Ultra-low viscosity CMC yog ib daim ntawv tshwj xeeb ntawm carboxymethyl cellulose sodium (CMC-Na), uas muaj viscosity tsawg, dej solubility zoo, thiab muaj zog stability. Nws yog dav siv nyob rau hauv ntau yam teb. Cov ntaub ntawv tseem ceeb yog raws li nram no:
Cov yam ntxwv: Nws muaj qhov hnyav dua molecular, zoo dua solubility thiab fluidity, thiab tuaj yeem yaj sai sai hauv dej los tsim cov tshuaj colloidal. Nyob rau tib lub sijhawm, nws kuj muaj kev ruaj ntseg zoo, tuaj yeem tswj tau lub xeev yaj nyob rau hauv qhov sib txawv ntawm qhov kub thiab txias pH, thiab tuaj yeem ua tau zoo emulsify thiab disperse hauv cov kua.
Ultra-tsis tshua muaj viscosity CMC, vim nws cov khoom tshwj xeeb, muaj kev siv dav hauv ntau qhov chaw, raws li hauv qab no:
Kev lag luam ntawv: siv rau hauv cov ntawv txheej thiab cov ntaub ntawv tsim tawm, ua tus neeg saib xyuas kev tswj hwm, tus neeg saib xyuas dej, zaj duab xis- tus neeg sawv cev, thiab cov nplaum nplaum rau cov txheej txheem, nws tuaj yeem ua rau cov ntsiab lus ntawm cov txheej txheej thiab tswj cov khoom zoo rheological, txhim kho kev hloov pauv ntawm daim ntawv luam ntawv, thiab tsim nyog rau siab - txheej txheej txheej txheej ceev.
Kev lag luam textile: siv los ua tus neeg sawv cev sizing thiab thickener rau luam ntawv pastes, pab txhim kho kev luam ntawv zoo ntawm textiles, thiab tseem tuaj yeem siv rau kev kho mob ntawm textiles los txhim kho qhov adhesion thiab hnav tsis kam ntawm fibers.
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Raw khoom pretreatment:
Xaiv high-purity cellulose raw cov ntaub ntawv, tom qab sib tsoo thiab tshuaj ntsuam xyuas, kho lawv nrog cov tshuaj alkaline (feem ntau NaOH tov) rau alkalization los so cov cellulose molecular chains thiab tsim alkyl cellulose (cellulose sodium), tsim tej yam kev mob rau cov tom ntej etherification cov tshuaj tiv thaiv. Lub alkalization tej yam kev mob (xws li kub, alkali concentration, thiab lub sij hawm) yuav tsum tau precisely tswj kom tsis txhob muaj ntau degradation los yog tsis sib xws tshwm sim.
Etherification cov tshuaj tiv thaiv:
alkyl cellulose reacts nrog tus neeg sawv cev etherifying (xws li sodium chloroacetate) ntawm qhov kub thiab txias (feem ntau yog 50-70 degree) thiab hnyav (xws li ethanol- dej sib tov) los qhia carboxymethyl pawg (-CH₂COONa). Cov kauj ruam no yog qhov tseem ceeb rau kev tswj cov viscosity: los ntawm kev kho qhov ntau npaum ntawm etherifying tus neeg saib xyuas, lub sij hawm tshuaj tiv thaiv, kub, thiab lwm yam, qhov kev hloov pauv thiab qhov hnyav molecular tuaj yeem tswj tau - qhov hnyav dua molecular thiab qib qis hloov pauv (feem ntau yog 0.5-1.2) tuaj yeem ua tiav cov yam ntxwv viscosity ultra-low viscosity.
Neutralization thiab ntxuav:
Tom qab cov tshuaj tiv thaiv, neutralize ntau alkali nrog acid (xws li hydrochloric acid) kom pH tus nqi ntawm cov khoom nruab nrab. Tom qab ntawd, los ntawm kev ntxuav (feem ntau nrog cov tshuaj ethanol), tshem tawm cov khoom tsis huv, ntsev, thiab los ntawm - cov khoom los txhim kho cov khoom purity, zam cov impurities seem uas cuam tshuam rau cov ntawv thov tom ntej (xws li hauv cov khoom noj thiab tshuaj uas purity siab heev).
