Ultrafine aluminium hydroxide hmoov muaj ntau yam haujlwm xws li hluav taws kub, tshem tawm pa luam yeeb thiab sau, thiab tuaj yeem tsim cov teebmeem hluav taws kub synergistic nrog phosphorus thiab lwm yam tshuaj. Nws yog ib qho tseem ceeb tiv thaiv ib puag ncig hluav taws kub hauv cov khoom siv hluav taws xob, tshuaj lom neeg, cable, yas, roj hmab thiab lwm yam lag luam.
Aluminium hydroxide yog hom kev sau inorganic nplaim taws retardant, txhawm rau kom ua tiav cov nplaim taws retardant zoo dua, qhov ntim yuav tsum ntau dua 40% (tag nrho cov nyiaj), qee qhov txawm tias siab txog 60%, tab sis qhov ntim siab tsis tsuas yog cuam tshuam rau cov khoom siv kho tshuab ntawm cov khoom, tab sis kuj ua rau extrusion thiab kev ua haujlwm tsis zoo.
Yog li ntawd, txhawm rau ua kom cov hmoov txhuas hydroxide zoo heev tuaj yeem siv dav hauv cov ntaub ntawv hluav taws kub xws li polyolefin, yuav tsum tau hloov kho qhov chaw ntawm cov hmoov txhuas hydroxide, txhawm rau txhim kho cov khoom siv lub cev thiab tshuaj ntawm qhov chaw, txhim kho cov hmoov txhuas hydroxide zoo heev thiab cov khoom siv substrate, cov organic polymer lossis resin sib xws thiab kev sib kis hauv cov khoom siv organic, txhawm rau txhim kho lub zog kho tshuab ntawm cov khoom siv thiab kev ua tau zoo.
1. Cov khoom hloov kho nto feem ntau siv rau ultrafine aluminium hydroxide
(1) tus neeg sawv cev sib txuas silane
Muaj ntau tshaj ib puas hom silane coupling agents, ntawm cov monolayer - functional group silane coupling agent yog qhov ruaj khov tshaj plaws. Qhov ruaj khov ntawm -functional group silane coupling agent yog nyob nruab nrab ntawm hlau thiab hlau. Ntxiv nrog rau kev txhim kho cov khoom siv kho tshuab ntawm cov khoom, -functional group silane coupling agent kuj tseem tuaj yeem txhim kho cov khoom siv hluav taws xob thiab cov dej noo ntawm cov khoom.
(2) tus neeg sawv cev txuas zirconium
Chav kawm zirconium coupling agent uas muaj zirconium aluminate qis molecular mass ntawm inorganic polymer nyob rau hauv lub ntsiab saw ntawm lub molecule ntawm complexation ntawm ob hom organic ligand subunits, ib tug dentate nrog coupling agent zoo hydroxyl stability, lwm dentate rau coupling agent zoo organic reactions, lub txhuas hydroxide superfine txhuas hydroxide hmoov muaj zoo hloov kho cov teebmeem.
(3) cov roj fatty acids ntau dua thiab lawv cov ntsev
Hauv cov qauv molecular ntawm cov roj fatty acids siab dua thiab lawv cov ntsev, ib kawg yog ib pawg alkyl ntev, thiab lwm qhov kawg yog ib pawg carboxyl thiab nws cov ntsev hlau uas tuaj yeem cuam tshuam nrog cov pab pawg ua haujlwm ntawm cov txhuas hydroxide. Kev kho cov hmoov txhuas hydroxide ultrafine nrog cov roj fatty acid siab thiab nws cov ntsev tuaj yeem txhim kho qhov sib raug zoo ntawm cov hmoov txhuas hydroxide ultrafine thiab polymer molecule, thiab txhim kho cov khoom siv kho tshuab thiab kev ua haujlwm ntawm cov khoom.
(4) cov kua qaub tsis muaj roj
Cov kua qaub tsis muaj roj ntau yog: acrylic acid, methacrylic acid, cinnamic acid, thiab lwm yam. Feem ntau, cov kua qaub muaj zog dua, yooj yim dua los tsim cov ionic bond, yog li xaiv ntau dua: acrylic acid thiab methacrylic acid.
Ntau yam organic acids siv tau ib leeg xwb, kuj siv tau sib xyaw, kho cov alkali hlau ions uas muaj cov hmoov av ultrafine aluminium hydroxide, qhov cuam tshuam zoo dua.
(5) cov khoom siv organosilicon
Macromolecule organosilicon, tseem hu ua silicon roj, yog ib hom polymer uas txuas nrog cov organic pawg ntawm silicon atom los ntawm silicon oxygen bond saw (si-o-si) ua pob txha. Feem ntau siv yog hydrogen-muaj polymethylsiloxane, hydroxyl-terminated polydimethylsiloxane, thiab lwm yam.
2. Cov txheej txheem hloov kho qhov chaw ntawm cov txhuas hydroxide zoo heev
Tam sim no, cov txheej txheem hloov kho qhov chaw ntawm cov hmoov txhuas hydroxide zoo heev feem ntau yog qhuav thiab ntub.
(1) kev hloov kho qhuav
Hauv cov txheej txheem no, cov hmoov txhuas hydroxide uas tau hloov kho kom zoo nkauj yog preheated rau qee qhov kub, thiab cov khoom hloov kho maj mam ntws mus rau hauv cov hmoov txhuas hydroxide ceev ceev, thiab cov khoom raug nres rau kev ntim khoom tom qab cov tshuaj tiv thaiv rau ib lub sijhawm.
