CN114479148A - 具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法 - Google Patents
具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法 Download PDFInfo
- Publication number
- CN114479148A CN114479148A CN202210174334.5A CN202210174334A CN114479148A CN 114479148 A CN114479148 A CN 114479148A CN 202210174334 A CN202210174334 A CN 202210174334A CN 114479148 A CN114479148 A CN 114479148A
- Authority
- CN
- China
- Prior art keywords
- polylactic acid
- antibacterial
- film
- food packaging
- gelatin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 50
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 42
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 41
- 235000013305 food Nutrition 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000012785 packaging film Substances 0.000 title claims abstract description 14
- 229920006280 packaging film Polymers 0.000 title claims abstract description 14
- 229920006381 polylactic acid film Polymers 0.000 claims abstract description 43
- 108010010803 Gelatin Proteins 0.000 claims abstract description 34
- 229920000159 gelatin Polymers 0.000 claims abstract description 34
- 239000008273 gelatin Substances 0.000 claims abstract description 34
- 235000019322 gelatine Nutrition 0.000 claims abstract description 34
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 34
- 239000000499 gel Substances 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 16
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001263 FEMA 3042 Substances 0.000 claims abstract description 10
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims abstract description 10
- 229920002258 tannic acid Polymers 0.000 claims abstract description 10
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims abstract description 10
- 229940033123 tannic acid Drugs 0.000 claims abstract description 10
- 235000015523 tannic acid Nutrition 0.000 claims abstract description 10
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 9
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 7
- 229960001701 chloroform Drugs 0.000 claims description 7
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 5
- 239000003517 fume Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000004014 plasticizer Substances 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 239000000017 hydrogel Substances 0.000 abstract description 9
- 238000004806 packaging method and process Methods 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000004132 cross linking Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 9
