Chidule cha zipangizo za thovu la polyurethane: kuyambira pa microstructure mpaka macroscopic performance
Monga chimodzi mwa zipangizo zomwe zimagwiritsidwa ntchito kwambiri masiku ano, kusiyana kwa magwiridwe antchito a thovu la polyurethane kumachokera makamaka ku mapangidwe osiyanasiyana a mapangidwe a ma pore. Ngakhale thovu la cell closed ndi thovu la cell locked lili ndi mankhwala ofanana, limasonyeza makhalidwe osiyana kwambiri chifukwa cha kusiyana kwa kapangidwe ka microstructure, komwe sikungasiyanitsidwe ndi malamulo enieni a polyurethane catalysts.
Chikhalidwe cha thovu lotsekedwa ndichakuti thovu lililonse limazunguliridwa ndi khoma la polima kuti lipange kapangidwe kake kodziyimira pawokha komanso kotsekedwa. Kapangidwe kameneka kamapereka mphamvu yabwino kwambiri yotetezera kutentha (kutentha nthawi zambiri kumakhala 0.018-0.028W/(m·K)) komanso mphamvu yayikulu yamakina (mphamvu yokakamiza imatha kufika 150-500kPa). Thovu lotseguka limagwira ntchito bwino kwambiri (NRC imatha kufika 0.6-0.9) komanso mpweya wolowa (kuchuluka kwa mpweya wozungulira kumapitirira 90%) kudzera mu netiweki yolumikizana ya pore. Kumvetsetsa njira yopangira ndi kusiyana kwa magwiridwe antchito a thovu awiriwa ndikofunikira kwambiri pakusankha bwino machitidwe ofunikira komanso kukonza njira zopangira.
Njira ya mankhwala yopangira kapangidwe ka ma pore ndichothandiziralamulo
Njira yopangira thovu lotsekedwa
Kupangidwa kwa kapangidwe ka maselo otsekedwa ndi njira yofanana yogwirira ntchito, yomwe imadalira kwambiri zinthu zitatu zofunika izi:
1. Kuchuluka kwa mpweya: kumatsimikiziridwa ndi kuchuluka kwa isocyanate ndi madzi (kuchuluka kwa thovu)
2. Kuchuluka kwa kukula kwa mphamvu ya matrix ya polymer: kumatsimikiziridwa ndi kuchuluka kwa zochita za isocyanate ndi polyol (gel reaction)
3. Kukhazikika kwa pamwamba: kumasungidwa ndi mphamvu ya synergistic ya surfactant ndi chothandizira
Pamene liwiro la gel reaction likuyenda mofulumira mokwanira, polymer matrix imatha kupanga filimu ya khoma yamphamvu yokwanira isanafike mphamvu yamkati ya thovu kufika pamtengo wofunikira, motero kusunga ma pores osagwedezeka. Deta yathu yoyesera ikuwonetsa kuti kugwiritsa ntchito njira yapadera yopangira catalyst kungawonjezere kuchuluka kwa maselo otsekedwa kuchokera pa 85% kufika pa 95%, ndipo coefficient ya kutentha imachepetsedwa ndi 15-20% moyenerera.
Mfundo yokonzekera thovu lotseguka
Kupangidwa kwa kapangidwe ka maselo otseguka kumadalira njira yowongolera bwino "kuphulika kwa zenera". Zinthu zotsatirazi zikakwaniritsidwa, khoma la selo lidzaphulika pakapita nthawi kuti lipange kapangidwe ka maselo otseguka:
- Kuyankha kwa gel kumachedwa pang'ono, kotero kuti khoma la selo limakhalabe lofewa panthawi yokulitsa.
- Kuchuluka kwa mpweya wopangidwa ndi mphamvu ya polima kumafika pamlingo woyenera kwambiri
- Kupsinjika kwa pamwamba kumachepetsedwa moyenera pamalo ofunikira
Mwa kusintha chiŵerengero cha amine catalyst ku metal catalyst, titha kuwongolera molondola chiŵerengero cha open-cell mkati mwa 80-98% kuti tikwaniritse zofunikira zosiyanasiyana zogwiritsira ntchito. Mwachitsanzo, ma acoustic foam nthawi zambiri amafunikira chiŵerengero cha open-cell choposa 92%, pomwe zinthu zosefera zingafunike kapangidwe ka maselo otseguka kwathunthu.
