THEEM HLOOV COV NTAUB NTAWV (PCMS) tuaj yeem faib ua ob peb pawg raws li lawv cov yam ntxwv hloov pauv, txhua tus nrog kev thov tshwj xeeb thiab kev txwv. Cov ntaub ntawv no feem ntau suav nrog cov organic pcms, inorganic PCMS, Bio raws PCMS, thiab PCMs). Hauv qab no yog cov lus qhia ntxaws ntxaws rau cov yam ntxwv ntawm txhua hom theem hloov pauv khoom:
1. Organic theem hloov cov ntaub ntawv
Organic theem hloov cov khoom siv tsuas yog muaj ob hom: paffin thiab fatty acids.
-Qhov:
-Features: Kev siv tshuaj xyuas siab ruaj khov, zoo rov qab, thiab kev hloov kho yooj yim, thiab kho tau yooj yim ntawm melting taw tes los ntawm kev hloov ntev ntawm molecular chains.
-Disadvantage: Lub thermal conductivity yog tsawg, thiab nws yuav tsim nyog ntxiv thermal cov ntaub ntawv kho kom ceev.
-Fatty acids:
-Fe tech: nws muaj cov cua sov siab dua li paraffin thiab qhov pom kev zoo meltings, haum rau ntau yam kev xav tau.
-DisAdvantages: qee cov fatty acids yuav yauv kis ntu thiab tseem kim dua li paraffin.
2. Inorganic theem hloov pauv
Inorganic theem hloov pauv cov ntaub ntawv muaj xws li cov ntsev ua kom haum thiab cov hlau hlau.
-Sws dej daws:
-Features: Zoo thermal stability, siab tratent tshav kub, thiab nqi tsawg.
-Disadvantages: thaum khov, Delamination yuav tshwm sim thiab nws yog corrosive, uas yuav tsum tau cov ntaub ntawv ntim ntim.
-Metal salts:
-Qhov kev hloov pauv: theem theem kev hloov ntsuas kub, haum rau kev kub-kub thermal zog cia.
-DisAdvantages: kuj tseem muaj teeb meem corrosion thiab kev ua tau zoo yuav tshwm sim vim rov ua dua melting thiab solidification.
3. Biobased theem hloov cov ntaub ntawv
Cov theem them biobased hloov pauv yog cov qauv hloov kho los ntawm xwm lossis synthesized los ntawm biotechnology.
-Features:
-Txhais kev phooj ywg, biodegradable, pub dawb ntawm cov tshuaj muaj teeb meem, tau raws li cov kev xav tau ntawm kev txhim kho kom ruaj khov.
-Nws tuaj yeem muab rho tawm los ntawm cov nroj tsuag lossis tsiaj raw cov ntaub ntawv, xws li roj zaub thiab roj.
-DisAdvantages:
-Qhov kev cuam tshuam nrog cov nqi siab thiab qhov chaw txwv.
-Tus thermal stability thiab thermal conductivity yog qis dua li cov pcms qub, thiab yuav xav tau kev txhawb nqa lossis sau cov khoom siv lossis cov khoom siv hloov chaw.
4. Composite theem hloov pauv
Composite theem hloov cov ntaub ntawv ua ke pcms nrog lwm cov ntaub ntawv (xws li cov ntaub ntawv thermal, cov ntaub ntawv txhawb nqa, thiab lwm yam ntawm cov pcms uas muaj sia nyob.
-Features:
-Yog ua ke nrog siab thermal colority cov ntaub ntawv, cov cua sov teb ceev thiab thermal ruaj khov yuav ua tau zoo heev.
-Cov neeg tuaj yeem ua kom tau raws li cov ntawv thov uas yuav tsum tau ua, xws li txhim kho cov neeg kho tshuab zog lossis txhim kho thermal stability.
-DisAdvantages:
-Cov kev npaj cov txheej txheem yuav ua rau muaj kev yooj yim thiab kim.
-Txoj kev sib txuam nrog cov khoom siv thiab kev ua haujlwm yuav tsum tau ua.
Cov theem hloov pauv txhua tus muaj lawv cov txiaj ntsig tshwj xeeb thiab kev xaiv cov xwm txheej. Cov kev xaiv ntawm cov hom PCM tsim nyog feem ntau yog nyob ntawm cov ntawv thov tshwjxeeb, kev siv nyiaj ib puag ncig, ib puag ncig cov kev xav txog lub neej. Nrog rau qhov tob ntawm kev tshawb fawb thiab kev txhim kho thev naus laus zis, kev txhim kho ntawm theem hloov pauv
Daim ntawv thov tau txais kev cia siab ntxiv nthuav dav ntxiv, tshwj xeeb tshaj yog nyob rau hauv kev tswj hwm hluav taws xob thiab kev tswj kub kub.
Lub Sijhawm Post: Jun-20-2024