- 239000003242 anti bacterial agent Substances 0.000 description 6
- 239000002105 nanoparticle Substances 0.000 description 5
- 239000005022 packaging material Substances 0.000 description 5
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000001648 tannin Substances 0.000 description 4
- 235000013311 vegetables Nutrition 0.000 description 4
- 230000003385 bacteriostatic effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 229920001864 tannin Polymers 0.000 description 3
- 235000018553 tannin Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- AZKVWQKMDGGDSV-BCMRRPTOSA-N Genipin Chemical compound COC(=O)C1=CO[C@@H](O)[C@@H]2C(CO)=CC[C@H]12 AZKVWQKMDGGDSV-BCMRRPTOSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000012055 fruits and vegetables Nutrition 0.000 description 2
- AZKVWQKMDGGDSV-UHFFFAOYSA-N genipin Natural products COC(=O)C1=COC(O)C2C(CO)=CCC12 AZKVWQKMDGGDSV-UHFFFAOYSA-N 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 150000008442 polyphenolic compounds Chemical class 0.000 description 2
- 235000013824 polyphenols Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000000341 volatile oil Substances 0.000 description 2
- KJPRLNWUNMBNBZ-QPJJXVBHSA-N (E)-cinnamaldehyde Chemical compound O=C\C=C\C1=CC=CC=C1 KJPRLNWUNMBNBZ-QPJJXVBHSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 235000011203 Origanum Nutrition 0.000 description 1
- 241001529744 Origanum Species 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 241000235342 Saccharomycetes Species 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229940117916 cinnamic aldehyde Drugs 0.000 description 1
- KJPRLNWUNMBNBZ-UHFFFAOYSA-N cinnamic aldehyde Natural products O=CC=CC1=CC=CC=C1 KJPRLNWUNMBNBZ-UHFFFAOYSA-N 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005003 food packaging material Substances 0.000 description 1
- 235000021022 fresh fruits Nutrition 0.000 description 1
- 108010025899 gelatin film Proteins 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallyl group Chemical group C1(=C(C(=CC=C1)O)O)O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2489/00—Characterised by the use of proteins; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1545—Six-membered rings
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Wrappers (AREA)
Abstract
本发明公开一种具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法，该包装膜由聚乳酸膜层和抗菌明胶水凝胶膜层组成，本发明首先配制聚乳酸三氯甲烷溶液，然后加入甘油作为增塑剂，搅拌、脱气后倒入玻璃板中，置于通风橱中自然晾干，制备得到聚乳酸膜层；在明胶溶液中加入单宁酸和三氯化铁，采用NaOH调节pH值，搅拌交联后，再加入AgNO3制得得到抗菌明胶凝胶溶液；将抗菌明胶凝胶溶液倒入聚乳酸膜表面，烘干即得到具有抗菌和单向阻湿性的聚乳酸膜；本发明制备的聚乳酸膜具有很好的吸湿调湿、耐久的抗菌性能，同时本发明采用的制备方法操作简单、条件温和，使用的原料广泛易得、价格低廉，在食品包装领域具有广泛的应用前景。
