Cyclopentane (C₅H₁₀) yog ib qho tsis yog -polar molecule uas tsis tshua muaj polarity, thaum polyether polyols muaj ntau ntawm polar ether bonds. Qhov sib txawv tseem ceeb nyob rau hauv lawv cov solubility tsis ua rau solubility ntawm cov pa polyethers rau cyclopentane tsuas yog li 10%. Solubility tsis txaus tuaj yeem ua rau stratification ntawm polyol sib xyaw, ua npuas ncauj ua npuas ncauj, nce thermal conductivity, thiab lwm yam teeb meem. Cov kev daws teeb meem suav nrog: xaiv qis-hydroxyl- tus nqi polyethers (hydroxyl tus nqi Tsawg dua lossis sib npaug li 400 mg KOH / g), xws li cov khoom siv roj zaub (solubility tuaj yeem ncav cuag 50 g / 100 g); ntxiv solubilizers lossis xaiv emulsifying silicone roj; thiab siv cov khoom sib xyaw zoo li qub rau kev sib xyaw ua ke. Kev tshawb fawb qhia tau hais tias kev cia ruaj khov ntawm cyclopentane hauv polyol blends zoo dua li ntawm cycloisopentane, uas muaj qhov kub qis dua. Nanjing ZL Energy Co., Ltd. tsom rau kev tsim cov siab -purity cyclopentane (Ntau dua lossis sib npaug rau 99.5%), nrog cov purity siab thiab cov dej noo tsawg, txo qhov cuam tshuam ntawm impurities ntawm kev sib raug zoo los ntawm qhov chaw.
1. Lub ntsiab ntawm cov teeb meem Solubility - Vim li cas Cyclopentane thiab Polyether "Incompatible"?
Lub solubility ntawm cyclopentane nyob rau hauv cov pa polyether polyols yog txwv (kwv yees li 10%), feem ntau yog vim lub polarity sib txawv thiab cov yam ntxwv mismatch ntawm ob.
Cyclopentane (C₅H₁₀) yog ib qho tsis yog -polar molecule nrog cov qauv cyclic, thaum polyether polyols (tshwj xeeb tshaj yog qab zib ethers thiab sorbitol ethers feem ntau siv hauv cov ntawv ua npuas dej khov) muaj ntau pawg hydroxyl (-OH) thiab muab lawv cov nyiaj ntau. Raws li "zoo li dissolves nyiam" lub hauv paus ntsiab lus ntawm solubility, polar polyethers muaj peev xwm dissolving tsawg rau tsis yog -polar cyclopentane.
Cov kev tshawb fawb tshawb fawb tau taw qhia tias "kev daws teeb meem tsis zoo ntawm kev solubility ntawm cyclopentane hauv polyether polyols yog qhov tseem ceeb hauv kev txhim kho daim ntawv thov teb ntawm cyclopentane tshuab tshuab." Cov nqe lus no ncaj qha qhia txog txoj haujlwm tseem ceeb ntawm cov teeb meem solubility hauv kev tsim cov ntawv thov cyclopentane.
Solubility tsis txaus tuaj yeem ua rau theem sib cais ntawm polyol sib xyaw thaum khaws cia thiab siv. Feem ntau, cov pa polyethers (4110, 450) tuaj yeem yaj txog 10% cyclopentane; tshaj qhov no nyuaj dua.
2. Chain Reaction Consequences ntawm Solubility tsis txaus
Kev sib raug zoo tsis zoo ntawm cyclopentane thiab polyether tuaj yeem ua rau muaj teeb meem ntau, suav nrog stratification ntawm polyol blend, ntxhib ua npuas ncauj hlwb, nce thermal conductivity, thiab txo qhov ruaj khov.
| Teeb meem tshwm sim | Mechanism Description | Qhov tshwm sim |
|---|---|---|
| Stratification ntawm polyol blend | Cyclopentane cais tawm ntawm polyether; Qhov sib txawv ntom ntom ua rau stratification | Formulation ratio ua uncontrolled thaum foaming; ua npuas ncauj kev ua tau zoo fluctuates |
| Coarse thiab tsis sib xws ua npuas ncauj cell | Tshuab tshuab yog unevenly dispersed nyob rau hauv lub system | Ntxiv thermal conductivity; txo thermal rwb thaiv tsev kev ua tau zoo |
| Ua npuas ncauj shrinkage | Tsis txaus cell sab hauv siab vim tsis zoo compatibility | Dimensional instability ntawm cov khoom; nce seem seem |
| Shortened cia lub sij hawm | Lub polyol sib tov stratifies tom qab sawv | Tsis tuaj yeem khaws cia ntev -lub sij hawm; xav tau ntawm -xav tau kev sib xyaw |
Kev tshawb fawb qhia tau hais tias lub cyclopentane / polyol blend system yuav tsum ua kom tau zoo sib xws los xyuas kom meej "zoo ua npuas ncauj flowability, tsis muaj nqi, thiab ua npuas ncauj kev ua tau zoo ntsib lub tub yees thiab lub freezer specifications." Hloov pauv, thaum kev sib raug zoo tsis zoo, txawm tias tus nqi cyclopentane tseem tsis hloov pauv, ua npuas dej ua haujlwm yuav pom tseeb tsis zoo.
