Lub hauv paus ntsiab lus ntawm kev hloov xim thiab cov qauv ntawm reversible thermochromic pigments:
Thermochromic pigment yog ib hom microcapsules uas hloov xim ntau zaus nrog kub nce lossis poob.
Lub reversible thermochromic pigment yog npaj los ntawm ib tug electron hloov hom organic compound system.Electron hloov hom organic compound yog ib hom organic coloring system nrog cov qauv tshuaj tshwj xeeb.Ntawm qhov kub thiab txias, cov qauv molecular ntawm cov organic tshuaj hloov pauv vim hloov hluav taws xob, yog li paub txog kev hloov xim.Cov tshuaj hloov xim no tsis yog tsuas yog ci xim xwb, tab sis kuj tuaj yeem paub cov xim hloov ntawm lub xeev ntawm "xim === colorless" thiab "colourless === colored".Nws yog ib tug hnyav hlau complex ntsev complex hom thiab kua siv lead ua hom reversible kub hloov dab tsi cov tshuaj tsis muaj.
Lub microencapsulated reversible thermochromic tshuaj hu ua reversible thermochromic pigment (feem ntau hu ua: thermochromic pigment, thermopowder los yog thermochromic hmoov).Cov xim ntawm cov xim no yog spherical, nrog qhov nruab nrab txoj kab uas hla ntawm 2 mus rau 7 microns (ib micron yog sib npaug rau ib txhiab ntawm ib millimeter).Sab hauv yog cov khoom tsis muaj xim, thiab sab nraud yog lub plhaub pob tshab txog 0.2 ~ 0.5 microns tuab uas tsis yaj lossis yaj.Nws yog nws uas tiv thaiv cov tshuaj discoloration los ntawm yaig ntawm lwm yam tshuaj.Yog li ntawd, nws yog ib qho tseem ceeb heev kom tsis txhob ua puas lub plhaub no thaum siv.
Xim hloov kub ntawm thermochromic pigment
1. Qhov kub thiab txias hloov xim kub
Qhov tseeb, kev hloov xim kub ntawm cov xim thermochromic pigments tsis yog qhov kub thiab txias, tab sis qhov kub thiab txias, uas yog, qhov kub thiab txias (T0 ~ T1) suav nrog txij thaum pib hloov xim mus rau qhov kawg ntawm cov xim hloov.Qhov dav ntawm qhov npau taws noature range feem ntau yog 4 ~ 6℃.Qee yam uas muaj qhov tseeb ntawm qhov tsis muaj xim ntau dua (ntau ntau yam sib txawv, qhia los ntawm "N") muaj qhov qis qis qis, tsuas yog 2 ~ 3.℃.
Feem ntau, peb txhais tau qhov kub thiab txias T1 sib haum rau qhov ua tiav ntawm cov xim hloov thaum lub sij hawm qhov kub thiab txias txheej txheem raws li cov xim hloov kub ntawm cov xim thermochromic.
2. Lub voj voog lub sij hawm ntawm qhov kub thiab txias hloov xim:
Siv ib qho me me ntawm cov xim hloov xim, sib tov nrog 504 epoxy kua nplaum, txhuam cov qauv (thickness 0.05-0.08 mm) ntawm daim ntawv dawb thiab cia nws sawv ntawm chav tsev kub siab tshaj 20 ° C rau ib hnub.Txiav ib daim ntawv 10 × 30 mm.Noj ob 600 mL beakrs thiab sau lawv nrog dej.Cov dej kub yog 5 ~ 20℃saum toj kawg nkaus txwv (T1) ntawm cov xim hloov kub ntawm cov qauv kuaj thiab tsis pub tsawg tshaj 5℃qis dua qhov txwv (T0).(Rau RF-65 series number case, dej kub yog teem li T0 = 35℃T1 = 70℃.), thiab khaws cov dej kub.Cov qauv yog immersed nyob rau hauv ob beakers nyob rau hauv lem, thiab lub sij hawm ua kom tiav txhua lub voj voog yog 3 mus rau 4 vib nas this.Saib xyuas cov xim hloov thiab sau cov xim rov qab ntawm lub voj voog tus lej (feem ntau, xim hloov lub voj voog number ntawm thermal decolorization series yog ntau dua 4000-8000 zaug).
Cov xwm txheej ntawm kev siv cov xim thermochromic:
Cov xim thim rov qab thermochromic nws tus kheej yog qhov tsis ruaj khov (kev ruaj ntseg yog qhov nyuaj rau kev hloov), yog li nws lub teeb tsis kam, kub tsis kam, kev laus tsis kam thiab lwm yam khoom tsis zoo rau cov pigments zoo tib yam, thiab yuav tsum tau them nyiaj rau kev siv.
1. Lub teeb tsis kam:
Thermochromic pigments muaj lub teeb tsis zoo thiab yuav ploj sai sai thiab ua tsis tau raws li lub hnub ci muaj zog, yog li lawv tsuas yog siv rau sab hauv tsev.Tsis txhob muaj lub hnub ci muaj zog thiab ultraviolet lub teeb, uas yuav pab kom ntev lub neej ntawm cov xim hloov xim.
2. Thaum tshav kub kub tsis kam:
Cov xim thermochromic tuaj yeem tiv taus kub ntawm 230℃nyob rau hauv ib lub sij hawm luv luv (kwv yees li 10 feeb), thiab tuaj yeem siv rau kev txhaj tshuaj molding thiab kub curing.Txawm li cas los xij, thermal stability ntawm cov xim hloov xim yog txawv ntawm cov xim-txhim kho lub xeev thiab lub xeev achromatic, thiab kev ruaj ntseg ntawm yav dhau los yog siab dua qhov tom kawg.Tsis tas li ntawd, thaum qhov kub siab tshaj 80 ° C, cov organic teeb meem ua rau lub cev tsis muaj xim yuav pib degrade.Yog li, cov xim hloov xim yuav tsum tsis txhob ua haujlwm ntev ntawm qhov kub siab tshaj 75 ° C.
Kev khaws cia ntawm thermochromic pigments:
Cov khoom no yuav tsum tau muab cia rau hauv qhov chaw txias, qhuav thiab tsaus ntuj.Txij li thaum qhov ruaj khov ntawm cov xim hloov xim hauv lub xeev cov xim-tsim yog siab dua li hauv lub xeev achromatic, ntau yam uas muaj qhov kub hloov xim yuav tsum tau muab cia rau hauv lub freezer.Raws li cov xwm txheej saum toj no, kev ua tau zoo ntawm ntau hom xim hloov xim tsis tau degraded zoo tom qab 5 xyoo cia.
Post lub sij hawm: Apr-08-2021