Daim ntawv thov ntawm high pressure homogenizer nyob rau hauv carbon nanotubes

Qhia txog luv luv rau lub hauv paus ntsiab lus ntawm homogenizer

Nyob rau hauv qhov kev txiav txim ntawm cov lus taw qhia reciprocating ntawm lub plunger, cov khoom yog thauj mus rau hauv ib qho kev kho-sized valve block, uas yog nyob rau hauv tsis tshua muaj zog compression. Thaum hla dhau qhov kev txwv, nws hits homogenizing valve feem ntiv nplhaib ntawm kev ceev ceev heev. Cov nyhuv cavitation, cov nyhuv kev cuam tshuam thiab kev txav txuam yog tsim tawm kom sib xyaw cov khoom siv agglomerated los tsim kom muaj kev ruaj khov thiab zoo tib yam.

Homogenizing valve ua hauj lwm txheej txheem qauv

Cov nanotubes muaj roj

Carbon nanotubes yog ib yam tshiab ntawm carbon cov khoom. Cov pa roj carbon monoxide nanotubes txheej txheem nyob rau hauv ib daim ntawv zoo nkauj rau ob peb kaum rau txheej coaxial leeg. Lub txheej yog khaws ntawm ib qhov chaw nrug ntawm cov khaubncaws sab nraud povtseg, li ntawm 0.34 nm, thiab txoj kab uas feem ntau yog 2-20 nm.

Carbon nanotubes tau siv dav hauv kev hloov kho yas, micro circuit chips, electrostatic shielding, lithium roj teeb electrodes, etc. rau lawv cov kev ua tau zoo.

Dispersant xaiv:

Surfactants ntawm CNTs feem ntau tshwm hauv cov ntawv nyeem yog NaDDBS, SDS, Triton X-100. Xyaum pom tias cov tebchaw nrog cov muaj ntxhiab pawg muaj kev ruaj khov zoo rau CNTs, muaj peev xwm adsorption muaj peev xwm, thiab zoo dua ntais qis. nyhuv.

Qhov kev xaiv ntawm dispersant tsuas tshuaj:

Rau ntau lub phab ntsa carbon nanotubes nrog loj loj diameter, qhov kev pom zoo tsuas yog 10-15% rau carbon nanotubes, thiab cov nanotubes nanotubes nrog cov me me sab yog 60-70%. Rau ib leeg phab ntsa, qhov hno tshuaj pom zoo yog 100-300. %.

Qhov no piv rau kev siv xwb. Qhov kev xyaw tshuaj muaj kev sib raug zoo nrog kev zoo ntawm raw cov ntaub ntawv. Hauv qhov sim theem, lub dispersion ntawm cov nanotubes yog feem ntau yog npaj los ntawm ultrasonic khoom. Thaum twg tus qauv ntim nce, lub sijhawm ua haujlwm ntawm lub ultrasonic tsis ntev dhau lawm. Ua rau tus tsav thiab ntau lawm. Kev sib tsoo cov cuab yeej tsis tuaj yeem tswj tau qhov kub ntawm qhov hnoos qis, kev tswj cov zwj ceeb yuav tsis raug tswj, thiab nws yog qhov yooj yim ua rau cov khoom sib txawv ntawm cov khoom siv zoo.

Lub tshuab hluav taws xob tshuab muaj zog yog ib qho khoom siv khiav nrawm, uas yuav tsum tau txias hauv kev pub mis thiab kev tso tawm, tuaj yeem tswj tau qhov kub zoo, thiab ua kom sib luag ntawm cov khoom noj. Nws yog qhov zoo tshaj plaws xaiv rau cov nanotube dispersion tsav thiab cov khoom siv tawm khoom.

Cov txheej txheem sim ua:

1. Siv ob-theem homogenization module, cov khoom carbon dispersion valve, sab nraud coil kub sib txawv, chiller kub rau 10 ° C

2. Tom qab muab cov hnoos qis no, muab nws ua nrog rau lub pas bar. Tom qab cov cuab yeej raug ntxuav nrog cov hnyav, pib homogenization lag luam, kho qhov ceev nrawm rau 500 bar, tos 5-10 vib nas this, mam li txuas tus qauv homogenized mus rau beaker. Pib lub voj voog ntawm qhov siab

3. High pressure 1200bar siab siab dispersion ob zaug, them sai sai rau kev tswj kev kub

Kev sim phenomena:

1. Tus qauv pib chiv, cov nanotubes cov dej raug tshem tawm hauv qhov hnyav

2. Tom qab ua cov cuab yeej tas, cov nanotubes cov dej raug pib hauv qhov hnyav, thiab cov viscosity ntawm tus qauv nce.

3. Tom qab kev kho mob siab, kev txo ntawm qhov hnoos qeev yog txo. Tom qab kev kho siab siab ntawm cov kua dej aqueous rov qab ob zaug, cov qauv ntws los ntawm phab ntsa ntawm beaker, tsis pom pom, zoo fluidity, tsis muaj phab ntsa, tsis muaj nag lossis daus.

Raws li qhov kev ntsuam xyuas tau, cov nanotubes yog pib chiv, thiab cov hauv paus hniav yog cov dispersed nyob rau hauv cov tshuaj, lub dispersibility zoo heev tuaj, thiab cov tshuaj yuav stably tso rau ntev ntev tsis muaj delamination.

Electron micrograph ntawm tus neeg saib xyuas tus cwj pwm sib sau ua ke yog sau ua ke: high-pressure homogenization dispersion yog tsim rau kev npaj cov nanotube (phab ntsa / phab ntsa) dispersion. Nws muaj kev haum zoo rau lub zog ntawm slurry, homogenizer, thiab kev ua kom muaj siab tshaj plaws. Tus txheej txheem yog tswj tau thiab yooj yim rau siv nrog lwm cov tshuaj tiv thaiv, uas yog kev xaiv zoo rau kev npaj cov ntaub ntawv tshiab.