Description
技术领域
本发明属于包装材料技术领域，具体涉及一种具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法。
背景技术
食品包装是食品工业中的重要组成部分，对食品品质具有重要保护作用。目前，市场中的食品包装材料大多为不可降解的石油基塑料，我国九成食品包装会被废弃，其所造成的白色污染也日趋严重。随着2021年国家“禁塑令”的颁布及大众环保意识的提高，开发功能性绿色环保可降解新型塑料包装的相关研究迫在眉睫。
聚乳酸 (PLA) 是一种以乳酸为主要合成原料的生物可降解的热塑形聚酯，其单体乳酸可通过甘蔗和玉米淀粉等可再生资源中的糖发酵得到。因机械性能与聚苯乙烯(PS) 和聚对苯二甲酸乙二醇酯 (PET) 类似，且易加工、易成型、零毒性、生物相容性强、具有良好的物理机械性能和热塑性、可堆肥、分解后仅生成水和二氧化碳，故可作为传统塑料包装的有效替代品。然而，由于单纯聚乳酸膜缺乏抗菌性，限制了其在食品包装领域的应用。尽管目前采用聚乳酸和无机纳米粒子抗菌剂（如纳米银、纳米二氧化钛、纳米银）共混制备抗菌聚乳酸复合膜已有大量的研究报道，但常常会出现纳米粒子在聚乳酸膜中的团聚问题，造成抗菌效果降低，同时纳米粒子在聚乳酸膜中结合不牢固，易从膜中脱落迁移到内包食品中，从而引起潜在的食品安全风险。此外，传统的聚乳酸膜内外两侧对水分具有相同的阻隔性，特别是当内包物为新鲜果蔬时，由于果蔬自身的呼吸作用会产生大量的水汽，当水汽累积散发不出去时会在包装内部凝结，为微生物的生长和繁殖提供了有利的条件，加速果蔬的腐败，造成严重的食品安全隐患和经济损失。尽管通过在包装材料表面打孔可有效防止水汽的积累，但又易造成果蔬水分的快速挥发流失。理想的果蔬包装材料应该是对包装材料外侧的水分具有阻隔性，且同时对包装材料内侧的水分具有一定的吸湿性，以防止包装内层水分的凝结。因此，研发一款拥有抗菌性和单向阻湿性的功能性聚乳酸食品包装膜具有十分重要的意义。
专利CN110744880A公布了一种果蔬高透气单向阻湿膜及其制备方法，其首先采用京尼平交联羧甲基壳聚糖，随后加入天然抗菌剂（茶多酚、肉桂醛精油、牛至精油）制备了水凝胶膜，随后以乙基纤维素和Tween-80的乙醇溶液作为纺丝溶液，在水凝胶膜上进行静电纺丝，直至纺丝膜层完全覆盖住水凝胶膜层，得到单向阻湿膜。该发明在凝胶膜的制备中采用了价格高昂的京尼平作为交联剂，交联时间较长（4-12h）；选用的天然抗菌剂耐热性差、使用寿命短，外侧乙基纤维素层的制备还需要专门的静电纺丝设备，严重限制了该发明的推广使用。
发明内容
针对上述问题，本发明提供了一种工艺简单、操作简便、成本更加低廉的具有耐久抗菌性、对内吸湿调湿和对外防水的单向阻湿聚乳酸食品包装膜的制备方法，包装膜由聚乳酸膜层和抗菌明胶水凝胶膜层组成，制备工艺如下：
（1）聚乳酸膜层的制备：称取一定量的聚乳酸溶于100mL三氯甲烷溶液中，加入一定量的甘油作为增塑剂，搅拌使其完全溶解，超声脱气，得到聚乳酸溶液，然后将其倒入自制玻璃板中，放入通风橱中，室温下晾干，得到聚乳酸膜层；
每100mL三氯甲烷中聚乳酸的添加量为2-4g，甘油的添加量为0.6-1.2g；
（2）抗菌明胶凝胶溶液的制备：称取一定量的明胶分散于100mL的水中，搅拌加热到70℃使其充分溶解后，冷却至40℃后，加入一定量的单宁酸和三氯化铁，采用NaOH调节溶液pH值至7-8，并在40℃条件下继续搅拌5min，形成凝胶溶液，向溶液B中加入一定量的硝酸银，40℃下搅拌30min-120min，得到抗菌明胶凝胶溶液；
每100mL水中明胶的添加量为2-4g，单宁酸的添加量为2-6mg，三氯化铁的添加量为1-3mg，硝酸银的添加量为0.1-0.2g；
（3）将抗菌明胶凝胶溶液倒至步骤（1）所形成的聚乳酸膜层表面，放入真空干燥箱30-45℃烘干，揭膜，即得到具有抗菌和单向阻湿性聚乳酸膜。
通过采用上述技术，与现有技术相比，本发明的有益效果如下：
（1）本发明采用来源广泛、价格低廉的植物多酚单宁酸与Fe3+形成的稳定的五元环络合物作为交联剂，利用明胶大分子链与单宁酸分子的多重氢键作用以及单宁酸上的邻苯二酚与Fe3+的配位交联作用形成网络结构水凝胶，可实现对包装内水汽的吸收、储存功能，有效抑制了包装内水汽凝结对内包物造成的伤害；
（2）本发明中基于明胶中丰富的氨基及单宁酸中丰富的邻苯二酚基团对银离子的螯合作用，以及单宁酸的连苯三酚基团对银离子的还原作用，可实现对银离子的原位还原生成纳米银，避免了额外还原剂的加入和纳米银的团聚问题。在无机抗菌剂中，纳米银因其毒性低、抗菌活性高、抗菌谱广等特点，已得到广泛应用。纳米银对细菌、酵母菌、真菌等都具有较强的抗菌性。与有机抗菌剂和天然抗菌剂相比，纳米银具有广谱、耐久的特点，从而赋予包装膜更加耐久的抗菌性。此外，由于生成的纳米银通过共价键与明胶、单宁酸分子牢牢结合，可有效减缓纳米银从食品包装膜的迁出，避免潜在的食品安全风险；
（3）本发明采用简单的延流成膜法，操作简单，不需要昂贵的仪器设备即可实现，发明技术的推广更容易。
附图说明
图1是实施例1-3聚乳酸膜抑菌圈直径随培养时间的变化情况；
图2是实施例1-3聚乳酸膜的吸湿检测结果；
图3是实施例1-3聚乳酸膜的放湿检测结果。
具体实施方式
下面结合附图和实施例对本发明作进一步详细说明，但本发明的保护范围并不限于所述内容。
实施例1
（1）聚乳酸膜层的制备：称取2g的聚乳酸溶于100mL三氯甲烷溶液中，加入0.6g的甘油作为增塑剂，搅拌使其完全溶解，超声脱气，得到聚乳酸溶液，然后将其倒入20×20cm自制玻璃板中，放入通风橱中，室温下晾干，得到聚乳酸膜层；
