜,充分搅拌后制得浓度(w/v)为5%的均匀明胶溶液;将3gPHBV溶于50mL的40℃二甲基亚砜中,充分搅拌后制得浓度(w/v)为6%的溶液。将上述40mL 5%的明胶溶液和50mL 6%的PHBV溶液混合,然后加入丙三醇0.05g,40℃搅拌2h后,将溶液浇铸在已经过疏水处理的玻璃板制成的模具上,室温干燥4h后放入真空干燥箱中30℃干燥至溶剂完全挥发,即可得明胶/PHBV的共混膜。
实施例3
称取4g明胶溶于50mL 2,2,2-三氟乙醇中,搅拌使其完全溶解,制得浓度(w/v)为8%的明胶溶液。取8gPHBV溶于100mL 2,2,2-三氟乙醇中,完全溶解后制成浓度(w/v)为8%的均匀溶液,然后将上述明胶溶液和PHBV溶液混合,并加入0.24g乙二醇,搅拌60min后,将混合液浇注在已经过疏水处理的玻璃板上,放入通风橱中室温干燥4h后,在30℃真空干燥至溶剂完全挥发,即可得明胶/PHBV的共混膜。
实施例4
取6g明胶溶于100mL的40℃二甲基亚砜,充分搅拌后制得浓度(w/v)为6%的明胶均匀溶液;将3gPHBV溶于50mL的40℃二甲基亚砜中,充分搅拌后制得浓度(w/v)为6%的均匀溶液。将上述明胶溶液和PHBV溶液混合,然后在溶液中加入乙二醇0.15g,40℃搅拌2h后,将溶液浇铸在聚四氟乙烯模具上,室温干燥4h后放入真空干燥箱中30℃干燥至溶剂完全挥发,即可得明胶/PHBV的共混膜。

Claims (3)

1.一种明胶/PHBV共混膜的制备方法,其特征在于采用如下方法制得:
(1)将适量明胶溶于溶剂中,充分搅拌至明胶完全溶解得到浓度w/v为2~8%的明胶溶液;
(2)将适量的PHBV溶于溶剂中,充分搅拌至完全溶解后得到浓度w/v为2~8%的PHBV溶液;
(3)将上述两种溶液按一定的质量比混合,加入适量的增塑剂,充分混合均匀,然后将混合液在玻璃板或聚四氟乙烯板上通过流延法成膜,室温下干燥4h后移入真空烘箱中干燥成膜;
其中,明胶在共混膜中所占质量百分比为10~70%,增塑剂所占质量百分比为0.1~3%。
2.根据权利要求1所述的一种明胶/PHBV共混膜的制备方法,其特征在于:制备明胶溶液和PHBV溶液所用的溶剂为二甲基亚砜或2,2,2-三氟乙醇。
3.根据权利要求1所述的一种明胶/PHBV共混膜的制备方法,其特征在于:所用增塑剂为丙三醇或乙二醇。
CN 201110291480 2011-09-21 2011-09-21 一种明胶/phbv共混膜的制备方法 Expired - Fee Related CN102504298B (zh)

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