Kev daws

Sepiolite yog ib hom pob zeb hauv av nrog fiber ntau daim ntawv, uas yog cov qauv fiber ntau txuas los ntawm polyhedral pore phab ntsa thiab pore channel.Cov qauv fiber ntau muaj txheej txheej txheej, uas yog tsim los ntawm ob txheej ntawm Si-O-Si daim ntawv cog lus txuas nrog silicon oxide tetrahedron thiab octahedron uas muaj magnesium oxide nyob rau hauv nruab nrab, tsim 0.36 nm × 1.06nm honeycomb pore.Sepiolite muaj daim ntawv thov feem ntau xav tausepiolite sib tsoo zeb hmoov rau hauv av rau hauv cov hmoov sepiolite.HCMilling (Guilin Hongcheng) yog cov chaw tsim khoom lag luam sepiolite sib tsoo zeb.Tag nrho cov khoom siv ntawm peb sepiolite sib tsoo zeb cov kab ntau lawm tau siv dav hauv kev ua lag luam.Txais tos kom kawm paub ntau ntxiv hauv online.Cov hauv qab no yog kev qhia txog kev siv cov hmoov sepiolite:

1. Cov khoom ntawm sepiolite

(1) Adsorption zog ntawm sepiolite

Sepiolite yog peb-seem tshwj xeeb qauv nrog loj tshwj xeeb thaj chaw thiab txheej porosity, uas yog grafted los ntawm SiO2 tetrahedron thiab Mg-O octahedron.Kuj tseem muaj ntau cov kua qaub [SiO4] alkaline [MgO6] nyob rau ntawm nws qhov chaw, yog li sepiolite muaj zog adsorption kev ua tau zoo.

Sepiolite siv lead ua qauv muaj peb qhov sib txawv adsorption active chaw chaw:

Thawj yog O atom hauv Si-O tetrahedron;

Qhov thib ob yog dej molecules uas koom tes nrog Mg2 + ntawm ntug ntawm Mg-O octahedron, feem ntau tsim hydrogen bonds nrog lwm yam khoom;

Qhov thib peb yog Si OH daim ntawv cog lus ua ke, uas yog tsim los ntawm kev tawg ntawm silicon oxygen daim ntawv cog lus nyob rau hauv SiO2 tetrahedron thiab tau txais ib qho proton lossis hydrocarbon molecule los them rau qhov tsis muaj peev xwm.Si OH daim ntawv cog lus hauv sepiolite tuaj yeem cuam tshuam nrog cov molecules adsorbed ntawm nws qhov chaw kom ntxiv dag zog rau cov adsorption, thiab tuaj yeem tsim cov ntawv cog lus nrog qee cov organic tshuaj.

(2) Thermal stability ntawm sepiolite

Sepiolite yog cov av nplaum uas tsis muaj zog uas muaj qhov kub thiab txias tsis kam.Thaum lub sij hawm maj mam ua cua sov los ntawm qhov kub thiab txias mus rau qhov kub siab, cov qauv siv lead ua ntawm sepiolite tau dhau los ntawm plaub theem poob:

Thaum qhov kub ntawm sab nraud nce mus txog 100 ℃, cov dej molecules uas sepiolite yuav poob hauv thawj theem yog zeolite dej nyob rau hauv lub qhov hws, thiab qhov poob ntawm cov dej molecules no nce mus txog 11% ntawm tag nrho qhov hnyav ntawm sepiolite.

Thaum qhov kub ntawm sab nraud nce mus txog 130 ℃ txog 300 ℃, sepiolite nyob rau theem ob yuav poob thawj feem ntawm kev sib koom tes dej nrog Mg2 +, uas yog kwv yees li 3% ntawm nws qhov loj.

Thaum qhov kub ntawm sab nraud mus txog 300 ℃ txog 500 ℃, sepiolite nyob rau theem thib peb yuav poob qhov thib ob ntawm kev sib koom ua dej nrog Mg2 +.

Thaum qhov kub ntawm sab nraud nce mus txog 500 ℃, cov dej hauv cov txheej txheem (- OH) ua ke nrog octahedron sab hauv yuav ploj mus rau theem plaub.Cov qauv fiber ntau ntawm sepiolite nyob rau theem no tau raug rhuav tshem tag nrho, yog li cov txheej txheem tsis tuaj yeem thim rov qab.

