CN115486444B - 一种载银聚合物囊泡的制备方法 - Google Patents
一种载银聚合物囊泡的制备方法 Download PDFInfo
- Publication number
- CN115486444B CN115486444B CN202211152674.4A CN202211152674A CN115486444B CN 115486444 B CN115486444 B CN 115486444B CN 202211152674 A CN202211152674 A CN 202211152674A CN 115486444 B CN115486444 B CN 115486444B
- Authority
- CN
- China
- Prior art keywords
- silver
- chain transfer
- vesicle
- transfer agent
- polymer vesicle
- 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.)
- Active
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 73
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 57
- 239000004332 silver Substances 0.000 title claims abstract description 57
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- -1 silver ions Chemical class 0.000 claims abstract description 24
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 16
- 125000004185 ester group Chemical group 0.000 claims abstract description 14
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 13
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 13
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 238000010668 complexation reaction Methods 0.000 claims abstract description 7
- 238000012674 dispersion polymerization Methods 0.000 claims abstract description 6
- 238000011065 in-situ storage Methods 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 26
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 24
- 239000012986 chain transfer agent Substances 0.000 claims description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 14
- 239000003999 initiator Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 150000003512 tertiary amines Chemical group 0.000 claims description 11
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical group CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 claims description 10
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical group C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 claims description 10
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000012024 dehydrating agents Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000005457 ice water Substances 0.000 claims description 5