（2）抗菌明胶凝胶溶液的制备：称取2g明胶分散于100mL的水中，搅拌加热到70℃使其充分溶解后，冷却至40℃后，加入2mg单宁酸和1mg三氯化铁，采用NaOH调节溶液pH值至7.0，并在40℃条件下继续搅拌5min，形成凝胶溶液，向凝胶溶液中加入0.1g硝酸银，40℃下搅拌30min，得到抗菌明胶凝胶溶液。
（3）将抗菌明胶凝胶溶液倒至步骤（1）所形成的聚乳酸膜层表面，放入真空干燥箱35℃烘干，揭膜，即得到具有抗菌和单向阻湿性聚乳酸膜。
实施例2
（1）聚乳酸膜层的制备：称取3g的聚乳酸溶于100mL三氯甲烷溶液中，加入0.9g的甘油作为增塑剂，搅拌使其完全溶解，超声脱气，得到聚乳酸溶液，然后将其倒入20×20cm自制玻璃板中，放入通风橱中，室温下晾干，得到聚乳酸膜层；
（2）抗菌明胶凝胶溶液的制备：称取3g明胶分散于100mL的水中，搅拌加热到70℃使其充分溶解后，冷却至40℃后，加入4mg单宁酸和2mg三氯化铁，采用NaOH调节溶液pH值至7.5，并在40℃条件下继续搅拌5min，形成凝胶溶液，向凝胶溶液中加入0.15g硝酸银，40℃下搅拌75min，得到抗菌明胶凝胶溶液；
（3）将抗菌明胶凝胶溶液倒至步骤（1）所形成的聚乳酸膜层表面，放入真空干燥箱45℃烘干，揭膜，即得到具有抗菌和单向阻湿性聚乳酸膜。
实施例3
（1）聚乳酸膜层的制备：称取4g的聚乳酸溶于100mL三氯甲烷溶液中，加入1.2g的甘油作为增塑剂，搅拌使其完全溶解，超声脱气，得到聚乳酸溶液，然后将其倒入20×20cm自制玻璃板中，放入通风橱中，室温下晾干，得到聚乳酸膜层；
（2）抗菌明胶凝胶溶液的制备：称取4g明胶分散于100mL的水中，搅拌加热到70℃使其充分溶解后，冷却至40℃后，加入6mg单宁酸和3mg三氯化铁，采用NaOH调节溶液pH值至8.0，并在40℃下继续搅拌5min，形成凝胶溶液，向凝胶溶液中加入0.2g硝酸银，40℃条件下搅拌120 min，得到抗菌明胶凝胶溶液；
（3）将抗菌明胶凝胶溶液倒至步骤（1）所形成的聚乳酸膜层表面，放入真空干燥箱40℃烘干，揭膜，即得到具有抗菌和单向阻湿性聚乳酸膜。
实施例4：抗菌和单向阻湿性聚乳酸膜性能检测
1、采用抑菌圈法检测上述实施例制得的抗菌和单向阻湿性聚乳酸膜的抑菌效果，测试菌种为大肠杆菌，测试方法参照文献“He, Y., Li, H., Fei, X., Peng, L.Carboxymethyl cellulose/cellulose nanocrystals immobilized silvernanoparticles as an effective coating to improve barrier and antibacterialproperties of paper for food packaging applications [J]. Carbohydratepolymers, 2021, 252:117156.”中方法进行，结果见图1，从图中可以看出在培养了60h后，抑菌圈尺寸并未出现降低的情况，表明了制备的聚乳酸膜具有持久的抗菌效果。
2、采用重量法检测上述实施例1-3中制得的抗菌和单向阻湿性聚乳酸膜两侧水蒸气透过率，检测方法参照“Li, H., Shi, H., He, Y., Fei, X., Peng, L. Preparationand characterization of carboxymethyl cellulose-based composite filmsreinforced by cellulose nanocrystals derived from pea hull waste for foodpackaging applications [J]. International Journal of BiologicalMacromolecules, 2020, 164: 4104-4112.”中方法进行，结果见下表，可以看出疏水性聚乳酸膜层对水蒸气的阻隔性大于水凝胶膜层，表现出单向阻湿性。
表不同聚乳酸膜两侧水蒸气透过率值
注：外侧指的是聚乳酸膜层侧；内侧指的是水凝胶膜层侧。
3、采用文献“Shao, P., Wu, W., Chen, H., Sun, P., Gao, H. Bilayeredible films with tunable humidity regulating property for inhibitingbrowning of Agaricus bisporus [J]. Food Research International, 2020, 138:109795.”中的方法检测上述实施例1-3中制得的抗菌和单向阻湿性聚乳酸膜的吸湿和放湿情况，结果见图2、3，从图中可以看出制得的抗菌和单向阻湿性聚乳酸膜在高湿度（95%RH）环境下放置一段时间后（图2），表现出较强的水分吸附能力，前4天，对水分的吸附速率较大；10天时，对水分的吸附基本达到饱和。随后将水分吸附饱和的抗菌和单向阻湿性聚乳酸膜置于低湿度（45%RH）环境下，则表现出一定的水分释放能力，其中前24h的水分释放速率较快。
Claims (5)
1.一种具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法，其特征在于，步骤如下：
（1）将聚乳酸溶于三氯甲烷中，加入甘油作为增塑剂，搅拌使其完全溶解，超声脱气，得到聚乳酸溶液，然后将其倒入玻璃板中，放入通风橱内，室温下晾干，得到聚乳酸膜层；
（2）称取明胶分散于水中，搅拌加热到70℃使其充分溶解后，冷却至40℃后，加入单宁酸和三氯化铁，采用NaOH调节溶液pH值至7-8，并在40℃下继续搅拌5min，形成凝胶溶液；向凝胶溶液中加入硝酸银，40℃下搅拌，得到抗菌明胶凝胶溶液；
（3）将步骤（2）中的抗菌明胶凝胶溶液倒于步骤（1）聚乳酸膜层表面上，真空干燥后揭膜，即得到具有抗菌和单向阻湿性聚乳酸膜。
