Ether hydroxypropyl starch (HPS)nacellulose etherbụ ihe mgbakwunye kemịkalụ abụọ a na-ejikarị arụ ụlọ, nke a na-ejikarị eme ihe n'ihe owuwu ụlọ, dị ka ngwa agha, ntụ ntụ putty, ihe mkpuchi, wdg. Ọ bụ ezie na ha nwere myirịta na ụfọdụ ihe onwunwe, enwere nnukwu ọdịiche n'ọtụtụ akụkụ dịka isi mmalite ihe eji arụ ọrụ, nhazi kemịkalụ, ihe onwunwe anụ ahụ, mmetụta ngwa, na ọnụ ahịa.
1. Isi mmalite ihe ndị e ji emepụta ihe na nhazi kemịkalụ
Ether hydroxypropyl starch (HPS)
A na-eji HPS eme ihe site na starch eke ma na-enweta ya site na mmeghachi omume mgbanwe etherification. Isi ihe ndị dị na ya bụ ọka, wit, poteto na osisi ndị ọzọ sitere n'okike. Mkpụrụ ndụ starch mejupụtara mkpụrụ ndụ glucose nke α-1,4-glycosidic bonds jikọtara na obere α-1,6-glycosidic bonds. Mgbe hydroxypropylation gasịrị, a na-ewebata otu hydrophilic hydroxypropyl group n'ime nhazi molekul HPS, na-enye ya ụfọdụ ọrụ siri ike, idobe mmiri na mgbanwe.
cellulose ether
A na-esi na cellulose ethers sitere na cellulose eke, dịka owu ma ọ bụ osisi. Cellulose nwere otu glucose nke ejikọtara ya na β-1,4-glycosidic bonds. Cellulose ethers ndị a na-ahụkarị gụnyere hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), hydroxyethyl cellulose (HEC), wdg. Ihe ndị a na-ewebata ihe ndị dị iche iche site na mmeghachi omume etherification ma nwee nkwụsi ike kemịkalụ na ihe ndị dị na anụ ahụ.
2. Àgwà anụ ahụ
Àgwà arụmọrụ nke HPS
Ịkpụkpọ: HPS nwere mmetụta dị mma n'ịkpụkpọ, mana ma e jiri ya tụnyere cellulose ether, ikike ịkpụkpọ ya adịghị ike.
Nchekwa mmiri: HPS nwere nchekwa mmiri dị mma ma dabara adaba maka ihe owuwu dị ala ruo etiti.
Ọrụ: HPS nwere ike ime ka ngwa agha dịkwuo mma ma belata nsụda n'oge a na-arụ ya.
Nguzogide okpomọkụ: HPS na-enwe mmetụta dị ukwuu na okpomọkụ ma okpomọkụ gburugburu na-emetụta ya nke ukwuu.
Àgwà arụmọrụ nke cellulose ethers
Ịkpụ akpụ: Cellulose ether nwere mmetụta siri ike nke na-eme ka ọkpụrụkpụ sie ike ma nwee ike ime ka viscosity nke ngwa agha ma ọ bụ putty dịkwuo elu nke ukwuu.
Nchekwa mmiri: Cellulose ether nwere ezigbo ihe eji echekwa mmiri, ọkachasị n'ebe okpomọkụ dị elu, nke nwere ike ịgbatị oge mmeghe nke ngwa agha ahụ ma gbochie oke mmiri ịpụ apụ.
Ike Ọrụ: Cellulose ether dị mma n'imeziwanye ike ọrụ ma nwee ike ibelata nsogbu dịka mgbawa na ntụ ntụ nke ọma.
Nguzogide okpomọkụ: Cellulose ether nwere ike ime mgbanwe siri ike na mgbanwe okpomọkụ yana arụmọrụ kwụsiri ike.
3. Mmetụta ngwa
Mmetụta ngwa nkeHPS
N'ime ụrọ kpọrọ nkụ, HPS na-arụ ọrụ nke ọma n'ime ka ọrụ dịkwuo mma, ime ka mmiri dịgide, na ibelata mmebi na nkewa. Ọ dị ọnụ ala ma dịkwa mma maka ojiji n'ọnọdụ ndị nwere oke mkpa njikwa ọnụ ahịa, dịka ntụ ntụ putty dị n'ime mgbidi nkịtị, ụrọ nhazi ala, wdg.
Mmetụta ojiji nke cellulose ether
Cellulose ethersA na-ejikarị ya eme ihe n'ọtụtụ ebe n'ihe eji arụ ọrụ dị elu, ihe ndị e ji taịlị mee, ihe ndị e ji gypsum mee na sistemu mkpuchi mgbidi mpụta. Ihe ndị dị na ya nke na-eme ka ihe ndị dị n'ime ya sie ike ma na-ejide mmiri nwere ike ime ka ike njikọ ya na arụmọrụ mgbochi ịmịpụ nke ihe ahụ ka mma nke ukwuu, ọ dịkwa mma karịsịa maka ọrụ ndị nwere nnukwu ihe achọrọ na arụmọrụ owuwu na ịdị mma nke ngwaahịa emechara.
4. Ọnụ ego na nchekwa gburugburu ebe obibi
ọnụ ahịa:
HPS dị ọnụ ala ma dịkwa mma maka iji ya n'ahịa ndị na-anaghị achọ ọnụ ahịa. Cellulose ethers dị oke ọnụ, mana ha nwere arụmọrụ dị mma ma na-arụkwa ọrụ dị oke ọnụ n'ọrụ owuwu siri ike.
Nchedo gburugburu ebe obibi:
Ha abụọ sitere na ihe ndị sitere n'okike ma nwee ezigbo ihe onwunwe gburugburu ebe obibi. Agbanyeghị, n'ihi na a na-eri obere ihe ndị na-emepụta kemịkalụ n'usoro mmepụta nke HPS, ibu gburugburu ebe obibi ya nwere ike ịdị ala.
5. Ntọala nhọrọ
Ihe achọrọ maka arụmọrụ: Ọ bụrụ na ị nwere nnukwu ihe achọrọ maka ihe ndị na-eme ka mmiri sie ike na ihe ndị na-ejide mmiri, ị kwesịrị ịhọrọ cellulose ether; maka ihe ndị na-adịghị ọnụ ahịa mana chọrọ mmezi ụfọdụ na ike ọrụ, ị nwere ike ịtụle iji HPS.
Ọnọdụ ojiji: Ọdịdị okpomọkụ dị elu, mkpuchi mgbidi mpụta, ihe mgbakwụnye taịlị na ọnọdụ ndị ọzọ chọrọ nkwado arụmọrụ dị elu dabara adaba maka cellulose ether; maka putty mgbidi ime ụlọ ma ọ bụ ngwa agha nkịtị, HPS nwere ike inye ngwọta dị ọnụ ala na nke bara uru.
Ether nke Hydroxypropyl starchnacellulose ether onye ọ bụla nwere uru nke ya, ha na-arụkwa ọrụ dị iche iche n'ihe owuwu ụlọ. A ga-atụle nhọrọ ahụ nke ọma dabere na ihe achọrọ maka arụmọrụ, njikwa ọnụ ahịa, gburugburu ebe obibi na ihe ndị ọzọ dị na ọrụ ahụ iji nweta mmetụta kachasị mma maka ojiji.
Oge ozi: Nọvemba-21-2024