- 239000012046 mixed solvent Substances 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 229920001427 mPEG Polymers 0.000 claims description 4
- 239000012966 redox initiator Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- SVYHMICYJHWXIN-UHFFFAOYSA-N 2-[di(propan-2-yl)amino]ethyl 2-methylprop-2-enoate Chemical compound CC(C)N(C(C)C)CCOC(=O)C(C)=C SVYHMICYJHWXIN-UHFFFAOYSA-N 0.000 claims description 3
- ANRPYDCTHDLWGE-UHFFFAOYSA-N 2-hydroxyethyl 2-methylprop-2-enoate;3-oxobutanoic acid Chemical compound CC(=O)CC(O)=O.CC(=C)C(=O)OCCO ANRPYDCTHDLWGE-UHFFFAOYSA-N 0.000 claims description 3
- 229960000549 4-dimethylaminophenol Drugs 0.000 claims description 3
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical group [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- YPCMISLZCVOUJB-UHFFFAOYSA-N 4-cyano-4-methyl-5-phenyl-5-sulfanylidenepentanoic acid Chemical compound OC(=O)CCC(C)(C#N)C(=S)C1=CC=CC=C1 YPCMISLZCVOUJB-UHFFFAOYSA-N 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- 125000002228 disulfide group Chemical group 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims 1
- 238000011068 loading method Methods 0.000 abstract description 8
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 6
- 125000001302 tertiary amino group Chemical group 0.000 abstract 3
- 239000002245 particle Substances 0.000 description 6
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 5
- 239000003242 anti bacterial agent Substances 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 238000003917 TEM image Methods 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 229920000469 amphiphilic block copolymer Polymers 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001338 self-assembly Methods 0.000 description 2
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000035143 Bacterial infection Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 208000022362 bacterial infectious disease Diseases 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P1/00—Disinfectants; Antimicrobial compounds or mixtures thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2438/00—Living radical polymerisation
- C08F2438/03—Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Zoology (AREA)
- General Health & Medical Sciences (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Environmental Sciences (AREA)