(3) Corrosion kuj ntawm sepiolite

Sepiolite ib txwm muaj cov kua qaub thiab alkali tsis kam.Thaum nws nyob hauv nruab nrab nrog kev daws pH tus nqi <3 lossis> 10, cov qauv sab hauv ntawm sepiolite yuav raug corroded.Thaum nws nyob nruab nrab ntawm 3-10, sepiolite qhia muaj zog ruaj khov.Nws qhia tau hais tias sepiolite muaj zog acid thiab alkali tsis kam, uas yog ib qho tseem ceeb vim li cas sepiolite yog siv los ua ib tug inorganic core los npaj Maya xws li xiav pigment.

(4) Catalytic zog ntawm sepiolite

Sepiolite yog ib qho pheej yig thiab siv tau zoo heev catalyst cab kuj.Qhov laj thawj tseem ceeb yog tias sepiolite tuaj yeem tau txais qhov tshwj xeeb ntawm thaj chaw siab dua thiab nws tus kheej cov txheej txheem ntxeem tau tom qab hloov cov kua qaub, uas yog qhov zoo rau kev siv sepiolite ua catalyst cab kuj.Sepiolite tuaj yeem siv los ua tus nqa khoom los tsim cov photocatalyst nrog kev ua haujlwm zoo catalytic nrog TiO2, uas yog siv dav hauv hydrogenation, oxidation, denitrification, desulfurization, thiab lwm yam.

(5) ion pauv ntawm sepiolite

Txoj kev sib pauv ion siv lwm cov hlau cations nrog cov polarization muaj zog los hloov Mg2 + thaum kawg ntawm octahedron hauv cov qauv sepiolite, yog li hloov nws cov txheej txheem sib nrug thiab deg acidity, thiab txhim kho cov adsorption kev ua tau zoo ntawm sepiolite.Cov hlau ions ntawm sepiolite yog tswj hwm los ntawm magnesium ions, nrog ib qho me me ntawm txhuas ions thiab ib qho me me ntawm lwm cov cations.Qhov tshwj xeeb muaj pes tsawg leeg thiab cov qauv ntawm sepiolite ua rau nws yooj yim rau cations hauv nws cov qauv los pauv nrog lwm cov cations.

(6) Rheological zog ntawm sepiolite

Sepiolite nws tus kheej yog ib lub pas nrig zoo nkauj, tab sis feem ntau ntawm lawv tau muab tso rau hauv cov pob khoom nrog qhov tsis sib xws.Thaum sepiolite yaj nyob rau hauv dej los yog lwm yam polar solvents, cov bundles yuav sai sai disperse thiab intermingle tsis sib haum xeeb los tsim ib tug complex fiber network nrog irregular solvent retention.Cov ntaub ntawv network no tsim cov kev ncua nrog lub zog rheology thiab siab viscosity, uas qhia cov cim rheological ntawm sepiolite.

Tsis tas li ntawd, sepiolite kuj muaj cov yam ntxwv ntawm kev rwb thaiv tsev, decolorization, nplaim taws retardancy thiab expansibility, uas muaj txiaj ntsig zoo hauv kev lag luam.

2. Kev siv tseem ceeb ntawm Sepiolitehmoov txheej txheem los ntawmSepiolitesib tsoo zeb

Nrog rau txoj kev loj hlob sai ntawm Tuam Tshoj txoj kev lag luam, kev lag luam xav tau rau ib puag ncig-phooj ywg, cov khoom muaj nqis ntxiv yog loj hlob.Sepiolite yog ib yam khoom siv tsis zoo nrog kev ruaj ntseg zoo vim nws cov qauv siv lead ua tshwj xeeb, uas tsis muaj kuab paug, ib puag ncig zoo thiab pheej yig.Tom qab ua tiav los ntawm kev sib tsoo tshuab, nws tuaj yeem siv dav hauv ntau yam kev lag luam, xws li architecture, ceramic technology, catalyst npaj, pigment synthesis, roj av refining, kev tiv thaiv ib puag ncig, plastics, thiab lwm yam., uas muaj kev cuam tshuam loj rau Tuam Tshoj txoj kev lag luam. kev loj hlob.Nyob rau tib lub sijhawm, tib neeg tau pib them nyiaj ntau dua rau cov ntawv thov tshiab thiab thev naus laus zis txhim kho ntawm sepiolite, thiab ua kom muaj kev tsim kho ntawm cov saw hlau sepiolite kev lag luam kom daws tau qhov tsis txaus ntawm sepiolite tam sim no hauv kev ua lag luam qis ntxiv ntawm cov khoom lag luam.