2.根据权利要求1所述的具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法，其特征在于：步骤（1）每100mL三氯甲烷中聚乳酸的添加量为2-4g，甘油的添加量为0.6-1.2g。
3.根据权利要求1所述的具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法，其特征在于：步骤（2）每100mL水中明胶的添加量为2-4g，单宁酸的添加量为2-6mg，三氯化铁的添加量为1-3mg，硝酸银的添加量为0.1-0.2g。
4.根据权利要求1所述的具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法，其特征在于：步骤（2）中40℃下搅拌时间为30min-120min。
5.根据权利要求1所述的具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法，其特征在于：步骤（3）中的真空干燥温度为30-45℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174334.5A CN114479148A (zh) | 2022-02-25 | 2022-02-25 | 具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174334.5A CN114479148A (zh) | 2022-02-25 | 2022-02-25 | 具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114479148A true CN114479148A (zh) | 2022-05-13 |
Family
ID=81483614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210174334.5A Pending CN114479148A (zh) | 2022-02-25 | 2022-02-25 | 具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114479148A (zh) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115282327A (zh) * | 2022-08-16 | 2022-11-04 | 北京化工大学常州先进材料研究院 | 一种湿性抗菌敷料 |
| CN115487346A (zh) * | 2022-09-13 | 2022-12-20 | 浙江大学 | 一种单宁酸改性的明胶基水凝胶伤口敷料及其制备方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007016091A (ja) * | 2005-07-06 | 2007-01-25 | Toray Ind Inc | ポリ乳酸フィルム |
| CN110665051A (zh) * | 2019-10-23 | 2020-01-10 | 四川大学 | 一种具有止血和抗菌性的冷冻凝胶支架的制备方法 |
| CN111588900A (zh) * | 2020-05-21 | 2020-08-28 | 东华大学 | 皮肤敷料用防水透气高弹自修复双层纳米纤维膜及其制法 |
-
2022
- 2022-02-25 CN CN202210174334.5A patent/CN114479148A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007016091A (ja) * | 2005-07-06 | 2007-01-25 | Toray Ind Inc | ポリ乳酸フィルム |
| CN110665051A (zh) * | 2019-10-23 | 2020-01-10 | 四川大学 | 一种具有止血和抗菌性的冷冻凝胶支架的制备方法 |
| CN111588900A (zh) * | 2020-05-21 | 2020-08-28 | 东华大学 | 皮肤敷料用防水透气高弹自修复双层纳米纤维膜及其制法 |
Non-Patent Citations (1)
| Title |
|---|
| KA-YEON LEE等: ""Preparation and Characterization of an Olive Flounder (Paralichthys olivaceus) Skin Gelatin and Polylactic Acid Bilayer Film"", 《JOURNAL OF FOOD SCIENCE》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115282327A (zh) * | 2022-08-16 | 2022-11-04 | 北京化工大学常州先进材料研究院 | 一种湿性抗菌敷料 |
| CN115282327B (zh) * | 2022-08-16 | 2023-11-10 | 常州华联医疗器械集团股份有限公司 | 一种湿性抗菌敷料 |
| CN115487346A (zh) * | 2022-09-13 | 2022-12-20 | 浙江大学 | 一种单宁酸改性的明胶基水凝胶伤口敷料及其制备方法 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114479148A (zh) | 具有抗菌和单向阻湿性聚乳酸食品包装膜的制备方法 | |
| CN112553786A (zh) | 一种抗菌复合纤维膜及其制备方法和应用 | |
| Chang et al. | Physicochemical and antimicrobial properties of chitosan composite films incorporated with glycerol monolaurate and nano-TiO2 | |