- Polymers & Plastics (AREA)
- Agronomy & Crop Science (AREA)
- Dentistry (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Toxicology (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
一种载银聚合物囊泡的制备方法,通过RAFT分散聚合的方法,制备出表面含有β‑酮酸酯基团和叔胺基团的聚合物囊泡,利用银离子与聚合物囊泡膜上β‑酮酸酯基及叔胺基的双重络合作用增加银离子的吸附量,再以聚乙烯吡咯烷酮为还原剂在囊泡膜上原位生成纳米银,得到载银聚合物囊泡。本发明利用银离子与囊泡膜上β‑酮酸酯基及叔胺基的双重络合作用,提高纳米银的负载量,得到高抗菌效果的载银聚合物囊泡。
Description
技术领域
本发明涉及一种载银聚合物囊泡的制备方法,属于生物医用材料技术领域。
背景技术
致病细菌的感染问题一直影响着人类的生命建康,这些病菌在空气、土壤和水中随处可见,且由于大量抗生素的使用使其耐药性越来越强,因此开发不产生耐药性的抗菌剂十分必要。纳米银有破坏细胞膜、损伤DNA、影响微生物细胞的呼吸系统等功能,具有广谱杀菌性,但其极易团聚,限制了其广泛应用,因此通过无机或有机载体制备负载型的纳米银抗菌剂引起了广泛关注。由于无机载体的生物相容性较差,导致其在医学、生物有机体等方面的应用受到了限制,聚合物囊泡的比表面积很大且具有一个空腔结构,是理想的药物载体,对制备纳米抗菌剂来解决细菌的感染问题有重大的生物医用前景。
目前所报道的以聚合物囊泡为载体制备的负载型纳米银抗菌剂,如公开号为CN102432974A的专利所述,所用聚合物囊泡通过传统自组装的方法来制备,首先制备出两亲性嵌段共聚物,然后将其在选择性溶剂中自组装形成聚合物囊泡,其操作步骤比较繁锁,自组装过程中体系的浓度一般小于1wt%,囊泡的制备效率越低,越不利于产品的放大生产,从而限制了其应用。
发明内容
本发明为克服现有技术弊端,提供一种载银聚合物囊泡的制备方法,通过可逆加成-断裂链转移(RAFT)分散聚合的方法制备出表面含有β-酮酸酯基团和叔胺基团的聚合物囊泡,利用银离子与囊泡膜上β-酮酸酯基及叔胺基的双重络合作用,提高纳米银的负载量,得到高抗菌效果的载银聚合物囊泡。
本发明解决其技术问题所采用的技术方案是:
一种载银聚合物囊泡的制备方法,所述制备方法通过RAFT分散聚合的方法,制备出表面含有β-酮酸酯基团和叔胺基团的聚合物囊泡,利用银离子与聚合物囊泡膜上β-酮酸酯基及叔胺基的双重络合作用增加银离子的吸附量,再以聚乙烯吡咯烷酮为还原剂在囊泡膜上原位生成纳米银,得到载银聚合物囊泡,具体包括如下步骤:
a、将2-(二异丙基氨基)甲基丙烯酸乙酯DIPEMA、乙酰乙酸甲基丙烯酸乙二醇酯AEMA、大分子链转移剂、引发剂及溶剂加入到反应瓶中,除氧后密封反应瓶,30-50℃加热反应6-8h后,取出反应瓶放入冰水浴中停止反应,得到聚合物囊泡乳液;
b、将步骤a得到的聚合物囊泡乳液在醇水混合溶剂中稀释后,再加入硝酸银,在室温下搅拌均匀,然后加入还原剂,30-60℃下反应12-24h得到棕色的溶液,离心洗涤除去未负载的银纳米粒子,得到载银聚合物囊泡。
上述载银聚合物囊泡的制备方法,所述步骤a中,按照摩尔比,nDIPEMA+AEMA:n大分子链转移剂:n引发剂=(40-150):1:(1/5-1/3),所述DIPEMA与AEMA的摩尔比为(0.1-10):1,所述聚合物囊泡乳液的固含量为5-50%。
上述载银聚合物囊泡的制备方法,所述步骤a中,所述溶剂为醇和水的混合溶剂,所述醇和水的添加重量比为(1-9):1,所述醇为乙醇或甲醇。
上述载银聚合物囊泡的制备方法,所述大分子链转移剂通过聚氧乙烯单甲醚mPEG与小分子链转移剂反应制备,具体制备过程包括:将mPEG、小分子链转移剂、催化剂和二氯甲烷于容器中搅拌溶解,混合均匀,将脱水剂溶解在二氯甲烷中,并滴加至反应体系中,室温条件下反应72h,过滤后在冰乙醚中沉降三次,真空干燥得到大分子链转移剂。
上述载银聚合物囊泡的制备方法,所述聚氧乙烯单甲醚的分子量为1900、2000和5000中的一种或两种,所述小分子链转移剂为一端含有羧基的二硫酯或三硫酯,所述催化剂为4-二甲氨基吡啶DMAP;所述脱水剂为N,N'-二环己基碳二亚胺DCC,小分子链转移剂与聚氧乙烯单甲醚的摩尔比为(1-5):1,脱水剂与聚氧乙烯单甲醚的摩尔比为(1-5):1,催化剂与小分子链转移剂的摩尔比为(0.05-0.2):1,反应体系固含量为5-20%。
上述载银聚合物囊泡的制备方法,所述小分子链转移剂为4-氰基-4-(硫代苯甲酰)戊酸CPADB、4-氰基-4-[(十二烷基硫烷基硫羰基)硫烷基]戊酸CDPA中的一种。
上述载银聚合物囊泡的制备方法,所述步骤b中,硝酸银与AEMA摩尔比为1:(0.1-10)。
上述载银聚合物囊泡的制备方法,所述还原剂为聚乙烯吡咯烷酮,其分子量为5000-130000,硝酸银与聚乙烯吡咯烷酮的摩尔比为1:(0.001-1)。