3. Txoj hauv kev los daws cov teeb meem Solubility ntawm Cyclopentane
Muaj peb txoj hauv kev tseem ceeb los daws cov teeb meem solubility ntawm cyclopentane hauv polyether: polyether structural modification, ntxiv cov solubilizers / additives, thiab optimization ntawm kev sib xyaw ua ke.
3.1 Txoj Kev 1: Kev Hloov Kho Cov Qauv Tshwj Xeeb Polyether
Hom pib thiab hydroxyl tus nqi ntawm polyether muaj kev txiav txim siab ntawm kev solubility ntawm cyclopentane.
Cov kws tshawb fawb tau tsim cov roj zaub-raws li polyether tshwj xeeb rau cyclopentane foaming systems, ua tiav cov solubility ntawm 50 g / 100 g nrog cyclopentane. Nws cov txheej txheem tseem ceeb muaj xws li:
Xaiv sucrose ua tus pib
Qhia txog 22 wt% zaub roj ntu
Hloov cov qauv molecular ntawm polyether polyol kom nce lipophilicity
Kev lag luam kev paub kuj qhia tau hais tias kev tswj hwm tus nqi hydroxyl yog qhov tseem ceeb: polyethers nrog tus nqi hydroxyl qis dua 380 mg KOH / g muaj kev sib raug zoo nrog cyclopentane. "Txoj kev zoo tshaj plaws yog txhawm rau nce cov roj ether thiab txo cov piam thaj ether thiab sorbitol ether" - roj ether muaj cov saw hlau ntev dua thiab qis polarity, muab qhov zoo sib xws nrog cyclopentane ntau dua -functionality polyethers.
3.2 Txoj Kev 2: Ntxiv Solubilizers thiab Silicone Roj
Ntxiv solubilizers lossis xaiv emulsifying silicone roj rau polyether systems uas twb muaj lawm yog lwm txoj kev daws teeb meem.
Muaj cov khoom tshwj xeeb "solubilizer" muaj nyob rau hauv kev ua lag luam - lawv xav tau me me ntxiv, muaj cov txiaj ntsig zoo, thiab pab kom cyclopentane muaj kev sib raug zoo nrog ntau yam polyethers. Silicone roj cov khoom kuj tau raug pov thawj tias muaj zog emulsifying muaj peev xwm, cia cyclopentane polyol blends khaws cia rau lub sij hawm ntev yam tsis muaj stratification.
Zoo solubilizers yuav tsum tsis tsuas yog daws qhov teeb meem solubility tab sis kuj muaj cov haujlwm hauv qab no:
Txo qhov system viscosity
Txo cov thermal conductivity ntawm lub resulting npuas
Txhim kho qhov ua npuas ncauj shrinkage kuj
3.3 Txoj Kev 3: Kev sib xyaw ua kom zoo
Txawm hais tias polyether compatibility tsis zoo tag nrho, foaming zoo tseem tuaj yeem ua kom ntseeg tau los ntawm cov txheej txheem txhais tau tias.
Kev siv cov khoom sib xyaw zoo li qub yog ib qho kev coj ua hauv kev lag luam loj: cov khoom siv qhuav (semi-polyol blend) yog rub mus rau hauv lub tank sib tov, ces cyclopentane tau kos rau hauv, thiab cov sib tov yog homogenized los ntawm nplawm los yog cov khoom zoo li qub hauv lub kaw lus kaw. Qhov kev daws teeb meem no muaj kev sib xyaw ua haujlwm siab thiab cov qauv meej, txo qhov cuam tshuam ntawm cov teeb meem kev sib raug zoo.
4. Solubility Sib piv ntawm txawv Pentane Blowing Agents
Kev ruaj khov ntawm cyclopentane hauv polyol blends yog zoo dua li ntawm cycloisopentane, uas muaj qhov kub kub qis, tab sis nws cov solubility qis dua li ntawm isopentane.
Cov ntaub ntawv technical los ntawm Nanjing ZL Energy Co., Ltd. qhia meej txog qhov sib txawv no:
| Hom Pentane | Boiling Point | Solubility yam ntxwv |
|---|---|---|
| Cyclopentane | 49.3 degree | Solubility nruab nrab, zoo cia stability |
| Cycloisopentane | 27.7℃ib | Solubility tab sis volatilize, tsis zoo cia stability |
| n-Pentane | 36.1 degree | Siab solubility, cia stability ntawm ob |
Nyob rau hauv cov nqe lus ntawm solubility nyob rau hauv polyether, cyclopentane muaj ib tug ntsuas solubility nqi ntawm 10% -20%, thaum isopentane (muaj ceg) muaj ntau dua solubility. Kev taw qhia ntawm isopentane yog ib lub tswv yim zoo los daws cov teeb meem solubility - cyclopentane / isopentane sib xyaw ua ke tau dav siv hauv kev lag luam, tswj xyuas qhov zoo ntawm kev ruaj ntseg ntawm cyclopentane thaum siv isopentane los txhim kho qhov system fluidity thiab compatibility.