| Deng et al. | Development, characterization, and validation of chitosan adsorbed cellulose nanofiber (CNF) films as water resistant and antibacterial food contact packaging | |
| Deng et al. | Overview of renewable polysaccharide-based composites for biodegradable food packaging applications | |
| Kanjanamosit et al. | Biosynthesis and characterization of bacteria cellulose–alginate film | |
| Xie et al. | Hydroxyl crosslinking reinforced bagasse cellulose/polyvinyl alcohol composite films as biodegradable packaging | |
| Zhang et al. | Ag@ MOF-loaded p-coumaric acid modified chitosan/chitosan nanoparticle and polyvinyl alcohol/starch bilayer films for food packing applications | |
| Yun et al. | Preparation of chitosan/polyvinyl alcohol blended films containing sulfosuccinic acid as the crosslinking agent using UV curing process | |
| CN113292753B (zh) | 一种缓控释抗菌性壳聚糖基复合膜的制备方法及其应用 | |
| CN115093614B (zh) | 一种保护型淀粉基膜及其制备方法与应用 | |
| Wang et al. | Preparation, characterization and food packaging application of nano ZnO@ Xylan/quaternized xylan/polyvinyl alcohol composite films | |
| Ooi et al. | Properties of the crosslinked plasticized biodegradable poly (vinyl alcohol)/rambutan skin waste flour blends | |
| Xu et al. | Properties of soy protein isolate/nano‐silica films and their applications in the preservation of Flammulina velutipes | |
| Ji et al. | Effect of chitosan on the antibacterial and physical properties of corn starch nanocomposite films | |
| CN101565482B (zh) | 聚乙烯醇基涂膜保鲜包装新材料及制备工艺 | |
| CN112940311A (zh) | 一种基于玉米淀粉交联改性膜的制备方法 | |
| Saedi et al. | Green seaweed (Ulva ohnoi) as a new eco-friendly source for preparing transparent and functional regenerated cellulose composite films | |
| CN109679123B (zh) | 一种双交联壳聚糖膜的制备方法 | |
| Wang et al. | Development of bio-based PLA/cellulose antibacterial packaging and its application for the storage of shiitake mushroom | |
| CN111378261A (zh) | 一次性餐盒的加工方法 | |
| Zhang et al. | Biodegradable packaging films with ε-polylysine/ZIF-L composites | |
| Pan et al. | Cellulose-based films reinforced by in-situ generated ZnO for antimicrobial packaging | |
| ÇAKICI | Preparation and characterization of biocompatible membranes based on TiO2 nanoparticul | |
| Chen et al. | Development of active poly (butylene adipate‐co‐terephthalate) films incorporated with sodium benzoate and its application in white mushroom (Agaricus bisporus) packaging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |