Taw Qhia Rau Cov Roj Hmab Roj Hmab

1. Txheej txheem cej luam ntawmconductive roj hmab

1.1 Txhais thiab cov yam ntxwv

Cov roj hmab conductive yog cov khoom siv roj hmab tshwj xeeb uas muaj hluav taws xob zoo. Los ntawm kev ntxiv cov khoom siv hluav taws xob (xws li carbon dub, hlau hmoov, thiab lwm yam) rau hauv cov roj hmab matrix, tag nrho cov khoom sib xyaw muaj cov khoom zoo.

Thaum piv rau cov roj hmab ib txwm muaj, cov roj hmab conductive boasts cov yam ntxwv tshwj xeeb hauv qab no:

• Muaj cov zoo conductive zoo. Lub ntim resistivity muaj peev xwm ncav cuag 10-3-10-6 Ω·cm, uas yog txaus rau ntau yam kev siv conductive.
• Nws khaws cov khoom zoo tshaj plaws ntawm cov roj hmab, nrog rau nws lub zog tensile, yooj, thiab tsis kam hnav.
• Nws tuaj yeem ua tiav thaiv hluav taws xob hluav taws xob thiab muaj kev tiv thaiv hluav taws xob zoo heev.
• Antistatic: nres lub zog zoo li qub los ntawm kev tsim thiab tawg.
• Flexible manufacturing txheej txheem uas yooj yim rau kev tsim thiab tsim.
• Tus nqi sib piv me me thiab tsim nyog rau kev siv dav.

1.2 Cov khoom tseem ceeb

1. Roj hmab matrix: silicone, nitrile, ntuj roj hmab, thiab lwm yam.
2. Carbon dub, conductive fiber, hlau hmoov (tooj liab, txhuas, nyiaj, thiab lwm yam), thiab lwm yam yog cov piv txwv ntawm conductive muab tub lim.
3. Cov ntaub ntawv txhawb nqa ntxiv: plasticizer, cross-linking agent, vulcanizing agent, thiab lwm yam.

Txhawm rau kom txaus siab rau ntau yam kev thov, ntau yam ntawm cov roj hmab conductive tuaj yeem ua los ntawm kev sib txawv ntawm hom thiab ntau npaum li cas ntawm cov ntaub ntawv teev saum toj no.

1.3 Cov txheej txheem tsim khoom

• Kev sib xyaw: Muab cov khoom siv hluav taws xob sib txuas, roj hmab matrix, thiab cov khoom siv pabcuam kom huv si.
• Moulding yog txheej txheem ntawm nias lossis extruding sib tov rau hauv cov ntaub ntawv xws li nplooj ntawv, profiles, thiab lwm yam.
• Vulcanization: Txhawm rau txhim kho cov cuab yeej zoo, cov khoom molded tau txais kev kub siab vulcanization thiab kev sib txuas.
• Tom qab ua tiav: Ad hoc theem nrab ua, xws li kev sib txuas, txiav, thiab lwm yam.

2. Kev faib tawm ntawm cov roj hmab conductive

2.1 Classification raws li conductive mechanism

2.1.1 Intrinsic conductivity yam

Thaum superior conductive polymer cov khoom xyaw ncaj qha mus rau hauv cov roj hmab matrix, qhov tshwm sim yog cov roj hmab conductive uas yog intrinsically conductive. Cov khoom siv hauv chav kawm no, uas suav nrog cov khoom siv hluav taws xob zoo li polyphenylene thiab polypyrrole, muaj cov khoom siv hluav taws xob zoo. Los ntawm txoj kev ntawm conjugated daim ntawv cog lus electron leaping conduction, lawv muaj peev xwm ua tiav qhov ntws ntawm tam sim no.

Txawm hais tias hom roj hmab conductive no muaj zog antistatic thiab siab hluav taws xob conductivity, nws cov khoom zoo yog subpar, thiab nws cov kev siv yog txwv.

2.1.2 Doping conductivity yam

Doped conductive roj hmab yog tsim los ntawm kev sib txuas cov khoom siv hluav taws xob rau hauv cov roj hmab matrix thiab siv cov khoom ntim cov khoom siv los ua kom tag nrho cov khoom sib xyaw ua ke. Conductive fillers xws li conductive fiber, hlau hmoov, thiab carbon dub yog nquag siv.

Hom roj hmab no muaj hluav taws xob zoo, kev tswj tau zoo dua, thiab cov khoom siv zoo heev ntawm cov roj hmab. Hom roj hmab conductive no feem ntau siv.

2.1.3 Mixed conductivity yam

Ib tug conductive roj hmab nrog sib xyaw conductivity hom blends doped thiab inherent conductivity hom.

Nws ua kom muaj txiaj ntsig zoo ntawm cov khoom siv hluav taws xob zoo tshaj plaws ntawm cov khoom siv hluav taws xob zoo li qub thiab txhim kho tag nrho cov conductivity nrog qhov sib ntxiv ntawm cov khoom siv hluav taws xob. Hom roj hmab conductive no ua tau zoo tshaj plaws tag nrho thiab muab cov txiaj ntsig ntawm ob qho tib si sab hauv thiab doped conductivity yam.

Daim ntawv thov raug txwv, tus nqi yog kim, thiab cov txheej txheem ntau lawm yog qhov nyuaj.

2.2 Kev faib tawm los ntawm kev muab tub lim

2.2.1 Carbon filling hom

Cov pa roj carbon dub, carbon fiber, graphite, thiab lwm yam khoom siv carbonaceous yog siv los ua cov khoom siv hauv cov roj carbon-raws li cov roj hmab. Cov khoom ntim no yog pheej yig, yooj yim rau kev sib txuas thiab xa tawm, thiab tsis muaj corrosive rau cov roj hmab matrix.

Cov khoom xws li conductive carbon fiber roj hmab thiab conductive carbon dub roj hmab yog piv txwv. Txawm hais tias hom roj hmab conductive no pheej yig thiab zoo tagnrho rau kev siv loj, nws cov khoom siv hluav taws xob feem ntau yog subpar.

2.2.2 Hlau sau hom

Cov hmoov hlau (xws li tooj liab, txhuas, nyiaj, thiab lwm yam) yog siv los ua cov khoom siv hluav taws xob hauv cov hlau uas muaj cov roj hmab uas muaj hlau. Cov khoom siv hluav taws xob zoo heev yog cov khoom siv hlau, uas tuaj yeem ua kom tag nrho cov hluav taws xob conductivity.

Txawm hais tias tus nqi ntawm daim ntawv no ntawm cov roj hmab conductive yog kim thiab cov roj hmab matrix yog corroded sai, nws muaj cov hluav taws xob zoo heev. Conductive tooj liab hmoov roj hmab, conductive silver hmoov roj hmab, thiab lwm yam khoom zoo sib xws yog raug.

2.2.3 Lwm hom filling

Ib feem me me ntawm cov khoom siv roj hmab kuj suav nrog lwm cov khoom siv, xws li cov khoom siv hluav taws xob ceramic, cov khoom siv hluav taws xob, thiab lwm yam, ntxiv rau cov khoom siv raws li cov hlau thiab cov pa roj carbon.

Txhua tus ntawm cov fillers no muaj cov yam ntxwv tshwj xeeb, thiab koj tuaj yeem xaiv qhov zoo tshaj plaws haum rau qhov xav tau ntawm koj daim ntawv thov tshwj xeeb. Txawm li cas los xij, feem ntau, tsis muaj ntau chav rau daim ntawv thov.