上述载银聚合物囊泡的制备方法,所述步骤a中,所述引发剂为热引发剂或氧化还原引发剂,其中热引发剂为偶氮类引发剂,优选偶氮二异丁腈AIBN,氧化还原引发剂优选过硫酸钾/亚硫酸氢钠。
上述载银聚合物囊泡的制备方法,所述步骤a中,所述除氧过程为向反应瓶中通氩气或氮气、抽真空,重复操作三次,或者利用液氮冷冻、抽真空,重复操作三次。
本发明的有益效果是:
本发明采用以可逆加成-断裂链转移(RAFT)分散聚合方法制备的聚合物囊泡为载体,硝酸银为银源,利用银离子与囊泡膜上β-酮酸酯基及叔胺基的双重络合作用增加银离子的吸附量,再以聚乙烯吡咯烷酮为还原剂在囊泡膜上原位生成纳米银,得到抗菌聚合物囊泡,制备过程更简单,载银量高,能够大于7wt%,载银聚合物囊泡上的银纳米粒子无团聚,粒径<20nm。
附图说明
图1为本发明实施例1中制备的聚合物囊泡的透射电镜照片;
图2为实施例1中制备的载银聚合物囊泡的透射电镜照片;
图3为实施例2中制备的负载银纳米粒子和未负载银纳米粒子的囊泡的紫外吸收光谱图;
图4为实施例3中制备的负载银纳米粒子和未负载银纳米粒子的囊泡的粒径表征结果;
图5为实施例4中制备的负载银纳米粒子和未负载银纳米粒子的囊泡的热失重曲线。
具体实施方式
本发明选用可逆加成-断裂链转移(RAFT)分散聚合方法制备聚合物囊泡,选用含有叔胺基团的2-(二异丙基氨基)甲基丙烯酸乙酯(DIPEMA)和含有β-酮酸酯基团的乙酰乙酸甲基丙烯酸乙二醇酯(AEMA)为单体进行共聚反应,得到表面同时含有叔胺基团和β-酮酸酯基团的聚合物囊泡。以硝酸银为银源,利用银离子与囊泡膜上β-酮酸酯基及叔胺基的双重络合作用增加银离子的吸附量。β-酮酸酯基团(-COCH2CO-)中两个相隔三个碳原子的氧原子与银离子络合后可形成六元环稳定结构,稳定的高分子螯合物的形成增加了其与银离子的络合能力;叔胺基团中的氮元素有孤对电子能提供电子,而银离子有空轨道能接受电子,当孤对电子填入空轨道时形成配位键,也可形成络合物。两者与银离子的络合作用相结合,提升了纳米银的负载效率。再以聚乙烯吡咯烷酮为还原剂在囊泡膜上原位生成纳米银,得到载银聚合物囊泡。
制备的聚合物囊泡乳液在负载纳米银之前,用醇水混合溶剂稀释10-30倍,以降低聚合物囊泡的粘度,增大与银离子的接触概率,提高载银量。
下面结合实施例对本发明作进一步说明。
实施例1
步骤a、大分子链转移剂的制备:称取5.70g分子量为1900的mPEG,1.674g CPADB,0.072g DMAP和25mL无水CH2Cl2放入在100mL的圆底烧瓶中搅拌,将0.929g DCC溶于5mL的无水CH2Cl2中,并滴加到上述体系中,反应在室温条件下进行72h,过滤后在冰乙醚中沉降三次,真空干燥得到大分子链转移剂。
步骤b、将步骤a中的产物0.158g(0.000072mol),1.075g DIPEMA(0.00504mol),0.463g AEMA(0.00216mol),0.0048g(0.000018mol)过硫酸钾,0.0018g(0.000018mol)亚硫酸氢钠,4.785g乙醇,2.051g去离子水加入到25mL反应瓶中,在冰水浴条件下通入氩气30min,然后经过三次抽排操作后密封反应瓶,在30℃的水浴锅中反应7h,取出反应瓶放入冰水浴中停止反应,得到mPEG-b-P(DIPEMA-AEAM)聚合物囊泡乳液。所得聚合物囊泡的TEM结果如图1所示,聚合物囊泡的平均粒径在200nm左右。
步骤c、取制备的聚合物囊泡乳液0.15g,加入乙醇水混合溶液稀释至3.0g,并加入0.0015g硝酸银,室温搅拌1h后,加入0.005g聚乙烯吡咯烷酮,然后在40℃的烘箱中反应20h,离心洗涤除去未负载的银纳米粒子,得到载银聚合物囊泡。图2是负载了银纳米粒子的囊泡的透射电镜照片,聚合物囊泡上的黑点为纳米银粒子,银纳米粒子的尺寸约10nm。
实施例2
大分子链转移剂和聚合物囊泡的制备同实施例1步骤a和步骤b。载银聚合物囊泡的制备步骤c:
取制备的聚合物囊泡乳液0.2g,加入乙醇水混合溶液稀释至4.0g,并加入0.004g硝酸银,室温搅拌1h后,加入4g聚乙烯吡咯烷酮,然后在40℃的水浴锅中反应24h,离心洗涤除去未负载的银纳米粒子,得到载银聚合物囊泡。图3是负载银纳米粒子和未负载银纳米粒子的囊泡的紫外吸收光谱图,可以看到负载了银纳米粒子的囊泡在420nm处出现明显的吸收峰。
实施例3
大分子链转移剂和聚合物囊泡的制备同实施例1步骤a和步骤b。载银聚合物囊泡的制备步骤c:
取制备的囊泡乳液0.1g,加入乙醇水混合溶液稀释至2.0g,并加入0.003g硝酸银,室温搅拌2h后,加入0.003g聚乙烯吡咯烷酮,然后在50℃的烘箱中反应20h,离心洗涤除去未负载的银纳米粒子。图4是负载银纳米粒子和未负载银纳米粒子的囊泡的粒径表征结果,负载银纳米粒子后,囊泡的平均粒径从负载前的大约195nm增加到大约210nm,表明囊泡表面负载了银纳米粒子。
实施例4
大分子链转移剂的制备同实施例1步骤a。
步骤b、将步骤a中的产物0.105g,0.717g DIPEMA,0.309g AEMA,0.00263g AIBN,4.497g乙醇,1.927g去离子水加入到25mL反应瓶中,液氮冷冻抽真空,重复三次后封管,在70℃的烘箱中反应7h,取出反应瓶放入冰水浴中停止反应,得到PEG-b-P(DIPEMA-AEMA)聚合物囊泡乳液。