Qhov zoo ntawm kev hloov kho qhuav yog qhov tsis tas yuav siv cov khoom siv thiab kev ua haujlwm yooj yim. Qhov tsis zoo yog tias kev siv zog ntawm cov neeg ua haujlwm yog loj, tus nqi txheej hmoov txhuas hydroxide tsawg.
(2) kev hloov pauv ntub
Kev hloov kho ntub dej yog nyob rau hauv cov txheej txheem ntau lawm ntawm ultrafine txhuas hydroxide hmoov, kev tsim cov txhuas hydroxide slurry tom qab lim, ntxuav, lim ncuav mog qab zib ntaus, hauv qee qhov kub ntawm kev ntaus slurry tom qab ntxiv modifier, do rau ib lub sijhawm, lim, ziab thiab ntaus ntim.
Qhov zoo ntawm kev hloov kho ntub yog kev siv zog tsawg, tsis muaj plua plav paug, ua haujlwm tau zoo, muaj cov hmoov txhuas hydroxide ntau, 20-30%, qhov cuam tshuam ntawm kev hloov kho yog siab thiab ruaj khov. Piv nrog kev hloov kho qhuav, kev hloov kho ntub muaj cov txheej txheem ntev dua thiab xav tau cov khoom siv ntau dua. Vim yog qhov zoo ntawm kev hloov kho ntub, nws maj mam hloov txoj kev tsim khoom hloov kho qhuav.
3. Txoj kev ntsuam xyuas ntawm qhov hloov pauv ntawm qhov chaw ntawm ultrafine aluminium hydroxide
(1) kev ntsuas tus nqi nqus roj
Tus nqi nqus roj feem ntau yog siv los ntsuas qhov ntau ntawm cov roj castor xav tau thaum qee qhov ntawm Al (OH) 3 hmoov tsuas yog mus txog qhov saturation infiltration, thiab nws yog siv los piav qhia qhov ntau ntawm cov resin xav tau thaum qee qhov ntawm Al (OH) 3 hmoov tsuas yog mus txog qhov saturation infiltration.
Txoj kev nrhiav pom yog raws li nram no: cov hmoov alumina hydroxide zoo heev raug ntsuas thiab cov qauv qhuav yog li 10g, muab tso rau hauv lub beaker, poob roj castor nrog burette, thiab maj mam sib xyaw nrog lub pas iav kom ua cov roj castor thiab cov qauv sib npaug rau hauv lub pob. Tus nqi ntawm cov roj castor adsorbed ib 100g ntawm txhuas hydroxide tau suav, uas yog, tus nqi nqus roj ntawm cov hmoov ultrafine txhuas hydroxide.
Tom qab hloov kho qhov chaw ntawm cov hmoov txhuas hydroxide, qhov nqus roj yuav hloov pauv mus rau qee qhov. Yog tias cov hmoov txhuas hydroxide ultrafine raug hloov kho nrog tus neeg sawv cev silane coupling, qhov nqus roj yuav txo qis li 10%.
(2) Kev xeem SEM
Lub tshuab hluav taws xob tau kuaj pom cov morphology ntawm cov hmoov txhuas hydroxide zoo heev ua ntej thiab tom qab hloov kho. Qhov kev tawg ntawm cov hmoov hloov kho hauv lub matrix zoo dua li cov khoom tsis hloov kho.
(3) kev xeem FTIR
Fourier infrared spectroscopy (ftir) tau siv los tshuaj xyuas cov pab pawg ntawm cov khoom nto. Piv txwv li, cov ntsiab lus ntawm vinyl - Vi thiab - Si tuaj yeem txiav txim siab los ntawm ir spectra ntawm txhuas hydroxide hmoov nrog kev hloov kho ntawm qhov chaw ntub dej ntawm methyl vinyl silane.
(4) kev txiav txim siab ntawm cov khoom muaj nqis
Cov hmoov txhuas hydroxide uas tau hloov kho thiab tsis tau hloov kho tau siv los sim cov ntsuas cable xws li cov ntsuas oxygen, lub zog tensile thiab elongation thaum tawg. Los ntawm kev sib piv, nws tuaj yeem pom tias cov nplaim taws retardant thiab cov khoom siv kho tshuab ntawm cov khoom hloov kho tau zoo dua.
(5) cov ntsuas kev ua haujlwm
Cov ntsuas kev ua kom ua haujlwm yog ib qho ntsuas los ntsuas qhov cuam tshuam ntawm kev hloov pauv ntawm qhov chaw los ntawm kev ntsuas feem pua ntawm cov txhuas hydroxide ntab rau ntawm qhov chaw ntawm dej rau tag nrho cov txhuas hydroxide tom qab hloov kho. Vim muaj ntau hom kev hloov kho ntawm qhov chaw thiab ntau txoj kev kho mob ntawm cov hmoov txhuas hydroxide ultrafine, qee cov hmoov hloov kho yuav ntab rau ntawm qhov chaw dej thiab qee qhov yuav tog.
Xws li sodium stearate, titanate ntub kev hloov kho, hydrophobic silane qhuav kev hloov kho tom qab ultrafine txhuas hydroxide hmoov, qhov ntsuas kev ua haujlwm tuaj yeem siv los ntsuas qhov hloov kho; Txawm li cas los xij, hydrophilic silane tau hloov kho los ntawm txoj kev qhuav, thiab ultrafine txhuas hydroxide hmoov hloov kho los ntawm silane ntub yuav tog hauv dej, yog li qhov hloov kho tsis tuaj yeem ntsuas los ntawm qhov ntsuas kev ua haujlwm, thiab txoj kev ntsuas qhov tseeb yog infrared spectroscopy.
Lub sijhawm tshaj tawm: Plaub Hlis-24-2020