Hydroxypropyl methylcellulose (HPMC) bụ ihe mejupụtara ọtụtụ ọrụ nke a na-ejikarị eme ihe n'ọtụtụ ụlọ ọrụ n'ihi ihe mejupụtara kemịkalụ na ihe onwunwe ya pụrụ iche.
1. Ihe mejupụtara kemịkalụ:
a. Ọkpụkpụ azụ nke cellulose:
HPMC bụ ihe sitere na cellulose, nke pụtara na ọ sitere na cellulose, polysaccharide eke nke a na-ahụ na mgbidi sel osisi. Cellulose nwere nkeji β-D-glucose ugboro ugboro nke ejikọtara ya na β(1→4) glycosidic bonds.
b. Ndochi:
Na HPMC, a na-eji otu methyl na hydroxypropyl dochie akụkụ hydroxyl (-OH) nke ọkpụkpụ azụ cellulose. Mgbanwe a na-eme site na mmeghachi omume etherification. Ogo nke nnọchi (DS) na-ezo aka na ọnụọgụgụ nke otu hydroxyl nke edochiri otu glucose ọ bụla na yinye cellulose. DS nke otu methyl na hydroxypropyl dị iche, nke na-emetụta arụmọrụ nke HPMC.
2. Nhazi:
a. Ịkọwapụta:
A na-emepụta HPMC site na mmeghachi omume etherification nke cellulose na propylene oxide na methyl chloride. Usoro a gụnyere imeghachi omume cellulose na propylene oxide iji webata otu hydroxypropyl wee jiri methyl chloride webata otu methyl.
b. Ọkwa nke njikwa ọzọ:
Enwere ike ijikwa DS nke HPMC site na ịgbanwe ọnọdụ mmeghachi omume dịka okpomọkụ, oge mmeghachi omume, na ntinye uche nke mmeghachi omume.
3. Arụmọrụ:
a. Mmiri:
A na-agbaze HPMC na mmiri na ụfọdụ ihe mgbaze organic, dị ka methanol na ethanol. Agbanyeghị, ike ịgbaze ya na-ebelata ka ibu molekul na-abawanye na oke nnọchi ya.
b. Nhazi ihe nkiri:
HPMC na-emepụta ihe nkiri na-agbanwe agbanwe ma na-apụta ìhè mgbe ọ gbazere n'ime mmiri. Ihe nkiri ndị a nwere ezigbo ike igwe na ihe mgbochi.
C. Viscositi:
Ngwọta HPMC na-egosipụta omume pseudoplastic, nke pụtara na viscosity ha na-ebelata ka ọnụego shea na-abawanye. viscosity nke ngwọta HPMC dabere na ihe ndị dị ka ntinye uche, ibu molekul, na oke nnọchi.
d. Njide mmiri:
Otu n'ime ihe ndị dị mkpa nke HPMC bụ ikike ya idobe mmiri. Ihe onwunwe a dị oke mkpa n'ọtụtụ ọrụ dịka ihe owuwu, ebe a na-eji HPMC eme ihe dị ka ihe na-eme ka mmiri sie ike ma na-ejide ya.
e. Nrapara:
A na-ejikarị HPMC eme ihe dị ka ihe na-arapara n'ọtụtụ ụlọ ọrụ n'ihi ikike ya ịmepụta njikọ siri ike na ihe dị iche iche.
4. Ngwa:
a. Ụlọ ọrụ ọgwụ:
N'ọgwụ, a na-eji HPMC eme ihe dị ka ihe na-ejikọ ihe, ihe mkpuchi ihe nkiri, ihe na-enye mwepụta a na-achịkwa, na ihe na-agbanwe viscosity na ọgwụ mbadamba.
b. Ụlọ ọrụ ihe owuwu:
A na-etinye HPMC na ngwa agha e ji simenti mee, ihe e ji gypsum mee na ihe e ji taịlị mee iji mee ka ọrụ dịkwuo mma, idobe mmiri na ịrapara.
C. ụlọ ọrụ nri:
N'ụlọ ọrụ nri, a na-eji HPMC eme ihe dị ka ihe na-eme ka ihe sie ike, ihe na-eme ka ihe sie ike, na ihe na-eme ka ihe dị nro na ihe ndị ọzọ dị ka ihendori, ihe e ji emechi ihe na ice cream.
d. Ngwaahịa nlekọta onwe onye:
A na-eji HPMC eme ihe dị ka ihe na-eme ka ihe sie ike, ihe na-eme ka ihe dị nro, na ihe na-emepụta ihe nkiri na ngwaahịa nlekọta onwe onye dịka shampoos, ude na ude.
e. Agba na Mkpuchi:
N'ime agba na ihe mkpuchi, a na-eji HPMC eme ka mgbasa nke agba, njikwa viscosity na njigide mmiri dịkwuo mma.
Hydroxypropylmethylcellulose (HPMC) bụ ngwakọta dị iche iche nke nwere ọtụtụ ojiji n'ọtụtụ ụlọ ọrụ dị iche iche. Ihe mejupụtara kemịkalụ ya pụrụ iche, njikọta ya na ihe ndị dị na ya na-eme ka ọ bụrụ ihe dị mkpa na ọgwụ, ihe owuwu ụlọ, nri, ngwaahịa nlekọta onwe onye na agba/mkpuchi. Ịghọta ihe ndị dị na HPMC na-enye ohere maka ojiji ahaziri iche n'ọtụtụ ngalaba dị iche iche, na-enye aka na ojiji ya na mkpa ya n'usoro mmepụta nke oge a.
Oge ozi: Febụwarị-22-2024