步骤c、取步骤b中的聚合物囊泡乳液0.5g,加入乙醇水混合溶液稀释至10.0g,离心后分散于乙醇水混合溶液中,并加入0.03g硝酸银,室温搅拌2h后,加入0.3g聚乙烯吡咯烷酮,然后在50℃的烘箱中反应24h,离心洗涤除去未负载的银纳米粒子,得到载银聚合物囊泡。图5是负载银纳米粒子和未负载银纳米粒子的囊泡的热失重曲线,可以得到银的负载量为8.7wt%。
抑菌试验:将上述实施例3制备得到的载银聚合物囊泡离心后分散于PBS缓冲溶液中,配制成浓度为0.2%的载银聚合物囊泡溶液,进行大肠杆菌和金黄色葡萄球菌的抑菌实验,大肠杆菌和金黄色葡萄球菌均出现了尺寸约1mm的抑菌环。
Claims (7)
1.一种载银聚合物囊泡的制备方法,其特征在于:所述制备方法通过RAFT分散聚合的方法,制备出表面含有β-酮酸酯基团和叔胺基团的聚合物囊泡,利用银离子与聚合物囊泡膜上β-酮酸酯基及叔胺基的双重络合作用增加银离子的吸附量,再以聚乙烯吡咯烷酮为还原剂在囊泡膜上原位生成纳米银,得到载银聚合物囊泡,具体包括如下步骤:
a、将2-(二异丙基氨基)甲基丙烯酸乙酯DIPEMA、乙酰乙酸甲基丙烯酸乙二醇酯AEMA、大分子链转移剂、引发剂及溶剂加入到反应瓶中,除氧后密封反应瓶,30-50℃加热反应6-8h后,取出反应瓶放入冰水浴中停止反应,得到聚合物囊泡乳液;
b、将步骤a得到的聚合物囊泡乳液在醇水混合溶剂中稀释后,加入硝酸银,在室温下搅拌均匀,然后加入还原剂,30-60℃下反应12-24h得到棕色的溶液,离心洗涤除去未负载的银纳米粒子,得到载银聚合物囊泡;
所述大分子链转移剂通过聚氧乙烯单甲醚mPEG与小分子链转移剂反应制备,具体制备过程包括:将mPEG、小分子链转移剂、催化剂和二氯甲烷于容器中搅拌溶解,混合均匀,将脱水剂溶解在二氯甲烷中,并滴加至反应体系中,室温条件下反应72h,过滤后在冰乙醚中沉降三次,真空干燥得到大分子链转移剂;
所述聚氧乙烯单甲醚的分子量为1900、2000和5000中的一种或两种,所述小分子链转移剂为一端含有羧基的二硫酯或三硫酯,所述催化剂为4-二甲氨基吡啶DMAP;所述脱水剂为N,N'-二环己基碳二亚胺DCC,小分子链转移剂与聚氧乙烯单甲醚的摩尔比为(1-5):1,脱水剂与聚氧乙烯单甲醚的摩尔比为(1-5):1,催化剂与小分子链转移剂的摩尔比为(0.05-0.2):1,反应体系固含量为5-20%;
所述步骤a中,按照摩尔比,nDIPEMA+AEMA:n大分子链转移剂:n引发剂=(40-150):1:(1/5-1/3),所述DIPEMA与AEMA的摩尔比为(0.1-10):1,所述聚合物囊泡乳液的固含量为5-50%;
所述步骤a中,所述溶剂为醇和水的混合溶剂,所述醇和水的添加重量比为(1-9):1,所述醇为乙醇或甲醇。
2.根据权利要求1所述的载银聚合物囊泡的制备方法,其特征在于:所述小分子链转移剂为4-氰基-4-(硫代苯甲酰)戊酸CPADB、4-氰基-4-[(十二烷基硫烷基硫羰基)硫烷基]戊酸CDPA中的一种。
3.根据权利要求2所述的载银聚合物囊泡的制备方法,其特征在于:硝酸银与AEMA摩尔比为1:(0.1-10)。
4.根据权利要求3所述的载银聚合物囊泡的制备方法,其特征在于:所述还原剂为聚乙烯吡咯烷酮,其分子量为5000-130000,硝酸银与聚乙烯吡咯烷酮的摩尔比为1:(0.001-1)。
5.根据权利要求4所述的载银聚合物囊泡的制备方法,其特征在于:所述步骤a中,所述引发剂为热引发剂或氧化还原引发剂,其中热引发剂为偶氮类引发剂。
6.根据权利要求5所述的载银聚合物囊泡的制备方法,其特征在于:所述偶氮类引发剂为偶氮二异丁腈AIBN,氧化还原引发剂为过硫酸钾/亚硫酸氢钠。
7.根据权利要求5所述的载银聚合物囊泡的制备方法,其特征在于:所述步骤a中,所述除氧过程为向反应瓶中通氩气或氮气、抽真空,重复操作三次,或者利用液氮冷冻、抽真空,重复操作三次。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211152674.4A CN115486444B (zh) | 2022-09-21 | 2022-09-21 | 一种载银聚合物囊泡的制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211152674.4A CN115486444B (zh) | 2022-09-21 | 2022-09-21 | 一种载银聚合物囊泡的制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN115486444A CN115486444A (zh) | 2022-12-20 |
CN115486444B true CN115486444B (zh) | 2024-01-30 |
Family
