ʻO ka Ethylcellulose he mea ia o ka cellulose, he polymer maoli i haku ʻia me nā ʻāpana glucose. Hoʻopili ʻia ia ma ka hoʻopili ʻana i ka cellulose me ka ethyl chloride a i ʻole ethylene oxide, e hana ana i nā molekole cellulose i hoʻololi ʻia. Loaʻa i ka Ethylcellulose kahi ʻano waiwai kemika e hoʻohana pono ai i nā ʻano hana ʻoihana a me nā lāʻau lapaʻau.
Hoʻolālā Molekala:
Mālama ʻo Ethylcellulose i ke ʻano kumu o ka cellulose, ʻo ia hoʻi nā ʻāpana glucose hou i hoʻopili ʻia e nā paʻa β-1,4-glycosidic.
Hoʻopuka mua ʻia ka hoʻololi ʻana i ka Ethyl ma nā pūʻulu hydroxyl o ka iwi kuamoʻo cellulose, ka hopena i nā degere like ʻole o ka hoʻololi ʻana (DS) e hōʻike ana i ka helu awelika o nā pūʻulu ethyl no kēlā me kēia ʻāpana glucose.
Hoʻopili ka degere o ka hoʻololi ʻana i nā waiwai o ka ethylcellulose, me ka solubility, viscosity, a me ka hiki ke hana kiʻiʻoniʻoni.
Hiki ke hoʻoheheʻe:
Ma muli o ke ʻano hydrophobic o ka hui ethyl, ʻaʻole hiki ke hoʻoheheʻe ʻia ka ethylcellulose i ka wai.
Hōʻike ia i ka hoʻoheheʻe ʻia i loko o nā ʻano mea hoʻoheheʻe kūlohelohe, me nā ʻona, nā ketones, nā esters, a me nā hydrocarbons chlorinated.
Hoʻonui ka solubility me ka emi ʻana o ke kaumaha molekala a me ka piʻi ʻana o ka ethoxylation.
Nā waiwai hana kiʻiʻoniʻoni:
Ua ʻike ʻia ʻo Ethylcellulose no kāna mau hana hana kiʻiʻoniʻoni, hana ia i mea waiwai i ka hana ʻana i nā uhi, nā kiʻiʻoniʻoni, a me nā ʻano lāʻau lapaʻau hoʻokuʻu ʻia.
ʻO ka hiki o ka ethylcellulose e hoʻoheheʻe i nā ʻano mea hoʻoheheʻe organik e hoʻoikaika i ka hoʻokumu ʻana i ke kiʻiʻoniʻoni, me ka hoʻoheheʻe ʻana o ka mea hoʻoheheʻe e waiho ana i kahi kiʻiʻoniʻoni like ʻole.
ʻO ka hana hou ʻana:
Hōʻike ka Ethylcellulose i ka haʻahaʻa haʻahaʻa ma lalo o nā kūlana maʻamau. Eia nō naʻe, hiki ke hoʻololi kemika ma o nā hopena e like me ka etherification, esterification, a me ka hoʻopili ʻana.
Hoʻokomo ʻia nā hopena etherification i ka hoʻokomo ʻana i nā mea pani hou ma ka iwi kuamoʻo cellulose, a laila hoʻololi i nā waiwai.
Hiki ke hana ʻia ka esterification ma o ka hana ʻana i ka ethylcellulose me nā ʻakika carboxylic a i ʻole nā waikawa chlorides, e hana ana i nā esters cellulose me ka solubility i hoʻololi ʻia a me nā waiwai ʻē aʻe.
Hiki ke hoʻomaka ʻia nā hopena hoʻohui keʻa e hoʻomaikaʻi i ka ikaika mechanical a me ke kūpaʻa wela o nā membrane ethyl cellulose.
Hana wela:
Hōʻike ka Ethylcellulose i ke kūpaʻa wela i loko o kekahi pae wela, ma waho aʻe o ka decomposition.
Hoʻomaka ka hoʻohaʻahaʻa wela ma kahi o 200-250 ° C, ma muli o nā kumu e like me ke kiʻekiʻe o ka hoʻololi ʻana a me ka hele ʻana o nā plasticizers a i ʻole nā mea hoʻohui.
Hoʻohana maʻamau ka ʻenehana Thermogravimetric (TGA) a me nā calorimetry scanning differential (DSC) e ʻike i ke ʻano wela o ka ethylcellulose a me kāna hui ʻana.
pili like:
Hoʻopili ʻo Ethylcellulose me nā ʻano polymers ʻē aʻe, plasticizers a me nā mea hoʻohui, kūpono ia no ka hui ʻana me nā mea ʻē aʻe e loaʻa ai nā waiwai i makemake ʻia.
Hoʻokomo ʻia nā mea hoʻohui maʻamau e like me ka polyethylene glycol (PEG) a me ka triethyl citrate, ka mea e hoʻonui ai i ka maʻalahi a me nā waiwai hana kiʻiʻoniʻoni.
He mea koʻikoʻi ka hoʻohālikelike ʻana me nā mea lāʻau lapaʻau ikaika (API) i ka hoʻokumu ʻana i nā ʻano lāʻau lapaʻau e like me nā papa hoʻokuʻu lōʻihi a me nā pā transdermal.
ʻO ka hana pale:
Hōʻike nā kiʻi ʻoniʻoni Ethylcellulose i nā waiwai pale maikaʻi loa e kūʻē i ka makū, nā kinoea a me nā mahu.
ʻO kēia mau mea pale e hana i ka ethylcellulose i kūpono no nā noi hoʻopili kahi mea koʻikoʻi ka pale ʻana mai nā mea kaiapuni i ka mālama pono ʻana o ka huahana a me ke ola papa.
Nā waiwai Rheological:
ʻO ka viscosity o nā hopena ethylcellulose e pili ana i nā mea e like me ka polymer concentration, degere o ka hoʻololi ʻana, a me ke ʻano solvent.
Hōʻike pinepine nā hoʻonā Ethylcellulose i ke ʻano pseudoplastic, ʻo ia hoʻi ka emi ʻana o ko lākou viscosity me ka piʻi ʻana o ka shear rate.
He mea nui nā haʻawina Rheological e hoʻomaopopo i nā hiʻohiʻona kahe o nā hopena ethylcellulose i ka wā o ka hana ʻana a me ka uhi ʻana.
ʻO ka Ethylcellulose kahi polymer versatile me ka nui o nā waiwai kemika e kōkua i kona pono i nā ʻano hana ʻoihana a me nā lāʻau lapaʻau. ʻO kona solubility, hiki ke hana kiʻiʻoniʻoni, reactivity, thermal stability, compatibility, barrier properties a me rheology e lilo ia i mea waiwai no ka uhi ʻana, nā kiʻiʻoniʻoni, nā hoʻopuka hoʻokuʻu ʻia ʻana a me nā hāʻina hoʻopihapiha. Ke hoʻomau nei ka noiʻi a me ka hoʻomohala ʻana i ke kahua o ka cellulose derivatives e hoʻonui i nā noi a me ka hiki o ka ethylcellulose ma nā ʻano like ʻole.
Ka manawa hoʻouna: Feb-18-2024