Qhuav thiab sib tsoo:
Cov khoom ntub dej tom qab cov tshuaj tiv thaiv qhuav (xws li cua kub kom qhuav) kom tshem tawm cov dej noo, tswj cov dej noo hauv qab 10%, thiab tom qab ntawd hauv av rau hauv cov hmoov me me kom tau txais cov khoom siv ultra-low viscosity CMC. Qhov ziab kom qhuav yuav tsum yog nruab nrab los tiv thaiv cov khoom degradation lossis xim hloov los ntawm qhov kub thiab txias.
Tom qab-kev kho mob:
Nyob ntawm daim ntawv thov, qee cov khoom yuav raug kho kom zoo ntxiv (xws li decolorization, impurity tshem tawm) lossis kho kev hloov kho (xws li ntoo khaub lig- txuas, sib txuas) kom ua kom zoo dua lawv cov dispersibility, ntsev, thiab lwm yam khoom kom tau raws li cov kev xav tau ntawm thaj chaw tshwj xeeb (xws li lithium roj teeb, tshuaj).
txheej txheem tshwj xeeb:
Thib ob tshuaj viscosity txo. Lub hauv paus ntawm tag nrho cov txheej txheem yog nyob rau hauv precisely tswj cov raw khoom pretreatment thiab etherification cov tshuaj tiv thaiv tej yam kev mob kom ua tau zoo cov kev cai ntawm molecular hnyav thiab viscosity, thaum uas xyuas kom meej cov ntsiab lus tseem ceeb xws li dej solubility thiab stability.
Txheej txheem ntau lawm
Raw Material Control - nruj me ntsis xaiv raw khoom
Siv siab -purity cellulose (xws li silver star wood pulp), yuav tsum muaj cov ntsiab lus cellulose siab (feem ntau ntau dua los yog sib npaug li 95%) thiab ob peb impurities (xws li cov hmoov tshauv tsawg, cov ntsiab lus hlau ion tsawg), kom tsis txhob muaj impurities cuam tshuam rau cov tshuaj tiv thaiv tom qab thiab cov khoom purity crushed . - Standardized Raw Materials Preatment ntawm lub cell yuav tsum yog {3} uniform. Ua ntej alkalization, cov khoom loj yuav tsum tau muab tshem tawm los ntawm kev tshuaj xyuas kom ntseeg tau tias cov tshuaj tiv thaiv alkalization txaus thiab zoo ib yam.
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Reaction Process Parameter Control - Qib Alkalization:
Precisely tswj cov concentration ntawm alkaline tov (xws li NaOH concentration 15%-20%), kub (20-30 degree), thiab cov tshuaj tiv thaiv lub sij hawm (1-2 teev), kom tsis txhob muaj alkalization ntau dhau uas ua rau tsis sib xws cellulose degradation thiab cuam tshuam rau cov tom ntej etherification efficiency . - Etherification theem ntawm cov tshuaj: chloroacetate), cov tshuaj tiv thaiv kub (50-70 degree), tshuaj tiv thaiv lub sij hawm, thiab hnyav piv, nruj me ntsis tswj qhov hloov pauv qib (feem ntau yog 0.5-1.2) thiab qhov hnyav molecular - Qhov kev hloov pauv qis yuav ua rau cov dej tsis zoo, thaum hloov pauv qib siab tuaj yeem nce viscosity; Qhov hnyav molecular yuav tsum tau tswj los ntawm cov tshuaj tiv thaiv rau lub hom phiaj ntau kom ntseeg tau tias cov khoom kawg viscosity ua tau raws li tus qauv (xws li viscosity ntawm 1% dej tov <50 mPa·s).
