1. Zipangizo zopangira efa ya cellulose
Cellulose ether yomangira ndi polima yosasungunuka m'madzi yomwe imachokera:
Cellulose (yamkati mwa matabwa kapena thonje), ma hydrocarbon okhala ndi halogenated (methane chloride, ethyl chloride kapena zina zokhala ndi unyolo wautali), ma epoxy compounds (ethylene oxide, propylene oxide, ndi zina zotero)
HPMC-Hydroxypropyl Methyl Cellulose Ether
HEC-Hydroxyethyl Cellulose Ether
HEMC-Hydroxyethyl Methyl Cellulose Ether
EHEC-Ethyl Hydroxyethyl Cellulose Ether
MC-methyl cellulose ether
2. Katundu wa ether wa cellulose
Katundu wa ethers a cellulose amadalira:
Digiri ya polymerization DP Chiwerengero cha mayunitsi a shuga—kukhuthala
Zosintha ndi digiri yawo yosinthira, digiri ya kufanana kwa kusintha —- dziwani gawo logwiritsira ntchito
Kukula kwa Tinthu—-Kusungunuka
Chithandizo cha pamwamba (monga kusungunuka mochedwa)—nthawi ya kukhuthala ikugwirizana ndi pH ya dongosololi
Digiri yosinthira—-Kuwongolera kukana kwa sag ndi kuthekera kogwira ntchito kwa etha ya cellulose.
3. Udindo wa ether wa cellulose - kusunga madzi
Cellulose ether ndi gulu la unyolo wa polymer lomwe limapangidwa ndi mayunitsi a β-D-glucose. Gulu la hydroxyl mu molekyulu ndi atomu ya okosijeni pa bond ya ether zimapanga mgwirizano wa hydrogen ndi molekyulu yamadzi, yomwe imakoka molekyulu yamadzi pamwamba pa unyolo wa polymer ndikumangirira mamolekyu. Mu unyolo, umachedwetsa kutuluka kwa madzi ndipo umayamwa ndi gawo loyambira.
Ubwino woperekedwa ndi mphamvu zosungira madzi za ethers za cellulose:
Palibe chifukwa chonyowetsa gawo loyambira, njira yopulumutsira
zomangamanga zabwino
mphamvu zokwanira
4. Udindo wa ether wa cellulose - kukhuthala
Cellulose ether imatha kuwonjezera mgwirizano pakati pa zigawo za matope opangidwa ndi gypsum, zomwe zimaonekera pakuwonjezeka kwa kukhazikika kwa matope.
Ubwino waukulu womwe umaperekedwa ndi kukhuthala kwa ma ether a cellulose ndi awa:
Chepetsani phulusa losakanizika
Wonjezerani kukanikiza ku maziko
Chepetsani kugwedezeka kwa matope
sungani matope mofanana
5. Ntchito ya ether ya cellulose - ntchito ya pamwamba
Cellulose ether ili ndi magulu okonda madzi (ma hydroxyl groups, ether bonds) ndi magulu okonda madzi (methyl groups, ethyl groups, glucose rings) ndipo ndi surfactant.
(Kuthamanga kwa madzi pamwamba ndi 72mN/m, surfactant ndi 30mN/m, ndipo cellulose ether ndi HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)
Ubwino waukulu womwe umapezeka chifukwa cha ntchito ya pamwamba ya ma cellulose ethers ndi awa:
Mphamvu yolowetsa mpweya (kukanda kosalala, kunyowa pang'ono, kusinthasintha kochepa, kukana kuzizira ndi kusungunuka)
Kunyowetsa (kumawonjezera kumatirira ku substrate)
6. Zofunikira pa gypsum yopepuka yopaka pulasitala ya cellulose ether
(1). Kusunga bwino madzi
(2). Kugwira ntchito bwino, palibe kuyika makeke
(3). Kukanda bwino kwa gulu
(4). Kuletsa kutsika kwamphamvu
(5). Kutentha kwa jeli kumakhala kokwera kuposa 75°C
(6). Kuchuluka kwa kusungunuka mwachangu
(7). Ndi bwino kukhala ndi luso lotha kulowetsa mpweya ndikukhazikitsa thovu la mpweya mu matope.
11. Momwe mungadziwire mlingo wa efa wa cellulose
Pakuyika pulasitala, ndikofunikira kusunga madzi okwanira mu matope kwa nthawi yayitali kuti agwire bwino ntchito komanso kupewa ming'alu pamwamba. Nthawi yomweyo, cellulose ether imasunga madzi okwanira kwa nthawi yayitali kuti matope azikhala olimba.
Kuchuluka kwa ether ya cellulose kumadalira:
Kukhuthala kwa efa ya cellulose
Njira yopangira efa ya cellulose
Zomwe Zili M'malo ndi Kugawa kwa Cellulose Ether
Kukula kwa Tinthu ta Ether ya Cellulose
Mitundu ndi kapangidwe ka matope opangidwa ndi gypsum
Mphamvu yoyamwitsa madzi ya gawo loyambira
Kugwiritsa Ntchito Madzi Pofalitsa Madzi Ochokera ku Gypsum
Kukhazikitsa nthawi yogwiritsira ntchito matope opangidwa ndi gypsum
Kukhuthala kwa zomangamanga ndi magwiridwe antchito omanga
Mikhalidwe yomangira (monga kutentha, liwiro la mphepo, ndi zina zotero)
Njira yomangira (kukanda ndi manja, kupopera ndi makina)
Nthawi yotumizira: Januwale-18-2023