Nylon 6 surfaces metal (Ni) the preparation of the material that convert film and function research
- source:TECHEN CNC Machining
1 experiment uses raw material nylon 6, heilongjiang saves product of factory of chemical institute experiment; Formic acid, chemistry is simple; Zheng Bingchun, the analysis is simple; Natrium of boracic hydrogen sulfide (NaBH4) , import minute of outfit, the analysis is simple; Chloridize nickel (analysis of NiCl2 · 6H2O) is simple. Above reagent all not farther rarefied. 1.
Method of preparation of 2 film stuff (1) takes 5g nylon 6 deliquescent in 40mL formic acid and 10mL Zheng Bingchun, wait for the chloridize nickel that ration adds after dissolving completely, after 24h of the agitate below room temperature, with shed the mould that extend a law to be on vitreous board, 80 ℃ often are pressed dry hind get NiCl2/ nylon 6 complexing base film, film is deep it is about 80, 90 μ M. (2) falls in constant temperature, niCl2/ nylon 6 complexing base velar immerge is certain in aqueous solution of pH indicator NaBH4, in a few minutes Ni2+ by reductive for metallic nickel, in nylon 6 surfaces build the nickel layer that has metallic burnish, classics bath, dry hind make nylon 6 surfaces metal (Ni) turns velar material. The chemical and reductive process of complexing radical film is implementation nylon the key of 6 surfaces metallization, suffer temperature of reducer chroma, settling time, reducing solution, and the influence of the element such as metallic salt chroma. Adopt change these elements, the nylon that can obtain different face resistor to lead 6 surfaces metal (Ni) turns velar material. 1.
3 function check nylon 6 surfaces metal (the exterior resistor rate that Ni) changes velar material uses ministry mark JB, 903, appearance of resistor of 3 electrode system measures 66 coaxial. Composition of element of velar stuff surface and form appearance analysis use PHI, 5300X ray photoelectron can chart appearance and KYKY, 1000B scanning electron microscope is measured so that CX ray diffraction analyses appearance of diffraction of ray of use APDl0 X to determine. Temperature of velar surface electric heat uses DM, 801A number measures lukewarm watch. 2 results and discuss 2.
The influence NiCl2 chroma that chroma of 1 metal salt leads to exterior resistor is respectively 0.
The NiCl2/ nylon of 7mmol/gpolymer 6 complexing base film is in respectively 0 of 40 ℃ .
In aqueous solution of 4wt ％ NaBH4 after reductive 7min, the metal that gets exterior resistor is led differring (Ni) changes film, its result to see graph L place is shown. Reductive below same condition, if NiCl2/ nylon 6 complexing base the chroma in film is bigger, criterion the exterior resistor rate of metallization film stuff is minorrer. Because be in,this is reducer chroma is enough below big case, the chroma of the Ni2+ in complexing radical film is bigger, base velar surface Ni " distributing close and even, by reductive the Ni grain that go out is more, final show is exterior metal (the exterior resistor rate that Ni) changes velar material falls, conductivity increases. 2.
The influence NiCl2/ nylon that 2 the reproducibility conditions lead to exterior resistor 6 complexing base the Ni2+ of velar surface is easy by strong reducer NaBH4 reductive into metallic nickel, the bulk that its surface resistor leads besides be concerned with metallic salt chroma, still concern with the reproducibility conditions. Say commonly, of temperature of the extension as settling time, reductive bath elevatory, and reducer pH indicator is increased, will make nylon 6 surfaces metal (the exterior resistor rate that Ni) changes velar material is reduced, conductivity increases. Graph 2 reach for chroma of different metal salt in 40 ℃ , 0.
