I-Hydroxypropyl cellulose (HPC) yipolima esetyenziswa ngokuqhelekileyo kumashishini ahlukeneyo, kuquka amayeza, izinto zokuthambisa, kunye nokutya.Njengazo iipolymers ezininzi, ukuzinza kwe-thermal kunye neqondo lobushushu lokuthotywa kuxhomekeke kwizinto ezininzi ezinjengobunzima bemolekyuli, idigri yokutshintsha, ubukho bezongezo, kunye neemeko zokusetyenzwa.Nangona kunjalo, ndiza kukubonelela ngamagqabantshintshi ezinto eziphembelela ukuthotywa kwe-HPC, uluhlu lwayo lobushushu obuqhelekileyo, kunye nezinye zezicelo zayo.
1. Ubume beMichiza ye-HPC:
I-Hydroxypropyl cellulose yi-derivative ye-cellulose efunyenwe ngokunyanga i-cellulose nge-propylene oxide.Olu hlengahlengiso lweekhemikhali lunika ukunyibilika kunye nezinye iipropathi ezinqwenelekayo kwiselulosi, okwenza kube luncedo kwizicelo ezahlukeneyo.
2. Izinto ezichaphazela ukuthotywa kweThermal:
a.Ubunzima beMolekyuli: Ubunzima obuphezulu bemolekyuli i-HPC ithande ukuba nokuzinza okuphezulu kwe-thermal ngenxa yamandla anamandla e-intermolecular.
b.I-Degree of Substitution (DS): Ubungakanani bokutshintshwa kwe-hydroxypropyl buchaphazela ukuzinza kwe-thermal ye-HPC.I-DS ephezulu inokukhokelela ekuthotyweni kwamaqondo obushushu ngenxa yokwanda komngcipheko wokuqhekeka kwe-thermal.
c.Ubukho bezongezo: Ezinye izongezo zinokuphucula ukuzinza kwe-HPC ngokusebenza njenge-stabilizers okanye i-antioxidants, ngelixa ezinye zinokukhawulezisa ukuthotywa.
d.Iimeko zokuSebenza: Iimeko apho i-HPC icutshungulwa khona, njengokushisa, uxinzelelo, kunye nokuvezwa emoyeni okanye kwezinye iindawo ezisebenzayo, kunokuchaphazela ukuzinza kwayo kwe-thermal.
3. Indlela yokuNcitshiswa kweThermal:
Ukuthotywa kwe-thermal ye-HPC ngokuqhelekileyo kubandakanya ukwaphulwa kweebhondi ze-glycosidic kwi-cellulose backbone kunye nokucandeka kwamakhonkco e-ether aqaliswe ngokutshintshwa kwe-hydroxypropyl.Le nkqubo inokubangela ukuvela kweemveliso eziguqukayo ezifana namanzi, ikharbon diokside, neehydrocarbons ezahlukahlukeneyo.
4. Uluhlu lobushushu obuqhelekileyo lokuthotywa:
Iqondo lokushisa lokuthotywa kwe-HPC linokwahluka ngokubanzi ngokuxhomekeke kwizinto ezikhankanywe ngasentla.Ngokubanzi, ukuthotywa kobushushu be-HPC kuqala malunga ne-200 ° C kwaye kunokuqhubeka ukuya kumaqondo obushushu malunga ne-300-350 ° C.Nangona kunjalo, olu luhlu lunokutshintsha ngokuxhomekeke kwiimpawu ezithile zesampulu ye-HPC kunye neemeko ezivezwa kuzo.
5. Usetyenziso lwe-HPC:
Iselulosi yeHydroxypropyl ifumana ukusetyenziswa kumashishini ahlukeneyo:
a.Amachiza: Isetyenziswa njenge-thickener, i-binder, ifilimu yangaphambili, kunye ne-ejenti ekhutshweyo elawulwayo ekuxutyweni kwamayeza afana neepilisi, iipilisi, kunye namalungiselelo e-topical.
b.Izithambiso: I-HPC isetyenziswa kwizinto zokuthambisa kunye neemveliso zokhathalelo lomntu njenge-arhente etyebisayo, ukuzinzisa, kunye nefilimu yangaphambili kwiimveliso ezifana neloshini, iikhrimu, kunye nokwakheka kweenwele.
c.Ishishini lokutya: Kushishino lokutya, i-HPC isebenza njengento etyebisayo, isizinzisi, kunye ne-emulsifier kwiimveliso ezifana neesosi, isuphu, kunye nezimuncumuncu.
d.Izicelo zoShishino: I-HPC ikwaqeshwa kwizicelo ezahlukeneyo zemizi-mveliso ezinjengee-inki, ii-coatings, kunye ne-adhesives ngenxa yokwenziwa kwefilimu kunye neempawu zerheological.
iqondo lobushushu lokuthotywa kwe-thermal ye-hydroxypropyl cellulose iyahluka ngokuxhomekeke kwizinto ezinjengobunzima bemolekyuli, iqondo lokutshintshwa, ubukho bezongezo, kunye neemeko zokucubungula.Ngelixa ukuthotywa kwayo ngokuqhelekileyo kuqala malunga ne-200 ° C, inokuqhubeka ukuya kumaqondo obushushu angama-300-350 ° C.Ukuqonda izinto eziphembelela uzinzo lwe-thermal kubalulekile ekuphuculeni ukusebenza kwayo kwizicelo ezahlukeneyo kumashishini ahlukeneyo.
Ixesha lokuposa: Mar-26-2024