5. Kev siv qhov sib piv
Qhov piv ntawm cyclopentane rau polyether sib txawv heev nyob rau hauv txawv daim ntawv thov scenarios. Cov tshuab nrog siab cyclopentane loading yuav tsum tau tsim tshwj xeeb polyether.
| Scenario | Cyclopentane Ntxiv Tus Nqi | Cov yam ntxwv |
|---|---|---|
| Pa system | 10-16 qhov chaw cyclopentane ib 100 qhov chaw polyether | Tsis xav tau polyether tshwj xeeb; Cov pa rigid ua npuas ncauj polyether tuaj yeem siv tau |
| Siab solubility system | 50 g cyclopentane ib 100 g polyether | Yuav tsum tau zaub roj-raws li polyether tshwj xeeb |
Feem ntau, qhov kev faib ua feem ntawm cyclopentane uas cov pa 4110 polyether tuaj yeem yaj yog li 10% (kwv yees rau polyether hnyav). Yog tias xav tau ntau dua, kev sib xyaw ua ke (cyclopentane + isopentane) yog ib qho kev xaiv zoo, ua kom tag nrho pentane dissolution tus nqi, tswj cov nqi, thiab ua kom lub cev fluidity.
6. Chaw tsim tshuaj paus Advantage - Nanjing ZL Energy Co., Ltd.
Nanjing ZL Energy Co., Ltd. muab siab -purity cyclopentane (Ntau dua lossis sib npaug li 99%-99.5%) nrog cov ntsiab lus noo noo tswj ntawm 30-50 ppm, muab cov ntaub ntawv pov thawj rau kev sib raug zoo thiab kev ruaj ntseg ntawm cov txheej txheem foaming.
Xaiv lub siab -purity cyclopentane tus neeg muag khoom yog qhov tseem ceeb sib npaug rau kev daws teeb meem kev sib raug zoo, feem ntau yog vim li cas hauv qab no:
| Qhov xwm txheej | Kev piav qhia |
|---|---|
| Impurity cuam tshuam | Cyclopentane nrog tsis txaus purity tej zaum yuav muaj impurities xws li olefins thiab dej, uas yuav exacerbate compatibility teeb meem nrog polyether. NJ ZL Zog cov khoom muaj purity Ntau dua los yog sib npaug rau 99.5%, nrog nruj tswj cov ntsiab lus impurity. |
| Moisture txaus ntshai | Cov dej noo ntau dhau tuaj yeem ua rau isocyanate sab tshwm sim. NJ ZL Zog tswj cov dej noo tsawg dua los yog sib npaug li 30 ppm, pab kom muaj kev ruaj ntseg. |
| Batch sib xws | NJ ZL Zog siv nyob rau hauv - cov txheej txheem roj chromatography xyuas kom ntseeg tau tias qhov zoo ib yam ntawm txhua qhov cyclopentane batch, ua kom yooj yim zoo - kho cov qauv los ntawm cov neeg siv khoom. |
| Parameter | NJ ZL Zog Khoom Specification |
|---|---|
| Purity | Ntau dua lossis sib npaug li 99% -99.5% |
| Moisture | Tsawg dua lossis sib npaug li 30-50 ppm |
| n-Pentane | Tsawg dua lossis sib npaug li 2.0 ppm |
| Cov ntsiab lus sulfur | Tsawg dua lossis sib npaug li 1 ppm |
| Flash Point | -37 degree |
Nanjing ZL Energy Co., Ltd. tuaj yeem muab cov khoom lag luam ruaj khov cyclopentane rau cov lag luam polyurethane ua npuas ncauj. Cov khoom tsim nyog rau lub tub yees foaming, vaj huam sib luag foaming, yeeb nkab rwb thaiv tsev, thiab ntau yam kev thov scenarios. Lub tuam txhab tseem tuaj yeem muab kev sib tham txog cov kev daws teeb meem sib xyaw pentane (xws li, cyclopentane / isopentane mixing ratios), pab cov neeg siv khoom ua kom zoo dua cov nqi thiab kev ua tau zoo thaum ua kom muaj kev sib raug zoo.
Kev ceeb toom kev nyab xeeb:Cyclopentane yog Class A flammable kua (flash point -37℃). Factories uas siv cyclopentane foaming systems yuav tsum ua kom tiav tawg - pov thawj thiab tiv thaiv zoo li qub retrofitting thiab nruj me ntsis raws li kev ruaj ntseg cov cai.