ID=84471037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202211152674.4A Active CN115486444B (zh) | 2022-09-21 | 2022-09-21 | 一种载银聚合物囊泡的制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115486444B (zh) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2080768A1 (en) * | 2008-01-21 | 2009-07-22 | Freie Universität Berlin | Method for studying virus particle release |
CN102091601A (zh) * | 2010-12-24 | 2011-06-15 | 河北省科学院能源研究所 | 一种用于分离饱和与不饱和脂肪酸甲酯的π络合吸附剂的制备方法 |
CN102432974A (zh) * | 2011-09-05 | 2012-05-02 | 同济大学 | 一种表面沉积抗菌纳米银的聚合物囊泡及其制备方法 |
CN104998683A (zh) * | 2015-06-16 | 2015-10-28 | 厦门大学 | 一种纳米贵金属负载聚合物囊泡及其制备方法 |
CN108935513A (zh) * | 2018-07-16 | 2018-12-07 | 西北工业大学 | 一种载银聚(2-氨基乙基丙烯酸酯)抗菌剂及制备方法 |
CN110698618A (zh) * | 2019-10-15 | 2020-01-17 | 陕西师范大学 | 水溶性共聚物固载l-脯氨酸催化剂及其制备方法和应用 |
CN111450058A (zh) * | 2020-04-17 | 2020-07-28 | 于力 | 用于动物伤口杀菌愈合的纳米零价银喷雾的制备及其制备方法 |
CN113336879A (zh) * | 2021-06-23 | 2021-09-03 | 河北省科学院能源研究所 | 一种结构稳定的pH响应性聚合物囊泡的制备方法 |
WO2021253030A2 (en) * | 2020-05-29 | 2021-12-16 | Regents Of The University Of Minnesota | Copolymers for intracellular therapeutic nucleic acid payload delivery |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100136353A1 (en) * | 2007-04-05 | 2010-06-03 | Michael Arnoldus Jacobus Schellekens | Aqueous oligomer / polymer emulsion with cationic functionality |
EP2297259A1 (en) * | 2008-06-30 | 2011-03-23 | DSM IP Assets B.V. | Adhesion to metal surfaces with block copolymers obtained using raft |
-
2022
- 2022-09-21 CN CN202211152674.4A patent/CN115486444B/zh active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2080768A1 (en) * | 2008-01-21 | 2009-07-22 | Freie Universität Berlin | Method for studying virus particle release |
CN102091601A (zh) * | 2010-12-24 | 2011-06-15 | 河北省科学院能源研究所 | 一种用于分离饱和与不饱和脂肪酸甲酯的π络合吸附剂的制备方法 |
CN102432974A (zh) * | 2011-09-05 | 2012-05-02 | 同济大学 | 一种表面沉积抗菌纳米银的聚合物囊泡及其制备方法 |
CN104998683A (zh) * | 2015-06-16 | 2015-10-28 | 厦门大学 | 一种纳米贵金属负载聚合物囊泡及其制备方法 |
CN108935513A (zh) * | 2018-07-16 | 2018-12-07 | 西北工业大学 | 一种载银聚(2-氨基乙基丙烯酸酯)抗菌剂及制备方法 |
CN110698618A (zh) * | 2019-10-15 | 2020-01-17 | 陕西师范大学 | 水溶性共聚物固载l-脯氨酸催化剂及其制备方法和应用 |
CN111450058A (zh) * | 2020-04-17 | 2020-07-28 | 于力 | 用于动物伤口杀菌愈合的纳米零价银喷雾的制备及其制备方法 |
WO2021253030A2 (en) * | 2020-05-29 | 2021-12-16 | Regents Of The University Of Minnesota | Copolymers for intracellular therapeutic nucleic acid payload delivery |