Njira yosankha ndi kukonza bwinochothandiziradongosolo
Dongosolo lapadera lothandizira thovu lotsekedwa
Kupanga thovu lotsekedwa bwino kwambiri kumafuna kulinganiza zinthu zitatu zofunika:
1. Kutulutsa thovu (kupanga mpweya): ma catalyst a triethylenediamine (TEDA) monga MXC-102 nthawi zambiri amasankhidwa
2. Gel reaction (mapangidwe a polima): Stannous octoate MXC-T12 series ikulangizidwa
3. Kukonza kutentha (kukana kutentha bwino): Zothandizira zapadera za isocyanurate monga MXC-15
Ma catalyst opangidwa ndi MXC-CF200 omwe tidapanga ndi oyenera kwambiri kugwiritsa ntchito thovu lotsekedwa ndipo ali ndi makhalidwe awa:
- Chiwerengero cha maselo otsekedwa ndi chokhazikika pa 93%
- Kuchuluka kwa kusintha kwa miyeso <1.5% (70℃, 48h)
- Kugwirizana bwino ndi othandizira kuphulika kwa HFO
- Tsatirani miyezo yoteteza moto mumakampani omanga
Yankho lapadera la chothandizira cha thovu lotseguka
Chinsinsi cha kupanga thovu lotseguka m'maselo ndikuchedwetsa kuyankhidwa kwa gel pamene mukuonetsetsa kuti likuchira mokwanira pambuyo pake. Mndandanda wathu wa MXC-OF300 umapereka:
- Ma porosity otseguka olamulidwa bwino (osinthika 85-99%)
- Kulimba mtima kwambiri (kubwerera m'mbuyo kwa mpira > 65%)
- Makhalidwe otsika a fungo (VOC < 50μg/m³)
- Kugwirizana bwino ndi zinthu zoletsa moto
Ndikofunikira kwambiri kuti chothandizira chathu chatsopano cha MXC-OF350 chimakwaniritsa bwino kuwongolera kapangidwe ka maselo otseguka kudzera mu njira yapadera yochepetsera kuyambika, ndikuthetsa bwino vuto la vuto la maselo otsekedwa lomwe limapezeka kwambiri mu thovu lolimba kwambiri.
Zochitika pakukula kwa ukadaulo ndi mayankho atsopano
Ndi malamulo okhwima kwambiri okhudza chilengedwe komanso zosowa zosiyanasiyana zogwiritsira ntchito, ukadaulo wa polyurethane catalyst ukukumana ndi mavuto ndi mwayi watsopano:
1. Dongosolo la thovu lotsekedwa lomwe limatulutsa kutentha kochepa kwambiri:
- Pangani ma catalyst omwe amagwirizana bwino ndi mbadwo watsopano wa othandizira a HFO
- Ukadaulo wa nanocomposite catalytic umathandiza kuti maselo otsekedwa akhale olimba
- Cholinga cha kutentha kwa mpweya: <0.018W/(m·K)
2. Ukadaulo wanzeru wa thovu lotseguka m'maselo:
- Kulamulira kwa ma porosity otseguka a gradient (ma porosity osiyanasiyana m'malo osiyanasiyana)
- Dongosolo lothandizira zachilengedwe
- Chothandizira thovu lotseguka chomwe chimabwezeretsedwanso
3. Mayankho okhazikika a catalytic:
- Kupanga zinthu zoyambitsa matenda pogwiritsa ntchito zinthu zachilengedwe
- Dongosolo lotsika la VOC
- Ukadaulo wothira kutentha kochepa (kusunga mphamvu zoposa 30%)
Thandizo laukadaulo ndi ntchito zaukadaulo
Timapereka chithandizo chaukadaulo chokwanira kwa opanga polyurethane padziko lonse lapansi:
- Utumiki woyesa labu: perekani lipoti loyambirira la mayeso mkati mwa maola 72
- Kukonza mzere wopanga: malangizo aukadaulo pamalopo ndi kusintha kwa njira
- Kupanga mwamakonda: kupanga njira yapadera yothandizira malinga ndi zosowa zapadera
- Maphunziro aukadaulo: Nthawi zonse chititsani misonkhano yaukadaulo wa thovu ndi kugwiritsa ntchito ma catalyst
Kuti mudziwe zambiri zaukadaulo kapena kuti mupemphe kuti muwunikenso zitsanzo zaulere, chonde funsani gulu lathu laukadaulo kudzera m'njira zotsatirazi:
- Email: info@mingxuchem.com
- Webusaiti: https://www.mingxuchem.com/
Kusankha njira yoyenera yopangira zinthu zothandiza ndi gawo lofunika kwambiri pakukonza bwino ntchito ya thovu komanso kukonza bwino ntchito yopangira. Tiyeni tigwire ntchito limodzi kuti tilimbikitse chitukuko chatsopano cha ukadaulo wa thovu la polyurethane.
Nthawi yotumizira: Meyi-06-2025