02
Purification thiab Ntxuav Tswj - Neutralization Precision:
Thaum neutralizing tshaj alkaline nrog hydrochloric acid, nruj me ntsis tswj tus nqi pH nyob rau hauv 6.5-7.5 kom tsis txhob muaj zog acidity, ua rau cov khoom degradation los yog residual alkalinity cuam tshuam rau stability. - Multi-stage Ntxuav: Siv ib tug sib tov ntawm ethanol thiab dej rau ntau yam ntxuav los ntawm unreacted ntsev, unreacted tus neeg sawv cev. kom ntseeg tau cov khoom purity (xws li cov zaub mov qib purity Ntau dua los yog sib npaug li 99%, siab dua rau qib tshuaj), thiab kuaj cov conductivity ntawm cov kua ntxhua kom ntseeg tau tias nws ua tau raws li tus qauv ua ntej tso tseg kev ntxuav.
03
Qhuav thiab Post-Kev Tswj Xyuas Kev Kho Mob - Kev ziab kom qhuav:
Tswj qhov kub kom qhuav (60-80 degree) thiab lub sij hawm kom tsis txhob kub siab ua rau cov khoom degradation los yog discoloration, kom cov dej noo <10%, tiv thaiv caking los pwm loj hlob . - Particle Loj ntawm Crushing: Tswj cov particle loj ntawm cov khoom tiav (xws li 80-200 mesh) raws li daim ntawv thov kom paub meej cov khoom dispersion ceev thiab dissolution.
04
Kev kuaj cov khoom tiav thiab kev ua tau zoo traceability - Kev ntsuas qhov ntsuas tseem ceeb:
Ua ntej tawm hauv lub Hoobkas, sim viscosity (1% dej tov, 25 degree), hloov degree, purity (cov ntsiab lus tshauv, hnyav hlau), pH tus nqi, noo noo, thiab lwm yam., kom ua raws li cov qauv kev lag luam . - Batch Management: Sau cov khoom raw, cov tshuaj tiv thaiv, thiab cov txiaj ntsig kev xeem kom ua tiav cov txiaj ntsig zoo, ua kom muaj teeb meem raws sij hawm. Los ntawm cov kev ntsuas saum toj no, ultra-tsis tshua muaj viscosity CMC tuaj yeem ua tau raws li cov kev cai nruj ntawm ntau yam xws li cov khoom noj, tshuaj, thiab lithium roj teeb nyob rau hauv cov nqe lus ntawm viscosity stability, purity, thiab applicability.
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Lub cev thiab tshuaj ntsuas ntsuas
|
Qhov tshwm sim |
Dawb los yog daj me ntsis hmoov hmoov |
|
PH |
7.5-8.5 |
|
D.S |
8.0-9.0 |
|
Moisture |
7-9 |
|
viscosity |
＜25 |
|
Purity |
＞90 |
Khoom nta
① Solubility zoo heev, tuaj yeem yaj sib npaug los ntawm kev nplawm ntawm chav tsev kub.
② Cov khoom ruaj khov tuaj yeem khaws cia tau ntev.
③ Cov nplaum ntawm cov ntawv hloov pauv coated yog qhov ruaj khov thiab tuaj yeem khaws cia rau lub sijhawm ntev.
④ Tus nqi hloov pauv ntawm cov ntawv hloov pauv yog ntau dua 85%, thiab cov qauv hloov pauv muaj cov xim ci thiab siab precision.
⑤ Thaum siv ua ke nrog CMC, nws tuaj yeem txo tus nqi ntawm thermal sublimation txheej thiab txhim kho lub sijhawm ziab.
⑥ Ua kom cov ntsiab lus ntawm cov thermal sublimation tov, txo cov viscosity ntawm txheej, thiab xim ntawm cov ntawv luam tawm yog ci.
Cim npe nrov: ultra- low viscosity cmc rau thermal sublimation daim ntaub ntawv, Tuam Tshoj ultra- low viscosity cmc rau thermal sublimation daim ntaub ntawv manufacturers, lwm tus neeg, Hoobkas