Below the reproducibility conditions of aqueous solution of 4wt ％ NaBH4, the change of settling time is right nylon 6 surfaces metal (the experimental result that Ni) turns velar stuff resistance to lead an impact. The result makes clear, increase settling time to be able to make the exterior resistor rate of velar stuff falls, after settling time exceeds 6min, not big to influence of exterior resistor rate, below same settling time, chroma of the NiCl2 in complexing radical film is big, exterior resistor rate is minor. NextpageNiCl2/ nylon 6 complexing base the oxidation of film and NaBH4 aqueous solution is reductive reaction is process of reaction of interface of fluid of a solid, can express with next type, namely ion of the metal in combinative radical film diffuses to velar surface below the polarity action of water, very fast by reducer reductive into Ni, conglutinate is in nylon the surface of 6 film. As the extension of settling time, have more Ni2+ on one hand by in the layer diffuses to the interface; On the other hand. Also more reducer elements permeate velar lining, make Ni2+ complete, almost complete perhaps reductive into Ni, and in nylon 6 surfaces form relatively compact metallization, make the exterior resistor rate of velar stuff falls. When settling time lengthens some to be worth. As a result of the reason of chroma gradient, the element of reducer of migratory meeting block up in juice of generated child Xiang Rong to velar lining permeate, compact gold change a layer to also be met block up Ni2+ diffuses to the interface, oxidation is reductive reaction tends trends is balanced gradually. Rate of velar surface resistor tends basically constant value. 2.
33a of SEM analysis graph overcomes nylon for every 6 contain 1.
The complexing of 68mmolNiCl2 base film is reductive the following nylon 6 surfaces metal (the scanning electron microscope that Ni) converts film (the result that SEM) observes. See by the graph, generated nickel shows grain shape to pile up in nylon 6 surfaces. The accumulation density of nickel particle depends on the reproducibility conditions is mixed the chroma of the NiCl2 in complexing radical film, behave the difference that leads for exterior resistor finally. Rate of resistor of the velar stuff with nickel particle close together accumulation, surface is minor, the exterior resistor rate with inattentive accumulation is old. Graph 3b is graph of appearance of its section form. Left layer is Ni layer in the graph, ply is about 15, 20 μ M, right layer also is Ni layer, ply has left and right sides of M of 5 one 10 μ only, intermediate layer is nylon 6. Specification of this one result falls in this condition, 6 surfaces nickel changes generated nylon the layer adheres to only only at nylon C of 6 film two sides has one side (base when velar preparation, clingy glass face) metallization compares other one side want a few thicker. 2.
4ESCA analyses a scheme 4 overcome nylon for every 6 contain 1.
The complexing of 9mmolNiCl2 base film is reductive chart of table of the following ESCA. Consult the chart of ESCA standard table of nickel, the 2P3/2 condition of the nickel in the graph 853.
0eV binding energy peak, the 2P1/2 condition with nickel 870.
4eV binding energy peak, it is simple substance nickel certainly. And the state of another kind of price that dotted line place shows nickel, still cannot affirm. Consumed electron can chart analyses nylon 6 surfaces metal (the chemical element composition that Ni) converts film is: Bls3.
29 ％ ; Nls2.
74 ％ ; Ni2P3.
52 ％ ; O1S34.
15 ％ ; C1S56.
30 ％ . Nextpage2.
5X ray diffraction is analysed and report is calorific function pursues 5 for nylon 6 surfaces metal (the X ray diffraction that Ni) converts film pursues. 2 θ are equal to 28 for nylon the diffractive peak of 6, 2 θ are 52.
4 ° are the diffractive peak of Ni. Graph 6 for nylon 6 surfaces metal (the phone that Ni) converts film is calorific the experimental result of temperature and weld time. Below 30V volts d.c. , after electrify 5min, velar surface temperature rises 30 ℃ by 17 ℃ , after passing 35min again, stability of velar surface temperature is in 40 ℃ . 2.
6 surfaces nickel changes 6 nylon the electric model nylon of velar stuff 6 material itself is a kind of dielectric. To material of fill electric high polymer, because a kind of network is formed between grain of filling of the conductivity in dielectric,the sharp change that dielectric change is electric system is  . Nylon 6 surfaces metal (the telex that Ni) turns velar material guides, it is pile up as a result of nickel grain and form electric catenary be caused by. Although nickel grain dispute is close together,pile up, but grain can be contacted and always partial nickel forms channel of chain certificate electric conduction, make nylon 6 material become semiconductor or conductor by dielectric, model of its electric conduction sees the graph is shown 7 times. Accordingly, content of the NiCl2 in complexing radical film is bigger, reductive reaction undertakes more completely, criterion the nickel grain that velar surface makes is more. So formation electric network is secretter, electric passageway is more, obtains nylon 6 surfaces metal (the resistor rate that Ni) changes velar material is minorrer, already was confirmed at this o'clock by experimental result place. CNC Milling CNC Machining