3. Cov khoom ntawm cov roj hmab conductive

3.1 Cov khoom siv hluav taws xob

Qhov tseem ceeb tshaj plaws kev ua tau zoo metric rau conductive roj hmab yog conductivity. Cov yam ntxwv hauv qab no feem ntau qhia txog conductivity:

• Volume resistivity yuav ua tau raws li cov kev xav tau ntawm feem ntau ntawm cov kev siv conductive; nws yog feem ntau nyob rau hauv qhov ntau ntawm 10-3-10-6 Ω·cm.
• Surface resistance: Feem ntau tsawg dua 106 Ω, nws tuaj yeem ua tiav tsis muaj hluav taws xob zoo li qub los ntawm kev tsim.
• Cov nyhuv ntawm shielding: Nws muaj peev xwm deflect electromagnetic hluav taws xob zoo, nrog 20-60 dB shielding nyhuv.
• Conductive stability: Lub conductive kev ua tau zoo sib txawv me ntsis nrog variations nyob rau hauv ib puag ncig kub thiab av noo.
• Hom thiab concentration ntawm conductive muab tub lim thiab roj hmab matrix uas tau xaiv los txiav txim qhov hluav taws xob conductivity zoo.

Cov roj hmab conductive tuaj yeem ua kom haum rau ntau yam kev thov uas yuav tsum tau ua los ntawm kev kho cov ntawv qhia thiab cov txheej txheem tsim khoom.

3.2 Mechanical Properties

• Cov roj hmab conductive muaj cov khoom siv zoo heev thiab cov khoom siv hluav taws xob zoo heev.
• Lub zog tensile: feem ntau ntawm 2 thiab 10 MPa, uas txaus siab rau cov txheej txheem kev tsim khoom thiab kev siv.
• Elongation: Feem ntau 100-500%, muaj zog deformation muaj peev xwm thiab yoog raws.
• Hardness: sib txawv raws li qhov xav tau ntawm daim ntawv thov; feem ntau ntog ntawm 30 thiab 90 Shore A.
• Hnav tsis kam: Zoo tshaj rau cov roj hmab tsis tu ncua, tsim nyog rau cov xwm txheej uas xav tau hnav tsis kam.

Qhov zais cia kom lav qhov zoo ntawm cov khoom siv hluav taws xob ntawm cov roj hmab conductive yog kom tswj xyuas qhov tsim nyog ntawm cov qauv thiab cov txheej txheem.

3.3 Environmental adaptability

1. Tsis zoo li cov roj hmab li niaj zaus, cov roj hmab conductive yuav tsum ua raws li cov qauv kev hloov pauv ib puag ncig.
2. Kev tiv thaiv rau qhov kub thiab txias: feem ntau nws tuaj yeem tiv taus qhov kub thiab txias ntawm -40 thiab 150 degree, thiab qee yam khoom tshwj xeeb muaj peev xwm tshaj 60200 degree.
3. Tshuaj tiv thaiv corrosion: Nws tiv taus ntau yam khoom, suav nrog roj, acids, thiab alkalis.
4. Huab cua tsis kam: Lub peev xwm tiv taus kev laus los ntawm ozone, UV hluav taws xob, thiab lwm yam.
5. Nplaim retardancy: Qhov zoo ntawm cov khoom siv ntxiv, xws li cov nplaim hluav taws xob, tuaj yeem txhim kho.

4.Application teb ntawm conductive roj hmab

4.1 Kev lag luam hluav taws xob thiab hluav taws xob

Cov roj hmab conductive yog siv dav hauv kev lag luam hluav taws xob thiab hluav taws xob, feem ntau yog siv rau:

Electromagnetic shielding
Electrostatic tso tawm
Kev sib txuas ua ke
Kov hloov, thiab lwm yam.

xws li cov nyees khawm kov, gaskets hauv av, cov ntsaws ruaj ruaj, thiab lwm yam hauv cov khoom siv hluav taws xob xws li khoos phis tawj, TVs, thiab xov tooj ntawm tes.

