1. Lisebelisoa tse tala tsa ether ea selulose
Cellulose ether bakeng sa kaho ke polymer e sa qhibiliheng metsing e seng ionic eo mohloli oa eona e leng:
Cellulose (maqeba a lehong kapa k'hothone), li-hydrocarbon tse nang le halogenated (methane chloride, ethyl chloride kapa li-halide tse ling tse telele tsa ketane), metsoako ea epoxy (ethylene oxide, propylene oxide, jj.)
HPMC-Hydroxypropyl Methyl Cellulose Ether
HEC-Hydroxyethyl Cellulose Ether
HEMC-Hydroxyethyl Methyl Cellulose Ether
EHEC-Ethyl Hydroxyethyl Cellulose Ether
MC-methyl selulose ether
2. Thepa ea ether ea selulose
Thepa ea li-ether tsa cellulose e itšetlehile ka:
Tekanyo ea polymerization DP Palo ea li-unit tsa tsoekere—ho hlaka
Lintho tse nkelang sebaka le tekanyo ea tsona ea ho nkela sebaka, tekanyo ea ho tšoana ha ho nkela sebaka —- fumana tšimo ea kopo
Boholo ba Likaroloana—-Ho qhibiliha
Kalafo ea bokaholimo (ke hore, ho lieha ho qhibiliha)—nako ea viscosity e amana le boleng ba pH ba sistimi.
Tekanyo ea phetoho—-Ntlafatsa khanyetso ea ho sag le ho sebetsa ha ether ea cellulose.
3. Karolo ea ether ea cellulose - ho boloka metsi
Cellulose ether ke motsoako oa ketane ea polymer o entsoeng ka li-unit tsa β-D-glucose. Sehlopha sa hydroxyl ka har'a molek'hule le athomo ea oksijene e holim'a tlamo ea ether li etsa tlamo ea haedrojene le molek'hule ea metsi, e monyang molek'hule ea metsi holim'a ketane ea polymer 'me e tšoasa limolek'hule. Ka har'a ketane, e liehisa ho fetoha ha mouoane ha metsi 'me e monngoa ke lera la motheo.
Melemo e fanoang ke thepa ea ho boloka metsi ea li-ether tsa cellulose:
Ha ho hlokahale ho kolobisa lera la motheo, mokhoa oa ho boloka
kaho e ntle
matla a lekaneng
4. Karolo ea ether ea cellulose - phello ea ho teteana
Cellulose ether e ka eketsa momahano pakeng tsa dikarolo tsa seretse se thehilweng hodima gypsum, e leng se bonahalang keketsehong ya ho tsitsa ha seretse.
Melemo e meholo e fanoang ke ho teteana ha li-ether tsa cellulose ke:
Fokotsa molora o sitsitsoeng
Eketsa ho khomarela motheong
Fokotsa ho oa ha seretse
boloka seretse se lekana
5. Karolo ea ether ea cellulose - ts'ebetso ea bokaholimo
Cellulose ether e na le lihlopha tse hydrophilic (lihlopha tsa hydroxyl, li-ether bond) le lihlopha tse hydrophilic (lihlopha tsa methyl, lihlopha tsa ethyl, masale a glucose) 'me ke surfactant.
(Khatello ea metsi holim'a metsi ke 72mN/m, surfactant ke 30mN/m, 'me cellulose ether ke HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)
Melemo e meholo e fanoang ke ts'ebetso ea bokaholimo ba li-ether tsa cellulose ke:
Tšusumetso ea ho kenya moea (ho hohla ho boreleli, ho ba le mongobo o tlase, modulus e tlase ea elastic, khanyetso ea ho hatsela le ho qhibiliha)
Ho kolobisa (ho eketsa ho khomarela substrate)
6. Litlhoko tsa gypsum e bobebe ea ho plaster bakeng sa ether ea cellulose
(1). Ho boloka metsi hantle
(2). Bokgoni bo botle ba ho sebetsa, ha ho na ho kenngwa ka hara cake
(3). Ho hohla ka bongata ho boreleli
(4). Thibelo e matla ea ho thella
(5). Mocheso oa jeli o phahame ho feta 75°C
(6). Sekhahla se potlakileng sa ho qhalana ha thepa
(7). Ho molemo ho ba le bokgoni ba ho kenya moya le ho tsitsisa dipululana tsa moya ka hara seretse.
11. Mokhoa oa ho fumana tekanyo ea ether ea selulose
Bakeng sa ho plaster ka plaster, ho hlokahala ho boloka metsi a lekaneng ka har'a seretse ka nako e telele e le hore ho be le ts'ebetso e ntle le ho qoba mapetso a bokaholimo. Ka nako e ts'oanang, cellulose ether e boloka metsi a lekaneng nako e telele ho etsa hore seretse se be le ts'ebetso e tsitsitseng ea ho hoama.
Palo ea ether ea cellulose e itšetlehile ka:
Ho hlaka ha ether ea selulose
Mokhoa oa tlhahiso ea ether ea selulose
Dikahare tse ka Nkelang Sebaka le Kabo ya Cellulose Ether
Kabo ea Boholo ba Likaroloana tsa Cellulose Ether
Mefuta le sebopeho sa seretse se thehiloeng ho gypsum
Bokgoni ba ho monya metsi ba lera la motheo
Tšebeliso ea Metsi bakeng sa ho Hasana ho Tloaelehileng ha Seretse se Thehiloeng ho Gypsum
Nako ea ho beha seretse se thehiloeng ho gypsum
Botenya ba kaho le tshebetso ya kaho
Maemo a kaho (joalo ka mocheso, lebelo la moea, jj.)
Mokhoa oa kaho (ho hohla ka letsoho, ho fafatsa ka mechine)
Nako ea poso: Pherekhong-18-2023