CN113336879A (zh) * | 2021-06-23 | 2021-09-03 | 河北省科学院能源研究所 | 一种结构稳定的pH响应性聚合物囊泡的制备方法 |
Non-Patent Citations (3)
Title |
---|
RAFT-PISA 制备聚合物囊泡及在药物输送领域的应用;牛艳玲 等;化学研究与应用;第33卷(第11期);2096-2103 * |
RAFT聚合在聚合物分子结构设计中的应用;吕飞 等;高分子通报(第10期);28-33 * |
Silver nanoparticles well-dispersed in amine-functionalized, one-pot made vesicles as an effective antibacterial agent;Yuanming Deng etal.;Materials Science and Engineering C(第60期);92-99 * |
Also Published As
Publication number | Publication date |
---|---|
CN115486444A (zh) | 2022-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100393760C (zh) | pH及温度双重敏感性纳米水凝胶及其制备方法 | |
CN103897183B (zh) | 二元碳材料-导电聚合物复合纳米气敏薄膜及其制备方法 | |
CN103283781B (zh) | 一种氧化石墨烯负载纳米氧化锌抗菌剂及制备方法和应用 | |
EP0135842B1 (en) | Preparation of carboxyl-containing polymers | |
CN101731272A (zh) | 一种抗菌纳米银溶胶的制备方法 | |
CN109369941B (zh) | 一种聚乳酸-聚吡咯/银复合抗菌薄膜及其制备方法 | |
AU2020103516A4 (en) | Antistatic, antibacterial, and multifunctional polymer composite material, and preparation method thereof | |
CN107540883A (zh) | 一种羧甲基壳聚糖/氧化石墨烯/聚(n‑异丙基丙烯酰胺)纳米复合水凝胶的制备方法 | |
CN107556677A (zh) | 一种高抗菌性与高耐盐性的高吸水性树脂及其制备方法与应用 | |
CN107522875B (zh) | 银纳米粒子交联的水凝胶、其制备方法及应用 | |
Ding et al. | Preparation and antibacterial activity of copper nanoparticle/halloysite nanotube nanocomposites via reverse atom transfer radical polymerization | |
CN102558412A (zh) | 一种高强度二氧化钛纳米复合水凝胶的制备方法 | |
Singh et al. | Biocatalytic route to ascorbic acid‐modified polymers for free‐radical scavenging | |
CN103194030A (zh) | 一种温度敏感性水凝胶/银纳米复合材料的制备方法 | |
CN109942751B (zh) | 一种塑料抗菌材料的制备方法 | |
CN104177628B (zh) | 一种纳米银复合聚合物抗菌胶束及其制备方法 | |
Mishra et al. | Water soluble graft copolymer (κ-carrageenan-gN-vinyl formamide): Preparation, characterization and application | |
CN115486444B (zh) | 一种载银聚合物囊泡的制备方法 | |
CN111234096A (zh) | 一种葡萄糖响应性聚合物及其制备方法 | |
CN114989345A (zh) | 一种具有自修复功能的抑菌抗氧化水凝胶及其制备方法 | |
CN111345316A (zh) | 一种含过氧化氢银离子的消毒剂及其制备方法 | |
CN113201332B (zh) | 一种绿色荧光碳量子点水凝胶的制备方法 | |
Bazazi et al. | Polysaccharide-based C-dots and polysaccharide/C-dot nanocomposites: Fabrication strategies and applications | |
CN101543758B (zh) | 一种乳液聚合制备纳米抗菌核-壳聚合物微球的方法 | |
CN109232833A (zh) | 一种低细菌粘附、细菌释放并可再生的高强度纳米复合水凝胶的制备方法 |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |