Focus on Cellulose ethers

Kedu ihe bụ njirimara methylcellulose?

1. Enwere ike ịgbaze ya mgbe ọ na-ekpo ọkụ n'elu 200 ° C, na ọdịnaya uyi dị ihe dịka 0.5% mgbe ọkụ, ọ na-anọpụ iche mgbe emechara ya na mmiri. Banyere viscosity ya, ọ dabere na ogo polymerization ya.

2. Solubility na mmiri na-agbanwe agbanwe na okpomọkụ, okpomọkụ dị elu nwere obere solubility, obere okpomọkụ nwere nnukwu solubility.

3. Soluble na ngwakọta nke mmiri na organic solvents dị ka methanol, ethanol, ethylene glycol, glycerin na acetone.

4. Mgbe nnu metal ma ọ bụ organic electrolyte dị na ngwọta mmiri ya, ngwọta ahụ ka nwere ike ịnọgidesi ike. Mgbe a na-agbakwunye electrolyte na nnukwu ego, gel ma ọ bụ mmiri ozuzo ga-apụta.

5. Ọrụ elu. Mkpụrụ ndụ ya nwere otu hydrophilic na otu hydrophobic, nke nwere emulsification, nchebe colloid na nkwụsi ike nke oge.

6. Thermal gelation. Mgbe ngwọta mmiri na-ebili na ọnọdụ okpomọkụ (n'elu gel okpomọkụ), ọ ga-aghọ ígwé ojii ruo mgbe ọ ga-agbaze ma ọ bụ na-asọpụta, na-eme ka ngwọta ahụ hapụ viscosity ya, ma ọ nwere ike ịlaghachi na ọnọdụ mbụ ya site na jụrụ oyi. Ọnọdụ okpomọkụ nke gelation na mmiri ozuzo na-adabere n'ụdị ngwaahịa, ntinye nke ngwọta na ọnụego ọkụ.

7. Uru pH kwụsiri ike. Acid na alkali adịghị emetụta viscosity dị na mmiri n'ụzọ dị mfe. Mgbe agbakwunyere ụfọdụ alkali, n'agbanyeghị oke okpomọkụ ma ọ bụ obere okpomọkụ, ọ gaghị eme ka ire ere ma ọ bụ yinye kewara.

8. Ihe ngwọta nwere ike ịmepụta ihe nkiri transperent, siri ike na nke na-agbanwe n'elu mgbe ihichachara. Ọ nwere ike iguzogide ihe mgbaze organic, abụba na mmanụ dị iche iche. Ọ gaghị atụgharị edo edo mgbe ekpughere ya na ìhè, ọ gaghị apụtakwa mgbawa ntutu. Enwere ike igbari ya na mmiri ọzọ. Ọ bụrụ na a na-agbakwunye formaldehyde na ngwọta ma ọ bụ mechaa ya na formaldehyde, ihe nkiri ahụ enweghị ike ịsacha na mmiri mana ọ ka na-agbaze.

9. Ịba ụba. Ọ nwere ike ịgbanye mmiri na sistem na-abụghị mmiri, ma nwee ezigbo ọrụ mgbochi sag.

10. Mmụba viscosity. Ihe ngwọta ya na-emepụta mmiri nwere ike imekọ ihe ọnụ, nke nwere ike imeziwanye ike nke ciment, gypsum, agba, pigmenti, akwụkwọ ahụaja na ihe ndị ọzọ.

11. Okwu akwụsịla. Enwere ike iji ya chịkwaa coagulation na mmiri ozuzo nke ihe siri ike.

12. Colloid na-echebe iji mee ka nkwụsi ike ya dịkwuo elu. Ọ nwere ike igbochi nchịkọta na coagulation nke ụmụ irighiri mmiri na pigmenti, ma gbochie mmiri ozuzo nke ọma.


Oge nzipu: Jan-29-2023
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