Ntho ea bohlokoa e tala bakeng sa gypsum e entsoeng ka mokhoa o bobebe - cellulose ether

1. Lintho tse tala tsa cellulose ether

Cellulose ether bakeng sa kaho ke polima e qhibilihang ka metsing e seng ionic eo mohloli oa eona e leng:

Cellulose (matlapa a lehong kapa lesela la k'hothone), li-hydrocarbon tse halogenated (methane chloride, ethyl chloride kapa halide tse ling tse telele), metsoako ea epoxy (ethylene oxide, propylene oxide, joalo-joalo)

HPMC-Hydroxypropyl Methyl Cellulose Ether

HEC-Hydroxyethyl Cellulose Ether

HEMC-Hydroxyethyl Methyl Cellulose Ether

EHEC-Ethyl Hydroxyethyl Cellulose Ether

MC-methyl cellulose ether

2. Thepa ea cellulose ether

Thepa ea cellulose ether e itšetlehile ka:

Polymerization degree DP Palo ea likarolo tsa tsoekere-viscosity

Li-substituents le tekanyo ea tsona ea ho fetola, tekanyo ea ho lumellana ha sebaka -- khetholla sebaka sa kopo

Particle Size--Solubility

Phekolo ea bokaholimo (ke hore, ho lieha ho felisoa) - nako ea viscosity e amana le boleng ba pH ba sistimi.

Tekanyo ea ho fetola - Ntlafatsa ho hanyetsa le ho sebetsa ha cellulose ether.

3. Karolo ea cellulose ether - ho boloka metsi

Cellulose ether ke motsoako oa polymer chain o entsoeng ka yuniti ea β-D-glucose. Sehlopha sa hydroxyl ka molek'hule le athomo ea oksijene holim'a tlamo ea ether li theha tlamo ea hydrogen le molek'hule ea metsi, e khahlang molek'hule ea metsi holim'a ketane ea polymer ebe e kopanya limolek'hule. Ka ketane, e lieha ho tsoa ha metsi 'me e monngoa ke lera la motheo.

Melemo e fanoang ke thepa ea ho boloka metsi ea cellulose ethers:

Ha ho hlokahale ho kolobisa lera la motheo, mokhoa oa ho boloka

kaho e ntle

matla a lekaneng

4. Karolo ea cellulose ether - phello e teteaneng

Cellulose ether e ka eketsa momahano pakeng tsa likarolo tsa seretse se thehiloeng ho gypsum, se bonahalang ka ho eketseha ha ho tsitsa ha seretse.

Melemo ea mantlha e fanoang ke ho tiea ha cellulose ethers ke:

Fokotsa molora oa fatše

Eketsa ho khomarela motheong

Fokotsa ho sisinyeha ha seretse

boloka seretse hantle

5. Karolo ea cellulose ether - mosebetsi oa holim'a metsi

Cellulose ether e na le lihlopha tsa hydrophilic (lihlopha tsa hydroxyl, li-ether bond) le lihlopha tsa hydrophobic (lihlopha tsa methyl, lihlopha tsa ethyl, mehele ea tsoekere) 'me ke sehlahisoa.

(Tension ea holim'a metsi ke 72mN/m, surfactant ke 30mN/m, le cellulose ether ke HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)

Melemo ea mantlha e fanoang ke ts'ebetso ea bokaholimo ba cellulose ethers ke:

Matla a ho kenya moea (ho khoahla ha boreleli, metsi a tlase a mongobo, modulus e tlase ea elastic, ho hanyetsa ho qhibiliha ha leqhoa)

Ho kolobisa (ho eketsa ho khomarela ho substrate)

6. Litlhoko tsa gypsum e entsoeng ka leseli bakeng sa cellulose ether

(1). Ho boloka metsi hantle

(2). Ho sebetsa hantle, ha ho na ho pheha

(3). Batch scraping boreleli

(4). Anti-sagging e matla

(5). Mocheso oa gel o phahame ho feta 75°C

(6). Sekhahla sa ho qhibiliha ka potlako

(7). Ho molemo ho ba le bokhoni ba ho kenya moea le ho tsitsisa li-bubble tsa moea seretseng

11. Mokhoa oa ho tseba tekanyo ea cellulose ether

Bakeng sa li-plaster plasters, ho hlokahala hore u boloke metsi a lekaneng ka seretse ka nako e telele e le hore ho be le ts'ebetso e ntle ea ho sebetsa le ho qoba mapetsong a holim'a metsi. Ka nako e ts'oanang, cellulose ether e boloka palo e loketseng ea metsi ka nako e telele ho etsa hore seretse se be le ts'ebetso e tsitsitseng ea coagulation.

Palo ea cellulose ether e itšetlehile ka:

Viscosity ea cellulose ether

Mokhoa oa tlhahiso ea cellulose ether

Likahare tsa Substituent le Kabo ea Cellulose Ether

Kabo ea boholo ba karolo ea cellulose Ether

Mefuta le sebopeho sa seretse se thehiloeng ho gypsum

Matla a ho monya metsi a lera la motheo

Tšebeliso ea Metsi bakeng sa Phallo e Tloaelehileng ea Seretse se Thehiloeng ka Gypsum

Ho beha nako ea seretse se thehiloeng ho gypsum

Botenya ba kaho le ts'ebetso ea kaho

Maemo a kaho (joalo ka mocheso, lebelo la moea, joalo-joalo)

Mokhoa oa kaho (ho phurula ka letsoho, ho fafatsa ka mochini)


Nako ea poso: Jan-18-2023