4.2 Tub rog thiab aerospace teb

Cov hauv qab no yog qee qhov kev siv tseem ceeb rau kev siv roj hmab hauv aerospace thiab kev lag luam tiv thaiv:

Electromagnetic shielding rau radar thiab cov khoom siv sib txuas lus
Electrostatic tawm thiab tiv thaiv xob laim
Spacecraft foob, thiab lwm yam.

Nws tuaj yeem ua tiav cov qauv tsim nyog hauv kev lag luam aerospace thiab tub rog kev lag luam rau ib puag ncig kev hloov pauv thiab kev cia siab rau kev ua haujlwm.

4.3 Kev kho mob thiab kev noj qab haus huv kev lag luam

Cov roj hmab conductive yog siv dav hauv kev kho mob thiab kev noj qab haus huv, feem ntau yog rau:

Kev tiv thaiv hluav taws xob zoo rau cov khoom siv kho mob
Cov ntaub pua plag hauv pem teb hauv chav ua haujlwm
Conductive qhov chaw ntawm rehabilitation khoom, thiab lwm yam.

Nws nquag siv hauv cov cuab yeej kho mob thiab cov cuab yeej kho mob vim tias nws muaj zog biocompatibility thiab huv.

4.4 Lwm thaj chaw

Ntxiv nrog rau cov ntawv thov tseem ceeb tau hais los saum no, cov roj hmab conductive kuj tau siv dav hauv:

Conductive grounding ntawm cov khoom siv fais fab
Electrostatic tawm thiab EMC tiv thaiv hauv kev lag luam tsheb
Conductive flooring nyob rau hauv lub tsev kho kom zoo nkauj kev lag luam, thiab lwm yam.

5. Txoj kev loj hlob ntawm cov roj hmab conductive

5.1 Daim ntawv thov ntawm cov fillers tshiab

Cov khoom siv hluav taws xob tshiab xws li graphene, carbon nanotubes, conductive polymers, thiab lwm yam yog maj mam ua qhov chaw ntawm cov khoom qub xws li cov hmoov hlau, carbon dub, thiab lwm yam. Cov khoom siv tshiab no tuaj yeem txhim kho kev ua haujlwm ntawm cov roj hmab conductive vim lawv tau txhim kho txhua yam, hluav taws xob, thiab ib puag ncig adaptability.

5.2 Tsim cov qauv sib xyaw

Cov kev thov loj heev ntawm niaj hnub no tsis tuaj yeem txaus siab los ntawm ib qho kev muab tub lim, thiab tau hloov mus rau kev sib xyaw ua ke ntau ntau. Piv txwv li, kev sib xyaw ua ke ntawm cov pa roj carbon nanotubes, carbon dub, graphene, thiab hlau hmoov tuaj yeem siv cov txiaj ntsig sib txawv thiab tsim cov roj hmab zoo dua.

5.3 Muaj nuj nqi kev koom ua ke sib txawv

Txoj kev ntawm kev txhim kho roj hmab conductive yog mus rau kev sib koom ua ke ntawm ntau yam. Ntxiv nrog rau nws qhov tshwj xeeb conductivity, nws kuj muaj cov khoom ntxiv nrog rau kev kho tus kheej, tiv thaiv, thiab yoj nqus. Cov kev xav tau sib txawv ntawm cov khoom siv hluav taws xob niaj hnub tuaj yeem ua tau zoo dua los ntawm hom kev ua haujlwm zoo li no.

5.4 Txhim kho kev ua haujlwm ib puag ncig

Cov roj hmab conductive yog evolving nyob rau hauv cov kev taw qhia ntawm ib puag ncig tiv thaiv thiab degradability nyob rau hauv tandem nrog kev loj hlob ntawm kev paub txog kev tiv thaiv ib puag ncig. Kev txhim kho yav tom ntej hauv cov roj hmab conductive yuav tsom mus rau kev txhim kho cov khoom siv rov ua dua tshiab los ntawm kev siv cov khoom xyaw ecologically tus phooj ywg nyoos thiab cov txheej txheem tsim khoom.