CN104194182A

CN104194182A - PVC/PVC-g-DMC antibacterial plastic and preparation technology thereof

Info

Publication number: CN104194182A
Application number: CN201410348600.7A
Authority: CN
Inventors: 李青山
Original assignee: BEIJING SENYUAN HUACHENG TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: BEIJING SENYUAN HUACHENG TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2014-07-22
Filing date: 2014-07-22
Publication date: 2014-12-10

Abstract

The invention provides a PVC/PVC-g-DMC antibacterial plastic and a preparation technology thereof. The PVC/PVC-g-DMC antibacterial plastic is prepared by the following steps: through a solid-phase suspension method, grafting DMC by using a peroxy initiator, using water as a solvent and using a dispersing agent PVC so as to prepare a PVC-g-DMC high-molecular antibacterial agent, and further preparing the PVC/PVC-g-DMC antibacterial plastic through a physical alloying method. When 10% (wt) of the PVC-g-DMC is added, the tensile strength and the impact strength of the blend are respectively improved by 45.1% and 76.63%, and the mechanical property is remarkably improved. After treatment according to the plastic antibacterial property detection QB/T 2591-2003, the PVC/PVC-g-DMC antibacterial plastic has good antibacterial effects for the escherichia coli, the staphylococcus aureus and the sarcina, and particularly, the sterilizing rate for the escherichia coli and the staphylococcus aureus exceeds 98%.

Description

PVC/PVC-g-DMC antibiotic plastic and technology of preparing thereof

Technical field

The invention belongs to material preparation, plastics chemical field.

Background technology

Along with society and the reach of science, people improve day by day to the demand of material property, and it is also the target that we pursue that product has performance variation, functionalization and high quality.PVC ratio is easier to modification, can greatly improve the defects such as its processing characteristics, resistance toheat, shock resistance, tensile property by chemistry or physical method, and can give new function by introducing the means such as functional group.The object of this patent modification is exactly in order to improve or to overcome the shortcoming of PVC itself and give PVC antibacterial, further widening the range of application of PVC.To make PVC develop into performance resins by resins for universal use by modification, enter engineering plastics and filed of functional, thereby realize plastic engineering and functionalization.

Methacrylic acid acyl-oxygen ethyl-trimethyl salmiac (being called for short DMC) is a kind of cationic monomer of excellent performance, this patent is exactly to utilize the method for solid suspension grafting to make PVC-g-DMC, due to the existence of quaternary ammonium salt group, whole molecule demonstrates cationic property, and thermal characteristics, microtexture and the crystal habit of PVC are all changed to some extent.Quaternary ammonium salt group this large feature that has microbe killing properties in addition, therefore PVC-g-DMC itself is exactly a kind of polymer antibacterial agent.The development and application of polymer antibacterial agent is in a starting stage, and utilizes DMC to prepare antiseptic-germicide report at home substantially in blank.So various performances and function for this novel organic antibacterial agent of research have important researching value.On the other hand, the environmental pollution of this experimental technique is little, and production cost is low, holds out broad prospects for industrial production.

Summary of the invention

1, the preparation of PVC-g-DMC high-molecular anti-bacteria

(1) polyvinyl chloride dehydrochlorination: add the 10%NaOH solution of polyvinyl chloride (PVC) RESINS and 10 times of quality in reflux exchanger, temperature of reaction is 100 DEG C; Reaction times is 2h; Product distilled water wash, until remove all residual alkali, and under vacuum condition, be dried 8h, the product obtaining is erythroid resin (DHPVC).

(2) graft polymerization: the DHPVC of dehydrochlorination, H ₂o (50ml), quaternary ammonium salt and initiator are put into the there-necked flask of 250ml in proportion, the heating of oil bath at a certain temperature.Graft product distilled water wash 3-4 time, removes unreacted DMC and homopolymer thereof.

(3) with after vacuum pump suction filtration, put into 80 DEG C of vacuum chambers and be dried 4 hours, weigh.

2, the preparation of PVC/PVC-g-DMC antibiotic plastic

On two mixing rolls of 160 DEG C, PVC, PVC-g-DMC and mixing thin slice twin-roll machine being refined after evenly of other auxiliary agents are carried and cut, then at 10MPa, 160 DEG C, make sample to be tested through vulcanizing press mold pressing.

3, antibacterial effect test

The anti-microbial property of plastics detects presses the processing of QB/T2591-2003 employing pad pasting, calculates antibiotic plastic and contacts the antibiotic rate after 24h with test bacterium.The antibiotic plastic of preparation has good antibacterial effect to intestinal bacteria, streptococcus aureus and sarcina, especially intestinal bacteria and streptococcus aureus sterilizing rate is exceeded to 98%.

Claims

The preparation of 1.PVC/PVC-g-DMC polymer antibacterial agent and antibiotic plastic, is characterized in that being prepared by invention composition and engineering below: polyvinyl chloride (PVC) RESINS 70-80 part, quaternary ammonium salt 5-20 part, initiator 1-5 part, auxiliary agent 0-10 part.
2. preparation PVC-g-DMC polymer antibacterial agent technique according to claim 1: (1) polyvinyl chloride dehydrochlorination: add the 10%NaOH solution of polyvinyl chloride (PVC) RESINS and 10 times of quality in reflux exchanger, temperature of reaction is 100 DEG C; Reaction times is 2h; Product distilled water wash, until remove all residual alkali, and under vacuum condition, be dried 8h, the product obtaining is erythroid resin (DHPVC); (2) graft polymerization: the DHPVC of dehydrochlorination, H ₂o (50ml), quaternary ammonium salt and initiator are put into the there-necked flask of 250ml in proportion, the heating of oil bath at a certain temperature.Graft product distilled water wash 3-4 time, removes unreacted DMC and homopolymer thereof; (3) with after vacuum pump suction filtration, put into 80 DEG C of vacuum chambers and be dried 4 hours, weigh.
3. the technique of PVC/PVC-g-DMC antibiotic plastic according to claim 1:

On two mixing rolls of 160 DEG C, PVC, PVC-g-DMC and mixing thin slice twin-roll machine being refined after evenly of other auxiliary agents are carried and cut, then at 10MPa, 160 DEG C, make sample to be tested through vulcanizing press mold pressing.
4. polyvinyl chloride resin according to claim 1 is SG-3, SG-4, SG-5 model powder and sticks with paste resin.
5. quaternary ammonium salt according to claim 1 is MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride.
6. initiator according to claim 1 is peroxide initiator, as: BPO, EHP.
7. auxiliary agent according to claim 1 is softening agent, thermo-stabilizer, filler.
8. PVC/PVC-g-DMC high-molecular anti-bacteria plastics according to claim 3 have good mechanical performance and antibacterial effect is good.Intestinal bacteria, streptococcus aureus and sarcina are had to good antibacterial effect, especially intestinal bacteria and streptococcus aureus sterilizing rate are exceeded to 98%.