Ngwa ngwa dị mkpa maka plasta gypsum dị arọ - cellulose ether

1. Ngwa ngwa nke cellulose ether

Cellulose ether maka owuwu bụ polymer na-abụghị ionic mmiri soluble nke isi mmalite ya bụ:

Cellulose (osisi pulp ma ọ bụ owu linter), halogenated hydrocarbons (methane chloride, ethyl chloride ma ọ bụ ndị ọzọ ogologo yinye halides), epoxy ogige (ethylene oxide, propylene oxide, wdg).

HPMC-Hydroxypropyl Methyl Cellulose Ether

HEC-Hydroxyethyl cellulose ether

HEMC-Hydroxyethyl Methyl Cellulose Ether

EHEC-Ethyl Hydroxyethyl Cellulose Ether

MC-methyl cellulose ether

2. Njirimara nke cellulose ether

Njirimara nke cellulose ethers dabere na:

Polymerization ogo DP Ọnụọgụ nke glucose — viscosity

Ndị nọchiri anya na ogo ha nke nnọchi, ogo nke edo edo nke nnọchi --ekpebi mpaghara ngwa

Nha urughuru —- sọlubility

Ọgwụgwọ n'elu (ya bụ mgbasa na-egbu oge) --oge viscosity metụtara uru pH nke sistemụ ahụ.

Ngozi mgbanwe--Melite nguzogide sag na ịrụ ọrụ nke ether cellulose.

3. Ọrụ cellulose ether - njide mmiri

Cellulose ether bụ ụdọ polymer nke mejupụtara nkeji β-D-glucose mejupụtara. Otu hydroxyl dị na molecule na oxygen atom na ether bond na-eme njikọ hydrogen na molecule mmiri, nke na-eme ka mmiri dị n'elu nke polymer yinye ma na-ekekọta ụmụ irighiri ihe. N'ime agbụ ahụ, ọ na-egbu oge evaporation nke mmiri ma na-etinye uche ya na oyi akwa isi.

Uru enyere site na njide mmiri nke cellulose ethers:

Ọ dịghị mkpa ka mmiri oyi akwa akwa, na-azọpụta usoro

ezi ihe owuwu

ike zuru oke

4. Ọrụ nke cellulose ether - mmetụta na-egbuke egbuke

Cellulose ether nwere ike ime ka njikọ dị n'etiti ihe ndị dị na gypsum gypsum mortar, nke na-egosipụta na mmụba nke nkwụsị nke ngwa agha ahụ.

Uru ndị bụ isi nke ethers cellulose na-enye bụ:

Belata ntụ ala

Mee ka adhesion na ntọala

Belata mgbochi nke ngwa agha

debe ngwa ngwa ọbụna

5. Ọrụ cellulose ether - ọrụ elu

Cellulose ether nwere hydrophilic otu (hydroxyl otu, ether bonds) na hydrophobic otu (methyl otu ethyl otu, glucose mgbanaka) na bụ surfactant.

(The elu esemokwu nke mmiri bụ 72mN / m, surfactant bụ 30mN / m, na cellulose ether bụ HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN / m)

Uru ndị bụ isi nyere site na ọrụ elu nke cellulose ethers bụ:

Mmetụta ikuku na-eme ka ikuku (nyochaa nke ọma, njupụta mmiri dị ala, modul ngbanwe dị ala, nguzogide friza)

Wetting (na-abawanye adhesion na mkpụrụ)

6. Ihe achọrọ nke gypsum plasta ọkụ maka cellulose ether

(1). Ezigbo njide mmiri

(2). Arụ ọrụ nke ọma, enweghị nri

(3). Ogbe scraping ire ụtọ

(4). Ike mgbochi sagging

(5). Okpomọkụ gel dị elu karịa 75 Celsius

(6). Ọnụọgụ mgbasa ngwa ngwa

(7). Ọ kachasị mma ịnwe ike itinye ikuku na ịkwado ikuku ikuku na ngwa agha

11. Otu esi achọpụta usoro onunu ogwu nke cellulose ether

Maka plasta plasta, ọ dị mkpa ijigide mmiri zuru oke na ngwa ngwa ogologo oge iji nwee ike ịrụ ọrụ nke ọma na iji zere mgbawa elu. N'otu oge ahụ, cellulose ether na-ejigide mmiri kwesịrị ekwesị ruo ogologo oge iji mee ka ngwa agha ahụ nwee usoro nhazi coagulation kwụsiri ike.

Ọnụ ọgụgụ nke cellulose ether dabere na:

Viscosity nke cellulose ether

Usoro mmepụta nke cellulose ether

Ọdịnaya nọchiri anya na nkesa Cellulose Ether

Nkesa nha nha nke cellulose ether

Ụdị na ngwakọta nke ngwa agha dabeere na gypsum

The mmiri absorption ike nke isi oyi akwa

Oriri mmiri maka Mgbasa Ọkọlọtọ nke Mortar dabere na Gypsum

Ịtọ oge ngwa ngwa dabere na gypsum

Ihe owuwu ihe owuwu na arụmọrụ ihe owuwu

Ọnọdụ ihe owuwu (dị ka okpomọkụ, ọsọ ifufe, wdg)

Usoro ihe owuwu (iji aka na-akpụcha ihe, ịgbasa igwe)


Oge nzipu: Jan-18-2023